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Russell King 2008-04-19 17:17:34 +01:00 committed by Russell King
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6
Documentation/00-INDEX
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@ -167,10 +167,8 @@ highuid.txt
- notes on the change from 16 bit to 32 bit user/group IDs.
hpet.txt
- High Precision Event Timer Driver for Linux.
hrtimer/
- info on the timer_stats debugging facility for timer (ab)use.
hrtimers/
- info on the hrtimers subsystem for high-resolution kernel timers.
timers/
- info on the timer related topics
hw_random.txt
- info on Linux support for random number generator in i8xx chipsets.
hwmon/

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Documentation/ABI/obsolete/o2cb Normal file
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What: /sys/o2cb symlink
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com
Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will
be removed when new versions of ocfs2-tools which know to look
in /sys/fs/o2cb are sufficiently prevalent. Don't code new
software to look here, it should try /sys/fs/o2cb instead.
See Documentation/ABI/stable/o2cb for more information on usage.
Users: ocfs2-tools. It's sufficient to mail proposed changes to
ocfs2-devel@oss.oracle.com.

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@ -0,0 +1,10 @@
What: /sys/fs/o2cb/ (was /sys/o2cb)
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com
Description: Ocfs2-tools looks at 'interface-revision' for versioning
information. Each logmask/ file controls a set of debug prints
and can be written into with the strings "allow", "deny", or
"off". Reading the file returns the current state.
Users: ocfs2-tools. It's sufficient to mail proposed changes to
ocfs2-devel@oss.oracle.com.

89
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@ -0,0 +1,89 @@
What: /sys/fs/ocfs2/
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2 directory contains knobs used by the
ocfs2-tools to interact with the filesystem.
What: /sys/fs/ocfs2/max_locking_protocol
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/max_locking_protocol file displays version
of ocfs2 locking supported by the filesystem. This version
covers how ocfs2 uses distributed locking between cluster
nodes.
The protocol version has a major and minor number. Two
cluster nodes can interoperate if they have an identical
major number and an overlapping minor number - thus,
a node with version 1.10 can interoperate with a node
sporting version 1.8, as long as both use the 1.8 protocol.
Reading from this file returns a single line, the major
number and minor number joined by a period, eg "1.10".
This file is read-only. The value is compiled into the
driver.
What: /sys/fs/ocfs2/loaded_cluster_plugins
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/loaded_cluster_plugins file describes
the available plugins to support ocfs2 cluster operation.
A cluster plugin is required to use ocfs2 in a cluster.
There are currently two available plugins:
* 'o2cb' - The classic o2cb cluster stack that ocfs2 has
used since its inception.
* 'user' - A plugin supporting userspace cluster software
in conjunction with fs/dlm.
Reading from this file returns the names of all loaded
plugins, one per line.
This file is read-only. Its contents may change as
plugins are loaded or removed.
What: /sys/fs/ocfs2/active_cluster_plugin
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/active_cluster_plugin displays which
cluster plugin is currently in use by the filesystem.
The active plugin will appear in the loaded_cluster_plugins
file as well. Only one plugin can be used at a time.
Reading from this file returns the name of the active plugin
on a single line.
This file is read-only. Which plugin is active depends on
the cluster stack in use. The contents may change
when all filesystems are unmounted and the cluster stack
is changed.
What: /sys/fs/ocfs2/cluster_stack
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/cluster_stack file contains the name
of current ocfs2 cluster stack. This value is set by
userspace tools when bringing the cluster stack online.
Cluster stack names are 4 characters in length.
When the 'o2cb' cluster stack is used, the 'o2cb' cluster
plugin is active. All other cluster stacks use the 'user'
cluster plugin.
Reading from this file returns the name of the current
cluster stack on a single line.
Writing a new stack name to this file changes the current
cluster stack unless there are mounted ocfs2 filesystems.
If there are mounted filesystems, attempts to change the
stack return an error.
Users:
ocfs2-tools <ocfs2-tools-devel@oss.oracle.com>

5
Documentation/DocBook/Makefile
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@ -9,9 +9,10 @@
DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml videobook.xml \
kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
procfs-guide.xml writing_usb_driver.xml networking.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
mac80211.xml
###
# The build process is as follows (targets):

447
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@ -0,0 +1,447 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="kgdbOnLinux">
<bookinfo>
<title>Using kgdb and the kgdb Internals</title>
<authorgroup>
<author>
<firstname>Jason</firstname>
<surname>Wessel</surname>
<affiliation>
<address>
<email>jason.wessel@windriver.com</email>
</address>
</affiliation>
</author>
</authorgroup>
<authorgroup>
<author>
<firstname>Tom</firstname>
<surname>Rini</surname>
<affiliation>
<address>
<email>trini@kernel.crashing.org</email>
</address>
</affiliation>
</author>
</authorgroup>
<authorgroup>
<author>
<firstname>Amit S.</firstname>
<surname>Kale</surname>
<affiliation>
<address>
<email>amitkale@linsyssoft.com</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2008</year>
<holder>Wind River Systems, Inc.</holder>
</copyright>
<copyright>
<year>2004-2005</year>
<holder>MontaVista Software, Inc.</holder>
</copyright>
<copyright>
<year>2004</year>
<holder>Amit S. Kale</holder>
</copyright>
<legalnotice>
<para>
This file is licensed under the terms of the GNU General Public License
version 2. This program is licensed "as is" without any warranty of any
kind, whether express or implied.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="Introduction">
<title>Introduction</title>
<para>
kgdb is a source level debugger for linux kernel. It is used along
with gdb to debug a linux kernel. The expectation is that gdb can
be used to "break in" to the kernel to inspect memory, variables
and look through a cal stack information similar to what an
application developer would use gdb for. It is possible to place
breakpoints in kernel code and perform some limited execution
stepping.
</para>
<para>
Two machines are required for using kgdb. One of these machines is a
development machine and the other is a test machine. The kernel
to be debugged runs on the test machine. The development machine
runs an instance of gdb against the vmlinux file which contains
the symbols (not boot image such as bzImage, zImage, uImage...).
In gdb the developer specifies the connection parameters and
connects to kgdb. Depending on which kgdb I/O modules exist in
the kernel for a given architecture, it may be possible to debug
the test machine's kernel with the development machine using a
rs232 or ethernet connection.
</para>
</chapter>
<chapter id="CompilingAKernel">
<title>Compiling a kernel</title>
<para>
To enable <symbol>CONFIG_KGDB</symbol>, look under the "Kernel debugging"
and then select "KGDB: kernel debugging with remote gdb".
</para>
<para>
Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be
built into the kernel directly. Kgdb I/O driver configuration
takes place via kernel or module parameters, see following
chapter.
</para>
<para>
The kgdb test compile options are described in the kgdb test suite chapter.
</para>
</chapter>
<chapter id="EnableKGDB">
<title>Enable kgdb for debugging</title>
<para>
In order to use kgdb you must activate it by passing configuration
information to one of the kgdb I/O drivers. If you do not pass any
configuration information kgdb will not do anything at all. Kgdb
will only actively hook up to the kernel trap hooks if a kgdb I/O
driver is loaded and configured. If you unconfigure a kgdb I/O
driver, kgdb will unregister all the kernel hook points.
</para>
<para>
All drivers can be reconfigured at run time, if
<symbol>CONFIG_SYSFS</symbol> and <symbol>CONFIG_MODULES</symbol>
are enabled, by echo'ing a new config string to
<constant>/sys/module/&lt;driver&gt;/parameter/&lt;option&gt;</constant>.
The driver can be unconfigured by passing an empty string. You cannot
change the configuration while the debugger is attached. Make sure
to detach the debugger with the <constant>detach</constant> command
prior to trying unconfigure a kgdb I/O driver.
</para>
<sect1 id="kgdbwait">
<title>Kernel parameter: kgdbwait</title>
<para>
The Kernel command line option <constant>kgdbwait</constant> makes
kgdb wait for a debugger connection during booting of a kernel. You
can only use this option you compiled a kgdb I/O driver into the
kernel and you specified the I/O driver configuration as a kernel
command line option. The kgdbwait parameter should always follow the
configuration parameter for the kgdb I/O driver in the kernel
command line else the I/O driver will not be configured prior to
asking the kernel to use it to wait.
</para>
<para>
The kernel will stop and wait as early as the I/O driver and
architecture will allow when you use this option. If you build the
kgdb I/O driver as a kernel module kgdbwait will not do anything.
</para>
</sect1>
<sect1 id="kgdboc">
<title>Kernel parameter: kgdboc</title>
<para>
The kgdboc driver was originally an abbreviation meant to stand for
"kgdb over console". Kgdboc is designed to work with a single
serial port. It was meant to cover the circumstance
where you wanted to use a serial console as your primary console as
well as using it to perform kernel debugging. Of course you can
also use kgdboc without assigning a console to the same port.
</para>
<sect2 id="UsingKgdboc">
<title>Using kgdboc</title>
<para>
You can configure kgdboc via sysfs or a module or kernel boot line
parameter depending on if you build with CONFIG_KGDBOC as a module
or built-in.
<orderedlist>
<listitem><para>From the module load or build-in</para>
<para><constant>kgdboc=&lt;tty-device&gt;,[baud]</constant></para>
<para>
The example here would be if your console port was typically ttyS0, you would use something like <constant>kgdboc=ttyS0,115200</constant> or on the ARM Versatile AB you would likely use <constant>kgdboc=ttyAMA0,115200</constant>
</para>
</listitem>
<listitem><para>From sysfs</para>
<para><constant>echo ttyS0 &gt; /sys/module/kgdboc/parameters/kgdboc</constant></para>
</listitem>
</orderedlist>
</para>
<para>
NOTE: Kgdboc does not support interrupting the target via the
gdb remote protocol. You must manually send a sysrq-g unless you
have a proxy that splits console output to a terminal problem and
has a separate port for the debugger to connect to that sends the
sysrq-g for you.
</para>
<para>When using kgdboc with no debugger proxy, you can end up
connecting the debugger for one of two entry points. If an
exception occurs after you have loaded kgdboc a message should print
on the console stating it is waiting for the debugger. In case you
disconnect your terminal program and then connect the debugger in
its place. If you want to interrupt the target system and forcibly
enter a debug session you have to issue a Sysrq sequence and then
type the letter <constant>g</constant>. Then you disconnect the
terminal session and connect gdb. Your options if you don't like
this are to hack gdb to send the sysrq-g for you as well as on the
initial connect, or to use a debugger proxy that allows an
unmodified gdb to do the debugging.
</para>
</sect2>
</sect1>
<sect1 id="kgdbcon">
<title>Kernel parameter: kgdbcon</title>
<para>
Kgdb supports using the gdb serial protocol to send console messages
to the debugger when the debugger is connected and running. There
are two ways to activate this feature.
<orderedlist>
<listitem><para>Activate with the kernel command line option:</para>
<para><constant>kgdbcon</constant></para>
</listitem>
<listitem><para>Use sysfs before configuring an io driver</para>
<para>
<constant>echo 1 &gt; /sys/module/kgdb/parameters/kgdb_use_con</constant>
</para>
<para>
NOTE: If you do this after you configure the kgdb I/O driver, the
setting will not take effect until the next point the I/O is
reconfigured.
</para>
</listitem>
</orderedlist>
</para>
<para>
IMPORTANT NOTE: Using this option with kgdb over the console
(kgdboc) or kgdb over ethernet (kgdboe) is not supported.
</para>
</sect1>
</chapter>
<chapter id="ConnectingGDB">
<title>Connecting gdb</title>
<para>
If you are using kgdboc, you need to have used kgdbwait as a boot
argument, issued a sysrq-g, or the system you are going to debug
has already taken an exception and is waiting for the debugger to
attach before you can connect gdb.
</para>
<para>
If you are not using different kgdb I/O driver other than kgdboc,
you should be able to connect and the target will automatically
respond.
</para>
<para>
Example (using a serial port):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) set remotebaud 115200
(gdb) target remote /dev/ttyS0
</programlisting>
<para>
Example (kgdb to a terminal server):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) target remote udp:192.168.2.2:6443
</programlisting>
<para>
Example (kgdb over ethernet):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) target remote udp:192.168.2.2:6443
</programlisting>
<para>
Once connected, you can debug a kernel the way you would debug an
application program.
</para>
<para>
If you are having problems connecting or something is going
seriously wrong while debugging, it will most often be the case
that you want to enable gdb to be verbose about its target
communications. You do this prior to issuing the <constant>target
remote</constant> command by typing in: <constant>set remote debug 1</constant>
</para>
</chapter>
<chapter id="KGDBTestSuite">
<title>kgdb Test Suite</title>
<para>
When kgdb is enabled in the kernel config you can also elect to
enable the config parameter KGDB_TESTS. Turning this on will
enable a special kgdb I/O module which is designed to test the
kgdb internal functions.
</para>
<para>
The kgdb tests are mainly intended for developers to test the kgdb
internals as well as a tool for developing a new kgdb architecture
specific implementation. These tests are not really for end users
of the Linux kernel. The primary source of documentation would be
to look in the drivers/misc/kgdbts.c file.
</para>
<para>
The kgdb test suite can also be configured at compile time to run
the core set of tests by setting the kernel config parameter
KGDB_TESTS_ON_BOOT. This particular option is aimed at automated
regression testing and does not require modifying the kernel boot
config arguments. If this is turned on, the kgdb test suite can
be disabled by specifying "kgdbts=" as a kernel boot argument.
</para>
</chapter>
<chapter id="CommonBackEndReq">
<title>KGDB Internals</title>
<sect1 id="kgdbArchitecture">
<title>Architecture Specifics</title>
<para>
Kgdb is organized into three basic components:
<orderedlist>
<listitem><para>kgdb core</para>
<para>
The kgdb core is found in kernel/kgdb.c. It contains:
<itemizedlist>
<listitem><para>All the logic to implement the gdb serial protocol</para></listitem>
<listitem><para>A generic OS exception handler which includes sync'ing the processors into a stopped state on an multi cpu system.</para></listitem>
<listitem><para>The API to talk to the kgdb I/O drivers</para></listitem>
<listitem><para>The API to make calls to the arch specific kgdb implementation</para></listitem>
<listitem><para>The logic to perform safe memory reads and writes to memory while using the debugger</para></listitem>
<listitem><para>A full implementation for software breakpoints unless overridden by the arch</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem><para>kgdb arch specific implementation</para>
<para>
This implementation is generally found in arch/*/kernel/kgdb.c.
As an example, arch/x86/kernel/kgdb.c contains the specifics to
implement HW breakpoint as well as the initialization to
dynamically register and unregister for the trap handlers on
this architecture. The arch specific portion implements:
<itemizedlist>
<listitem><para>contains an arch specific trap catcher which
invokes kgdb_handle_exception() to start kgdb about doing its
work</para></listitem>
<listitem><para>translation to and from gdb specific packet format to pt_regs</para></listitem>
<listitem><para>Registration and unregistration of architecture specific trap hooks</para></listitem>
<listitem><para>Any special exception handling and cleanup</para></listitem>
<listitem><para>NMI exception handling and cleanup</para></listitem>
<listitem><para>(optional)HW breakpoints</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem><para>kgdb I/O driver</para>
<para>
Each kgdb I/O driver has to provide an implemenation for the following:
<itemizedlist>
<listitem><para>configuration via builtin or module</para></listitem>
<listitem><para>dynamic configuration and kgdb hook registration calls</para></listitem>
<listitem><para>read and write character interface</para></listitem>
<listitem><para>A cleanup handler for unconfiguring from the kgdb core</para></listitem>
<listitem><para>(optional) Early debug methodology</para></listitem>
</itemizedlist>
Any given kgdb I/O driver has to operate very closely with the
hardware and must do it in such a way that does not enable
interrupts or change other parts of the system context without
completely restoring them. The kgdb core will repeatedly "poll"
a kgdb I/O driver for characters when it needs input. The I/O
driver is expected to return immediately if there is no data
available. Doing so allows for the future possibility to touch
watch dog hardware in such a way as to have a target system not
reset when these are enabled.
</para>
</listitem>
</orderedlist>
</para>
<para>
If you are intent on adding kgdb architecture specific support
for a new architecture, the architecture should define
<constant>HAVE_ARCH_KGDB</constant> in the architecture specific
Kconfig file. This will enable kgdb for the architecture, and
at that point you must create an architecture specific kgdb
implementation.
</para>
<para>
There are a few flags which must be set on every architecture in
their &lt;asm/kgdb.h&gt; file. These are:
<itemizedlist>
<listitem>
<para>
NUMREGBYTES: The size in bytes of all of the registers, so
that we can ensure they will all fit into a packet.
</para>
<para>
BUFMAX: The size in bytes of the buffer GDB will read into.
This must be larger than NUMREGBYTES.
</para>
<para>
CACHE_FLUSH_IS_SAFE: Set to 1 if it is always safe to call
flush_cache_range or flush_icache_range. On some architectures,
these functions may not be safe to call on SMP since we keep other
CPUs in a holding pattern.
</para>
</listitem>
</itemizedlist>
</para>
<para>
There are also the following functions for the common backend,
found in kernel/kgdb.c, that must be supplied by the
architecture-specific backend unless marked as (optional), in
which case a default function maybe used if the architecture
does not need to provide a specific implementation.
</para>
!Iinclude/linux/kgdb.h
</sect1>
<sect1 id="kgdbocDesign">
<title>kgdboc internals</title>
<para>
The kgdboc driver is actually a very thin driver that relies on the
underlying low level to the hardware driver having "polling hooks"
which the to which the tty driver is attached. In the initial
implementation of kgdboc it the serial_core was changed to expose a
low level uart hook for doing polled mode reading and writing of a
single character while in an atomic context. When kgdb makes an I/O
request to the debugger, kgdboc invokes a call back in the serial
core which in turn uses the call back in the uart driver. It is
certainly possible to extend kgdboc to work with non-uart based
consoles in the future.
</para>
<para>
When using kgdboc with a uart, the uart driver must implement two callbacks in the <constant>struct uart_ops</constant>. Example from drivers/8250.c:<programlisting>
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = serial8250_get_poll_char,
.poll_put_char = serial8250_put_poll_char,
#endif
</programlisting>
Any implementation specifics around creating a polling driver use the
<constant>#ifdef CONFIG_CONSOLE_POLL</constant>, as shown above.
Keep in mind that polling hooks have to be implemented in such a way
that they can be called from an atomic context and have to restore
the state of the uart chip on return such that the system can return
to normal when the debugger detaches. You need to be very careful
with any kind of lock you consider, because failing here is most
going to mean pressing the reset button.
</para>
</sect1>
</chapter>
<chapter id="credits">
<title>Credits</title>
<para>
The following people have contributed to this document:
<orderedlist>
<listitem><para>Amit Kale<email>amitkale@linsyssoft.com</email></para></listitem>
<listitem><para>Tom Rini<email>trini@kernel.crashing.org</email></para></listitem>
</orderedlist>
In March 2008 this document was completely rewritten by:
<itemizedlist>
<listitem><para>Jason Wessel<email>jason.wessel@windriver.com</email></para></listitem>
</itemizedlist>
</para>
</chapter>
</book>

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="mac80211-developers-guide">
<bookinfo>
<title>The mac80211 subsystem for kernel developers</title>
<authorgroup>
<author>
<firstname>Johannes</firstname>
<surname>Berg</surname>
<affiliation>
<address><email>johannes@sipsolutions.net</email></address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2007</year>
<year>2008</year>
<holder>Johannes Berg</holder>
</copyright>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License version 2 as published by the Free Software Foundation.
</para>
<para>
This documentation is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this documentation; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
<abstract>
!Pinclude/net/mac80211.h Introduction
!Pinclude/net/mac80211.h Warning
</abstract>
</bookinfo>
<toc></toc>
<!--
Generally, this document shall be ordered by increasing complexity.
It is important to note that readers should be able to read only
the first few sections to get a working driver and only advanced
usage should require reading the full document.
-->
<part>
<title>The basic mac80211 driver interface</title>
<partintro>
<para>
You should read and understand the information contained
within this part of the book while implementing a driver.
In some chapters, advanced usage is noted, that may be
skipped at first.
</para>
<para>
This part of the book only covers station and monitor mode
functionality, additional information required to implement
the other modes is covered in the second part of the book.
</para>
</partintro>
<chapter id="basics">
<title>Basic hardware handling</title>
<para>TBD</para>
<para>
This chapter shall contain information on getting a hw
struct allocated and registered with mac80211.
</para>
<para>
Since it is required to allocate rates/modes before registering
a hw struct, this chapter shall also contain information on setting
up the rate/mode structs.
</para>
<para>
Additionally, some discussion about the callbacks and
the general programming model should be in here, including
the definition of ieee80211_ops which will be referred to
a lot.
</para>
<para>
Finally, a discussion of hardware capabilities should be done
with references to other parts of the book.
</para>
<!-- intentionally multiple !F lines to get proper order -->
!Finclude/net/mac80211.h ieee80211_hw
!Finclude/net/mac80211.h ieee80211_hw_flags
!Finclude/net/mac80211.h SET_IEEE80211_DEV
!Finclude/net/mac80211.h SET_IEEE80211_PERM_ADDR
!Finclude/net/mac80211.h ieee80211_ops
!Finclude/net/mac80211.h ieee80211_alloc_hw
!Finclude/net/mac80211.h ieee80211_register_hw
!Finclude/net/mac80211.h ieee80211_get_tx_led_name
!Finclude/net/mac80211.h ieee80211_get_rx_led_name
!Finclude/net/mac80211.h ieee80211_get_assoc_led_name
!Finclude/net/mac80211.h ieee80211_get_radio_led_name
!Finclude/net/mac80211.h ieee80211_unregister_hw
!Finclude/net/mac80211.h ieee80211_free_hw
</chapter>
<chapter id="phy-handling">
<title>PHY configuration</title>
<para>TBD</para>
<para>
This chapter should describe PHY handling including
start/stop callbacks and the various structures used.
</para>
!Finclude/net/mac80211.h ieee80211_conf
!Finclude/net/mac80211.h ieee80211_conf_flags
</chapter>
<chapter id="iface-handling">
<title>Virtual interfaces</title>
<para>TBD</para>
<para>
This chapter should describe virtual interface basics
that are relevant to the driver (VLANs, MGMT etc are not.)
It should explain the use of the add_iface/remove_iface
callbacks as well as the interface configuration callbacks.
</para>
<para>Things related to AP mode should be discussed there.</para>
<para>
Things related to supporting multiple interfaces should be
in the appropriate chapter, a BIG FAT note should be here about
this though and the recommendation to allow only a single
interface in STA mode at first!
</para>
!Finclude/net/mac80211.h ieee80211_if_types
!Finclude/net/mac80211.h ieee80211_if_init_conf
!Finclude/net/mac80211.h ieee80211_if_conf
</chapter>
<chapter id="rx-tx">
<title>Receive and transmit processing</title>
<sect1>
<title>what should be here</title>
<para>TBD</para>
<para>
This should describe the receive and transmit
paths in mac80211/the drivers as well as
transmit status handling.
</para>
</sect1>
<sect1>
<title>Frame format</title>
!Pinclude/net/mac80211.h Frame format
</sect1>
<sect1>
<title>Alignment issues</title>
<para>TBD</para>
</sect1>
<sect1>
<title>Calling into mac80211 from interrupts</title>
!Pinclude/net/mac80211.h Calling mac80211 from interrupts
</sect1>
<sect1>
<title>functions/definitions</title>
!Finclude/net/mac80211.h ieee80211_rx_status
!Finclude/net/mac80211.h mac80211_rx_flags
!Finclude/net/mac80211.h ieee80211_tx_control
!Finclude/net/mac80211.h ieee80211_tx_status_flags
!Finclude/net/mac80211.h ieee80211_rx
!Finclude/net/mac80211.h ieee80211_rx_irqsafe
!Finclude/net/mac80211.h ieee80211_tx_status
!Finclude/net/mac80211.h ieee80211_tx_status_irqsafe
!Finclude/net/mac80211.h ieee80211_rts_get
!Finclude/net/mac80211.h ieee80211_rts_duration
!Finclude/net/mac80211.h ieee80211_ctstoself_get
!Finclude/net/mac80211.h ieee80211_ctstoself_duration
!Finclude/net/mac80211.h ieee80211_generic_frame_duration
!Finclude/net/mac80211.h ieee80211_get_hdrlen_from_skb
!Finclude/net/mac80211.h ieee80211_get_hdrlen
!Finclude/net/mac80211.h ieee80211_wake_queue
!Finclude/net/mac80211.h ieee80211_stop_queue
!Finclude/net/mac80211.h ieee80211_start_queues
!Finclude/net/mac80211.h ieee80211_stop_queues
!Finclude/net/mac80211.h ieee80211_wake_queues
</sect1>
</chapter>
<chapter id="filters">
<title>Frame filtering</title>
!Pinclude/net/mac80211.h Frame filtering
!Finclude/net/mac80211.h ieee80211_filter_flags
</chapter>
</part>
<part id="advanced">
<title>Advanced driver interface</title>
<partintro>
<para>
Information contained within this part of the book is
of interest only for advanced interaction of mac80211
with drivers to exploit more hardware capabilities and
improve performance.
</para>
</partintro>
<chapter id="hardware-crypto-offload">
<title>Hardware crypto acceleration</title>
!Pinclude/net/mac80211.h Hardware crypto acceleration
<!-- intentionally multiple !F lines to get proper order -->
!Finclude/net/mac80211.h set_key_cmd
!Finclude/net/mac80211.h ieee80211_key_conf
!Finclude/net/mac80211.h ieee80211_key_alg
!Finclude/net/mac80211.h ieee80211_key_flags
</chapter>
<chapter id="qos">
<title>Multiple queues and QoS support</title>
<para>TBD</para>
!Finclude/net/mac80211.h ieee80211_tx_queue_params
!Finclude/net/mac80211.h ieee80211_tx_queue_stats_data
!Finclude/net/mac80211.h ieee80211_tx_queue
</chapter>
<chapter id="AP">
<title>Access point mode support</title>
<para>TBD</para>
<para>Some parts of the if_conf should be discussed here instead</para>
<para>
Insert notes about VLAN interfaces with hw crypto here or
in the hw crypto chapter.
</para>
!Finclude/net/mac80211.h ieee80211_get_buffered_bc
!Finclude/net/mac80211.h ieee80211_beacon_get
</chapter>
<chapter id="multi-iface">
<title>Supporting multiple virtual interfaces</title>
<para>TBD</para>
<para>
Note: WDS with identical MAC address should almost always be OK
</para>
<para>
Insert notes about having multiple virtual interfaces with
different MAC addresses here, note which configurations are
supported by mac80211, add notes about supporting hw crypto
with it.
</para>
</chapter>
<chapter id="hardware-scan-offload">
<title>Hardware scan offload</title>
<para>TBD</para>
!Finclude/net/mac80211.h ieee80211_scan_completed
</chapter>
</part>
<part id="rate-control">
<title>Rate control interface</title>
<partintro>
<para>TBD</para>
<para>
This part of the book describes the rate control algorithm
interface and how it relates to mac80211 and drivers.
</para>
</partintro>
<chapter id="dummy">
<title>dummy chapter</title>
<para>TBD</para>
</chapter>
</part>
<part id="internal">
<title>Internals</title>
<partintro>
<para>TBD</para>
<para>
This part of the book describes mac80211 internals.
</para>
</partintro>
<chapter id="key-handling">
<title>Key handling</title>
<sect1>
<title>Key handling basics</title>
!Pnet/mac80211/key.c Key handling basics
</sect1>
<sect1>
<title>MORE TBD</title>
<para>TBD</para>
</sect1>
</chapter>
<chapter id="rx-processing">
<title>Receive processing</title>
<para>TBD</para>
</chapter>
<chapter id="tx-processing">
<title>Transmit processing</title>
<para>TBD</para>
</chapter>
<chapter id="sta-info">
<title>Station info handling</title>
<sect1>
<title>Programming information</title>
!Fnet/mac80211/sta_info.h sta_info
!Fnet/mac80211/sta_info.h ieee80211_sta_info_flags
</sect1>
<sect1>
<title>STA information lifetime rules</title>
!Pnet/mac80211/sta_info.c STA information lifetime rules
</sect1>
</chapter>
<chapter id="synchronisation">
<title>Synchronisation</title>
<para>TBD</para>
<para>Locking, lots of RCU</para>
</chapter>
</part>
</book>

