License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-17 06:20:36 +08:00
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/*
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2006-10-04 05:01:26 +08:00
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* linux/arch/m68k/mm/motorola.c
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2005-04-17 06:20:36 +08:00
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*
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* Routines specific to the Motorola MMU, originally from:
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* linux/arch/m68k/init.c
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* which are Copyright (C) 1995 Hamish Macdonald
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*
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* Moved 8/20/1999 Sam Creasey
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*/
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/init.h>
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2018-07-04 14:28:16 +08:00
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#include <linux/memblock.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/gfp.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/setup.h>
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2016-12-25 03:46:01 +08:00
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#include <linux/uaccess.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#ifdef CONFIG_ATARI
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#include <asm/atari_stram.h>
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#endif
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2008-12-21 19:03:37 +08:00
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#include <asm/sections.h>
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2005-04-17 06:20:36 +08:00
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#undef DEBUG
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#ifndef mm_cachebits
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/*
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* Bits to add to page descriptors for "normal" caching mode.
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* For 68020/030 this is 0.
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* For 68040, this is _PAGE_CACHE040 (cachable, copyback)
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*/
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unsigned long mm_cachebits;
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EXPORT_SYMBOL(mm_cachebits);
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#endif
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|
2020-01-31 20:45:34 +08:00
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/*
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* Motorola 680x0 user's manual recommends using uncached memory for address
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* translation tables.
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*
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* Seeing how the MMU can be external on (some of) these chips, that seems like
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* a very important recommendation to follow. Provide some helpers to combat
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* 'variation' amongst the users of this.
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*/
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void mmu_page_ctor(void *page)
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{
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__flush_page_to_ram(page);
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flush_tlb_kernel_page(page);
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nocache_page(page);
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}
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void mmu_page_dtor(void *page)
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{
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cache_page(page);
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}
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2020-01-31 20:45:35 +08:00
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/* ++andreas: {get,free}_pointer_table rewritten to use unused fields from
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struct page instead of separately kmalloced struct. Stolen from
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arch/sparc/mm/srmmu.c ... */
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typedef struct list_head ptable_desc;
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2020-01-31 20:45:39 +08:00
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static struct list_head ptable_list[2] = {
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LIST_HEAD_INIT(ptable_list[0]),
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LIST_HEAD_INIT(ptable_list[1]),
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};
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2020-01-31 20:45:35 +08:00
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#define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page(page)->lru))
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#define PD_PAGE(ptable) (list_entry(ptable, struct page, lru))
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2020-01-31 20:45:39 +08:00
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#define PD_MARKBITS(dp) (*(unsigned int *)&PD_PAGE(dp)->index)
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static const int ptable_shift[2] = {
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7+2, /* PGD, PMD */
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6+2, /* PTE */
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};
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2020-01-31 20:45:35 +08:00
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2020-01-31 20:45:39 +08:00
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#define ptable_size(type) (1U << ptable_shift[type])
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#define ptable_mask(type) ((1U << (PAGE_SIZE / ptable_size(type))) - 1)
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2020-01-31 20:45:35 +08:00
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2020-01-31 20:45:39 +08:00
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void __init init_pointer_table(void *table, int type)
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2020-01-31 20:45:35 +08:00
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{
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ptable_desc *dp;
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2020-01-31 20:45:39 +08:00
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unsigned long ptable = (unsigned long)table;
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2020-01-31 20:45:35 +08:00
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unsigned long page = ptable & PAGE_MASK;
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2020-01-31 20:45:39 +08:00
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unsigned int mask = 1U << ((ptable - page)/ptable_size(type));
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2020-01-31 20:45:35 +08:00
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dp = PD_PTABLE(page);
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if (!(PD_MARKBITS(dp) & mask)) {
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2020-01-31 20:45:39 +08:00
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PD_MARKBITS(dp) = ptable_mask(type);
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list_add(dp, &ptable_list[type]);
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2020-01-31 20:45:35 +08:00
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}
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PD_MARKBITS(dp) &= ~mask;
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pr_debug("init_pointer_table: %lx, %x\n", ptable, PD_MARKBITS(dp));
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/* unreserve the page so it's possible to free that page */
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__ClearPageReserved(PD_PAGE(dp));
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init_page_count(PD_PAGE(dp));
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return;
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}
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2020-01-31 20:45:39 +08:00
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void *get_pointer_table(int type)
|
2020-01-31 20:45:35 +08:00
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{
|
2020-01-31 20:45:39 +08:00
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ptable_desc *dp = ptable_list[type].next;
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unsigned int mask = list_empty(&ptable_list[type]) ? 0 : PD_MARKBITS(dp);
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unsigned int tmp, off;
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2020-01-31 20:45:35 +08:00
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/*
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* For a pointer table for a user process address space, a
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* table is taken from a page allocated for the purpose. Each
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* page can hold 8 pointer tables. The page is remapped in
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* virtual address space to be noncacheable.