16
Documentation/debugging-via-ohci1394.txt
View File

@ -41,15 +41,19 @@ to a working state and enables physical DMA by default for all remote nodes.
This can be turned off by ohci1394's module parameter phys_dma=0.
The alternative firewire-ohci driver in drivers/firewire uses filtered physical
DMA, hence is not yet suitable for remote debugging.
DMA by default, which is more secure but not suitable for remote debugging.
Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu:
Remote debugging over FireWire with firewire-ohci) to get unfiltered physical
DMA.
Because ohci1394 depends on the PCI enumeration to be completed, an
initialization routine which runs pretty early (long before console_init()
which makes the printk buffer appear on the console can be called) was written.
Because ohci1394 and firewire-ohci depend on the PCI enumeration to be
completed, an initialization routine which runs pretty early has been
implemented for x86. This routine runs long before console_init() can be
called, i.e. before the printk buffer appears on the console.
To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu:
Provide code for enabling DMA over FireWire early on boot) and pass the
parameter "ohci1394_dma=early" to the recompiled kernel on boot.
Remote debugging over FireWire early on boot) and pass the parameter
"ohci1394_dma=early" to the recompiled kernel on boot.
Tools
-----

49
Documentation/feature-removal-schedule.txt
View File

@ -203,16 +203,8 @@ Who: linuxppc-dev@ozlabs.org
---------------------------
What: sk98lin network driver
When: Feburary 2008
Why: In kernel tree version of driver is unmaintained. Sk98lin driver
replaced by the skge driver.
Who: Stephen Hemminger <shemminger@linux-foundation.org>
---------------------------
What: i386/x86_64 bzImage symlinks
When: April 2008
When: April 2010
Why: The i386/x86_64 merge provides a symlink to the old bzImage
location so not yet updated user space tools, e.g. package
@ -221,8 +213,6 @@ Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
---------------------------
What: i2c-i810, i2c-prosavage and i2c-savage4
When: May 2008
Why: These drivers are superseded by i810fb, intelfb and savagefb.
@ -230,33 +220,6 @@ Who: Jean Delvare <khali@linux-fr.org>
---------------------------
What: bcm43xx wireless network driver
When: 2.6.26
Files: drivers/net/wireless/bcm43xx
Why: This driver's functionality has been replaced by the
mac80211-based b43 and b43legacy drivers.
Who: John W. Linville <linville@tuxdriver.com>
---------------------------
What: ieee80211 softmac wireless networking component
When: 2.6.26 (or after removal of bcm43xx and port of zd1211rw to mac80211)
Files: net/ieee80211/softmac
Why: No in-kernel drivers will depend on it any longer.
Who: John W. Linville <linville@tuxdriver.com>
---------------------------
What: rc80211-simple rate control algorithm for mac80211
When: 2.6.26
Files: net/mac80211/rc80211-simple.c
Why: This algorithm was provided for reference but always exhibited bad
responsiveness and performance and has some serious flaws. It has been
replaced by rc80211-pid.
Who: Stefano Brivio <stefano.brivio@polimi.it>
---------------------------
What (Why):
- include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files
(superseded by xt_TOS/xt_tos target & match)
@ -318,3 +281,13 @@ Why: Not used in-tree. The current out-of-tree users used it to
code / infrastructure should be in the kernel and not in some
out-of-tree driver.
Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
What: /sys/o2cb symlink
When: January 2010
Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb
exists as a symlink for backwards compatibility for old versions of
ocfs2-tools. 2 years should be sufficient time to phase in new versions
which know to look in /sys/fs/o2cb.
Who: ocfs2-devel@oss.oracle.com

6
Documentation/filesystems/seq_file.txt
View File

@ -92,7 +92,7 @@ implementations; in most cases the start() function should check for a
"past end of file" condition and return NULL if need be.
For more complicated applications, the private field of the seq_file
structure can be used. There is also a special value whch can be returned
structure can be used. There is also a special value which can be returned
by the start() function called SEQ_START_TOKEN; it can be used if you wish
to instruct your show() function (described below) to print a header at the
top of the output. SEQ_START_TOKEN should only be used if the offset is
@ -146,7 +146,7 @@ the four functions we have just defined:
This structure will be needed to tie our iterator to the /proc file in
a little bit.
It's worth noting that the interator value returned by start() and
It's worth noting that the iterator value returned by start() and
manipulated by the other functions is considered to be completely opaque by
the seq_file code. It can thus be anything that is useful in stepping
through the data to be output. Counters can be useful, but it could also be
@ -262,7 +262,7 @@ routines useful:
These helpers will interpret pos as a position within the list and iterate
accordingly. Your start() and next() functions need only invoke the
seq_list_* helpers with a pointer to the appropriate list_head structure.
seq_list_* helpers with a pointer to the appropriate list_head structure.
The extra-simple version

15
Documentation/filesystems/xfs.txt
View File

@ -52,16 +52,15 @@ When mounting an XFS filesystem, the following options are accepted.
and also gets the setgid bit set if it is a directory itself.
ihashsize=value
Sets the number of hash buckets available for hashing the
in-memory inodes of the specified mount point. If a value
of zero is used, the value selected by the default algorithm
will be displayed in /proc/mounts.
In memory inode hashes have been removed, so this option has
no function as of August 2007. Option is deprecated.
ikeep/noikeep
When inode clusters are emptied of inodes, keep them around
on the disk (ikeep) - this is the traditional XFS behaviour
and is still the default for now. Using the noikeep option,
inode clusters are returned to the free space pool.
When ikeep is specified, XFS does not delete empty inode clusters
and keeps them around on disk. ikeep is the traditional XFS
behaviour. When noikeep is specified, empty inode clusters
are returned to the free space pool. The default is noikeep for
non-DMAPI mounts, while ikeep is the default when DMAPI is in use.
inode64
Indicates that XFS is allowed to create inodes at any location

28
Documentation/i386/boot.txt
View File

@ -170,6 +170,8 @@ Offset Proto Name Meaning
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
0248/4 2.08+ payload_offset Offset of kernel payload
024C/4 2.08+ payload_length Length of kernel payload
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
@ -512,6 +514,32 @@ Protocol: 2.07+
A pointer to data that is specific to hardware subarch
Field name: payload_offset
Type: read
Offset/size: 0x248/4
Protocol: 2.08+
If non-zero then this field contains the offset from the end of the
real-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
numbers. Currently only gzip compressed ELF is used.
Field name: payload_length
Type: read
Offset/size: 0x24c/4
Protocol: 2.08+
The length of the payload.
**** THE IMAGE CHECKSUM
From boot protocol version 2.08 onwards the CRC-32 is calculated over
the entire file using the characteristic polynomial 0x04C11DB7 and an
initial remainder of 0xffffffff. The checksum is appended to the
file; therefore the CRC of the file up to the limit specified in the
syssize field of the header is always 0.
**** THE KERNEL COMMAND LINE

47
Documentation/ide/ide.txt
View File

@ -71,29 +71,6 @@ This driver automatically probes for most IDE interfaces (including all PCI
ones), for the drives/geometries attached to those interfaces, and for the IRQ
lines being used by the interfaces (normally 14, 15 for ide0/ide1).
For special cases, interfaces may be specified using kernel "command line"
options. For example,
ide3=0x168,0x36e,10 /* ioports 0x168-0x16f,0x36e, irq 10 */
Normally the irq number need not be specified, as ide.c will probe for it:
ide3=0x168,0x36e /* ioports 0x168-0x16f,0x36e */
The standard port, and irq values are these:
ide0=0x1f0,0x3f6,14
ide1=0x170,0x376,15
ide2=0x1e8,0x3ee,11
ide3=0x168,0x36e,10
Note that the first parameter reserves 8 contiguous ioports, whereas the
second value denotes a single ioport. If in doubt, do a 'cat /proc/ioports'.
In all probability the device uses these ports and IRQs if it is attached
to the appropriate ide channel. Pass the parameter for the correct ide
channel to the kernel, as explained above.
Any number of interfaces may share a single IRQ if necessary, at a slight
performance penalty, whether on separate cards or a single VLB card.
The IDE driver automatically detects and handles this. However, this may
@ -184,13 +161,6 @@ provided it is mounted with the default block size of 1024 (as above).
Please pass on any feedback on any of this stuff to the maintainer,
whose address can be found in linux/MAINTAINERS.
Note that if BOTH hd.c and ide.c are configured into the kernel,
hd.c will normally be allowed to control the primary IDE interface.
This is useful for older hardware that may be incompatible with ide.c,
and still allows newer hardware to run on the 2nd/3rd/4th IDE ports
under control of ide.c. To have ide.c also "take over" the primary
IDE port in this situation, use the "command line" parameter: ide0=0x1f0
The IDE driver is modularized. The high level disk/CD-ROM/tape/floppy
drivers can always be compiled as loadable modules, the chipset drivers
can only be compiled into the kernel, and the core code (ide.c) can be
@ -206,7 +176,7 @@ When ide.c is used as a module, you can pass command line parameters to the
driver using the "options=" keyword to insmod, while replacing any ',' with
';'. For example:
insmod ide.o options="ide0=serialize ide1=serialize ide2=0x1e8;0x3ee;11"
insmod ide.o options="hda=nodma hdb=nodma"
================================================================================
@ -247,21 +217,11 @@ Summary of ide driver parameters for kernel command line
As for VLB, it is safest to not specify it.
Bigger values are safer than smaller ones.
"idex=base" : probe for an interface at the addr specified,
where "base" is usually 0x1f0 or 0x170
and "ctl" is assumed to be "base"+0x206
"idex=base,ctl" : specify both base and ctl
"idex=base,ctl,irq" : specify base, ctl, and irq number
"idex=serialize" : do not overlap operations on idex. Please note
that you will have to specify this option for
both the respective primary and secondary channel
to take effect.
"idex=four" : four drives on idex and ide(x^1) share same ports
"idex=reset" : reset interface after probe
"idex=ata66" : informs the interface that it has an 80c cable
@ -269,8 +229,6 @@ Summary of ide driver parameters for kernel command line
ability to bit test for detection is currently
unknown.
"ide=reverse" : formerly called to pci sub-system, but now local.
"ide=doubler" : probe/support IDE doublers on Amiga
There may be more options than shown -- use the source, Luke!
@ -290,6 +248,9 @@ Also for legacy CMD640 host driver (cmd640) you need to use "probe_vlb"
kernel paremeter to enable probing for VLB version of the chipset (PCI ones
are detected automatically).
You also need to use "probe" kernel parameter for ide-4drives driver
(support for IDE generic chipset with four drives on one port).
================================================================================
Some Terminology

13
Documentation/ide/warm-plug-howto.txt Normal file
View File

@ -0,0 +1,13 @@
IDE warm-plug HOWTO
===================
To warm-plug devices on a port 'idex':
# echo -n "1" > /sys/class/ide_port/idex/delete_devices
unplug old device(s) and plug new device(s)
# echo -n "1" > /sys/class/ide_port/idex/scan
done

37
Documentation/kernel-parameters.txt
View File

@ -366,6 +366,12 @@ and is between 256 and 4096 characters. It is defined in the file
possible to determine what the correct size should be.
This option provides an override for these situations.
security= [SECURITY] Choose a security module to enable at boot.
If this boot parameter is not specified, only the first
security module asking for security registration will be
loaded. An invalid security module name will be treated
as if no module has been chosen.
capability.disable=
[SECURITY] Disable capabilities. This would normally
be used only if an alternative security model is to be
@ -763,11 +769,11 @@ and is between 256 and 4096 characters. It is defined in the file
Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
ide= [HW] (E)IDE subsystem
Format: ide=nodma or ide=doubler or ide=reverse
Format: ide=nodma or ide=doubler
See Documentation/ide/ide.txt.
ide?= [HW] (E)IDE subsystem
Format: ide?=noprobe or chipset specific parameters.
Format: ide?=ata66 or chipset specific parameters.
See Documentation/ide/ide.txt.
idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
@ -812,6 +818,19 @@ and is between 256 and 4096 characters. It is defined in the file
inttest= [IA64]
iommu= [x86]
off
force
noforce
biomerge
panic
nopanic
merge
nomerge
forcesac
soft
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
off
Disable intel iommu driver.
@ -928,6 +947,11 @@ and is between 256 and 4096 characters. It is defined in the file
kstack=N [X86-32,X86-64] Print N words from the kernel stack
in oops dumps.
kgdboc= [HW] kgdb over consoles.
Requires a tty driver that supports console polling.
(only serial suported for now)
Format: <serial_device>[,baud]
l2cr= [PPC]
lapic [X86-32,APIC] Enable the local APIC even if BIOS
@ -1134,6 +1158,11 @@ and is between 256 and 4096 characters. It is defined in the file
or
memmap=0x10000$0x18690000
memtest= [KNL,X86_64] Enable memtest
Format: <integer>
range: 0,4 : pattern number
default : 0 <disable>
meye.*= [HW] Set MotionEye Camera parameters
See Documentation/video4linux/meye.txt.
@ -1339,6 +1368,10 @@ and is between 256 and 4096 characters. It is defined in the file
nowb [ARM]
nptcg= [IA64] Override max number of concurrent global TLB
purges which is reported from either PAL_VM_SUMMARY or
SAL PALO.
numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
one of ['zone', 'node', 'default'] can be specified
This can be set from sysctl after boot.

2
Documentation/laptops/acer-wmi.txt
View File

@ -80,7 +80,7 @@ once you enable the radio, will depend on your hardware and driver combination.
e.g. With the BCM4318 on the Acer Aspire 5020 series:
ndiswrapper: Light blinks on when transmitting
bcm43xx/b43: Solid light, blinks off when transmitting
b43: Solid light, blinks off when transmitting
Wireless radio control is unconditionally enabled - all Acer laptops that support
acer-wmi come with built-in wireless. However, should you feel so inclined to

2
Documentation/networking/00-INDEX
View File

@ -100,8 +100,6 @@ tuntap.txt
- TUN/TAP device driver, allowing user space Rx/Tx of packets.
vortex.txt
- info on using 3Com Vortex (3c590, 3c592, 3c595, 3c597) Ethernet cards.
wan-router.txt
- WAN router documentation
wavelan.txt
- AT&T GIS (nee NCR) WaveLAN card: An Ethernet-like radio transceiver
x25.txt

89
Documentation/networking/bcm43xx.txt
View File

@ -1,89 +0,0 @@
BCM43xx Linux Driver Project
============================
Introduction
------------
Many of the wireless devices found in modern notebook computers are
based on the wireless chips produced by Broadcom. These devices have
been a problem for Linux users as there is no open-source driver
available. In addition, Broadcom has not released specifications
for the device, and driver availability has been limited to the
binary-only form used in the GPL versions of AP hardware such as the
Linksys WRT54G, and the Windows and OS X drivers. Before this project
began, the only way to use these devices were to use the Windows or
OS X drivers with either the Linuxant or ndiswrapper modules. There
is a strong penalty if this method is used as loading the binary-only
module "taints" the kernel, and no kernel developer will help diagnose
any kernel problems.
Development
-----------
This driver has been developed using
a clean-room technique that is described at
http://bcm-specs.sipsolutions.net/ReverseEngineeringProcess. For legal
reasons, none of the clean-room crew works on the on the Linux driver,
and none of the Linux developers sees anything but the specifications,
which are the ultimate product of the reverse-engineering group.
Software
--------
Since the release of the 2.6.17 kernel, the bcm43xx driver has been
distributed with the kernel source, and is prebuilt in most, if not
all, distributions. There is, however, additional software that is
required. The firmware used by the chip is the intellectual property
of Broadcom and they have not given the bcm43xx team redistribution
rights to this firmware. Since we cannot legally redistribute
the firmware we cannot include it with the driver. Furthermore, it
cannot be placed in the downloadable archives of any distributing
organization; therefore, the user is responsible for obtaining the
firmware and placing it in the appropriate location so that the driver
can find it when initializing.
To help with this process, the bcm43xx developers provide a separate
program named bcm43xx-fwcutter to "cut" the firmware out of a
Windows or OS X driver and write the extracted files to the proper
location. This program is usually provided with the distribution;
however, it may be downloaded from
http://developer.berlios.de/project/showfiles.php?group_id=4547
The firmware is available in two versions. V3 firmware is used with
the in-kernel bcm43xx driver that uses a software MAC layer called
SoftMAC, and will have a microcode revision of 0x127 or smaller. The
V4 firmware is used by an out-of-kernel driver employing a variation of
the Devicescape MAC layer known as d80211. Once bcm43xx-d80211 reaches
a satisfactory level of development, it will replace bcm43xx-softmac
in the kernel as it is much more flexible and powerful.
A source for the latest V3 firmware is
http://downloads.openwrt.org/sources/wl_apsta-3.130.20.0.o
Once this file is downloaded, the command
'bcm43xx-fwcutter -w <dir> <filename>'
will extract the microcode and write it to directory
<dir>. The correct directory will depend on your distribution;
however, most use '/lib/firmware'. Once this step is completed,
the bcm3xx driver should load when the system is booted. To see
any messages relating to the driver, issue the command 'dmesg |
grep bcm43xx' from a terminal window. If there are any problems,
please send that output to Bcm43xx-dev@lists.berlios.de.
Although the driver has been in-kernel since 2.6.17, the earliest
version is quite limited in its capability. Patches that include
all features of later versions are available for the stable kernel
versions from 2.6.18. These will be needed if you use a BCM4318,
or a PCI Express version (BCM4311 and BCM4312). In addition, if you
have an early BCM4306 and more than 1 GB RAM, your kernel will need
to be patched. These patches, which are being updated regularly,
are available at ftp://lwfinger.dynalias.org/patches. Look for
combined_2.6.YY.patch. Of course you will need kernel source downloaded
from kernel.org, or the source from your distribution.
If you build your own kernel, please enable CONFIG_BCM43XX_DEBUG
and CONFIG_IEEE80211_SOFTMAC_DEBUG. The log information provided is
essential for solving any problems.

8
Documentation/networking/can.txt
View File

@ -281,10 +281,10 @@ solution for a couple of reasons:
sa_family_t can_family;
int can_ifindex;
union {
struct { canid_t rx_id, tx_id; } tp16;
struct { canid_t rx_id, tx_id; } tp20;
struct { canid_t rx_id, tx_id; } mcnet;
struct { canid_t rx_id, tx_id; } isotp;
/* transport protocol class address info (e.g. ISOTP) */
struct { canid_t rx_id, tx_id; } tp;
/* reserved for future CAN protocols address information */
} can_addr;
};

621
Documentation/networking/wan-router.txt
View File

@ -1,621 +0,0 @@
------------------------------------------------------------------------------
Linux WAN Router Utilities Package
------------------------------------------------------------------------------
Version 2.2.1
Mar 28, 2001
Author: Nenad Corbic <ncorbic@sangoma.com>
Copyright (c) 1995-2001 Sangoma Technologies Inc.
------------------------------------------------------------------------------
INTRODUCTION
Wide Area Networks (WANs) are used to interconnect Local Area Networks (LANs)
and/or stand-alone hosts over vast distances with data transfer rates
significantly higher than those achievable with commonly used dial-up
connections.
Usually an external device called `WAN router' sitting on your local network
or connected to your machine's serial port provides physical connection to
WAN. Although router's job may be as simple as taking your local network
traffic, converting it to WAN format and piping it through the WAN link, these
devices are notoriously expensive, with prices as much as 2 - 5 times higher
then the price of a typical PC box.
Alternatively, considering robustness and multitasking capabilities of Linux,
an internal router can be built (most routers use some sort of stripped down
Unix-like operating system anyway). With a number of relatively inexpensive WAN
interface cards available on the market, a perfectly usable router can be
built for less than half a price of an external router. Yet a Linux box
acting as a router can still be used for other purposes, such as fire-walling,
running FTP, WWW or DNS server, etc.
This kernel module introduces the notion of a WAN Link Driver (WLD) to Linux
operating system and provides generic hardware-independent services for such
drivers. Why can existing Linux network device interface not be used for
this purpose? Well, it can. However, there are a few key differences between
a typical network interface (e.g. Ethernet) and a WAN link.
Many WAN protocols, such as X.25 and frame relay, allow for multiple logical
connections (known as `virtual circuits' in X.25 terminology) over a single
physical link. Each such virtual circuit may (and almost always does) lead
to a different geographical location and, therefore, different network. As a
result, it is the virtual circuit, not the physical link, that represents a
route and, therefore, a network interface in Linux terms.
To further complicate things, virtual circuits are usually volatile in nature
(excluding so called `permanent' virtual circuits or PVCs). With almost no
time required to set up and tear down a virtual circuit, it is highly desirable
to implement on-demand connections in order to minimize network charges. So
unlike a typical network driver, the WAN driver must be able to handle multiple
network interfaces and cope as multiple virtual circuits come into existence
and go away dynamically.
Last, but not least, WAN configuration is much more complex than that of say
Ethernet and may well amount to several dozens of parameters. Some of them
are "link-wide" while others are virtual circuit-specific. The same holds
true for WAN statistics which is by far more extensive and extremely useful
when troubleshooting WAN connections. Extending the ifconfig utility to suit
these needs may be possible, but does not seem quite reasonable. Therefore, a
WAN configuration utility and corresponding application programmer's interface
is needed for this purpose.
Most of these problems are taken care of by this module. Its goal is to
provide a user with more-or-less standard look and feel for all WAN devices and
assist a WAN device driver writer by providing common services, such as:
o User-level interface via /proc file system
o Centralized configuration
o Device management (setup, shutdown, etc.)
o Network interface management (dynamic creation/destruction)
o Protocol encapsulation/decapsulation
To ba able to use the Linux WAN Router you will also need a WAN Tools package
available from
ftp.sangoma.com/pub/linux/current_wanpipe/wanpipe-X.Y.Z.tgz
where vX.Y.Z represent the wanpipe version number.
For technical questions and/or comments please e-mail to ncorbic@sangoma.com.
For general inquiries please contact Sangoma Technologies Inc. by
Hotline: 1-800-388-2475 (USA and Canada, toll free)
Phone: (905) 474-1990 ext: 106
Fax: (905) 474-9223
E-mail: dm@sangoma.com (David Mandelstam)
WWW: http://www.sangoma.com
INSTALLATION
Please read the WanpipeForLinux.pdf manual on how to
install the WANPIPE tools and drivers properly.
After installing wanpipe package: /usr/local/wanrouter/doc.
On the ftp.sangoma.com : /linux/current_wanpipe/doc
COPYRIGHT AND LICENSING INFORMATION
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 675 Mass
Ave, Cambridge, MA 02139, USA.
ACKNOWLEDGEMENTS
This product is based on the WANPIPE(tm) Multiprotocol WAN Router developed
by Sangoma Technologies Inc. for Linux 2.0.x and 2.2.x. Success of the WANPIPE
together with the next major release of Linux kernel in summer 1996 commanded
adequate changes to the WANPIPE code to take full advantage of new Linux
features.
Instead of continuing developing proprietary interface tied to Sangoma WAN
cards, we decided to separate all hardware-independent code into a separate
module and defined two levels of interfaces - one for user-level applications
and another for kernel-level WAN drivers. WANPIPE is now implemented as a
WAN driver compliant with the WAN Link Driver interface. Also a general
purpose WAN configuration utility and a set of shell scripts was developed to
support WAN router at the user level.
Many useful ideas concerning hardware-independent interface implementation
were given by Mike McLagan <mike.mclagan@linux.org> and his implementation
of the Frame Relay router and drivers for Sangoma cards (dlci/sdla).
With the new implementation of the APIs being incorporated into the WANPIPE,
a special thank goes to Alan Cox in providing insight into BSD sockets.
Special thanks to all the WANPIPE users who performed field-testing, reported
bugs and made valuable comments and suggestions that help us to improve this
product.
NEW IN THIS RELEASE
o Updated the WANCFG utility
Calls the pppconfig to configure the PPPD
for async connections.
o Added the PPPCONFIG utility
Used to configure the PPPD daemon for the
WANPIPE Async PPP and standard serial port.
The wancfg calls the pppconfig to configure
the pppd.
o Fixed the PCI autodetect feature.
The SLOT 0 was used as an autodetect option
however, some high end PC's slot numbers start
from 0.
o This release has been tested with the new backupd
daemon release.
PRODUCT COMPONENTS AND RELATED FILES
/etc: (or user defined)
wanpipe1.conf default router configuration file
/lib/modules/X.Y.Z/misc:
wanrouter.o router kernel loadable module
af_wanpipe.o wanpipe api socket module
/lib/modules/X.Y.Z/net:
sdladrv.o Sangoma SDLA support module
wanpipe.o Sangoma WANPIPE(tm) driver module
/proc/net/wanrouter
Config reads current router configuration
Status reads current router status
{name} reads WAN driver statistics
/usr/sbin:
wanrouter wanrouter start-up script
wanconfig wanrouter configuration utility
sdladump WANPIPE adapter memory dump utility
fpipemon Monitor for Frame Relay
cpipemon Monitor for Cisco HDLC
ppipemon Monitor for PPP
xpipemon Monitor for X25
wpkbdmon WANPIPE keyboard led monitor/debugger
/usr/local/wanrouter:
README this file
COPYING GNU General Public License
Setup installation script
Filelist distribution definition file
wanrouter.rc meta-configuration file
(used by the Setup and wanrouter script)
/usr/local/wanrouter/doc:
wanpipeForLinux.pdf WAN Router User's Manual
/usr/local/wanrouter/patches:
wanrouter-v2213.gz patch for Linux kernels 2.2.11 up to 2.2.13.
wanrouter-v2214.gz patch for Linux kernel 2.2.14.
wanrouter-v2215.gz patch for Linux kernels 2.2.15 to 2.2.17.
wanrouter-v2218.gz patch for Linux kernels 2.2.18 and up.
wanrouter-v240.gz patch for Linux kernel 2.4.0.
wanrouter-v242.gz patch for Linux kernel 2.4.2 and up.
wanrouter-v2034.gz patch for Linux kernel 2.0.34
wanrouter-v2036.gz patch for Linux kernel 2.0.36 and up.
/usr/local/wanrouter/patches/kdrivers:
Sources of the latest WANPIPE device drivers.
These are used to UPGRADE the linux kernel to the newest
version if the kernel source has already been patched with
WANPIPE drivers.
/usr/local/wanrouter/samples:
interface sample interface configuration file
wanpipe1.cpri CHDLC primary port
wanpipe2.csec CHDLC secondary port
wanpipe1.fr Frame Relay protocol
wanpipe1.ppp PPP protocol )
wanpipe1.asy CHDLC ASYNC protocol
wanpipe1.x25 X25 protocol
wanpipe1.stty Sync TTY driver (Used by Kernel PPPD daemon)
wanpipe1.atty Async TTY driver (Used by Kernel PPPD daemon)
wanrouter.rc sample meta-configuration file
/usr/local/wanrouter/util:
* wan-tools utilities source code
/usr/local/wanrouter/api/x25:
* x25 api sample programs.
/usr/local/wanrouter/api/chdlc:
* chdlc api sample programs.
/usr/local/wanrouter/api/fr:
* fr api sample programs.
/usr/local/wanrouter/config/wancfg:
wancfg WANPIPE GUI configuration program.
Creates wanpipe#.conf files.
/usr/local/wanrouter/config/cfgft1:
cfgft1 GUI CSU/DSU configuration program.
/usr/include/linux:
wanrouter.h router API definitions
wanpipe.h WANPIPE API definitions
sdladrv.h SDLA support module API definitions
sdlasfm.h SDLA firmware module definitions
if_wanpipe.h WANPIPE Socket definitions
sdlapci.h WANPIPE PCI definitions
/usr/src/linux/net/wanrouter:
* wanrouter source code
/var/log:
wanrouter wanrouter start-up log (created by the Setup script)
/var/lock: (or /var/lock/subsys for RedHat)
wanrouter wanrouter lock file (created by the Setup script)
/usr/local/wanrouter/firmware:
fr514.sfm Frame relay firmware for Sangoma S508/S514 card
cdual514.sfm Dual Port Cisco HDLC firmware for Sangoma S508/S514 card
ppp514.sfm PPP Firmware for Sangoma S508 and S514 cards
x25_508.sfm X25 Firmware for Sangoma S508 card.
REVISION HISTORY
1.0.0 December 31, 1996 Initial version
1.0.1 January 30, 1997 Status and statistics can be read via /proc
filesystem entries.
1.0.2 April 30, 1997 Added UDP management via monitors.
1.0.3 June 3, 1997 UDP management for multiple boards using Frame
Relay and PPP
Enabled continuous transmission of Configure
Request Packet for PPP (for 508 only)
Connection Timeout for PPP changed from 900 to 0
Flow Control Problem fixed for Frame Relay
1.0.4 July 10, 1997 S508/FT1 monitoring capability in fpipemon and
ppipemon utilities.
Configurable TTL for UDP packets.
Multicast and Broadcast IP source addresses are
silently discarded.
1.0.5 July 28, 1997 Configurable T391,T392,N391,N392,N393 for Frame
Relay in router.conf.
Configurable Memory Address through router.conf
for Frame Relay, PPP and X.25. (commenting this
out enables auto-detection).
Fixed freeing up received buffers using kfree()
for Frame Relay and X.25.
Protect sdla_peek() by calling save_flags(),
cli() and restore_flags().
Changed number of Trace elements from 32 to 20
Added DLCI specific data monitoring in FPIPEMON.
2.0.0 Nov 07, 1997 Implemented protection of RACE conditions by
critical flags for FRAME RELAY and PPP.
DLCI List interrupt mode implemented.
IPX support in FRAME RELAY and PPP.
IPX Server Support (MARS)
More driver specific stats included in FPIPEMON
and PIPEMON.
2.0.1 Nov 28, 1997 Bug Fixes for version 2.0.0.
Protection of "enable_irq()" while
"disable_irq()" has been enabled from any other
routine (for Frame Relay, PPP and X25).
Added additional Stats for Fpipemon and Ppipemon
Improved Load Sharing for multiple boards
2.0.2 Dec 09, 1997 Support for PAP and CHAP for ppp has been
implemented.
2.0.3 Aug 15, 1998 New release supporting Cisco HDLC, CIR for Frame
relay, Dynamic IP assignment for PPP and Inverse
Arp support for Frame-relay. Man Pages are
included for better support and a new utility
for configuring FT1 cards.
2.0.4 Dec 09, 1998 Dual Port support for Cisco HDLC.
Support for HDLC (LAPB) API.
Supports BiSync Streaming code for S502E
and S503 cards.
Support for Streaming HDLC API.
Provides a BSD socket interface for
creating applications using BiSync
streaming.
2.0.5 Aug 04, 1999 CHDLC initialization bug fix.
PPP interrupt driven driver:
Fix to the PPP line hangup problem.
New PPP firmware
Added comments to the startup SYSTEM ERROR messages
Xpipemon debugging application for the X25 protocol
New USER_MANUAL.txt
Fixed the odd boundary 4byte writes to the board.
BiSync Streaming code has been taken out.
Available as a patch.
Streaming HDLC API has been taken out.
Available as a patch.
2.0.6 Aug 17, 1999 Increased debugging in statup scripts
Fixed installation bugs from 2.0.5
Kernel patch works for both 2.2.10 and 2.2.11 kernels.
There is no functional difference between the two packages
2.0.7 Aug 26, 1999 o Merged X25API code into WANPIPE.
o Fixed a memory leak for X25API
o Updated the X25API code for 2.2.X kernels.
o Improved NEM handling.
2.1.0 Oct 25, 1999 o New code for S514 PCI Card
o New CHDLC and Frame Relay drivers
o PPP and X25 are not supported in this release
2.1.1 Nov 30, 1999 o PPP support for S514 PCI Cards
2.1.3 Apr 06, 2000 o Socket based x25api
o Socket based chdlc api
o Socket based fr api
o Dual Port Receive only CHDLC support.
o Asynchronous CHDLC support (Secondary Port)
o cfgft1 GUI csu/dsu configurator
o wancfg GUI configuration file
configurator.
o Architectural directory changes.
beta-2.1.4 Jul 2000 o Dynamic interface configuration:
Network interfaces reflect the state
of protocol layer. If the protocol becomes
disconnected, driver will bring down
the interface. Once the protocol reconnects
the interface will be brought up.
Note: This option is turned off by default.
o Dynamic wanrouter setup using 'wanconfig':
wanconfig utility can be used to
shutdown,restart,start or reconfigure
a virtual circuit dynamically.
Frame Relay: Each DLCI can be:
created,stopped,restarted and reconfigured
dynamically using wanconfig.
ex: wanconfig card wanpipe1 dev wp1_fr16 up
o Wanrouter startup via command line arguments:
wanconfig also supports wanrouter startup via command line
arguments. Thus, there is no need to create a wanpipe#.conf
configuration file.
o Socket based x25api update/bug fixes.
Added support for LCN numbers greater than 255.
Option to pass up modem messages.
Provided a PCI IRQ check, so a single S514
card is guaranteed to have a non-sharing interrupt.
o Fixes to the wancfg utility.
o New FT1 debugging support via *pipemon utilities.
o Frame Relay ARP support Enabled.
beta3-2.1.4 Jul 2000 o X25 M_BIT Problem fix.
o Added the Multi-Port PPP
Updated utilities for the Multi-Port PPP.
2.1.4 Aut 2000
o In X25API:
Maximum packet an application can send
to the driver has been extended to 4096 bytes.
Fixed the x25 startup bug. Enable
communications only after all interfaces
come up. HIGH SVC/PVC is used to calculate
the number of channels.
Enable protocol only after all interfaces
are enabled.
o Added an extra state to the FT1 config, kernel module.
o Updated the pipemon debuggers.
o Blocked the Multi-Port PPP from running on kernels
2.2.16 or greater, due to syncppp kernel module
change.
beta1-2.1.5 Nov 15 2000
o Fixed the MultiPort PPP Support for kernels 2.2.16 and above.
2.2.X kernels only
o Secured the driver UDP debugging calls
- All illegal network debugging calls are reported to
the log.
- Defined a set of allowed commands, all other denied.
o Cpipemon
- Added set FT1 commands to the cpipemon. Thus CSU/DSU
configuration can be performed using cpipemon.
All systems that cannot run cfgft1 GUI utility should
use cpipemon to configure the on board CSU/DSU.
o Keyboard Led Monitor/Debugger
- A new utility /usr/sbin/wpkbdmon uses keyboard leds
to convey operational statistic information of the
Sangoma WANPIPE cards.
NUM_LOCK = Line State (On=connected, Off=disconnected)
CAPS_LOCK = Tx data (On=transmitting, Off=no tx data)
SCROLL_LOCK = Rx data (On=receiving, Off=no rx data
o Hardware probe on module load and dynamic device allocation
- During WANPIPE module load, all Sangoma cards are probed
and found information is printed in the /var/log/messages.
- If no cards are found, the module load fails.
- Appropriate number of devices are dynamically loaded
based on the number of Sangoma cards found.
Note: The kernel configuration option
CONFIG_WANPIPE_CARDS has been taken out.
o Fixed the Frame Relay and Chdlc network interfaces so they are
compatible with libpcap libraries. Meaning, tcpdump, snort,
ethereal, and all other packet sniffers and debuggers work on
all WANPIPE network interfaces.
- Set the network interface encoding type to ARPHRD_PPP.
This tell the sniffers that data obtained from the
network interface is in pure IP format.
Fix for 2.2.X kernels only.
o True interface encoding option for Frame Relay and CHDLC
- The above fix sets the network interface encoding
type to ARPHRD_PPP, however some customers use
the encoding interface type to determine the
protocol running. Therefore, the TURE ENCODING
option will set the interface type back to the
original value.
NOTE: If this option is used with Frame Relay and CHDLC
libpcap library support will be broken.
i.e. tcpdump will not work.
Fix for 2.2.x Kernels only.
o Ethernet Bridgind over Frame Relay
- The Frame Relay bridging has been developed by
Kristian Hoffmann and Mark Wells.
- The Linux kernel bridge is used to send ethernet
data over the frame relay links.
For 2.2.X Kernels only.
o Added extensive 2.0.X support. Most new features of
2.1.5 for protocols Frame Relay, PPP and CHDLC are
supported under 2.0.X kernels.
beta1-2.2.0 Dec 30 2000
o Updated drivers for 2.4.X kernels.
o Updated drivers for SMP support.
o X25API is now able to share PCI interrupts.
o Took out a general polling routine that was used
only by X25API.
o Added appropriate locks to the dynamic reconfiguration
code.
o Fixed a bug in the keyboard debug monitor.
beta2-2.2.0 Jan 8 2001
o Patches for 2.4.0 kernel
o Patches for 2.2.18 kernel
o Minor updates to PPP and CHLDC drivers.
Note: No functional difference.
beta3-2.2.9 Jan 10 2001
o I missed the 2.2.18 kernel patches in beta2-2.2.0
release. They are included in this release.
Stable Release
2.2.0 Feb 01 2001
o Bug fix in wancfg GUI configurator.
The edit function didn't work properly.
bata1-2.2.1 Feb 09 2001
o WANPIPE TTY Driver emulation.
Two modes of operation Sync and Async.
Sync: Using the PPPD daemon, kernel SyncPPP layer
and the Wanpipe sync TTY driver: a PPP protocol
connection can be established via Sangoma adapter, over
a T1 leased line.
The 2.4.0 kernel PPP layer supports MULTILINK
protocol, that can be used to bundle any number of Sangoma
adapters (T1 lines) into one, under a single IP address.
Thus, efficiently obtaining multiple T1 throughput.
NOTE: The remote side must also implement MULTILINK PPP
protocol.
Async:Using the PPPD daemon, kernel AsyncPPP layer
and the WANPIPE async TTY driver: a PPP protocol
connection can be established via Sangoma adapter and
a modem, over a telephone line.
Thus, the WANPIPE async TTY driver simulates a serial
TTY driver that would normally be used to interface the
MODEM to the linux kernel.
o WANPIPE PPP Backup Utility
This utility will monitor the state of the PPP T1 line.
In case of failure, a dial up connection will be established
via pppd daemon, ether via a serial tty driver (serial port),
or a WANPIPE async TTY driver (in case serial port is unavailable).
Furthermore, while in dial up mode, the primary PPP T1 link
will be monitored for signs of life.
If the PPP T1 link comes back to life, the dial up connection
will be shutdown and T1 line re-established.
o New Setup installation script.
Option to UPGRADE device drivers if the kernel source has
already been patched with WANPIPE.
Option to COMPILE WANPIPE modules against the currently
running kernel, thus no need for manual kernel and module
re-compilation.
o Updates and Bug Fixes to wancfg utility.
bata2-2.2.1 Feb 20 2001
o Bug fixes to the CHDLC device drivers.
The driver had compilation problems under kernels
2.2.14 or lower.
o Bug fixes to the Setup installation script.
The device drivers compilation options didn't work
properly.
o Update to the wpbackupd daemon.
Optimized the cross-over times, between the primary
link and the backup dialup.
beta3-2.2.1 Mar 02 2001
o Patches for 2.4.2 kernel.
o Bug fixes to util/ make files.
o Bug fixes to the Setup installation script.
o Took out the backupd support and made it into
as separate package.
beta4-2.2.1 Mar 12 2001
o Fix to the Frame Relay Device driver.
IPSAC sends a packet of zero length
header to the frame relay driver. The
driver tries to push its own 2 byte header
into the packet, which causes the driver to
crash.
o Fix the WANPIPE re-configuration code.
Bug was found by trying to run the cfgft1 while the
interface was already running.
o Updates to cfgft1.
Writes a wanpipe#.cfgft1 configuration file
once the CSU/DSU is configured. This file can
holds the current CSU/DSU configuration.
>>>>>> END OF README <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

21
Documentation/s390/s390dbf.txt
View File

@ -115,6 +115,27 @@ Return Value: Handle for generated debug area
Description: Allocates memory for a debug log
Must not be called within an interrupt handler
----------------------------------------------------------------------------
debug_info_t *debug_register_mode(char *name, int pages, int nr_areas,
int buf_size, mode_t mode, uid_t uid,
gid_t gid);
Parameter: name: Name of debug log (e.g. used for debugfs entry)
pages: Number of pages, which will be allocated per area
nr_areas: Number of debug areas
buf_size: Size of data area in each debug entry
mode: File mode for debugfs files. E.g. S_IRWXUGO
uid: User ID for debugfs files. Currently only 0 is
supported.
gid: Group ID for debugfs files. Currently only 0 is
supported.
Return Value: Handle for generated debug area
NULL if register failed
Description: Allocates memory for a debug log
Must not be called within an interrupt handler
---------------------------------------------------------------------------
void debug_unregister (debug_info_t * id);

12
Documentation/scsi/st.txt
View File

@ -2,7 +2,7 @@ This file contains brief information about the SCSI tape driver.
The driver is currently maintained by Kai Mäkisara (email
Kai.Makisara@kolumbus.fi)
Last modified: Mon Mar 7 21:14:44 2005 by kai.makisara
Last modified: Sun Feb 24 21:59:07 2008 by kai.makisara
BASICS
@ -133,6 +133,11 @@ the defaults set by the user. The value -1 means the default is not set. The
file 'dev' contains the device numbers corresponding to this device. The links
'device' and 'driver' point to the SCSI device and driver entries.
Each directory also contains the entry 'options' which shows the currently
enabled driver and mode options. The value in the file is a bit mask where the
bit definitions are the same as those used with MTSETDRVBUFFER in setting the
options.
A link named 'tape' is made from the SCSI device directory to the class
directory corresponding to the mode 0 auto-rewind device (e.g., st0).
@ -372,6 +377,11 @@ MTSETDRVBUFFER
MT_ST_SYSV sets the SYSV semantics (mode)
MT_ST_NOWAIT enables immediate mode (i.e., don't wait for
the command to finish) for some commands (e.g., rewind)
MT_ST_SILI enables setting the SILI bit in SCSI commands when
reading in variable block mode to enhance performance when
reading blocks shorter than the byte count; set this only
if you are sure that the drive supports SILI and the HBA
correctly returns transfer residuals
MT_ST_DEBUGGING debugging (global; debugging must be
compiled into the driver)
MT_ST_SETBOOLEANS

0
Documentation/hrtimers/highres.txt → Documentation/timers/highres.txt
View File

0
Documentation/hrtimers/hrtimers.txt → Documentation/timers/hrtimers.txt
View File

0
Documentation/hrtimer/timer_stats.txt → Documentation/timers/timer_stats.txt
View File

7
Documentation/vm/hugetlbpage.txt
View File

@ -88,10 +88,9 @@ hugepages from the buddy allocator, if the normal pool is exhausted. As
these surplus hugepages go out of use, they are freed back to the buddy
allocator.
Caveat: Shrinking the pool via nr_hugepages while a surplus is in effect
will allow the number of surplus huge pages to exceed the overcommit
value, as the pool hugepages (which must have been in use for a surplus
hugepages to be allocated) will become surplus hugepages. As long as
Caveat: Shrinking the pool via nr_hugepages such that it becomes less
than the number of hugepages in use will convert the balance to surplus
huge pages even if it would exceed the overcommit value. As long as
this condition holds, however, no more surplus huge pages will be
allowed on the system until one of the two sysctls are increased
sufficiently, or the surplus huge pages go out of use and are freed.

100
Documentation/x86/pat.txt Normal file
View File

@ -0,0 +1,100 @@
PAT (Page Attribute Table)
x86 Page Attribute Table (PAT) allows for setting the memory attribute at the
page level granularity. PAT is complementary to the MTRR settings which allows
for setting of memory types over physical address ranges. However, PAT is
more flexible than MTRR due to its capability to set attributes at page level
and also due to the fact that there are no hardware limitations on number of
such attribute settings allowed. Added flexibility comes with guidelines for
not having memory type aliasing for the same physical memory with multiple
virtual addresses.
PAT allows for different types of memory attributes. The most commonly used
ones that will be supported at this time are Write-back, Uncached,
Write-combined and Uncached Minus.
There are many different APIs in the kernel that allows setting of memory
attributes at the page level. In order to avoid aliasing, these interfaces
should be used thoughtfully. Below is a table of interfaces available,
their intended usage and their memory attribute relationships. Internally,
these APIs use a reserve_memtype()/free_memtype() interface on the physical
address range to avoid any aliasing.
-------------------------------------------------------------------
API | RAM | ACPI,... | Reserved/Holes |
-----------------------|----------|------------|------------------|
| | | |
ioremap | -- | UC | UC |
| | | |
ioremap_cache | -- | WB | WB |
| | | |
ioremap_nocache | -- | UC | UC |
| | | |
ioremap_wc | -- | -- | WC |
| | | |
set_memory_uc | UC | -- | -- |
set_memory_wb | | | |
| | | |
set_memory_wc | WC | -- | -- |
set_memory_wb | | | |
| | | |
pci sysfs resource | -- | -- | UC |
| | | |
pci sysfs resource_wc | -- | -- | WC |
is IORESOURCE_PREFETCH| | | |
| | | |
pci proc | -- | -- | UC |
!PCIIOC_WRITE_COMBINE | | | |
| | | |
pci proc | -- | -- | WC |
PCIIOC_WRITE_COMBINE | | | |
| | | |
/dev/mem | -- | UC | UC |
read-write | | | |
| | | |
/dev/mem | -- | UC | UC |
mmap SYNC flag | | | |
| | | |
/dev/mem | -- | WB/WC/UC | WB/WC/UC |
mmap !SYNC flag | |(from exist-| (from exist- |
and | | ing alias)| ing alias) |
any alias to this area| | | |
| | | |
/dev/mem | -- | WB | WB |
mmap !SYNC flag | | | |
no alias to this area | | | |
and | | | |
MTRR says WB | | | |
| | | |
/dev/mem | -- | -- | UC_MINUS |
mmap !SYNC flag | | | |
no alias to this area | | | |
and | | | |
MTRR says !WB | | | |
| | | |
-------------------------------------------------------------------
Notes:
-- in the above table mean "Not suggested usage for the API". Some of the --'s
are strictly enforced by the kernel. Some others are not really enforced
today, but may be enforced in future.
For ioremap and pci access through /sys or /proc - The actual type returned
can be more restrictive, in case of any existing aliasing for that address.
For example: If there is an existing uncached mapping, a new ioremap_wc can
return uncached mapping in place of write-combine requested.
set_memory_[uc|wc] and set_memory_wb should be used in pairs, where driver will
first make a region uc or wc and switch it back to wb after use.
Over time writes to /proc/mtrr will be deprecated in favor of using PAT based
interfaces. Users writing to /proc/mtrr are suggested to use above interfaces.
Drivers should use ioremap_[uc|wc] to access PCI BARs with [uc|wc] access
types.
Drivers should use set_memory_[uc|wc] to set access type for RAM ranges.

5
Documentation/x86_64/boot-options.txt
View File

@ -307,3 +307,8 @@ Debugging
stuck (default)
Miscellaneous
nogbpages
Do not use GB pages for kernel direct mappings.
gbpages
Use GB pages for kernel direct mappings.

38
MAINTAINERS
View File

@ -846,15 +846,6 @@ L: linux-wireless@vger.kernel.org
W: http://linuxwireless.org/en/users/Drivers/b43
S: Maintained
BCM43XX WIRELESS DRIVER (SOFTMAC BASED VERSION)
P: Larry Finger
M: Larry.Finger@lwfinger.net
P: Stefano Brivio
M: stefano.brivio@polimi.it
L: linux-wireless@vger.kernel.org
W: http://bcm43xx.berlios.de/
S: Obsolete
BEFS FILE SYSTEM
P: Sergey S. Kostyliov
M: rathamahata@php4.ru
@ -2122,7 +2113,7 @@ M: reinette.chatre@intel.com
L: linux-wireless@vger.kernel.org
L: ipw3945-devel@lists.sourceforge.net
W: http://intellinuxwireless.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/rchatre/iwlwifi-2.6.git
T: git kernel.org:/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-2.6.git
S: Supported
IOC3 ETHERNET DRIVER
@ -2203,7 +2194,7 @@ S: Maintained
ISDN SUBSYSTEM
P: Karsten Keil
M: kkeil@suse.de
L: isdn4linux@listserv.isdn4linux.de
L: isdn4linux@listserv.isdn4linux.de (subscribers-only)
W: http://www.isdn4linux.de
T: git kernel.org:/pub/scm/linux/kernel/kkeil/isdn-2.6.git
S: Maintained
@ -2211,7 +2202,7 @@ S: Maintained
ISDN SUBSYSTEM (Eicon active card driver)
P: Armin Schindler
M: mac@melware.de
L: isdn4linux@listserv.isdn4linux.de
L: isdn4linux@listserv.isdn4linux.de (subscribers-only)
W: http://www.melware.de
S: Maintained
@ -2325,6 +2316,12 @@ L: linux-kernel@vger.kernel.org
L: kexec@lists.infradead.org
S: Maintained
KGDB
P: Jason Wessel
M: jason.wessel@windriver.com
L: kgdb-bugreport@lists.sourceforge.net
S: Maintained
KPROBES
P: Ananth N Mavinakayanahalli
M: ananth@in.ibm.com
@ -2952,6 +2949,7 @@ P: Joel Becker
M: joel.becker@oracle.com
L: ocfs2-devel@oss.oracle.com
W: http://oss.oracle.com/projects/ocfs2/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2.git
S: Supported
OMNIKEY CARDMAN 4000 DRIVER
@ -3286,6 +3284,7 @@ L: linux-wireless@vger.kernel.org
L: rt2400-devel@lists.sourceforge.net
W: http://rt2x00.serialmonkey.com/
S: Maintained
T: git kernel.org:/pub/scm/linux/kernel/git/ivd/rt2x00.git
F: drivers/net/wireless/rt2x00/
RAMDISK RAM BLOCK DEVICE DRIVER
@ -3348,6 +3347,13 @@ L: reiserfs-devel@vger.kernel.org
W: http://www.namesys.com
S: Supported
RFKILL
P: Ivo van Doorn
M: IvDoorn@gmail.com
L: netdev@vger.kernel.org
S: Maintained
F: net/rfkill
ROCKETPORT DRIVER
P: Comtrol Corp.
W: http://www.comtrol.com
@ -3470,7 +3476,7 @@ P: Vlad Yasevich
M: vladislav.yasevich@hp.com
P: Sridhar Samudrala
M: sri@us.ibm.com
L: lksctp-developers@lists.sourceforge.net
L: linux-sctp@vger.kernel.org
W: http://lksctp.sourceforge.net
S: Supported
@ -3604,12 +3610,6 @@ M: mhoffman@lightlink.com
L: lm-sensors@lm-sensors.org
S: Maintained
SOFTMAC LAYER (IEEE 802.11)
P: Daniel Drake
M: dsd@gentoo.org
L: linux-wireless@vger.kernel.org
S: Obsolete
SOFTWARE RAID (Multiple Disks) SUPPORT
P: Ingo Molnar
M: mingo@redhat.com

2
Makefile
View File

@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 25
EXTRAVERSION = -rc9
EXTRAVERSION =
NAME = Funky Weasel is Jiggy wit it
# *DOCUMENTATION*

2
arch/alpha/kernel/Makefile
View File

@ -7,7 +7,7 @@ EXTRA_AFLAGS := $(KBUILD_CFLAGS)
EXTRA_CFLAGS := -Werror -Wno-sign-compare
obj-y := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
irq_alpha.o signal.o setup.o ptrace.o time.o semaphore.o \
irq_alpha.o signal.o setup.o ptrace.o time.o \
alpha_ksyms.o systbls.o err_common.o io.o
obj-$(CONFIG_VGA_HOSE) += console.o

9
arch/alpha/kernel/alpha_ksyms.c
View File

@ -77,15 +77,6 @@ EXPORT_SYMBOL(__do_clear_user);
EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(__strnlen_user);
/* Semaphore helper functions. */
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_failed_interruptible);
EXPORT_SYMBOL(__up_wakeup);
EXPORT_SYMBOL(down);
EXPORT_SYMBOL(down_interruptible);
EXPORT_SYMBOL(down_trylock);
EXPORT_SYMBOL(up);
/*
* SMP-specific symbols.
*/

224
arch/alpha/kernel/semaphore.c
View File

@ -1,224 +0,0 @@
/*
* Alpha semaphore implementation.
*
* (C) Copyright 1996 Linus Torvalds
* (C) Copyright 1999, 2000 Richard Henderson
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/init.h>
/*
* This is basically the PPC semaphore scheme ported to use
* the Alpha ll/sc sequences, so see the PPC code for
* credits.
*/
/*
* Atomically update sem->count.
* This does the equivalent of the following:
*
* old_count = sem->count;
* tmp = MAX(old_count, 0) + incr;
* sem->count = tmp;
* return old_count;
*/
static inline int __sem_update_count(struct semaphore *sem, int incr)
{
long old_count, tmp = 0;
__asm__ __volatile__(
"1: ldl_l %0,%2\n"
" cmovgt %0,%0,%1\n"
" addl %1,%3,%1\n"
" stl_c %1,%2\n"
" beq %1,2f\n"
" mb\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
: "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
: "Ir" (incr), "1" (tmp), "m" (sem->count));
return old_count;
}
/*
* Perform the "down" function. Return zero for semaphore acquired,
* return negative for signalled out of the function.
*
* If called from down, the return is ignored and the wait loop is
* not interruptible. This means that a task waiting on a semaphore
* using "down()" cannot be killed until someone does an "up()" on
* the semaphore.
*
* If called from down_interruptible, the return value gets checked
* upon return. If the return value is negative then the task continues
* with the negative value in the return register (it can be tested by
* the caller).
*
* Either form may be used in conjunction with "up()".
*/
void __sched
__down_failed(struct semaphore *sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down failed(%p)\n",
tsk->comm, task_pid_nr(tsk), sem);
#endif
tsk->state = TASK_UNINTERRUPTIBLE;
wmb();
add_wait_queue_exclusive(&sem->wait, &wait);
/*
* Try to get the semaphore. If the count is > 0, then we've
* got the semaphore; we decrement count and exit the loop.
* If the count is 0 or negative, we set it to -1, indicating
* that we are asleep, and then sleep.
*/
while (__sem_update_count(sem, -1) <= 0) {
schedule();
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
}
remove_wait_queue(&sem->wait, &wait);
tsk->state = TASK_RUNNING;
/*
* If there are any more sleepers, wake one of them up so
* that it can either get the semaphore, or set count to -1
* indicating that there are still processes sleeping.
*/
wake_up(&sem->wait);
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down acquired(%p)\n",
tsk->comm, task_pid_nr(tsk), sem);
#endif
}
int __sched
__down_failed_interruptible(struct semaphore *sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
long ret = 0;
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down failed(%p)\n",
tsk->comm, task_pid_nr(tsk), sem);
#endif
tsk->state = TASK_INTERRUPTIBLE;
wmb();
add_wait_queue_exclusive(&sem->wait, &wait);
while (__sem_update_count(sem, -1) <= 0) {
if (signal_pending(current)) {
/*
* A signal is pending - give up trying.
* Set sem->count to 0 if it is negative,
* since we are no longer sleeping.
*/
__sem_update_count(sem, 0);
ret = -EINTR;
break;
}
schedule();
set_task_state(tsk, TASK_INTERRUPTIBLE);
}
remove_wait_queue(&sem->wait, &wait);
tsk->state = TASK_RUNNING;
wake_up(&sem->wait);
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down %s(%p)\n",
current->comm, task_pid_nr(current),
(ret < 0 ? "interrupted" : "acquired"), sem);
#endif
return ret;
}
void
__up_wakeup(struct semaphore *sem)
{
/*
* Note that we incremented count in up() before we came here,
* but that was ineffective since the result was <= 0, and
* any negative value of count is equivalent to 0.
* This ends up setting count to 1, unless count is now > 0
* (i.e. because some other cpu has called up() in the meantime),
* in which case we just increment count.
*/
__sem_update_count(sem, 1);
wake_up(&sem->wait);
}
void __sched
down(struct semaphore *sem)
{
#ifdef WAITQUEUE_DEBUG
CHECK_MAGIC(sem->__magic);
#endif
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down(%p) <count=%d> from %p\n",
current->comm, task_pid_nr(current), sem,
atomic_read(&sem->count), __builtin_return_address(0));
#endif
__down(sem);
}
int __sched
down_interruptible(struct semaphore *sem)
{
#ifdef WAITQUEUE_DEBUG
CHECK_MAGIC(sem->__magic);
#endif
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down(%p) <count=%d> from %p\n",
current->comm, task_pid_nr(current), sem,
atomic_read(&sem->count), __builtin_return_address(0));
#endif
return __down_interruptible(sem);
}
int
down_trylock(struct semaphore *sem)
{
int ret;
#ifdef WAITQUEUE_DEBUG
CHECK_MAGIC(sem->__magic);
#endif
ret = __down_trylock(sem);
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): down_trylock %s from %p\n",
current->comm, task_pid_nr(current),
ret ? "failed" : "acquired",
__builtin_return_address(0));
#endif
return ret;
}
void
up(struct semaphore *sem)
{
#ifdef WAITQUEUE_DEBUG
CHECK_MAGIC(sem->__magic);
#endif
#ifdef CONFIG_DEBUG_SEMAPHORE
printk("%s(%d): up(%p) <count=%d> from %p\n",
current->comm, task_pid_nr(current), sem,
atomic_read(&sem->count), __builtin_return_address(0));
#endif
__up(sem);
}

2
arch/arm/kernel/Makefile
View File

@ -7,7 +7,7 @@ AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Object file lists.
obj-y := compat.o entry-armv.o entry-common.o irq.o \
process.o ptrace.o semaphore.o setup.o signal.o \
process.o ptrace.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
obj-$(CONFIG_ISA_DMA_API) += dma.o

221
arch/arm/kernel/semaphore.c
View File

@ -1,221 +0,0 @@
/*
* ARM semaphore implementation, taken from
*
* i386 semaphore implementation.
*
* (C) Copyright 1999 Linus Torvalds
*
* Modified for ARM by Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <asm/semaphore.h>
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to acquire the semaphore, while the "sleeping"
* variable is a count of such acquires.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* "sleeping" and the contention routine ordering is
* protected by the semaphore spinlock.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
/*
* Logic:
* - only on a boundary condition do we need to care. When we go
* from a negative count to a non-negative, we wake people up.
* - when we go from a non-negative count to a negative do we
* (a) synchronize with the "sleeper" count and (b) make sure
* that we're on the wakeup list before we synchronize so that
* we cannot lose wakeup events.
*/
void __up(struct semaphore *sem)
{
wake_up(&sem->wait);
}
static DEFINE_SPINLOCK(semaphore_lock);
void __sched __down(struct semaphore * sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
tsk->state = TASK_UNINTERRUPTIBLE;
add_wait_queue_exclusive(&sem->wait, &wait);
spin_lock_irq(&semaphore_lock);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irq(&semaphore_lock);
schedule();
tsk->state = TASK_UNINTERRUPTIBLE;
spin_lock_irq(&semaphore_lock);
}
spin_unlock_irq(&semaphore_lock);
remove_wait_queue(&sem->wait, &wait);
tsk->state = TASK_RUNNING;
wake_up(&sem->wait);
}
int __sched __down_interruptible(struct semaphore * sem)
{
int retval = 0;
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
tsk->state = TASK_INTERRUPTIBLE;
add_wait_queue_exclusive(&sem->wait, &wait);
spin_lock_irq(&semaphore_lock);
sem->sleepers ++;
for (;;) {
int sleepers = sem->sleepers;
/*
* With signals pending, this turns into
* the trylock failure case - we won't be
* sleeping, and we* can't get the lock as
* it has contention. Just correct the count
* and exit.
*/
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
break;
}
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock. The
* "-1" is because we're still hoping to get
* the lock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irq(&semaphore_lock);
schedule();
tsk->state = TASK_INTERRUPTIBLE;
spin_lock_irq(&semaphore_lock);
}
spin_unlock_irq(&semaphore_lock);
tsk->state = TASK_RUNNING;
remove_wait_queue(&sem->wait, &wait);
wake_up(&sem->wait);
return retval;
}
/*
* Trylock failed - make sure we correct for
* having decremented the count.
*
* We could have done the trylock with a
* single "cmpxchg" without failure cases,
* but then it wouldn't work on a 386.
*/
int __down_trylock(struct semaphore * sem)
{
int sleepers;
unsigned long flags;
spin_lock_irqsave(&semaphore_lock, flags);
sleepers = sem->sleepers + 1;
sem->sleepers = 0;
/*
* Add "everybody else" and us into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers, &sem->count))
wake_up(&sem->wait);
spin_unlock_irqrestore(&semaphore_lock, flags);
return 1;
}
/*
* The semaphore operations have a special calling sequence that
* allow us to do a simpler in-line version of them. These routines
* need to convert that sequence back into the C sequence when
* there is contention on the semaphore.
*
* ip contains the semaphore pointer on entry. Save the C-clobbered
* registers (r0 to r3 and lr), but not ip, as we use it as a return
* value in some cases..
* To remain AAPCS compliant (64-bit stack align) we save r4 as well.
*/
asm(" .section .sched.text,\"ax\",%progbits \n\
.align 5 \n\
.globl __down_failed \n\
__down_failed: \n\
stmfd sp!, {r0 - r4, lr} \n\
mov r0, ip \n\
bl __down \n\
ldmfd sp!, {r0 - r4, pc} \n\
\n\
.align 5 \n\
.globl __down_interruptible_failed \n\
__down_interruptible_failed: \n\
stmfd sp!, {r0 - r4, lr} \n\
mov r0, ip \n\
bl __down_interruptible \n\
mov ip, r0 \n\
ldmfd sp!, {r0 - r4, pc} \n\
\n\
.align 5 \n\
.globl __down_trylock_failed \n\
__down_trylock_failed: \n\
stmfd sp!, {r0 - r4, lr} \n\
mov r0, ip \n\
bl __down_trylock \n\
mov ip, r0 \n\
ldmfd sp!, {r0 - r4, pc} \n\
\n\
.align 5 \n\
.globl __up_wakeup \n\
__up_wakeup: \n\
stmfd sp!, {r0 - r4, lr} \n\
mov r0, ip \n\
bl __up \n\
ldmfd sp!, {r0 - r4, pc} \n\
");
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_interruptible_failed);
EXPORT_SYMBOL(__down_trylock_failed);
EXPORT_SYMBOL(__up_wakeup);

1
arch/avr32/Kconfig
View File

@ -10,7 +10,6 @@ config AVR32
# With EMBEDDED=n, we get lots of stuff automatically selected
# that we usually don't need on AVR32.
select EMBEDDED
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_KPROBES
help

2
arch/avr32/kernel/Makefile
View File

@ -6,7 +6,7 @@ extra-y := head.o vmlinux.lds
obj-$(CONFIG_SUBARCH_AVR32B) += entry-avr32b.o
obj-y += syscall_table.o syscall-stubs.o irq.o
obj-y += setup.o traps.o semaphore.o ocd.o ptrace.o
obj-y += setup.o traps.o ocd.o ptrace.o
obj-y += signal.o sys_avr32.o process.o time.o
obj-y += init_task.o switch_to.o cpu.o
obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o

148
arch/avr32/kernel/semaphore.c
View File

@ -1,148 +0,0 @@
/*
* AVR32 sempahore implementation.
*
* Copyright (C) 2004-2006 Atmel Corporation
*
* Based on linux/arch/i386/kernel/semaphore.c
* Copyright (C) 1999 Linus Torvalds
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <asm/semaphore.h>
#include <asm/atomic.h>
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to acquire the semaphore, while the "sleeping"
* variable is a count of such acquires.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* "sleeping" and the contention routine ordering is protected
* by the spinlock in the semaphore's waitqueue head.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
/*
* Logic:
* - only on a boundary condition do we need to care. When we go
* from a negative count to a non-negative, we wake people up.
* - when we go from a non-negative count to a negative do we
* (a) synchronize with the "sleeper" count and (b) make sure
* that we're on the wakeup list before we synchronize so that
* we cannot lose wakeup events.
*/
void __up(struct semaphore *sem)
{
wake_up(&sem->wait);
}
EXPORT_SYMBOL(__up);
void __sched __down(struct semaphore *sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_UNINTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* the wait_queue_head.
*/
if (atomic_add_return(sleepers - 1, &sem->count) >= 0) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_UNINTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
}
EXPORT_SYMBOL(__down);
int __sched __down_interruptible(struct semaphore *sem)
{
int retval = 0;
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_INTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* With signals pending, this turns into the trylock
* failure case - we won't be sleeping, and we can't
* get the lock as it has contention. Just correct the
* count and exit.
*/
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
break;
}
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* the wait_queue_head.
*/
if (atomic_add_return(sleepers - 1, &sem->count) >= 0) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_INTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
return retval;
}
EXPORT_SYMBOL(__down_interruptible);

4
arch/blackfin/Kconfig
View File

@ -31,10 +31,6 @@ config ZONE_DMA
bool
default y
config SEMAPHORE_SLEEPERS
bool
default y
config GENERIC_FIND_NEXT_BIT
bool
default y

5
arch/blackfin/kernel/bfin_ksyms.c
View File

@ -42,11 +42,6 @@ EXPORT_SYMBOL(ip_fast_csum);
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(__up);
EXPORT_SYMBOL(__down);
EXPORT_SYMBOL(__down_trylock);
EXPORT_SYMBOL(__down_interruptible);
EXPORT_SYMBOL(is_in_rom);
EXPORT_SYMBOL(bfin_return_from_exception);

3
arch/cris/kernel/Makefile
View File

@ -5,8 +5,7 @@
extra-y := vmlinux.lds
obj-y := process.o traps.o irq.o ptrace.o setup.o \
time.o sys_cris.o semaphore.o
obj-y := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o
obj-$(CONFIG_MODULES) += crisksyms.o
obj-$(CONFIG_MODULES) += module.o

7
arch/cris/kernel/crisksyms.c
View File

@ -9,7 +9,6 @@
#include <linux/string.h>
#include <linux/tty.h>
#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@ -49,12 +48,6 @@ EXPORT_SYMBOL(__negdi2);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
/* Semaphore functions */
EXPORT_SYMBOL(__up);
EXPORT_SYMBOL(__down);
EXPORT_SYMBOL(__down_interruptible);
EXPORT_SYMBOL(__down_trylock);
/* Userspace access functions */
EXPORT_SYMBOL(__copy_user_zeroing);
EXPORT_SYMBOL(__copy_user);

129
arch/cris/kernel/semaphore.c
View File

@ -1,129 +0,0 @@
/*
* Generic semaphore code. Buyer beware. Do your own
* specific changes in <asm/semaphore-helper.h>
*/
#include <linux/sched.h>
#include <asm/semaphore-helper.h>
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to sleep, while the "waking" variable is
* incremented when the "up()" code goes to wake up waiting
* processes.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* waking_non_zero() (from asm/semaphore.h) must execute
* atomically.
*
* When __up() is called, the count was negative before
* incrementing it, and we need to wake up somebody.
*
* This routine adds one to the count of processes that need to
* wake up and exit. ALL waiting processes actually wake up but
* only the one that gets to the "waking" field first will gate
* through and acquire the semaphore. The others will go back
* to sleep.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
void __up(struct semaphore *sem)
{
wake_one_more(sem);
wake_up(&sem->wait);
}
/*
* Perform the "down" function. Return zero for semaphore acquired,
* return negative for signalled out of the function.
*
* If called from __down, the return is ignored and the wait loop is
* not interruptible. This means that a task waiting on a semaphore
* using "down()" cannot be killed until someone does an "up()" on
* the semaphore.
*
* If called from __down_interruptible, the return value gets checked
* upon return. If the return value is negative then the task continues
* with the negative value in the return register (it can be tested by
* the caller).
*
* Either form may be used in conjunction with "up()".
*
*/
#define DOWN_VAR \
struct task_struct *tsk = current; \
wait_queue_t wait; \
init_waitqueue_entry(&wait, tsk);
#define DOWN_HEAD(task_state) \
\
\
tsk->state = (task_state); \
add_wait_queue(&sem->wait, &wait); \
\
/* \
* Ok, we're set up. sem->count is known to be less than zero \
* so we must wait. \
* \
* We can let go the lock for purposes of waiting. \
* We re-acquire it after awaking so as to protect \
* all semaphore operations. \
* \
* If "up()" is called before we call waking_non_zero() then \
* we will catch it right away. If it is called later then \
* we will have to go through a wakeup cycle to catch it. \
* \
* Multiple waiters contend for the semaphore lock to see \
* who gets to gate through and who has to wait some more. \
*/ \
for (;;) {
#define DOWN_TAIL(task_state) \
tsk->state = (task_state); \
} \
tsk->state = TASK_RUNNING; \
remove_wait_queue(&sem->wait, &wait);
void __sched __down(struct semaphore * sem)
{
DOWN_VAR
DOWN_HEAD(TASK_UNINTERRUPTIBLE)
if (waking_non_zero(sem))
break;
schedule();
DOWN_TAIL(TASK_UNINTERRUPTIBLE)
}
int __sched __down_interruptible(struct semaphore * sem)
{
int ret = 0;
DOWN_VAR
DOWN_HEAD(TASK_INTERRUPTIBLE)
ret = waking_non_zero_interruptible(sem, tsk);
if (ret)
{
if (ret == 1)
/* ret != 0 only if we get interrupted -arca */
ret = 0;
break;
}
schedule();
DOWN_TAIL(TASK_INTERRUPTIBLE)
return ret;
}
int __down_trylock(struct semaphore * sem)
{
return waking_non_zero_trylock(sem);
}

2
arch/frv/kernel/Makefile
View File

@ -9,7 +9,7 @@ extra-y:= head.o init_task.o vmlinux.lds
obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o kernel_thread.o \
kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \
sys_frv.o time.o semaphore.o setup.o frv_ksyms.o \
sys_frv.o time.o setup.o frv_ksyms.o \
debug-stub.o irq.o sleep.o uaccess.o
obj-$(CONFIG_GDBSTUB) += gdb-stub.o gdb-io.o

1
arch/frv/kernel/frv_ksyms.c
View File

@ -12,7 +12,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/hardirq.h>
#include <asm/cacheflush.h>

155
arch/frv/kernel/semaphore.c
View File

@ -1,155 +0,0 @@
/* semaphore.c: FR-V semaphores
*
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
* - Derived from lib/rwsem-spinlock.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/sched.h>
#include <linux/module.h>
#include <asm/semaphore.h>
struct sem_waiter {
struct list_head list;
struct task_struct *task;
};
#ifdef CONFIG_DEBUG_SEMAPHORE
void semtrace(struct semaphore *sem, const char *str)
{
if (sem->debug)
printk("[%d] %s({%d,%d})\n",
current->pid,
str,
sem->counter,
list_empty(&sem->wait_list) ? 0 : 1);
}
#else
#define semtrace(SEM,STR) do { } while(0)
#endif
/*
* wait for a token to be granted from a semaphore
* - entered with lock held and interrupts disabled
*/
void __down(struct semaphore *sem, unsigned long flags)
{
struct task_struct *tsk = current;
struct sem_waiter waiter;
semtrace(sem, "Entering __down");
/* set up my own style of waitqueue */
waiter.task = tsk;
get_task_struct(tsk);
list_add_tail(&waiter.list, &sem->wait_list);
/* we don't need to touch the semaphore struct anymore */
spin_unlock_irqrestore(&sem->wait_lock, flags);
/* wait to be given the semaphore */
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
for (;;) {
if (list_empty(&waiter.list))
break;
schedule();
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
}
tsk->state = TASK_RUNNING;
semtrace(sem, "Leaving __down");
}
EXPORT_SYMBOL(__down);
/*
* interruptibly wait for a token to be granted from a semaphore
* - entered with lock held and interrupts disabled
*/
int __down_interruptible(struct semaphore *sem, unsigned long flags)
{
struct task_struct *tsk = current;
struct sem_waiter waiter;
int ret;
semtrace(sem,"Entering __down_interruptible");
/* set up my own style of waitqueue */
waiter.task = tsk;
get_task_struct(tsk);
list_add_tail(&waiter.list, &sem->wait_list);
/* we don't need to touch the semaphore struct anymore */
set_task_state(tsk, TASK_INTERRUPTIBLE);
spin_unlock_irqrestore(&sem->wait_lock, flags);
/* wait to be given the semaphore */
ret = 0;
for (;;) {
if (list_empty(&waiter.list))
break;
if (unlikely(signal_pending(current)))
goto interrupted;
schedule();
set_task_state(tsk, TASK_INTERRUPTIBLE);
}
out:
tsk->state = TASK_RUNNING;
semtrace(sem, "Leaving __down_interruptible");
return ret;
interrupted:
spin_lock_irqsave(&sem->wait_lock, flags);
if (!list_empty(&waiter.list)) {
list_del(&waiter.list);
ret = -EINTR;
}
spin_unlock_irqrestore(&sem->wait_lock, flags);
if (ret == -EINTR)
put_task_struct(current);
goto out;
}
EXPORT_SYMBOL(__down_interruptible);
/*
* release a single token back to a semaphore
* - entered with lock held and interrupts disabled
*/
void __up(struct semaphore *sem)
{
struct task_struct *tsk;
struct sem_waiter *waiter;
semtrace(sem,"Entering __up");
/* grant the token to the process at the front of the queue */
waiter = list_entry(sem->wait_list.next, struct sem_waiter, list);
/* We must be careful not to touch 'waiter' after we set ->task = NULL.
* It is allocated on the waiter's stack and may become invalid at
* any time after that point (due to a wakeup from another source).
*/
list_del_init(&waiter->list);
tsk = waiter->task;
mb();
waiter->task = NULL;
wake_up_process(tsk);
put_task_struct(tsk);
semtrace(sem,"Leaving __up");
}
EXPORT_SYMBOL(__up);

2
arch/frv/kernel/traps.c
View File

@ -73,7 +73,7 @@ asmlinkage void illegal_instruction(unsigned long esfr1, unsigned long epcr0, un
epcr0, esr0, esfr1);
info.si_errno = 0;
info.si_addr = (void *) ((epcr0 & EPCR0_PC) ? (epcr0 & EPCR0_PC) : __frame->pc);
info.si_addr = (void *) ((epcr0 & EPCR0_V) ? (epcr0 & EPCR0_PC) : __frame->pc);
switch (__frame->tbr & TBR_TT) {
case TBR_TT_ILLEGAL_INSTR:

2
arch/h8300/kernel/Makefile
View File

@ -5,7 +5,7 @@
extra-y := vmlinux.lds
obj-y := process.o traps.o ptrace.o irq.o \
sys_h8300.o time.o semaphore.o signal.o \
sys_h8300.o time.o signal.o \
setup.o gpio.o init_task.o syscalls.o \
entry.o

1
arch/h8300/kernel/h8300_ksyms.c
View File

@ -12,7 +12,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/current.h>
#include <asm/gpio.h>

132
arch/h8300/kernel/semaphore.c
View File

@ -1,132 +0,0 @@
/*
* Generic semaphore code. Buyer beware. Do your own
* specific changes in <asm/semaphore-helper.h>
*/
#include <linux/sched.h>
#include <linux/init.h>
#include <asm/semaphore-helper.h>
#ifndef CONFIG_RMW_INSNS
spinlock_t semaphore_wake_lock;
#endif
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to sleep, while the "waking" variable is
* incremented when the "up()" code goes to wake up waiting
* processes.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* waking_non_zero() (from asm/semaphore.h) must execute
* atomically.
*
* When __up() is called, the count was negative before
* incrementing it, and we need to wake up somebody.
*
* This routine adds one to the count of processes that need to
* wake up and exit. ALL waiting processes actually wake up but
* only the one that gets to the "waking" field first will gate
* through and acquire the semaphore. The others will go back
* to sleep.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
void __up(struct semaphore *sem)
{
wake_one_more(sem);
wake_up(&sem->wait);
}
/*
* Perform the "down" function. Return zero for semaphore acquired,
* return negative for signalled out of the function.
*
* If called from __down, the return is ignored and the wait loop is
* not interruptible. This means that a task waiting on a semaphore
* using "down()" cannot be killed until someone does an "up()" on
* the semaphore.
*
* If called from __down_interruptible, the return value gets checked
* upon return. If the return value is negative then the task continues
* with the negative value in the return register (it can be tested by
* the caller).
*
* Either form may be used in conjunction with "up()".
*
*/
#define DOWN_HEAD(task_state) \
\
\
current->state = (task_state); \
add_wait_queue(&sem->wait, &wait); \
\
/* \
* Ok, we're set up. sem->count is known to be less than zero \
* so we must wait. \
* \
* We can let go the lock for purposes of waiting. \
* We re-acquire it after awaking so as to protect \
* all semaphore operations. \
* \
* If "up()" is called before we call waking_non_zero() then \
* we will catch it right away. If it is called later then \
* we will have to go through a wakeup cycle to catch it. \
* \
* Multiple waiters contend for the semaphore lock to see \
* who gets to gate through and who has to wait some more. \
*/ \
for (;;) {
#define DOWN_TAIL(task_state) \
current->state = (task_state); \
} \
current->state = TASK_RUNNING; \
remove_wait_queue(&sem->wait, &wait);
void __sched __down(struct semaphore * sem)
{
DECLARE_WAITQUEUE(wait, current);
DOWN_HEAD(TASK_UNINTERRUPTIBLE)
if (waking_non_zero(sem))
break;
schedule();
DOWN_TAIL(TASK_UNINTERRUPTIBLE)
}
int __sched __down_interruptible(struct semaphore * sem)
{
DECLARE_WAITQUEUE(wait, current);
int ret = 0;
DOWN_HEAD(TASK_INTERRUPTIBLE)
ret = waking_non_zero_interruptible(sem, current);
if (ret)
{
if (ret == 1)
/* ret != 0 only if we get interrupted -arca */
ret = 0;
break;
}
schedule();
DOWN_TAIL(TASK_INTERRUPTIBLE)
return ret;
}
int __down_trylock(struct semaphore * sem)
{
return waking_non_zero_trylock(sem);
}

14
arch/ia64/Kconfig
View File

@ -283,6 +283,17 @@ config FORCE_MAX_ZONEORDER
default "17" if HUGETLB_PAGE
default "11"
config VIRT_CPU_ACCOUNTING
bool "Deterministic task and CPU time accounting"
default n
help
Select this option to enable more accurate task and CPU time
accounting. This is done by reading a CPU counter on each
kernel entry and exit and on transitions within the kernel
between system, softirq and hardirq state, so there is a
small performance impact.
If in doubt, say N here.
config SMP
bool "Symmetric multi-processing support"
help
@ -611,6 +622,9 @@ config IRQ_PER_CPU
bool
default y
config IOMMU_HELPER
def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC)
source "arch/ia64/hp/sim/Kconfig"
source "arch/ia64/Kconfig.debug"

56
arch/ia64/hp/common/sba_iommu.c
View File

@ -35,6 +35,7 @@
#include <linux/nodemask.h>
#include <linux/bitops.h> /* hweight64() */
#include <linux/crash_dump.h>
#include <linux/iommu-helper.h>
#include <asm/delay.h> /* ia64_get_itc() */
#include <asm/io.h>
@ -460,6 +461,13 @@ get_iovp_order (unsigned long size)
return order;
}
static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr,
unsigned int bitshiftcnt)
{
return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3)
+ bitshiftcnt;
}
/**
* sba_search_bitmap - find free space in IO PDIR resource bitmap
* @ioc: IO MMU structure which owns the pdir we are interested in.
@ -471,15 +479,25 @@ get_iovp_order (unsigned long size)
* Cool perf optimization: search for log2(size) bits at a time.
*/
static SBA_INLINE unsigned long
sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted, int use_hint)
sba_search_bitmap(struct ioc *ioc, struct device *dev,
unsigned long bits_wanted, int use_hint)
{
unsigned long *res_ptr;
unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]);
unsigned long flags, pide = ~0UL;
unsigned long flags, pide = ~0UL, tpide;
unsigned long boundary_size;
unsigned long shift;
int ret;
ASSERT(((unsigned long) ioc->res_hint & (sizeof(unsigned long) - 1UL)) == 0);
ASSERT(res_ptr < res_end);
boundary_size = (unsigned long long)dma_get_seg_boundary(dev) + 1;
boundary_size = ALIGN(boundary_size, 1ULL << iovp_shift) >> iovp_shift;
BUG_ON(ioc->ibase & ~iovp_mask);
shift = ioc->ibase >> iovp_shift;
spin_lock_irqsave(&ioc->res_lock, flags);
/* Allow caller to force a search through the entire resource space */
@ -504,9 +522,7 @@ sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted, int use_hint)
if (likely(*res_ptr != ~0UL)) {
bitshiftcnt = ffz(*res_ptr);
*res_ptr |= (1UL << bitshiftcnt);
pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
pide <<= 3; /* convert to bit address */
pide += bitshiftcnt;
pide = ptr_to_pide(ioc, res_ptr, bitshiftcnt);
ioc->res_bitshift = bitshiftcnt + bits_wanted;
goto found_it;
}
@ -535,11 +551,13 @@ sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted, int use_hint)
DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr);
ASSERT(0 != mask);
for (; mask ; mask <<= o, bitshiftcnt += o) {
if(0 == ((*res_ptr) & mask)) {
tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt);
ret = iommu_is_span_boundary(tpide, bits_wanted,
shift,
boundary_size);
if ((0 == ((*res_ptr) & mask)) && !ret) {
*res_ptr |= mask; /* mark resources busy! */
pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
pide <<= 3; /* convert to bit address */
pide += bitshiftcnt;
pide = tpide;
ioc->res_bitshift = bitshiftcnt + bits_wanted;
goto found_it;
}
@ -560,6 +578,11 @@ sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted, int use_hint)
end = res_end - qwords;
for (; res_ptr < end; res_ptr++) {
tpide = ptr_to_pide(ioc, res_ptr, 0);
ret = iommu_is_span_boundary(tpide, bits_wanted,
shift, boundary_size);
if (ret)
goto next_ptr;
for (i = 0 ; i < qwords ; i++) {
if (res_ptr[i] != 0)
goto next_ptr;
@ -572,8 +595,7 @@ sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted, int use_hint)
res_ptr[i] = ~0UL;
res_ptr[i] |= RESMAP_MASK(bits);
pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
pide <<= 3; /* convert to bit address */
pide = tpide;
res_ptr += qwords;
ioc->res_bitshift = bits;
goto found_it;
@ -605,7 +627,7 @@ found_it:
* resource bit map.
*/
static int
sba_alloc_range(struct ioc *ioc, size_t size)
sba_alloc_range(struct ioc *ioc, struct device *dev, size_t size)
{
unsigned int pages_needed = size >> iovp_shift;
#ifdef PDIR_SEARCH_TIMING
@ -622,9 +644,9 @@ sba_alloc_range(struct ioc *ioc, size_t size)
/*
** "seek and ye shall find"...praying never hurts either...
*/
pide = sba_search_bitmap(ioc, pages_needed, 1);
pide = sba_search_bitmap(ioc, dev, pages_needed, 1);
if (unlikely(pide >= (ioc->res_size << 3))) {
pide = sba_search_bitmap(ioc, pages_needed, 0);
pide = sba_search_bitmap(ioc, dev, pages_needed, 0);
if (unlikely(pide >= (ioc->res_size << 3))) {
#if DELAYED_RESOURCE_CNT > 0
unsigned long flags;
@ -653,7 +675,7 @@ sba_alloc_range(struct ioc *ioc, size_t size)
}
spin_unlock_irqrestore(&ioc->saved_lock, flags);
pide = sba_search_bitmap(ioc, pages_needed, 0);
pide = sba_search_bitmap(ioc, dev, pages_needed, 0);
if (unlikely(pide >= (ioc->res_size << 3)))
panic(__FILE__ ": I/O MMU @ %p is out of mapping resources\n",
ioc->ioc_hpa);
@ -936,7 +958,7 @@ sba_map_single(struct device *dev, void *addr, size_t size, int dir)
spin_unlock_irqrestore(&ioc->res_lock, flags);
#endif
pide = sba_alloc_range(ioc, size);
pide = sba_alloc_range(ioc, dev, size);
iovp = (dma_addr_t) pide << iovp_shift;
@ -1373,7 +1395,7 @@ sba_coalesce_chunks(struct ioc *ioc, struct device *dev,
dma_len = (dma_len + dma_offset + ~iovp_mask) & iovp_mask;
ASSERT(dma_len <= DMA_CHUNK_SIZE);
dma_sg->dma_address = (dma_addr_t) (PIDE_FLAG
| (sba_alloc_range(ioc, dma_len) << iovp_shift)
| (sba_alloc_range(ioc, dev, dma_len) << iovp_shift)
| dma_offset);
n_mappings++;
}

2
arch/ia64/hp/sim/simeth.c
View File

@ -294,7 +294,7 @@ simeth_device_event(struct notifier_block *this,unsigned long event, void *ptr)
return NOTIFY_DONE;
}
if (dev->nd_net != &init_net)
if (dev_net(dev) != &init_net)
return NOTIFY_DONE;
if ( event != NETDEV_UP && event != NETDEV_DOWN ) return NOTIFY_DONE;

23
arch/ia64/hp/sim/simscsi.c
View File

@ -201,22 +201,6 @@ simscsi_readwrite10 (struct scsi_cmnd *sc, int mode)
simscsi_sg_readwrite(sc, mode, offset);
}
static void simscsi_fillresult(struct scsi_cmnd *sc, char *buf, unsigned len)
{
int i;
unsigned thislen;
struct scatterlist *slp;
scsi_for_each_sg(sc, slp, scsi_sg_count(sc), i) {
if (!len)
break;
thislen = min(len, slp->length);
memcpy(sg_virt(slp), buf, thislen);
len -= thislen;
}
}
static int
simscsi_queuecommand (struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
{
@ -258,7 +242,7 @@ simscsi_queuecommand (struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
buf[6] = 0; /* reserved */
buf[7] = 0; /* various flags */
memcpy(buf + 8, "HP SIMULATED DISK 0.00", 28);
simscsi_fillresult(sc, buf, 36);
scsi_sg_copy_from_buffer(sc, buf, 36);
sc->result = GOOD;
break;
@ -306,14 +290,15 @@ simscsi_queuecommand (struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
buf[5] = 0;
buf[6] = 2;
buf[7] = 0;
simscsi_fillresult(sc, buf, 8);
scsi_sg_copy_from_buffer(sc, buf, 8);
sc->result = GOOD;
break;
case MODE_SENSE:
case MODE_SENSE_10:
/* sd.c uses this to determine whether disk does write-caching. */
simscsi_fillresult(sc, (char *)empty_zero_page, scsi_bufflen(sc));
scsi_sg_copy_from_buffer(sc, (char *)empty_zero_page,
PAGE_SIZE);
sc->result = GOOD;
break;

14
arch/ia64/ia32/elfcore32.h
View File

@ -30,7 +30,19 @@ struct elf_siginfo
int si_errno; /* errno */
};
#define jiffies_to_timeval(a,b) do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; }while(0)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
* Hacks are here since types between compat_timeval (= pair of s32) and
* ia64-native timeval (= pair of s64) are not compatible, at least a file
* arch/ia64/ia32/../../../fs/binfmt_elf.c will get warnings from compiler on
* use of cputime_to_timeval(), which usually an alias of jiffies_to_timeval().
*/
#define cputime_to_timeval(a,b) \
do { (b)->tv_usec = 0; (b)->tv_sec = (a)/NSEC_PER_SEC; } while(0)
#else
#define jiffies_to_timeval(a,b) \
do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; } while(0)
#endif
struct elf_prstatus
{

649
arch/ia64/ia32/sys_ia32.c
View File

@ -38,6 +38,7 @@
#include <linux/eventpoll.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/regset.h>
#include <linux/stat.h>
#include <linux/ipc.h>
#include <linux/capability.h>
@ -2387,16 +2388,45 @@ get_free_idx (void)
return -ESRCH;
}
static void set_tls_desc(struct task_struct *p, int idx,
const struct ia32_user_desc *info, int n)
{
struct thread_struct *t = &p->thread;
struct desc_struct *desc = &t->tls_array[idx - GDT_ENTRY_TLS_MIN];
int cpu;
/*
* We must not get preempted while modifying the TLS.
*/
cpu = get_cpu();
while (n-- > 0) {
if (LDT_empty(info)) {
desc->a = 0;
desc->b = 0;
} else {
desc->a = LDT_entry_a(info);
desc->b = LDT_entry_b(info);
}
++info;
++desc;
}
if (t == &current->thread)
load_TLS(t, cpu);
put_cpu();
}
/*
* Set a given TLS descriptor:
*/
asmlinkage int
sys32_set_thread_area (struct ia32_user_desc __user *u_info)
{
struct thread_struct *t = &current->thread;
struct ia32_user_desc info;
struct desc_struct *desc;
int cpu, idx;
int idx;
if (copy_from_user(&info, u_info, sizeof(info)))
return -EFAULT;
@ -2416,18 +2446,7 @@ sys32_set_thread_area (struct ia32_user_desc __user *u_info)
if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
return -EINVAL;
desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
cpu = smp_processor_id();
if (LDT_empty(&info)) {
desc->a = 0;
desc->b = 0;
} else {
desc->a = LDT_entry_a(&info);
desc->b = LDT_entry_b(&info);
}
load_TLS(t, cpu);
set_tls_desc(current, idx, &info, 1);
return 0;
}
@ -2451,6 +2470,20 @@ sys32_set_thread_area (struct ia32_user_desc __user *u_info)
#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
static void fill_user_desc(struct ia32_user_desc *info, int idx,
const struct desc_struct *desc)
{
info->entry_number = idx;
info->base_addr = GET_BASE(desc);
info->limit = GET_LIMIT(desc);
info->seg_32bit = GET_32BIT(desc);
info->contents = GET_CONTENTS(desc);
info->read_exec_only = !GET_WRITABLE(desc);
info->limit_in_pages = GET_LIMIT_PAGES(desc);
info->seg_not_present = !GET_PRESENT(desc);
info->useable = GET_USEABLE(desc);
}
asmlinkage int
sys32_get_thread_area (struct ia32_user_desc __user *u_info)
{
@ -2464,22 +2497,588 @@ sys32_get_thread_area (struct ia32_user_desc __user *u_info)
return -EINVAL;
desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
info.entry_number = idx;
info.base_addr = GET_BASE(desc);
info.limit = GET_LIMIT(desc);
info.seg_32bit = GET_32BIT(desc);
info.contents = GET_CONTENTS(desc);
info.read_exec_only = !GET_WRITABLE(desc);
info.limit_in_pages = GET_LIMIT_PAGES(desc);
info.seg_not_present = !GET_PRESENT(desc);
info.useable = GET_USEABLE(desc);
fill_user_desc(&info, idx, desc);
if (copy_to_user(u_info, &info, sizeof(info)))
return -EFAULT;
return 0;
}
struct regset_get {
void *kbuf;
void __user *ubuf;
};
struct regset_set {
const void *kbuf;
const void __user *ubuf;
};
struct regset_getset {
struct task_struct *target;
const struct user_regset *regset;
union {
struct regset_get get;
struct regset_set set;
} u;
unsigned int pos;
unsigned int count;
int ret;
};
static void getfpreg(struct task_struct *task, int regno, int *val)
{
switch (regno / sizeof(int)) {
case 0:
*val = task->thread.fcr & 0xffff;
break;
case 1:
*val = task->thread.fsr & 0xffff;
break;
case 2:
*val = (task->thread.fsr>>16) & 0xffff;
break;
case 3:
*val = task->thread.fir;
break;
case 4:
*val = (task->thread.fir>>32) & 0xffff;
break;
case 5:
*val = task->thread.fdr;
break;
case 6:
*val = (task->thread.fdr >> 32) & 0xffff;
break;
}
}
static void setfpreg(struct task_struct *task, int regno, int val)
{
switch (regno / sizeof(int)) {
case 0:
task->thread.fcr = (task->thread.fcr & (~0x1f3f))
| (val & 0x1f3f);
break;
case 1:
task->thread.fsr = (task->thread.fsr & (~0xffff)) | val;
break;
case 2:
task->thread.fsr = (task->thread.fsr & (~0xffff0000))
| (val << 16);
break;
case 3:
task->thread.fir = (task->thread.fir & (~0xffffffff)) | val;
break;
case 5:
task->thread.fdr = (task->thread.fdr & (~0xffffffff)) | val;
break;
}
}
static void access_fpreg_ia32(int regno, void *reg,
struct pt_regs *pt, struct switch_stack *sw,
int tos, int write)
{
void *f;
if ((regno += tos) >= 8)
regno -= 8;
if (regno < 4)
f = &pt->f8 + regno;
else if (regno <= 7)
f = &sw->f12 + (regno - 4);
else {
printk(KERN_ERR "regno must be less than 7 \n");
return;
}
if (write)
memcpy(f, reg, sizeof(struct _fpreg_ia32));
else
memcpy(reg, f, sizeof(struct _fpreg_ia32));
}
static void do_fpregs_get(struct unw_frame_info *info, void *arg)
{
struct regset_getset *dst = arg;
struct task_struct *task = dst->target;
struct pt_regs *pt;
int start, end, tos;
char buf[80];
if (dst->count == 0 || unw_unwind_to_user(info) < 0)
return;
if (dst->pos < 7 * sizeof(int)) {
end = min((dst->pos + dst->count),
(unsigned int)(7 * sizeof(int)));
for (start = dst->pos; start < end; start += sizeof(int))
getfpreg(task, start, (int *)(buf + start));
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf, buf,
0, 7 * sizeof(int));
if (dst->ret || dst->count == 0)
return;
}
if (dst->pos < sizeof(struct ia32_user_i387_struct)) {
pt = task_pt_regs(task);
tos = (task->thread.fsr >> 11) & 7;
end = min(dst->pos + dst->count,
(unsigned int)(sizeof(struct ia32_user_i387_struct)));
start = (dst->pos - 7 * sizeof(int)) /
sizeof(struct _fpreg_ia32);
end = (end - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32);
for (; start < end; start++)
access_fpreg_ia32(start,
(struct _fpreg_ia32 *)buf + start,
pt, info->sw, tos, 0);
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf,
buf, 7 * sizeof(int),
sizeof(struct ia32_user_i387_struct));
if (dst->ret || dst->count == 0)
return;
}
}
static void do_fpregs_set(struct unw_frame_info *info, void *arg)
{
struct regset_getset *dst = arg;
struct task_struct *task = dst->target;
struct pt_regs *pt;
char buf[80];
int end, start, tos;
if (dst->count == 0 || unw_unwind_to_user(info) < 0)
return;
if (dst->pos < 7 * sizeof(int)) {
start = dst->pos;
dst->ret = user_regset_copyin(&dst->pos, &dst->count,
&dst->u.set.kbuf, &dst->u.set.ubuf, buf,
0, 7 * sizeof(int));
if (dst->ret)
return;
for (; start < dst->pos; start += sizeof(int))
setfpreg(task, start, *((int *)(buf + start)));
if (dst->count == 0)
return;
}
if (dst->pos < sizeof(struct ia32_user_i387_struct)) {
start = (dst->pos - 7 * sizeof(int)) /
sizeof(struct _fpreg_ia32);
dst->ret = user_regset_copyin(&dst->pos, &dst->count,
&dst->u.set.kbuf, &dst->u.set.ubuf,
buf, 7 * sizeof(int),
sizeof(struct ia32_user_i387_struct));
if (dst->ret)
return;
pt = task_pt_regs(task);
tos = (task->thread.fsr >> 11) & 7;
end = (dst->pos - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32);
for (; start < end; start++)
access_fpreg_ia32(start,
(struct _fpreg_ia32 *)buf + start,
pt, info->sw, tos, 1);
if (dst->count == 0)
return;
}
}
#define OFFSET(member) ((int)(offsetof(struct ia32_user_fxsr_struct, member)))
static void getfpxreg(struct task_struct *task, int start, int end, char *buf)
{
int min_val;
min_val = min(end, OFFSET(fop));
while (start < min_val) {
if (start == OFFSET(cwd))
*((short *)buf) = task->thread.fcr & 0xffff;
else if (start == OFFSET(swd))
*((short *)buf) = task->thread.fsr & 0xffff;
else if (start == OFFSET(twd))
*((short *)buf) = (task->thread.fsr>>16) & 0xffff;
buf += 2;
start += 2;
}
/* skip fop element */
if (start == OFFSET(fop)) {
start += 2;
buf += 2;
}
while (start < end) {
if (start == OFFSET(fip))
*((int *)buf) = task->thread.fir;
else if (start == OFFSET(fcs))
*((int *)buf) = (task->thread.fir>>32) & 0xffff;
else if (start == OFFSET(foo))
*((int *)buf) = task->thread.fdr;
else if (start == OFFSET(fos))
*((int *)buf) = (task->thread.fdr>>32) & 0xffff;
else if (start == OFFSET(mxcsr))
*((int *)buf) = ((task->thread.fcr>>32) & 0xff80)
| ((task->thread.fsr>>32) & 0x3f);
buf += 4;
start += 4;
}
}
static void setfpxreg(struct task_struct *task, int start, int end, char *buf)
{
int min_val, num32;
short num;
unsigned long num64;
min_val = min(end, OFFSET(fop));
while (start < min_val) {
num = *((short *)buf);
if (start == OFFSET(cwd)) {
task->thread.fcr = (task->thread.fcr & (~0x1f3f))
| (num & 0x1f3f);
} else if (start == OFFSET(swd)) {
task->thread.fsr = (task->thread.fsr & (~0xffff)) | num;
} else if (start == OFFSET(twd)) {
task->thread.fsr = (task->thread.fsr & (~0xffff0000))
| (((int)num) << 16);
}
buf += 2;
start += 2;
}
/* skip fop element */
if (start == OFFSET(fop)) {
start += 2;
buf += 2;
}
while (start < end) {
num32 = *((int *)buf);
if (start == OFFSET(fip))
task->thread.fir = (task->thread.fir & (~0xffffffff))
| num32;
else if (start == OFFSET(foo))
task->thread.fdr = (task->thread.fdr & (~0xffffffff))
| num32;
else if (start == OFFSET(mxcsr)) {
num64 = num32 & 0xff10;
task->thread.fcr = (task->thread.fcr &
(~0xff1000000000UL)) | (num64<<32);
num64 = num32 & 0x3f;
task->thread.fsr = (task->thread.fsr &
(~0x3f00000000UL)) | (num64<<32);
}
buf += 4;
start += 4;
}
}
static void do_fpxregs_get(struct unw_frame_info *info, void *arg)
{
struct regset_getset *dst = arg;
struct task_struct *task = dst->target;
struct pt_regs *pt;
char buf[128];
int start, end, tos;
if (dst->count == 0 || unw_unwind_to_user(info) < 0)
return;
if (dst->pos < OFFSET(st_space[0])) {
end = min(dst->pos + dst->count, (unsigned int)32);
getfpxreg(task, dst->pos, end, buf);
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf, buf,
0, OFFSET(st_space[0]));
if (dst->ret || dst->count == 0)
return;
}
if (dst->pos < OFFSET(xmm_space[0])) {
pt = task_pt_regs(task);
tos = (task->thread.fsr >> 11) & 7;
end = min(dst->pos + dst->count,
(unsigned int)OFFSET(xmm_space[0]));
start = (dst->pos - OFFSET(st_space[0])) / 16;
end = (end - OFFSET(st_space[0])) / 16;
for (; start < end; start++)
access_fpreg_ia32(start, buf + 16 * start, pt,
info->sw, tos, 0);
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf,
buf, OFFSET(st_space[0]), OFFSET(xmm_space[0]));
if (dst->ret || dst->count == 0)
return;
}
if (dst->pos < OFFSET(padding[0]))
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf,
&info->sw->f16, OFFSET(xmm_space[0]),
OFFSET(padding[0]));
}
static void do_fpxregs_set(struct unw_frame_info *info, void *arg)
{
struct regset_getset *dst = arg;
struct task_struct *task = dst->target;
char buf[128];
int start, end;
if (dst->count == 0 || unw_unwind_to_user(info) < 0)
return;
if (dst->pos < OFFSET(st_space[0])) {
start = dst->pos;
dst->ret = user_regset_copyin(&dst->pos, &dst->count,
&dst->u.set.kbuf, &dst->u.set.ubuf,
buf, 0, OFFSET(st_space[0]));
if (dst->ret)
return;
setfpxreg(task, start, dst->pos, buf);
if (dst->count == 0)
return;
}
if (dst->pos < OFFSET(xmm_space[0])) {
struct pt_regs *pt;
int tos;
pt = task_pt_regs(task);
tos = (task->thread.fsr >> 11) & 7;
start = (dst->pos - OFFSET(st_space[0])) / 16;
dst->ret = user_regset_copyin(&dst->pos, &dst->count,
&dst->u.set.kbuf, &dst->u.set.ubuf,
buf, OFFSET(st_space[0]), OFFSET(xmm_space[0]));
if (dst->ret)
return;
end = (dst->pos - OFFSET(st_space[0])) / 16;
for (; start < end; start++)
access_fpreg_ia32(start, buf + 16 * start, pt, info->sw,
tos, 1);
if (dst->count == 0)
return;
}
if (dst->pos < OFFSET(padding[0]))
dst->ret = user_regset_copyin(&dst->pos, &dst->count,
&dst->u.set.kbuf, &dst->u.set.ubuf,
&info->sw->f16, OFFSET(xmm_space[0]),
OFFSET(padding[0]));
}
#undef OFFSET
static int do_regset_call(void (*call)(struct unw_frame_info *, void *),
struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct regset_getset info = { .target = target, .regset = regset,
.pos = pos, .count = count,
.u.set = { .kbuf = kbuf, .ubuf = ubuf },
.ret = 0 };
if (target == current)
unw_init_running(call, &info);
else {
struct unw_frame_info ufi;
memset(&ufi, 0, sizeof(ufi));
unw_init_from_blocked_task(&ufi, target);
(*call)(&ufi, &info);
}
return info.ret;
}
static int ia32_fpregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
return do_regset_call(do_fpregs_get, target, regset, pos, count,
kbuf, ubuf);
}
static int ia32_fpregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
return do_regset_call(do_fpregs_set, target, regset, pos, count,
kbuf, ubuf);
}
static int ia32_fpxregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
return do_regset_call(do_fpxregs_get, target, regset, pos, count,
kbuf, ubuf);
}
static int ia32_fpxregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
return do_regset_call(do_fpxregs_set, target, regset, pos, count,
kbuf, ubuf);
}
static int ia32_genregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
if (kbuf) {
u32 *kp = kbuf;
while (count > 0) {
*kp++ = getreg(target, pos);
pos += 4;
count -= 4;
}
} else {
u32 __user *up = ubuf;
while (count > 0) {
if (__put_user(getreg(target, pos), up++))
return -EFAULT;
pos += 4;
count -= 4;
}
}
return 0;
}
static int ia32_genregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int ret = 0;
if (kbuf) {
const u32 *kp = kbuf;
while (!ret && count > 0) {
putreg(target, pos, *kp++);
pos += 4;
count -= 4;
}
} else {
const u32 __user *up = ubuf;
u32 val;
while (!ret && count > 0) {
ret = __get_user(val, up++);
if (!ret)
putreg(target, pos, val);
pos += 4;
count -= 4;
}
}
return ret;
}
static int ia32_tls_active(struct task_struct *target,
const struct user_regset *regset)
{
struct thread_struct *t = &target->thread;
int n = GDT_ENTRY_TLS_ENTRIES;
while (n > 0 && desc_empty(&t->tls_array[n -1]))
--n;
return n;
}
static int ia32_tls_get(struct task_struct *target,
const struct user_regset *regset, unsigned int pos,
unsigned int count, void *kbuf, void __user *ubuf)
{
const struct desc_struct *tls;
if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) ||
(pos % sizeof(struct ia32_user_desc)) != 0 ||
(count % sizeof(struct ia32_user_desc)) != 0)
return -EINVAL;
pos /= sizeof(struct ia32_user_desc);
count /= sizeof(struct ia32_user_desc);
tls = &target->thread.tls_array[pos];
if (kbuf) {
struct ia32_user_desc *info = kbuf;
while (count-- > 0)
fill_user_desc(info++, GDT_ENTRY_TLS_MIN + pos++,
tls++);
} else {
struct ia32_user_desc __user *u_info = ubuf;
while (count-- > 0) {
struct ia32_user_desc info;
fill_user_desc(&info, GDT_ENTRY_TLS_MIN + pos++, tls++);
if (__copy_to_user(u_info++, &info, sizeof(info)))
return -EFAULT;
}
}
return 0;
}
static int ia32_tls_set(struct task_struct *target,
const struct user_regset *regset, unsigned int pos,
unsigned int count, const void *kbuf, const void __user *ubuf)
{
struct ia32_user_desc infobuf[GDT_ENTRY_TLS_ENTRIES];
const struct ia32_user_desc *info;
if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) ||
(pos % sizeof(struct ia32_user_desc)) != 0 ||
(count % sizeof(struct ia32_user_desc)) != 0)
return -EINVAL;
if (kbuf)
info = kbuf;
else if (__copy_from_user(infobuf, ubuf, count))
return -EFAULT;
else
info = infobuf;
set_tls_desc(target,
GDT_ENTRY_TLS_MIN + (pos / sizeof(struct ia32_user_desc)),
info, count / sizeof(struct ia32_user_desc));
return 0;
}
/*
* This should match arch/i386/kernel/ptrace.c:native_regsets.
* XXX ioperm? vm86?
*/
static const struct user_regset ia32_regsets[] = {
{
.core_note_type = NT_PRSTATUS,
.n = sizeof(struct user_regs_struct32)/4,
.size = 4, .align = 4,
.get = ia32_genregs_get, .set = ia32_genregs_set
},
{
.core_note_type = NT_PRFPREG,
.n = sizeof(struct ia32_user_i387_struct) / 4,
.size = 4, .align = 4,
.get = ia32_fpregs_get, .set = ia32_fpregs_set
},
{
.core_note_type = NT_PRXFPREG,
.n = sizeof(struct ia32_user_fxsr_struct) / 4,
.size = 4, .align = 4,
.get = ia32_fpxregs_get, .set = ia32_fpxregs_set
},
{
.core_note_type = NT_386_TLS,
.n = GDT_ENTRY_TLS_ENTRIES,
.bias = GDT_ENTRY_TLS_MIN,
.size = sizeof(struct ia32_user_desc),
.align = sizeof(struct ia32_user_desc),
.active = ia32_tls_active,
.get = ia32_tls_get, .set = ia32_tls_set,
},
};
const struct user_regset_view user_ia32_view = {
.name = "i386", .e_machine = EM_386,
.regsets = ia32_regsets, .n = ARRAY_SIZE(ia32_regsets)
};
long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
__u32 len_low, __u32 len_high, int advice)
{

2
arch/ia64/kernel/Makefile
View File

@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
salinfo.o semaphore.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o
obj-$(CONFIG_IA64_BRL_EMU) += brl_emu.o

4
arch/ia64/kernel/acpi.c
View File

@ -423,6 +423,7 @@ static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
static struct acpi_table_slit __initdata *slit_table;
cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
{
@ -482,6 +483,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
(pa->apic_id << 8) | (pa->local_sapic_eid);
/* nid should be overridden as logical node id later */
node_cpuid[srat_num_cpus].nid = pxm;
cpu_set(srat_num_cpus, early_cpu_possible_map);
srat_num_cpus++;
}
@ -559,7 +561,7 @@ void __init acpi_numa_arch_fixup(void)
}
/* set logical node id in cpu structure */
for (i = 0; i < srat_num_cpus; i++)
for_each_possible_early_cpu(i)
node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
printk(KERN_INFO "Number of logical nodes in system = %d\n",

13
arch/ia64/kernel/asm-offsets.c
View File

@ -7,6 +7,7 @@
#define ASM_OFFSETS_C 1
#include <linux/sched.h>
#include <linux/pid.h>
#include <linux/clocksource.h>
#include <asm-ia64/processor.h>
@ -34,17 +35,29 @@ void foo(void)
DEFINE(SIGFRAME_SIZE, sizeof (struct sigframe));
DEFINE(UNW_FRAME_INFO_SIZE, sizeof (struct unw_frame_info));
BUILD_BUG_ON(sizeof(struct upid) != 32);
DEFINE(IA64_UPID_SHIFT, 5);
BLANK();
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
DEFINE(TI_AC_STAMP, offsetof(struct thread_info, ac_stamp));
DEFINE(TI_AC_LEAVE, offsetof(struct thread_info, ac_leave));
DEFINE(TI_AC_STIME, offsetof(struct thread_info, ac_stime));
DEFINE(TI_AC_UTIME, offsetof(struct thread_info, ac_utime));
#endif
BLANK();
DEFINE(IA64_TASK_BLOCKED_OFFSET,offsetof (struct task_struct, blocked));
DEFINE(IA64_TASK_CLEAR_CHILD_TID_OFFSET,offsetof (struct task_struct, clear_child_tid));
DEFINE(IA64_TASK_GROUP_LEADER_OFFSET, offsetof (struct task_struct, group_leader));
DEFINE(IA64_TASK_TGIDLINK_OFFSET, offsetof (struct task_struct, pids[PIDTYPE_PID].pid));
DEFINE(IA64_PID_LEVEL_OFFSET, offsetof (struct pid, level));
DEFINE(IA64_PID_UPID_OFFSET, offsetof (struct pid, numbers[0]));
DEFINE(IA64_TASK_PENDING_OFFSET,offsetof (struct task_struct, pending));
DEFINE(IA64_TASK_PID_OFFSET, offsetof (struct task_struct, pid));
DEFINE(IA64_TASK_REAL_PARENT_OFFSET, offsetof (struct task_struct, real_parent));

56
arch/ia64/kernel/crash.c
View File

@ -24,6 +24,7 @@ int kdump_status[NR_CPUS];
static atomic_t kdump_cpu_frozen;
atomic_t kdump_in_progress;
static int kdump_on_init = 1;
static int kdump_on_fatal_mca = 1;
static inline Elf64_Word
*append_elf_note(Elf64_Word *buf, char *name, unsigned type, void *data,
@ -118,6 +119,7 @@ machine_crash_shutdown(struct pt_regs *pt)
static void
machine_kdump_on_init(void)
{
crash_save_vmcoreinfo();
local_irq_disable();
kexec_disable_iosapic();
machine_kexec(ia64_kimage);
@ -148,7 +150,7 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
struct ia64_mca_notify_die *nd;
struct die_args *args = data;
if (!kdump_on_init)
if (!kdump_on_init && !kdump_on_fatal_mca)
return NOTIFY_DONE;
if (!ia64_kimage) {
@ -173,32 +175,38 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
return NOTIFY_DONE;
switch (val) {
case DIE_INIT_MONARCH_PROCESS:
case DIE_INIT_MONARCH_PROCESS:
if (kdump_on_init) {
atomic_set(&kdump_in_progress, 1);
*(nd->monarch_cpu) = -1;
break;
case DIE_INIT_MONARCH_LEAVE:
}
break;
case DIE_INIT_MONARCH_LEAVE:
if (kdump_on_init)
machine_kdump_on_init();
break;
case DIE_INIT_SLAVE_LEAVE:
if (atomic_read(&kdump_in_progress))
unw_init_running(kdump_cpu_freeze, NULL);
break;
case DIE_MCA_RENDZVOUS_LEAVE:
if (atomic_read(&kdump_in_progress))
unw_init_running(kdump_cpu_freeze, NULL);
break;
case DIE_MCA_MONARCH_LEAVE:
/* die_register->signr indicate if MCA is recoverable */
if (!args->signr)
machine_kdump_on_init();
break;
break;
case DIE_INIT_SLAVE_LEAVE:
if (atomic_read(&kdump_in_progress))
unw_init_running(kdump_cpu_freeze, NULL);
break;
case DIE_MCA_RENDZVOUS_LEAVE:
if (atomic_read(&kdump_in_progress))
unw_init_running(kdump_cpu_freeze, NULL);
break;
case DIE_MCA_MONARCH_LEAVE:
/* die_register->signr indicate if MCA is recoverable */
if (kdump_on_fatal_mca && !args->signr) {
atomic_set(&kdump_in_progress, 1);
*(nd->monarch_cpu) = -1;
machine_kdump_on_init();
}
break;
}
return NOTIFY_DONE;
}
#ifdef CONFIG_SYSCTL
static ctl_table kdump_on_init_table[] = {
static ctl_table kdump_ctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "kdump_on_init",
@ -207,6 +215,14 @@ static ctl_table kdump_on_init_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "kdump_on_fatal_mca",
.data = &kdump_on_fatal_mca,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{ .ctl_name = 0 }
};
@ -215,7 +231,7 @@ static ctl_table sys_table[] = {
.ctl_name = CTL_KERN,
.procname = "kernel",
.mode = 0555,
.child = kdump_on_init_table,
.child = kdump_ctl_table,
},
{ .ctl_name = 0 }
};

46
arch/ia64/kernel/efi.c
View File

@ -37,6 +37,7 @@
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/mca.h>
#include <asm/tlbflush.h>
#define EFI_DEBUG 0
@ -403,6 +404,41 @@ efi_get_pal_addr (void)
return NULL;
}
static u8 __init palo_checksum(u8 *buffer, u32 length)
{
u8 sum = 0;
u8 *end = buffer + length;
while (buffer < end)
sum = (u8) (sum + *(buffer++));
return sum;
}
/*
* Parse and handle PALO table which is published at:
* http://www.dig64.org/home/DIG64_PALO_R1_0.pdf
*/
static void __init handle_palo(unsigned long palo_phys)
{
struct palo_table *palo = __va(palo_phys);
u8 checksum;
if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) {
printk(KERN_INFO "PALO signature incorrect.\n");
return;
}
checksum = palo_checksum((u8 *)palo, palo->length);
if (checksum) {
printk(KERN_INFO "PALO checksum incorrect.\n");
return;
}
setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO);
}
void
efi_map_pal_code (void)
{
@ -432,6 +468,7 @@ efi_init (void)
u64 efi_desc_size;
char *cp, vendor[100] = "unknown";
int i;
unsigned long palo_phys;
/*
* It's too early to be able to use the standard kernel command line
@ -496,6 +533,8 @@ efi_init (void)
efi.hcdp = EFI_INVALID_TABLE_ADDR;
efi.uga = EFI_INVALID_TABLE_ADDR;
palo_phys = EFI_INVALID_TABLE_ADDR;
for (i = 0; i < (int) efi.systab->nr_tables; i++) {
if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
efi.mps = config_tables[i].table;
@ -515,10 +554,17 @@ efi_init (void)
} else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
efi.hcdp = config_tables[i].table;
printk(" HCDP=0x%lx", config_tables[i].table);
} else if (efi_guidcmp(config_tables[i].guid,
PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID) == 0) {
palo_phys = config_tables[i].table;
printk(" PALO=0x%lx", config_tables[i].table);
}
}
printk("\n");
if (palo_phys != EFI_INVALID_TABLE_ADDR)
handle_palo(palo_phys);
runtime = __va(efi.systab->runtime);
efi.get_time = phys_get_time;
efi.set_time = phys_set_time;

65
arch/ia64/kernel/entry.S
View File

@ -710,6 +710,16 @@ ENTRY(ia64_leave_syscall)
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
#endif
.work_processed_syscall:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
adds r2=PT(LOADRS)+16,r12
(pUStk) mov.m r22=ar.itc // fetch time at leave
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
;;
(p6) ld4 r31=[r18] // load current_thread_info()->flags
ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
adds r3=PT(AR_BSPSTORE)+16,r12 // deferred
;;
#else
adds r2=PT(LOADRS)+16,r12
adds r3=PT(AR_BSPSTORE)+16,r12
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
@ -718,6 +728,7 @@ ENTRY(ia64_leave_syscall)
ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
nop.i 0
;;
#endif
mov r16=ar.bsp // M2 get existing backing store pointer
ld8 r18=[r2],PT(R9)-PT(B6) // load b6
(p6) and r15=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE?
@ -737,12 +748,21 @@ ENTRY(ia64_leave_syscall)
ld8 r29=[r2],16 // M0|1 load cr.ipsr
ld8 r28=[r3],16 // M0|1 load cr.iip
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) add r14=TI_AC_LEAVE+IA64_TASK_SIZE,r13
;;
ld8 r30=[r2],16 // M0|1 load cr.ifs
ld8 r25=[r3],16 // M0|1 load ar.unat
(pUStk) add r15=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
;;
#else
mov r22=r0 // A clear r22
;;
ld8 r30=[r2],16 // M0|1 load cr.ifs
ld8 r25=[r3],16 // M0|1 load ar.unat
(pUStk) add r14=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
;;
#endif
ld8 r26=[r2],PT(B0)-PT(AR_PFS) // M0|1 load ar.pfs
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop 0
@ -759,7 +779,11 @@ ENTRY(ia64_leave_syscall)
ld8.fill r1=[r3],16 // M0|1 load r1
(pUStk) mov r17=1 // A
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) st1 [r15]=r17 // M2|3
#else
(pUStk) st1 [r14]=r17 // M2|3
#endif
ld8.fill r13=[r3],16 // M0|1
mov f8=f0 // F clear f8
;;
@ -775,12 +799,22 @@ ENTRY(ia64_leave_syscall)
shr.u r18=r19,16 // I0|1 get byte size of existing "dirty" partition
cover // B add current frame into dirty partition & set cr.ifs
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov r19=ar.bsp // M2 get new backing store pointer
st8 [r14]=r22 // M save time at leave
mov f10=f0 // F clear f10
mov r22=r0 // A clear r22
movl r14=__kernel_syscall_via_epc // X
;;
#else
mov r19=ar.bsp // M2 get new backing store pointer
mov f10=f0 // F clear f10
nop.m 0
movl r14=__kernel_syscall_via_epc // X
;;
#endif
mov.m ar.csd=r0 // M2 clear ar.csd
mov.m ar.ccv=r0 // M2 clear ar.ccv
mov b7=r14 // I0 clear b7 (hint with __kernel_syscall_via_epc)
@ -913,10 +947,18 @@ GLOBAL_ENTRY(ia64_leave_kernel)
adds r16=PT(CR_IPSR)+16,r12
adds r17=PT(CR_IIP)+16,r12
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.pred.rel.mutex pUStk,pKStk
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
(pUStk) mov.m r22=ar.itc // M fetch time at leave
nop.i 0
;;
#else
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop.i 0
nop.i 0
;;
#endif
ld8 r29=[r16],16 // load cr.ipsr
ld8 r28=[r17],16 // load cr.iip
;;
@ -938,15 +980,37 @@ GLOBAL_ENTRY(ia64_leave_kernel)
;;
ld8.fill r12=[r16],16
ld8.fill r13=[r17],16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) adds r3=TI_AC_LEAVE+IA64_TASK_SIZE,r18
#else
(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18
#endif
;;
ld8 r20=[r16],16 // ar.fpsr
ld8.fill r15=[r17],16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 // deferred
#endif
;;
ld8.fill r14=[r16],16
ld8.fill r2=[r17]
(pUStk) mov r17=1
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mmi_ : ld8 st1 shr;; mmi_ : st8 st1 shr;;
// mib : mov add br -> mib : ld8 add br
// bbb_ : br nop cover;; mbb_ : mov br cover;;
//
// no one require bsp in r16 if (pKStk) branch is selected.
(pUStk) st8 [r3]=r22 // save time at leave
(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
shr.u r18=r19,16 // get byte size of existing "dirty" partition
;;
ld8.fill r3=[r16] // deferred
LOAD_PHYS_STACK_REG_SIZE(r17)
(pKStk) br.cond.dpnt skip_rbs_switch
mov r16=ar.bsp // get existing backing store pointer
#else
ld8.fill r3=[r16]
(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
shr.u r18=r19,16 // get byte size of existing "dirty" partition
@ -954,6 +1018,7 @@ GLOBAL_ENTRY(ia64_leave_kernel)
mov r16=ar.bsp // get existing backing store pointer
LOAD_PHYS_STACK_REG_SIZE(r17)
(pKStk) br.cond.dpnt skip_rbs_switch
#endif
/*
* Restore user backing store.

90
arch/ia64/kernel/fsys.S
View File

@ -61,13 +61,29 @@ ENTRY(fsys_getpid)
.prologue
.altrp b6
.body
add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16
;;
ld8 r17=[r17] // r17 = current->group_leader
add r9=TI_FLAGS+IA64_TASK_SIZE,r16
;;
ld4 r9=[r9]
add r8=IA64_TASK_TGID_OFFSET,r16
add r17=IA64_TASK_TGIDLINK_OFFSET,r17
;;
and r9=TIF_ALLWORK_MASK,r9
ld4 r8=[r8] // r8 = current->tgid
ld8 r17=[r17] // r17 = current->group_leader->pids[PIDTYPE_PID].pid
;;
add r8=IA64_PID_LEVEL_OFFSET,r17
;;
ld4 r8=[r8] // r8 = pid->level
add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0]
;;
shl r8=r8,IA64_UPID_SHIFT
;;
add r17=r17,r8 // r17 = &pid->numbers[pid->level]
;;
ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr
;;
mov r17=0
;;
cmp.ne p8,p0=0,r9
(p8) br.spnt.many fsys_fallback_syscall
@ -126,15 +142,25 @@ ENTRY(fsys_set_tid_address)
.altrp b6
.body
add r9=TI_FLAGS+IA64_TASK_SIZE,r16
add r17=IA64_TASK_TGIDLINK_OFFSET,r16
;;
ld4 r9=[r9]
tnat.z p6,p7=r32 // check argument register for being NaT
ld8 r17=[r17] // r17 = current->pids[PIDTYPE_PID].pid
;;
and r9=TIF_ALLWORK_MASK,r9
add r8=IA64_TASK_PID_OFFSET,r16
add r8=IA64_PID_LEVEL_OFFSET,r17
add r18=IA64_TASK_CLEAR_CHILD_TID_OFFSET,r16
;;
ld4 r8=[r8]
ld4 r8=[r8] // r8 = pid->level
add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0]
;;
shl r8=r8,IA64_UPID_SHIFT
;;
add r17=r17,r8 // r17 = &pid->numbers[pid->level]
;;
ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr
;;
cmp.ne p8,p0=0,r9
mov r17=-1
;;
@ -210,27 +236,25 @@ ENTRY(fsys_gettimeofday)
// Note that instructions are optimized for McKinley. McKinley can
// process two bundles simultaneously and therefore we continuously
// try to feed the CPU two bundles and then a stop.
//
// Additional note that code has changed a lot. Optimization is TBD.
// Comments begin with "?" are maybe outdated.
tnat.nz p6,p0 = r31 // ? branch deferred to fit later bundle
mov pr = r30,0xc000 // Set predicates according to function
add r2 = TI_FLAGS+IA64_TASK_SIZE,r16
tnat.nz p6,p0 = r31 // guard against Nat argument
(p6) br.cond.spnt.few .fail_einval
movl r20 = fsyscall_gtod_data // load fsyscall gettimeofday data address
;;
ld4 r2 = [r2] // process work pending flags
movl r29 = itc_jitter_data // itc_jitter
add r22 = IA64_GTOD_WALL_TIME_OFFSET,r20 // wall_time
ld4 r2 = [r2] // process work pending flags
;;
(p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time
add r21 = IA64_CLKSRC_MMIO_OFFSET,r20
add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29
and r2 = TIF_ALLWORK_MASK,r2
(p6) br.cond.spnt.few .fail_einval // ? deferred branch
mov pr = r30,0xc000 // Set predicates according to function
;;
add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last
and r2 = TIF_ALLWORK_MASK,r2
add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29
(p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time
;;
add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last
cmp.ne p6, p0 = 0, r2 // Fallback if work is scheduled
(p6) br.cond.spnt.many fsys_fallback_syscall
(p6) br.cond.spnt.many fsys_fallback_syscall
;;
// Begin critical section
.time_redo:
@ -258,7 +282,6 @@ ENTRY(fsys_gettimeofday)
(p8) mov r2 = ar.itc // CPU_TIMER. 36 clocks latency!!!
(p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues..
(p13) ld8 r25 = [r19] // get itc_lastcycle value
;; // ? could be removed by moving the last add upward
ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec
;;
ld8 r8 = [r22],-IA64_TIMESPEC_TV_NSEC_OFFSET // tv_nsec
@ -285,13 +308,12 @@ ENTRY(fsys_gettimeofday)
EX(.fail_efault, probe.w.fault r31, 3)
xmpy.l f8 = f8,f7 // nsec_per_cyc*(counter-last_counter)
;;
// ? simulate tbit.nz.or p7,p0 = r28,0
getf.sig r2 = f8
mf
;;
ld4 r10 = [r20] // gtod_lock.sequence
shr.u r2 = r2,r23 // shift by factor
;; // ? overloaded 3 bundles!
;;
add r8 = r8,r2 // Add xtime.nsecs
cmp4.ne p7,p0 = r28,r10
(p7) br.cond.dpnt.few .time_redo // sequence number changed, redo
@ -319,9 +341,9 @@ EX(.fail_efault, probe.w.fault r31, 3)
EX(.fail_efault, probe.w.fault r23, 3) // This also costs 5 cycles
(p14) xmpy.hu f8 = f8, f7 // xmpy has 5 cycles latency so use it
;;
mov r8 = r0
(p14) getf.sig r2 = f8
;;
mov r8 = r0
(p14) shr.u r21 = r2, 4
;;
EX(.fail_efault, st8 [r31] = r9)
@ -660,7 +682,11 @@ GLOBAL_ENTRY(fsys_bubble_down)
nop.i 0
;;
mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov.m r30=ar.itc // M get cycle for accounting
#else
nop.m 0
#endif
nop.i 0
;;
mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore
@ -682,6 +708,28 @@ GLOBAL_ENTRY(fsys_bubble_down)
cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1
br.call.sptk.many b7=ia64_syscall_setup // B
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mov.m r30=ar.itc is called in advance
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r2
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r2
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at leave kernel
;;
ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
ld8 r21=[r17] // cumulated utime
sub r22=r19,r18 // stime before leave kernel
;;
st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // update stamp
sub r18=r30,r19 // elapsed time in user mode
;;
add r20=r20,r22 // sum stime
add r21=r21,r18 // sum utime
;;
st8 [r16]=r20 // update stime
st8 [r17]=r21 // update utime
;;
#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
mov rp=r14 // I0 set the real return addr
and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A

20
arch/ia64/kernel/head.S
View File

@ -1002,6 +1002,26 @@ GLOBAL_ENTRY(sched_clock)
br.ret.sptk.many rp
END(sched_clock)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
GLOBAL_ENTRY(cycle_to_cputime)
alloc r16=ar.pfs,1,0,0,0
addl r8=THIS_CPU(cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
;;
ldf8 f8=[r8]
;;
setf.sig f9=r32
;;
xmpy.lu f10=f9,f8 // calculate low 64 bits of 128-bit product (4 cyc)
xmpy.hu f11=f9,f8 // calculate high 64 bits of 128-bit product
;;
getf.sig r8=f10 // (5 cyc)
getf.sig r9=f11
;;
shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
br.ret.sptk.many rp
END(cycle_to_cputime)
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
GLOBAL_ENTRY(start_kernel_thread)
.prologue
.save rp, r0 // this is the end of the call-chain

6
arch/ia64/kernel/ia64_ksyms.c
View File

@ -19,12 +19,6 @@ EXPORT_SYMBOL_GPL(empty_zero_page);
EXPORT_SYMBOL(ip_fast_csum); /* hand-coded assembly */
EXPORT_SYMBOL(csum_ipv6_magic);
#include <asm/semaphore.h>
EXPORT_SYMBOL(__down);
EXPORT_SYMBOL(__down_interruptible);
EXPORT_SYMBOL(__down_trylock);
EXPORT_SYMBOL(__up);
#include <asm/page.h>
EXPORT_SYMBOL(clear_page);

2
arch/ia64/kernel/irq_ia64.c
View File

@ -472,7 +472,7 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
static unsigned char count;
static long last_time;
if (jiffies - last_time > 5*HZ)
if (time_after(jiffies, last_time + 5 * HZ))
count = 0;
if (++count < 5) {
last_time = jiffies;

69
arch/ia64/kernel/ivt.S
View File

@ -805,8 +805,13 @@ ENTRY(break_fault)
(p8) adds r28=16,r28 // A switch cr.iip to next bundle
(p9) adds r8=1,r8 // A increment ei to next slot
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
;;
mov b6=r30 // I0 setup syscall handler branch reg early
#else
nop.i 0
;;
#endif
mov.m r25=ar.unat // M2 (5 cyc)
dep r29=r8,r29,41,2 // I0 insert new ei into cr.ipsr
@ -817,7 +822,11 @@ ENTRY(break_fault)
//
///////////////////////////////////////////////////////////////////////
st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov.m r30=ar.itc // M get cycle for accounting
#else
mov b6=r30 // I0 setup syscall handler branch reg early
#endif
cmp.eq pKStk,pUStk=r0,r17 // A were we on kernel stacks already?
and r9=_TIF_SYSCALL_TRACEAUDIT,r9 // A mask trace or audit
@ -829,6 +838,30 @@ ENTRY(break_fault)
cmp.eq p14,p0=r9,r0 // A are syscalls being traced/audited?
br.call.sptk.many b7=ia64_syscall_setup // B
1:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mov.m r30=ar.itc is called in advance, and r13 is current
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13 // A
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13 // A
(pKStk) br.cond.spnt .skip_accounting // B unlikely skip
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // M get last stamp
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // M time at leave
;;
ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // M cumulated stime
ld8 r21=[r17] // M cumulated utime
sub r22=r19,r18 // A stime before leave
;;
st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // M update stamp
sub r18=r30,r19 // A elapsed time in user
;;
add r20=r20,r22 // A sum stime
add r21=r21,r18 // A sum utime
;;
st8 [r16]=r20 // M update stime
st8 [r17]=r21 // M update utime
;;
.skip_accounting:
#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
nop 0
bsw.1 // B (6 cyc) regs are saved, switch to bank 1
@ -928,6 +961,7 @@ END(interrupt)
* - r27: saved ar.rsc
* - r28: saved cr.iip
* - r29: saved cr.ipsr
* - r30: ar.itc for accounting (don't touch)
* - r31: saved pr
* - b0: original contents (to be saved)
* On exit:
@ -1090,6 +1124,41 @@ END(dispatch_illegal_op_fault)
DBG_FAULT(16)
FAULT(16)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
* There is no particular reason for this code to be here, other than
* that there happens to be space here that would go unused otherwise.
* If this fault ever gets "unreserved", simply moved the following
* code to a more suitable spot...
*
* account_sys_enter is called from SAVE_MIN* macros if accounting is
* enabled and if the macro is entered from user mode.
*/
ENTRY(account_sys_enter)
// mov.m r20=ar.itc is called in advance, and r13 is current
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at left from kernel
;;
ld8 r23=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
ld8 r21=[r17] // cumulated utime
sub r22=r19,r18 // stime before leave kernel
;;
st8 [r16]=r20,TI_AC_STIME-TI_AC_STAMP // update stamp
sub r18=r20,r19 // elapsed time in user mode
;;
add r23=r23,r22 // sum stime
add r21=r21,r18 // sum utime
;;
st8 [r16]=r23 // update stime
st8 [r17]=r21 // update utime
;;
br.ret.sptk.many rp
END(account_sys_enter)
#endif
.org ia64_ivt+0x4400
/////////////////////////////////////////////////////////////////////////////////////////
// 0x4400 Entry 17 (size 64 bundles) Reserved

133
arch/ia64/kernel/kprobes.c
View File

@ -78,6 +78,20 @@ static enum instruction_type bundle_encoding[32][3] = {
{ u, u, u }, /* 1F */
};
/* Insert a long branch code */
static void __kprobes set_brl_inst(void *from, void *to)
{
s64 rel = ((s64) to - (s64) from) >> 4;
bundle_t *brl;
brl = (bundle_t *) ((u64) from & ~0xf);
brl->quad0.template = 0x05; /* [MLX](stop) */
brl->quad0.slot0 = NOP_M_INST; /* nop.m 0x0 */
brl->quad0.slot1_p0 = ((rel >> 20) & 0x7fffffffff) << 2;
brl->quad1.slot1_p1 = (((rel >> 20) & 0x7fffffffff) << 2) >> (64 - 46);
/* brl.cond.sptk.many.clr rel<<4 (qp=0) */
brl->quad1.slot2 = BRL_INST(rel >> 59, rel & 0xfffff);
}
/*
* In this function we check to see if the instruction
* is IP relative instruction and update the kprobe
@ -496,6 +510,77 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
regs->b0 = ((struct fnptr *)kretprobe_trampoline)->ip;
}
/* Check the instruction in the slot is break */
static int __kprobes __is_ia64_break_inst(bundle_t *bundle, uint slot)
{
unsigned int major_opcode;
unsigned int template = bundle->quad0.template;
unsigned long kprobe_inst;
/* Move to slot 2, if bundle is MLX type and kprobe slot is 1 */
if (slot == 1 && bundle_encoding[template][1] == L)
slot++;
/* Get Kprobe probe instruction at given slot*/
get_kprobe_inst(bundle, slot, &kprobe_inst, &major_opcode);
/* For break instruction,
* Bits 37:40 Major opcode to be zero
* Bits 27:32 X6 to be zero
* Bits 32:35 X3 to be zero
*/
if (major_opcode || ((kprobe_inst >> 27) & 0x1FF)) {
/* Not a break instruction */
return 0;
}
/* Is a break instruction */
return 1;
}
/*
* In this function, we check whether the target bundle modifies IP or
* it triggers an exception. If so, it cannot be boostable.
*/
static int __kprobes can_boost(bundle_t *bundle, uint slot,
unsigned long bundle_addr)
{
unsigned int template = bundle->quad0.template;
do {
if (search_exception_tables(bundle_addr + slot) ||
__is_ia64_break_inst(bundle, slot))
return 0; /* exception may occur in this bundle*/
} while ((++slot) < 3);
template &= 0x1e;
if (template >= 0x10 /* including B unit */ ||
template == 0x04 /* including X unit */ ||
template == 0x06) /* undefined */
return 0;
return 1;
}
/* Prepare long jump bundle and disables other boosters if need */
static void __kprobes prepare_booster(struct kprobe *p)
{
unsigned long addr = (unsigned long)p->addr & ~0xFULL;
unsigned int slot = (unsigned long)p->addr & 0xf;
struct kprobe *other_kp;
if (can_boost(&p->ainsn.insn[0].bundle, slot, addr)) {
set_brl_inst(&p->ainsn.insn[1].bundle, (bundle_t *)addr + 1);
p->ainsn.inst_flag |= INST_FLAG_BOOSTABLE;
}
/* disables boosters in previous slots */
for (; addr < (unsigned long)p->addr; addr++) {
other_kp = get_kprobe((void *)addr);
if (other_kp)
other_kp->ainsn.inst_flag &= ~INST_FLAG_BOOSTABLE;
}
}
int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
unsigned long addr = (unsigned long) p->addr;
@ -530,6 +615,8 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
prepare_break_inst(template, slot, major_opcode, kprobe_inst, p, qp);
prepare_booster(p);
return 0;
}
@ -543,7 +630,9 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
src = &p->opcode.bundle;
flush_icache_range((unsigned long)p->ainsn.insn,
(unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));
(unsigned long)p->ainsn.insn +
sizeof(kprobe_opcode_t) * MAX_INSN_SIZE);
switch (p->ainsn.slot) {
case 0:
dest->quad0.slot0 = src->quad0.slot0;
@ -584,13 +673,13 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
mutex_lock(&kprobe_mutex);
free_insn_slot(p->ainsn.insn, 0);
free_insn_slot(p->ainsn.insn, p->ainsn.inst_flag & INST_FLAG_BOOSTABLE);
mutex_unlock(&kprobe_mutex);
}
/*
* We are resuming execution after a single step fault, so the pt_regs
* structure reflects the register state after we executed the instruction
* located in the kprobe (p->ainsn.insn.bundle). We still need to adjust
* located in the kprobe (p->ainsn.insn->bundle). We still need to adjust
* the ip to point back to the original stack address. To set the IP address
* to original stack address, handle the case where we need to fixup the
* relative IP address and/or fixup branch register.
@ -607,7 +696,7 @@ static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
if (slot == 1 && bundle_encoding[template][1] == L)
slot = 2;
if (p->ainsn.inst_flag) {
if (p->ainsn.inst_flag & ~INST_FLAG_BOOSTABLE) {
if (p->ainsn.inst_flag & INST_FLAG_FIX_RELATIVE_IP_ADDR) {
/* Fix relative IP address */
@ -686,33 +775,12 @@ static void __kprobes prepare_ss(struct kprobe *p, struct pt_regs *regs)
static int __kprobes is_ia64_break_inst(struct pt_regs *regs)
{
unsigned int slot = ia64_psr(regs)->ri;
unsigned int template, major_opcode;
unsigned long kprobe_inst;
unsigned long *kprobe_addr = (unsigned long *)regs->cr_iip;
bundle_t bundle;
memcpy(&bundle, kprobe_addr, sizeof(bundle_t));
template = bundle.quad0.template;
/* Move to slot 2, if bundle is MLX type and kprobe slot is 1 */
if (slot == 1 && bundle_encoding[template][1] == L)
slot++;
/* Get Kprobe probe instruction at given slot*/
get_kprobe_inst(&bundle, slot, &kprobe_inst, &major_opcode);
/* For break instruction,
* Bits 37:40 Major opcode to be zero
* Bits 27:32 X6 to be zero
* Bits 32:35 X3 to be zero
*/
if (major_opcode || ((kprobe_inst >> 27) & 0x1FF) ) {
/* Not a break instruction */
return 0;
}
/* Is a break instruction */
return 1;
return __is_ia64_break_inst(&bundle, slot);
}
static int __kprobes pre_kprobes_handler(struct die_args *args)
@ -802,6 +870,19 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
return 1;
ss_probe:
#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) {
/* Boost up -- we can execute copied instructions directly */
ia64_psr(regs)->ri = p->ainsn.slot;
regs->cr_iip = (unsigned long)&p->ainsn.insn->bundle & ~0xFULL;
/* turn single stepping off */
ia64_psr(regs)->ss = 0;
reset_current_kprobe();
preempt_enable_no_resched();
return 1;
}
#endif
prepare_ss(p, regs);
kcb->kprobe_status = KPROBE_HIT_SS;
return 1;

60
arch/ia64/kernel/mca.c
View File

@ -69,6 +69,7 @@
* 2007-04-27 Russ Anderson <rja@sgi.com>
* Support multiple cpus going through OS_MCA in the same event.
*/
#include <linux/jiffies.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/sched.h>
@ -97,6 +98,7 @@
#include <asm/irq.h>
#include <asm/hw_irq.h>
#include <asm/tlb.h>
#include "mca_drv.h"
#include "entry.h"
@ -112,6 +114,7 @@ DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */
DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */
DEFINE_PER_CPU(u64, ia64_mca_tr_reload); /* Flag for TR reload */
unsigned long __per_cpu_mca[NR_CPUS];
@ -293,7 +296,8 @@ static void ia64_mlogbuf_dump_from_init(void)
if (mlogbuf_finished)
return;
if (mlogbuf_timestamp && (mlogbuf_timestamp + 30*HZ > jiffies)) {
if (mlogbuf_timestamp &&
time_before(jiffies, mlogbuf_timestamp + 30 * HZ)) {
printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT "
" and the system seems to be messed up.\n");
ia64_mlogbuf_finish(0);
@ -1182,6 +1186,49 @@ all_in:
return;
}
/* mca_insert_tr
*
* Switch rid when TR reload and needed!
* iord: 1: itr, 2: itr;
*
*/
static void mca_insert_tr(u64 iord)
{
int i;
u64 old_rr;
struct ia64_tr_entry *p;
unsigned long psr;
int cpu = smp_processor_id();
psr = ia64_clear_ic();
for (i = IA64_TR_ALLOC_BASE; i < IA64_TR_ALLOC_MAX; i++) {
p = &__per_cpu_idtrs[cpu][iord-1][i];
if (p->pte & 0x1) {
old_rr = ia64_get_rr(p->ifa);
if (old_rr != p->rr) {
ia64_set_rr(p->ifa, p->rr);
ia64_srlz_d();
}
ia64_ptr(iord, p->ifa, p->itir >> 2);
ia64_srlz_i();
if (iord & 0x1) {
ia64_itr(0x1, i, p->ifa, p->pte, p->itir >> 2);
ia64_srlz_i();
}
if (iord & 0x2) {
ia64_itr(0x2, i, p->ifa, p->pte, p->itir >> 2);
ia64_srlz_i();
}
if (old_rr != p->rr) {
ia64_set_rr(p->ifa, old_rr);
ia64_srlz_d();
}
}
}
ia64_set_psr(psr);
}
/*
* ia64_mca_handler
*
@ -1266,16 +1313,17 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
} else {
/* Dump buffered message to console */
ia64_mlogbuf_finish(1);
#ifdef CONFIG_KEXEC
atomic_set(&kdump_in_progress, 1);
monarch_cpu = -1;
#endif
}
if (__get_cpu_var(ia64_mca_tr_reload)) {
mca_insert_tr(0x1); /*Reload dynamic itrs*/
mca_insert_tr(0x2); /*Reload dynamic itrs*/
}
if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
== NOTIFY_STOP)
ia64_mca_spin(__func__);
if (atomic_dec_return(&mca_count) > 0) {
int i;

5
arch/ia64/kernel/mca_asm.S
View File

@ -219,8 +219,13 @@ ia64_reload_tr:
mov r20=IA64_TR_CURRENT_STACK
;;
itr.d dtr[r20]=r16
GET_THIS_PADDR(r2, ia64_mca_tr_reload)
mov r18 = 1
;;
srlz.d
;;
st8 [r2] =r18
;;
done_tlb_purge_and_reload:

14
arch/ia64/kernel/minstate.h
View File

@ -3,6 +3,18 @@
#include "entry.h"
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/* read ar.itc in advance, and use it before leaving bank 0 */
#define ACCOUNT_GET_STAMP \
(pUStk) mov.m r20=ar.itc;
#define ACCOUNT_SYS_ENTER \
(pUStk) br.call.spnt rp=account_sys_enter \
;;
#else
#define ACCOUNT_GET_STAMP
#define ACCOUNT_SYS_ENTER
#endif
/*
* DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
* the minimum state necessary that allows us to turn psr.ic back
@ -122,11 +134,13 @@
;; \
.mem.offset 0,0; st8.spill [r16]=r2,16; \
.mem.offset 8,0; st8.spill [r17]=r3,16; \
ACCOUNT_GET_STAMP \
adds r2=IA64_PT_REGS_R16_OFFSET,r1; \
;; \
EXTRA; \
movl r1=__gp; /* establish kernel global pointer */ \
;; \
ACCOUNT_SYS_ENTER \
bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
;;

2
arch/ia64/kernel/numa.c
View File

@ -73,7 +73,7 @@ void __init build_cpu_to_node_map(void)
for(node=0; node < MAX_NUMNODES; node++)
cpus_clear(node_to_cpu_mask[node]);
for(cpu = 0; cpu < NR_CPUS; ++cpu) {
for_each_possible_early_cpu(cpu) {
node = -1;
for (i = 0; i < NR_CPUS; ++i)
if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {

8
arch/ia64/kernel/patch.c
View File

@ -135,10 +135,10 @@ ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
while (offp < (s32 *) end) {
wp = (u64 *) ia64_imva((char *) offp + *offp);
wp[0] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */
wp[1] = 0x0004000000000200UL;
wp[2] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */
wp[3] = 0x0084006880000200UL;
wp[0] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */
wp[1] = 0x0084006880000200UL;
wp[2] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */
wp[3] = 0x0004000000000200UL;
ia64_fc(wp); ia64_fc(wp + 2);
++offp;
}

4
arch/ia64/kernel/perfmon.c
View File

@ -4204,10 +4204,10 @@ pfm_check_task_exist(pfm_context_t *ctx)
do_each_thread (g, t) {
if (t->thread.pfm_context == ctx) {
ret = 0;
break;
goto out;
}
} while_each_thread (g, t);
out:
read_unlock(&tasklist_lock);
DPRINT(("pfm_check_task_exist: ret=%d ctx=%p\n", ret, ctx));

30
arch/ia64/kernel/process.c
View File

@ -625,42 +625,12 @@ do_dump_fpu (struct unw_frame_info *info, void *arg)
do_dump_task_fpu(current, info, arg);
}
int
dump_task_regs(struct task_struct *task, elf_gregset_t *regs)
{
struct unw_frame_info tcore_info;
if (current == task) {
unw_init_running(do_copy_regs, regs);
} else {
memset(&tcore_info, 0, sizeof(tcore_info));
unw_init_from_blocked_task(&tcore_info, task);
do_copy_task_regs(task, &tcore_info, regs);
}
return 1;
}
void
ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
{
unw_init_running(do_copy_regs, dst);
}
int
dump_task_fpu (struct task_struct *task, elf_fpregset_t *dst)
{
struct unw_frame_info tcore_info;
if (current == task) {
unw_init_running(do_dump_fpu, dst);
} else {
memset(&tcore_info, 0, sizeof(tcore_info));
unw_init_from_blocked_task(&tcore_info, task);
do_dump_task_fpu(task, &tcore_info, dst);
}
return 1;
}
int
dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
{

1217
arch/ia64/kernel/ptrace.c
View File

File diff suppressed because it is too large Load Diff

165
arch/ia64/kernel/semaphore.c
View File

@ -1,165 +0,0 @@
/*
* IA-64 semaphore implementation (derived from x86 version).
*
* Copyright (C) 1999-2000, 2002 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
/*
* Semaphores are implemented using a two-way counter: The "count"
* variable is decremented for each process that tries to acquire the
* semaphore, while the "sleepers" variable is a count of such
* acquires.
*
* Notably, the inline "up()" and "down()" functions can efficiently
* test if they need to do any extra work (up needs to do something
* only if count was negative before the increment operation.
*
* "sleeping" and the contention routine ordering is protected
* by the spinlock in the semaphore's waitqueue head.
*
* Note that these functions are only called when there is contention
* on the lock, and as such all this is the "non-critical" part of the
* whole semaphore business. The critical part is the inline stuff in
* <asm/semaphore.h> where we want to avoid any extra jumps and calls.
*/
#include <linux/sched.h>
#include <linux/init.h>
#include <asm/errno.h>
#include <asm/semaphore.h>
/*
* Logic:
* - Only on a boundary condition do we need to care. When we go
* from a negative count to a non-negative, we wake people up.
* - When we go from a non-negative count to a negative do we
* (a) synchronize with the "sleepers" count and (b) make sure
* that we're on the wakeup list before we synchronize so that
* we cannot lose wakeup events.
*/
void
__up (struct semaphore *sem)
{
wake_up(&sem->wait);
}
void __sched __down (struct semaphore *sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_UNINTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* the wait_queue_head.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_UNINTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
}
int __sched __down_interruptible (struct semaphore * sem)
{
int retval = 0;
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_INTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers ++;
for (;;) {
int sleepers = sem->sleepers;
/*
* With signals pending, this turns into
* the trylock failure case - we won't be
* sleeping, and we* can't get the lock as
* it has contention. Just correct the count
* and exit.
*/
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
break;
}
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* wait_queue_head. The "-1" is because we're
* still hoping to get the semaphore.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_INTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
return retval;
}
/*
* Trylock failed - make sure we correct for having decremented the
* count.
*/
int
__down_trylock (struct semaphore *sem)
{
unsigned long flags;
int sleepers;
spin_lock_irqsave(&sem->wait.lock, flags);
sleepers = sem->sleepers + 1;
sem->sleepers = 0;
/*
* Add "everybody else" and us into it. They aren't
* playing, because we own the spinlock in the
* wait_queue_head.
*/
if (!atomic_add_negative(sleepers, &sem->count)) {
wake_up_locked(&sem->wait);
}
spin_unlock_irqrestore(&sem->wait.lock, flags);
return 1;
}

31
arch/ia64/kernel/setup.c
View File

@ -59,6 +59,7 @@
#include <asm/setup.h>
#include <asm/smp.h>
#include <asm/system.h>
#include <asm/tlbflush.h>
#include <asm/unistd.h>
#include <asm/hpsim.h>
@ -176,6 +177,29 @@ filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
return 0;
}
/*
* Similar to "filter_rsvd_memory()", but the reserved memory ranges
* are not filtered out.
*/
int __init
filter_memory(unsigned long start, unsigned long end, void *arg)
{
void (*func)(unsigned long, unsigned long, int);
#if IGNORE_PFN0
if (start == PAGE_OFFSET) {
printk(KERN_WARNING "warning: skipping physical page 0\n");
start += PAGE_SIZE;
if (start >= end)
return 0;
}
#endif
func = arg;
if (start < end)
call_pernode_memory(__pa(start), end - start, func);
return 0;
}
static void __init
sort_regions (struct rsvd_region *rsvd_region, int max)
{
@ -493,6 +517,8 @@ setup_arch (char **cmdline_p)
acpi_table_init();
# ifdef CONFIG_ACPI_NUMA
acpi_numa_init();
per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ?
32 : cpus_weight(early_cpu_possible_map)), additional_cpus);
# endif
#else
# ifdef CONFIG_SMP
@ -946,9 +972,10 @@ cpu_init (void)
#endif
/* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
if (ia64_pal_vm_summary(NULL, &vmi) == 0)
if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
else {
setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
} else {
printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
max_ctx = (1U << 15) - 1; /* use architected minimum */
}

82
arch/ia64/kernel/smp.c
View File

@ -209,6 +209,19 @@ send_IPI_allbutself (int op)
}
}
/*
* Called with preemption disabled.
*/
static inline void
send_IPI_mask(cpumask_t mask, int op)
{
unsigned int cpu;
for_each_cpu_mask(cpu, mask) {
send_IPI_single(cpu, op);
}
}
/*
* Called with preemption disabled.
*/
@ -401,6 +414,75 @@ smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int
}
EXPORT_SYMBOL(smp_call_function_single);
/**
* smp_call_function_mask(): Run a function on a set of other CPUs.
* <mask> The set of cpus to run on. Must not include the current cpu.
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
* <wait> If true, wait (atomically) until function
* has completed on other CPUs.
*
* Returns 0 on success, else a negative status code.
*
* If @wait is true, then returns once @func has returned; otherwise
* it returns just before the target cpu calls @func.
*
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler.
*/
int smp_call_function_mask(cpumask_t mask,
void (*func)(void *), void *info,
int wait)
{
struct call_data_struct data;
cpumask_t allbutself;
int cpus;
spin_lock(&call_lock);
allbutself = cpu_online_map;
cpu_clear(smp_processor_id(), allbutself);
cpus_and(mask, mask, allbutself);
cpus = cpus_weight(mask);
if (!cpus) {
spin_unlock(&call_lock);
return 0;
}
/* Can deadlock when called with interrupts disabled */
WARN_ON(irqs_disabled());
data.func = func;
data.info = info;
atomic_set(&data.started, 0);
data.wait = wait;
if (wait)
atomic_set(&data.finished, 0);
call_data = &data;
mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC*/
/* Send a message to other CPUs */
if (cpus_equal(mask, allbutself))
send_IPI_allbutself(IPI_CALL_FUNC);
else
send_IPI_mask(mask, IPI_CALL_FUNC);
/* Wait for response */
while (atomic_read(&data.started) != cpus)
cpu_relax();
if (wait)
while (atomic_read(&data.finished) != cpus)
cpu_relax();
call_data = NULL;
spin_unlock(&call_lock);
return 0;
}
EXPORT_SYMBOL(smp_call_function_mask);
/*
* this function sends a 'generic call function' IPI to all other CPUs
* in the system.

2
arch/ia64/kernel/smpboot.c
View File

@ -400,9 +400,9 @@ smp_callin (void)
/* Setup the per cpu irq handling data structures */
__setup_vector_irq(cpuid);
cpu_set(cpuid, cpu_online_map);
unlock_ipi_calllock();
per_cpu(cpu_state, cpuid) = CPU_ONLINE;
spin_unlock(&vector_lock);
unlock_ipi_calllock();
smp_setup_percpu_timer();

78
arch/ia64/kernel/time.c
View File

@ -59,6 +59,84 @@ static struct clocksource clocksource_itc = {
};
static struct clocksource *itc_clocksource;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
#include <linux/kernel_stat.h>
extern cputime_t cycle_to_cputime(u64 cyc);
/*
* Called from the context switch with interrupts disabled, to charge all
* accumulated times to the current process, and to prepare accounting on
* the next process.
*/
void ia64_account_on_switch(struct task_struct *prev, struct task_struct *next)
{
struct thread_info *pi = task_thread_info(prev);
struct thread_info *ni = task_thread_info(next);
cputime_t delta_stime, delta_utime;
__u64 now;
now = ia64_get_itc();
delta_stime = cycle_to_cputime(pi->ac_stime + (now - pi->ac_stamp));
account_system_time(prev, 0, delta_stime);
account_system_time_scaled(prev, delta_stime);
if (pi->ac_utime) {
delta_utime = cycle_to_cputime(pi->ac_utime);
account_user_time(prev, delta_utime);
account_user_time_scaled(prev, delta_utime);
}
pi->ac_stamp = ni->ac_stamp = now;
ni->ac_stime = ni->ac_utime = 0;
}
/*
* Account time for a transition between system, hard irq or soft irq state.
* Note that this function is called with interrupts enabled.
*/
void account_system_vtime(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
unsigned long flags;
cputime_t delta_stime;
__u64 now;
local_irq_save(flags);
now = ia64_get_itc();
delta_stime = cycle_to_cputime(ti->ac_stime + (now - ti->ac_stamp));
account_system_time(tsk, 0, delta_stime);
account_system_time_scaled(tsk, delta_stime);
ti->ac_stime = 0;
ti->ac_stamp = now;
local_irq_restore(flags);
}
/*
* Called from the timer interrupt handler to charge accumulated user time
* to the current process. Must be called with interrupts disabled.
*/
void account_process_tick(struct task_struct *p, int user_tick)
{
struct thread_info *ti = task_thread_info(p);
cputime_t delta_utime;
if (ti->ac_utime) {
delta_utime = cycle_to_cputime(ti->ac_utime);
account_user_time(p, delta_utime);
account_user_time_scaled(p, delta_utime);
ti->ac_utime = 0;
}
}
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
static irqreturn_t
timer_interrupt (int irq, void *dev_id)
{

3
arch/ia64/kernel/unaligned.c
View File

@ -13,6 +13,7 @@
* 2001/08/13 Correct size of extended floats (float_fsz) from 16 to 10 bytes.
* 2001/01/17 Add support emulation of unaligned kernel accesses.
*/
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/tty.h>
@ -1290,7 +1291,7 @@ within_logging_rate_limit (void)
{
static unsigned long count, last_time;
if (jiffies - last_time > 5*HZ)
if (time_after(jiffies, last_time + 5 * HZ))
count = 0;
if (count < 5) {
last_time = jiffies;

4
arch/ia64/mm/contig.c
View File

@ -45,8 +45,6 @@ void show_mem(void)
printk(KERN_INFO "Mem-info:\n");
show_free_areas();
printk(KERN_INFO "Free swap: %6ldkB\n",
nr_swap_pages<<(PAGE_SHIFT-10));
printk(KERN_INFO "Node memory in pages:\n");
for_each_online_pgdat(pgdat) {
unsigned long present;
@ -255,7 +253,7 @@ paging_init (void)
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_VIRTUAL_MEM_MAP
efi_memmap_walk(register_active_ranges, NULL);
efi_memmap_walk(filter_memory, register_active_ranges);
efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
if (max_gap < LARGE_GAP) {
vmem_map = (struct page *) 0;

17
arch/ia64/mm/discontig.c
View File

@ -104,7 +104,7 @@ static int __meminit early_nr_cpus_node(int node)
{
int cpu, n = 0;
for (cpu = 0; cpu < NR_CPUS; cpu++)
for_each_possible_early_cpu(cpu)
if (node == node_cpuid[cpu].nid)
n++;
@ -124,6 +124,7 @@ static unsigned long __meminit compute_pernodesize(int node)
pernodesize += node * L1_CACHE_BYTES;
pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
pernodesize = PAGE_ALIGN(pernodesize);
return pernodesize;
}
@ -142,7 +143,7 @@ static void *per_cpu_node_setup(void *cpu_data, int node)
#ifdef CONFIG_SMP
int cpu;
for (cpu = 0; cpu < NR_CPUS; cpu++) {
for_each_possible_early_cpu(cpu) {
if (node == node_cpuid[cpu].nid) {
memcpy(__va(cpu_data), __phys_per_cpu_start,
__per_cpu_end - __per_cpu_start);
@ -345,7 +346,7 @@ static void __init initialize_pernode_data(void)
#ifdef CONFIG_SMP
/* Set the node_data pointer for each per-cpu struct */
for (cpu = 0; cpu < NR_CPUS; cpu++) {
for_each_possible_early_cpu(cpu) {
node = node_cpuid[cpu].nid;
per_cpu(cpu_info, cpu).node_data = mem_data[node].node_data;
}
@ -444,7 +445,7 @@ void __init find_memory(void)
mem_data[node].min_pfn = ~0UL;
}
efi_memmap_walk(register_active_ranges, NULL);
efi_memmap_walk(filter_memory, register_active_ranges);
/*
* Initialize the boot memory maps in reverse order since that's
@ -493,13 +494,9 @@ void __cpuinit *per_cpu_init(void)
int cpu;
static int first_time = 1;
if (smp_processor_id() != 0)
return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
if (first_time) {
first_time = 0;
for (cpu = 0; cpu < NR_CPUS; cpu++)
for_each_possible_early_cpu(cpu)
per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
}
@ -522,8 +519,6 @@ void show_mem(void)
printk(KERN_INFO "Mem-info:\n");
show_free_areas();
printk(KERN_INFO "Free swap: %6ldkB\n",
nr_swap_pages<<(PAGE_SHIFT-10));
printk(KERN_INFO "Node memory in pages:\n");
for_each_online_pgdat(pgdat) {
unsigned long present;

14
arch/ia64/mm/init.c
View File

@ -58,7 +58,6 @@ __ia64_sync_icache_dcache (pte_t pte)
{
unsigned long addr;
struct page *page;
unsigned long order;
page = pte_page(pte);
addr = (unsigned long) page_address(page);
@ -66,12 +65,7 @@ __ia64_sync_icache_dcache (pte_t pte)
if (test_bit(PG_arch_1, &page->flags))
return; /* i-cache is already coherent with d-cache */
if (PageCompound(page)) {
order = compound_order(page);
flush_icache_range(addr, addr + (1UL << order << PAGE_SHIFT));
}
else
flush_icache_range(addr, addr + PAGE_SIZE);
flush_icache_range(addr, addr + (PAGE_SIZE << compound_order(page)));
set_bit(PG_arch_1, &page->flags); /* mark page as clean */
}
@ -553,12 +547,10 @@ find_largest_hole (u64 start, u64 end, void *arg)
#endif /* CONFIG_VIRTUAL_MEM_MAP */
int __init
register_active_ranges(u64 start, u64 end, void *arg)
register_active_ranges(u64 start, u64 len, int nid)
{
int nid = paddr_to_nid(__pa(start));
u64 end = start + len;
if (nid < 0)
nid = 0;
#ifdef CONFIG_KEXEC
if (start > crashk_res.start && start < crashk_res.end)
start = crashk_res.end;

4
arch/ia64/mm/numa.c
View File

@ -27,7 +27,9 @@
*/
int num_node_memblks;
struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
struct node_cpuid_s node_cpuid[NR_CPUS];
struct node_cpuid_s node_cpuid[NR_CPUS] =
{ [0 ... NR_CPUS-1] = { .phys_id = 0, .nid = NUMA_NO_NODE } };
/*
* This is a matrix with "distances" between nodes, they should be
* proportional to the memory access latency ratios.

357
arch/ia64/mm/tlb.c
View File

@ -11,6 +11,9 @@
* Rohit Seth <rohit.seth@intel.com>
* Ken Chen <kenneth.w.chen@intel.com>
* Christophe de Dinechin <ddd@hp.com>: Avoid ptc.e on memory allocation
* Copyright (C) 2007 Intel Corp
* Fenghua Yu <fenghua.yu@intel.com>
* Add multiple ptc.g/ptc.ga instruction support in global tlb purge.
*/
#include <linux/module.h>
#include <linux/init.h>
@ -26,6 +29,9 @@
#include <asm/pal.h>
#include <asm/tlbflush.h>
#include <asm/dma.h>
#include <asm/processor.h>
#include <asm/sal.h>
#include <asm/tlb.h>
static struct {
unsigned long mask; /* mask of supported purge page-sizes */
@ -39,6 +45,10 @@ struct ia64_ctx ia64_ctx = {
};
DEFINE_PER_CPU(u8, ia64_need_tlb_flush);
DEFINE_PER_CPU(u8, ia64_tr_num); /*Number of TR slots in current processor*/
DEFINE_PER_CPU(u8, ia64_tr_used); /*Max Slot number used by kernel*/
struct ia64_tr_entry __per_cpu_idtrs[NR_CPUS][2][IA64_TR_ALLOC_MAX];
/*
* Initializes the ia64_ctx.bitmap array based on max_ctx+1.
@ -84,14 +94,140 @@ wrap_mmu_context (struct mm_struct *mm)
local_flush_tlb_all();
}
/*
* Implement "spinaphores" ... like counting semaphores, but they
* spin instead of sleeping. If there are ever any other users for
* this primitive it can be moved up to a spinaphore.h header.
*/
struct spinaphore {
atomic_t cur;
};
static inline void spinaphore_init(struct spinaphore *ss, int val)
{
atomic_set(&ss->cur, val);
}
static inline void down_spin(struct spinaphore *ss)
{
while (unlikely(!atomic_add_unless(&ss->cur, -1, 0)))
while (atomic_read(&ss->cur) == 0)
cpu_relax();
}
static inline void up_spin(struct spinaphore *ss)
{
atomic_add(1, &ss->cur);
}
static struct spinaphore ptcg_sem;
static u16 nptcg = 1;
static int need_ptcg_sem = 1;
static int toolatetochangeptcgsem = 0;
/*
* Kernel parameter "nptcg=" overrides max number of concurrent global TLB
* purges which is reported from either PAL or SAL PALO.
*
* We don't have sanity checking for nptcg value. It's the user's responsibility
* for valid nptcg value on the platform. Otherwise, kernel may hang in some
* cases.
*/
static int __init
set_nptcg(char *str)
{
int value = 0;
get_option(&str, &value);
setup_ptcg_sem(value, NPTCG_FROM_KERNEL_PARAMETER);
return 1;
}
__setup("nptcg=", set_nptcg);
/*
* Maximum number of simultaneous ptc.g purges in the system can
* be defined by PAL_VM_SUMMARY (in which case we should take
* the smallest value for any cpu in the system) or by the PAL
* override table (in which case we should ignore the value from
* PAL_VM_SUMMARY).
*
* Kernel parameter "nptcg=" overrides maximum number of simultanesous ptc.g
* purges defined in either PAL_VM_SUMMARY or PAL override table. In this case,
* we should ignore the value from either PAL_VM_SUMMARY or PAL override table.
*
* Complicating the logic here is the fact that num_possible_cpus()
* isn't fully setup until we start bringing cpus online.
*/
void
setup_ptcg_sem(int max_purges, int nptcg_from)
{
static int kp_override;
static int palo_override;
static int firstcpu = 1;
if (toolatetochangeptcgsem) {
BUG_ON(max_purges < nptcg);
return;
}
if (nptcg_from == NPTCG_FROM_KERNEL_PARAMETER) {
kp_override = 1;
nptcg = max_purges;
goto resetsema;
}
if (kp_override) {
need_ptcg_sem = num_possible_cpus() > nptcg;
return;
}
if (nptcg_from == NPTCG_FROM_PALO) {
palo_override = 1;
/* In PALO max_purges == 0 really means it! */
if (max_purges == 0)
panic("Whoa! Platform does not support global TLB purges.\n");
nptcg = max_purges;
if (nptcg == PALO_MAX_TLB_PURGES) {
need_ptcg_sem = 0;
return;
}
goto resetsema;
}
if (palo_override) {
if (nptcg != PALO_MAX_TLB_PURGES)
need_ptcg_sem = (num_possible_cpus() > nptcg);
return;
}
/* In PAL_VM_SUMMARY max_purges == 0 actually means 1 */
if (max_purges == 0) max_purges = 1;
if (firstcpu) {
nptcg = max_purges;
firstcpu = 0;
}
if (max_purges < nptcg)
nptcg = max_purges;
if (nptcg == PAL_MAX_PURGES) {
need_ptcg_sem = 0;
return;
} else
need_ptcg_sem = (num_possible_cpus() > nptcg);
resetsema:
spinaphore_init(&ptcg_sem, max_purges);
}
void
ia64_global_tlb_purge (struct mm_struct *mm, unsigned long start,
unsigned long end, unsigned long nbits)
{
static DEFINE_SPINLOCK(ptcg_lock);
struct mm_struct *active_mm = current->active_mm;
toolatetochangeptcgsem = 1;
if (mm != active_mm) {
/* Restore region IDs for mm */
if (mm && active_mm) {
@ -102,19 +238,20 @@ ia64_global_tlb_purge (struct mm_struct *mm, unsigned long start,
}
}
/* HW requires global serialization of ptc.ga. */
spin_lock(&ptcg_lock);
{
do {
/*
* Flush ALAT entries also.
*/
ia64_ptcga(start, (nbits<<2));
ia64_srlz_i();
start += (1UL << nbits);
} while (start < end);
}
spin_unlock(&ptcg_lock);
if (need_ptcg_sem)
down_spin(&ptcg_sem);
do {
/*
* Flush ALAT entries also.
*/
ia64_ptcga(start, (nbits << 2));
ia64_srlz_i();
start += (1UL << nbits);
} while (start < end);
if (need_ptcg_sem)
up_spin(&ptcg_sem);
if (mm != active_mm) {
activate_context(active_mm);
@ -190,6 +327,9 @@ ia64_tlb_init (void)
ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */
unsigned long tr_pgbits;
long status;
pal_vm_info_1_u_t vm_info_1;
pal_vm_info_2_u_t vm_info_2;
int cpu = smp_processor_id();
if ((status = ia64_pal_vm_page_size(&tr_pgbits, &purge.mask)) != 0) {
printk(KERN_ERR "PAL_VM_PAGE_SIZE failed with status=%ld; "
@ -206,4 +346,191 @@ ia64_tlb_init (void)
local_cpu_data->ptce_stride[1] = ptce_info.stride[1];
local_flush_tlb_all(); /* nuke left overs from bootstrapping... */
status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2);
if (status) {
printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
per_cpu(ia64_tr_num, cpu) = 8;
return;
}
per_cpu(ia64_tr_num, cpu) = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
if (per_cpu(ia64_tr_num, cpu) >
(vm_info_1.pal_vm_info_1_s.max_dtr_entry+1))
per_cpu(ia64_tr_num, cpu) =
vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
if (per_cpu(ia64_tr_num, cpu) > IA64_TR_ALLOC_MAX) {
per_cpu(ia64_tr_num, cpu) = IA64_TR_ALLOC_MAX;
printk(KERN_DEBUG "TR register number exceeds IA64_TR_ALLOC_MAX!"
"IA64_TR_ALLOC_MAX should be extended\n");
}
}
/*
* is_tr_overlap
*
* Check overlap with inserted TRs.
*/
static int is_tr_overlap(struct ia64_tr_entry *p, u64 va, u64 log_size)
{
u64 tr_log_size;
u64 tr_end;
u64 va_rr = ia64_get_rr(va);
u64 va_rid = RR_TO_RID(va_rr);
u64 va_end = va + (1<<log_size) - 1;
if (va_rid != RR_TO_RID(p->rr))
return 0;
tr_log_size = (p->itir & 0xff) >> 2;
tr_end = p->ifa + (1<<tr_log_size) - 1;
if (va > tr_end || p->ifa > va_end)
return 0;
return 1;
}
/*
* ia64_insert_tr in virtual mode. Allocate a TR slot
*
* target_mask : 0x1 : itr, 0x2 : dtr, 0x3 : idtr
*
* va : virtual address.
* pte : pte entries inserted.
* log_size: range to be covered.
*
* Return value: <0 : error No.
*
* >=0 : slot number allocated for TR.
* Must be called with preemption disabled.
*/
int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size)
{
int i, r;
unsigned long psr;
struct ia64_tr_entry *p;
int cpu = smp_processor_id();
r = -EINVAL;
/*Check overlap with existing TR entries*/
if (target_mask & 0x1) {
p = &__per_cpu_idtrs[cpu][0][0];
for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu);
i++, p++) {
if (p->pte & 0x1)
if (is_tr_overlap(p, va, log_size)) {
printk(KERN_DEBUG "Overlapped Entry"
"Inserted for TR Reigster!!\n");
goto out;
}
}
}
if (target_mask & 0x2) {
p = &__per_cpu_idtrs[cpu][1][0];
for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu);
i++, p++) {
if (p->pte & 0x1)
if (is_tr_overlap(p, va, log_size)) {
printk(KERN_DEBUG "Overlapped Entry"
"Inserted for TR Reigster!!\n");
goto out;
}
}
}
for (i = IA64_TR_ALLOC_BASE; i < per_cpu(ia64_tr_num, cpu); i++) {
switch (target_mask & 0x3) {
case 1:
if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1))
goto found;
continue;
case 2:
if (!(__per_cpu_idtrs[cpu][1][i].pte & 0x1))
goto found;
continue;
case 3:
if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1) &&
!(__per_cpu_idtrs[cpu][1][i].pte & 0x1))
goto found;
continue;
default:
r = -EINVAL;
goto out;
}
}
found:
if (i >= per_cpu(ia64_tr_num, cpu))
return -EBUSY;
/*Record tr info for mca hander use!*/
if (i > per_cpu(ia64_tr_used, cpu))
per_cpu(ia64_tr_used, cpu) = i;
psr = ia64_clear_ic();
if (target_mask & 0x1) {
ia64_itr(0x1, i, va, pte, log_size);
ia64_srlz_i();
p = &__per_cpu_idtrs[cpu][0][i];
p->ifa = va;
p->pte = pte;
p->itir = log_size << 2;
p->rr = ia64_get_rr(va);
}
if (target_mask & 0x2) {
ia64_itr(0x2, i, va, pte, log_size);
ia64_srlz_i();
p = &__per_cpu_idtrs[cpu][1][i];
p->ifa = va;
p->pte = pte;
p->itir = log_size << 2;
p->rr = ia64_get_rr(va);
}
ia64_set_psr(psr);
r = i;
out:
return r;
}
EXPORT_SYMBOL_GPL(ia64_itr_entry);
/*
* ia64_purge_tr
*
* target_mask: 0x1: purge itr, 0x2 : purge dtr, 0x3 purge idtr.
* slot: slot number to be freed.
*
* Must be called with preemption disabled.
*/
void ia64_ptr_entry(u64 target_mask, int slot)
{
int cpu = smp_processor_id();
int i;
struct ia64_tr_entry *p;
if (slot < IA64_TR_ALLOC_BASE || slot >= per_cpu(ia64_tr_num, cpu))
return;
if (target_mask & 0x1) {
p = &__per_cpu_idtrs[cpu][0][slot];
if ((p->pte&0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) {
p->pte = 0;
ia64_ptr(0x1, p->ifa, p->itir>>2);
ia64_srlz_i();
}
}
if (target_mask & 0x2) {
p = &__per_cpu_idtrs[cpu][1][slot];
if ((p->pte & 0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) {
p->pte = 0;
ia64_ptr(0x2, p->ifa, p->itir>>2);
ia64_srlz_i();
}
}
for (i = per_cpu(ia64_tr_used, cpu); i >= IA64_TR_ALLOC_BASE; i--) {
if ((__per_cpu_idtrs[cpu][0][i].pte & 0x1) ||
(__per_cpu_idtrs[cpu][1][i].pte & 0x1))
break;
}
per_cpu(ia64_tr_used, cpu) = i;
}
EXPORT_SYMBOL_GPL(ia64_ptr_entry);

7
arch/ia64/pci/pci.c
View File

@ -362,7 +362,12 @@ pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
info.name = name;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window,
&info);
/*
* See arch/x86/pci/acpi.c.
* The desired pci bus might already be scanned in a quirk. We
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller);
if (pbus)
pcibios_setup_root_windows(pbus, controller);

8
arch/ia64/sn/kernel/xpc_main.c
View File

@ -199,7 +199,7 @@ xpc_timeout_partition_disengage_request(unsigned long data)
struct xpc_partition *part = (struct xpc_partition *) data;
DBUG_ON(jiffies < part->disengage_request_timeout);
DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
(void) xpc_partition_disengaged(part);
@ -230,7 +230,7 @@ xpc_hb_beater(unsigned long dummy)
{
xpc_vars->heartbeat++;
if (jiffies >= xpc_hb_check_timeout) {
if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
wake_up_interruptible(&xpc_act_IRQ_wq);
}
@ -270,7 +270,7 @@ xpc_hb_checker(void *ignore)
/* checking of remote heartbeats is skewed by IRQ handling */
if (jiffies >= xpc_hb_check_timeout) {
if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
dev_dbg(xpc_part, "checking remote heartbeats\n");
xpc_check_remote_hb();
@ -305,7 +305,7 @@ xpc_hb_checker(void *ignore)
/* wait for IRQ or timeout */
(void) wait_event_interruptible(xpc_act_IRQ_wq,
(last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
jiffies >= xpc_hb_check_timeout ||
time_after_eq(jiffies, xpc_hb_check_timeout) ||
(volatile int) xpc_exiting));
}

2
arch/ia64/sn/kernel/xpc_partition.c
View File

@ -877,7 +877,7 @@ xpc_partition_disengaged(struct xpc_partition *part)
disengaged = (xpc_partition_engaged(1UL << partid) == 0);
if (part->disengage_request_timeout) {
if (!disengaged) {
if (jiffies < part->disengage_request_timeout) {
if (time_before(jiffies, part->disengage_request_timeout)) {
/* timelimit hasn't been reached yet */
return 0;
}

2
arch/m32r/kernel/Makefile
View File

@ -5,7 +5,7 @@
extra-y := head.o init_task.o vmlinux.lds
obj-y := process.o entry.o traps.o align.o irq.o setup.o time.o \
m32r_ksyms.o sys_m32r.o semaphore.o signal.o ptrace.o
m32r_ksyms.o sys_m32r.o signal.o ptrace.o
obj-$(CONFIG_SMP) += smp.o smpboot.o
obj-$(CONFIG_MODULES) += module.o

5
arch/m32r/kernel/m32r_ksyms.c
View File

@ -7,7 +7,6 @@
#include <linux/interrupt.h>
#include <linux/string.h>
#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@ -22,10 +21,6 @@ EXPORT_SYMBOL(dump_fpu);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(__down);
EXPORT_SYMBOL(__down_interruptible);
EXPORT_SYMBOL(__up);
EXPORT_SYMBOL(__down_trylock);
/* Networking helper routines. */
/* Delay loops */

185
arch/m32r/kernel/semaphore.c
View File

@ -1,185 +0,0 @@
/*
* linux/arch/m32r/semaphore.c
* orig : i386 2.6.4
*
* M32R semaphore implementation.
*
* Copyright (c) 2002 - 2004 Hitoshi Yamamoto
*/
/*
* i386 semaphore implementation.
*
* (C) Copyright 1999 Linus Torvalds
*
* Portions Copyright 1999 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* rw semaphores implemented November 1999 by Benjamin LaHaise <bcrl@kvack.org>
*/
#include <linux/sched.h>
#include <linux/err.h>
#include <linux/init.h>
#include <asm/semaphore.h>
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to acquire the semaphore, while the "sleeping"
* variable is a count of such acquires.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* "sleeping" and the contention routine ordering is protected
* by the spinlock in the semaphore's waitqueue head.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
/*
* Logic:
* - only on a boundary condition do we need to care. When we go
* from a negative count to a non-negative, we wake people up.
* - when we go from a non-negative count to a negative do we
* (a) synchronize with the "sleeper" count and (b) make sure
* that we're on the wakeup list before we synchronize so that
* we cannot lose wakeup events.
*/
asmlinkage void __up(struct semaphore *sem)
{
wake_up(&sem->wait);
}
asmlinkage void __sched __down(struct semaphore * sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_UNINTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* the wait_queue_head.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_UNINTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
}
asmlinkage int __sched __down_interruptible(struct semaphore * sem)
{
int retval = 0;
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
unsigned long flags;
tsk->state = TASK_INTERRUPTIBLE;
spin_lock_irqsave(&sem->wait.lock, flags);
add_wait_queue_exclusive_locked(&sem->wait, &wait);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* With signals pending, this turns into
* the trylock failure case - we won't be
* sleeping, and we* can't get the lock as
* it has contention. Just correct the count
* and exit.
*/
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
break;
}
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock in
* wait_queue_head. The "-1" is because we're
* still hoping to get the semaphore.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irqrestore(&sem->wait.lock, flags);
schedule();
spin_lock_irqsave(&sem->wait.lock, flags);
tsk->state = TASK_INTERRUPTIBLE;
}
remove_wait_queue_locked(&sem->wait, &wait);
wake_up_locked(&sem->wait);
spin_unlock_irqrestore(&sem->wait.lock, flags);
tsk->state = TASK_RUNNING;
return retval;
}
/*
* Trylock failed - make sure we correct for
* having decremented the count.
*
* We could have done the trylock with a
* single "cmpxchg" without failure cases,
* but then it wouldn't work on a 386.
*/
asmlinkage int __down_trylock(struct semaphore * sem)
{
int sleepers;
unsigned long flags;
spin_lock_irqsave(&sem->wait.lock, flags);
sleepers = sem->sleepers + 1;
sem->sleepers = 0;
/*
* Add "everybody else" and us into it. They aren't
* playing, because we own the spinlock in the
* wait_queue_head.
*/
if (!atomic_add_negative(sleepers, &sem->count)) {
wake_up_locked(&sem->wait);
}
spin_unlock_irqrestore(&sem->wait.lock, flags);
return 1;
}

2
arch/m68k/kernel/Makefile
View File

@ -10,7 +10,7 @@ endif
extra-y += vmlinux.lds
obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o devres.o
sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
devres-y = ../../../kernel/irq/devres.o

6
arch/m68k/kernel/m68k_ksyms.c
View File

@ -1,5 +1,4 @@
#include <linux/module.h>
#include <asm/semaphore.h>
asmlinkage long long __ashldi3 (long long, int);
asmlinkage long long __ashrdi3 (long long, int);
@ -15,8 +14,3 @@ EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__muldi3);
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_failed_interruptible);
EXPORT_SYMBOL(__down_failed_trylock);
EXPORT_SYMBOL(__up_wakeup);

132
arch/m68k/kernel/semaphore.c
View File

@ -1,132 +0,0 @@
/*
* Generic semaphore code. Buyer beware. Do your own
* specific changes in <asm/semaphore-helper.h>
*/
#include <linux/sched.h>
#include <linux/init.h>
#include <asm/semaphore-helper.h>
#ifndef CONFIG_RMW_INSNS
spinlock_t semaphore_wake_lock;
#endif
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to sleep, while the "waking" variable is
* incremented when the "up()" code goes to wake up waiting
* processes.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* waking_non_zero() (from asm/semaphore.h) must execute
* atomically.
*
* When __up() is called, the count was negative before
* incrementing it, and we need to wake up somebody.
*
* This routine adds one to the count of processes that need to
* wake up and exit. ALL waiting processes actually wake up but
* only the one that gets to the "waking" field first will gate
* through and acquire the semaphore. The others will go back
* to sleep.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
void __up(struct semaphore *sem)
{
wake_one_more(sem);
wake_up(&sem->wait);
}
/*
* Perform the "down" function. Return zero for semaphore acquired,
* return negative for signalled out of the function.
*
* If called from __down, the return is ignored and the wait loop is
* not interruptible. This means that a task waiting on a semaphore
* using "down()" cannot be killed until someone does an "up()" on
* the semaphore.
*
* If called from __down_interruptible, the return value gets checked
* upon return. If the return value is negative then the task continues
* with the negative value in the return register (it can be tested by
* the caller).
*
* Either form may be used in conjunction with "up()".
*
*/
#define DOWN_HEAD(task_state) \
\
\
current->state = (task_state); \
add_wait_queue(&sem->wait, &wait); \
\
/* \
* Ok, we're set up. sem->count is known to be less than zero \
* so we must wait. \
* \
* We can let go the lock for purposes of waiting. \
* We re-acquire it after awaking so as to protect \
* all semaphore operations. \
* \
* If "up()" is called before we call waking_non_zero() then \
* we will catch it right away. If it is called later then \
* we will have to go through a wakeup cycle to catch it. \
* \
* Multiple waiters contend for the semaphore lock to see \
* who gets to gate through and who has to wait some more. \
*/ \
for (;;) {
#define DOWN_TAIL(task_state) \
current->state = (task_state); \
} \
current->state = TASK_RUNNING; \
remove_wait_queue(&sem->wait, &wait);
void __sched __down(struct semaphore * sem)
{
DECLARE_WAITQUEUE(wait, current);
DOWN_HEAD(TASK_UNINTERRUPTIBLE)
if (waking_non_zero(sem))
break;
schedule();
DOWN_TAIL(TASK_UNINTERRUPTIBLE)
}
int __sched __down_interruptible(struct semaphore * sem)
{
DECLARE_WAITQUEUE(wait, current);
int ret = 0;
DOWN_HEAD(TASK_INTERRUPTIBLE)
ret = waking_non_zero_interruptible(sem, current);
if (ret)
{
if (ret == 1)
/* ret != 0 only if we get interrupted -arca */
ret = 0;
break;
}
schedule();
DOWN_TAIL(TASK_INTERRUPTIBLE)
return ret;
}
int __down_trylock(struct semaphore * sem)
{
return waking_non_zero_trylock(sem);
}

2
arch/m68k/lib/Makefile
View File

@ -5,4 +5,4 @@
EXTRA_AFLAGS := -traditional
lib-y := ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
checksum.o string.o semaphore.o uaccess.o
checksum.o string.o uaccess.o

53
arch/m68k/lib/semaphore.S
View File

@ -1,53 +0,0 @@
/*
* linux/arch/m68k/lib/semaphore.S
*
* Copyright (C) 1996 Linus Torvalds
*
* m68k version by Andreas Schwab
*/
#include <linux/linkage.h>
#include <asm/semaphore.h>
/*
* The semaphore operations have a special calling sequence that
* allow us to do a simpler in-line version of them. These routines
* need to convert that sequence back into the C sequence when
* there is contention on the semaphore.
*/
ENTRY(__down_failed)
moveml %a0/%d0/%d1,-(%sp)
movel %a1,-(%sp)
jbsr __down
movel (%sp)+,%a1
moveml (%sp)+,%a0/%d0/%d1
rts
ENTRY(__down_failed_interruptible)
movel %a0,-(%sp)
movel %d1,-(%sp)
movel %a1,-(%sp)
jbsr __down_interruptible
movel (%sp)+,%a1
movel (%sp)+,%d1
movel (%sp)+,%a0
rts
ENTRY(__down_failed_trylock)
movel %a0,-(%sp)
movel %d1,-(%sp)
movel %a1,-(%sp)
jbsr __down_trylock
movel (%sp)+,%a1
movel (%sp)+,%d1
movel (%sp)+,%a0
rts
ENTRY(__up_wakeup)
moveml %a0/%d0/%d1,-(%sp)
movel %a1,-(%sp)
jbsr __up
movel (%sp)+,%a1
moveml (%sp)+,%a0/%d0/%d1
rts

2
arch/m68knommu/kernel/Makefile
View File

@ -5,7 +5,7 @@
extra-y := vmlinux.lds
obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \
semaphore.o setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_COMEMPCI) += comempci.o

6
arch/m68knommu/kernel/m68k_ksyms.c
View File

@ -13,7 +13,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/current.h>
@ -39,11 +38,6 @@ EXPORT_SYMBOL(csum_partial_copy_nocheck);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_failed_interruptible);
EXPORT_SYMBOL(__down_failed_trylock);
EXPORT_SYMBOL(__up_wakeup);
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that

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