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*/
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if (mask == 0) {
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void *page;
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ptable_desc *new;
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if (!(page = (void *)get_zeroed_page(GFP_KERNEL)))
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return NULL;
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2020-01-31 20:45:39 +08:00
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if (type == TABLE_PTE) {
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/*
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* m68k doesn't have SPLIT_PTE_PTLOCKS for not having
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* SMP.
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*/
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pgtable_pte_page_ctor(virt_to_page(page));
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}
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2020-01-31 20:45:35 +08:00
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mmu_page_ctor(page);
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new = PD_PTABLE(page);
|
2020-01-31 20:45:39 +08:00
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PD_MARKBITS(new) = ptable_mask(type) - 1;
|
2020-01-31 20:45:35 +08:00
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list_add_tail(new, dp);
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return (pmd_t *)page;
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}
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|
2020-01-31 20:45:39 +08:00
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for (tmp = 1, off = 0; (mask & tmp) == 0; tmp <<= 1, off += ptable_size(type))
|
2020-01-31 20:45:35 +08:00
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;
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PD_MARKBITS(dp) = mask & ~tmp;
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if (!PD_MARKBITS(dp)) {
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/* move to end of list */
|
2020-01-31 20:45:39 +08:00
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list_move_tail(dp, &ptable_list[type]);
|
2020-01-31 20:45:35 +08:00
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}
|
2020-01-31 20:45:39 +08:00
|
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return page_address(PD_PAGE(dp)) + off;
|
2020-01-31 20:45:35 +08:00
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}
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|
2020-01-31 20:45:39 +08:00
|
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int free_pointer_table(void *table, int type)
|
2020-01-31 20:45:35 +08:00
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{
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ptable_desc *dp;
|
2020-01-31 20:45:39 +08:00
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unsigned long ptable = (unsigned long)table;
|
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unsigned long page = ptable & PAGE_MASK;
|
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unsigned int mask = 1U << ((ptable - page)/ptable_size(type));
|
2020-01-31 20:45:35 +08:00
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dp = PD_PTABLE(page);
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if (PD_MARKBITS (dp) & mask)
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panic ("table already free!");
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PD_MARKBITS (dp) |= mask;
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|
2020-01-31 20:45:39 +08:00
|
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if (PD_MARKBITS(dp) == ptable_mask(type)) {
|
2020-01-31 20:45:35 +08:00
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/* all tables in page are free, free page */
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list_del(dp);
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mmu_page_dtor((void *)page);
|
2020-01-31 20:45:39 +08:00
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if (type == TABLE_PTE)
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pgtable_pte_page_dtor(virt_to_page(page));
|
2020-01-31 20:45:35 +08:00
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free_page (page);
|
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return 1;
|
2020-01-31 20:45:39 +08:00
|
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} else if (ptable_list[type].next != dp) {
|
2020-01-31 20:45:35 +08:00
|
|
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/*
|
|
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* move this descriptor to the front of the list, since
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* it has one or more free tables.
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*/
|
2020-01-31 20:45:39 +08:00
|
|
|
list_move(dp, &ptable_list[type]);
|
2020-01-31 20:45:35 +08:00
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2007-05-31 15:40:54 +08:00
|
|
|
/* size of memory already mapped in head.S */
|
2014-04-24 18:24:48 +08:00
|
|
|
extern __initdata unsigned long m68k_init_mapped_size;
|
2007-05-31 15:40:54 +08:00
|
|
|
|
|
|
|
|
extern unsigned long availmem;
|
|
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
static pte_t *last_pte_table __initdata = NULL;
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
static pte_t * __init kernel_page_table(void)
|
|
|
|
|
{
|
2020-01-31 20:45:37 +08:00
|
|
|
pte_t *pte_table = last_pte_table;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
if (((unsigned long)last_pte_table & ~PAGE_MASK) == 0) {
|
|
|
|
|
pte_table = (pte_t *)memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
|
|
|
|
|
if (!pte_table) {
|
|
|
|
|
panic("%s: Failed to allocate %lu bytes align=%lx\n",
|
|
|
|
|
__func__, PAGE_SIZE, PAGE_SIZE);
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
clear_page(pte_table);
|
|
|
|
|
mmu_page_ctor(pte_table);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
last_pte_table = pte_table;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
last_pte_table += PTRS_PER_PTE;
|
|
|
|
|
|
|
|
|
|
return pte_table;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
static pmd_t *last_pmd_table __initdata = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
static pmd_t * __init kernel_ptr_table(void)
|
|
|
|
|
{
|
2020-01-31 20:45:37 +08:00
|
|
|
if (!last_pmd_table) {
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned long pmd, last;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* Find the last ptr table that was used in head.S and
|
|
|
|
|
* reuse the remaining space in that page for further
|
|
|
|
|
* ptr tables.
|
|
|
|
|
*/
|
|
|
|
|
last = (unsigned long)kernel_pg_dir;
|
|
|
|
|
for (i = 0; i < PTRS_PER_PGD; i++) {
|
2019-12-05 08:53:59 +08:00
|
|
|
pud_t *pud = (pud_t *)(&kernel_pg_dir[i]);
|
|
|
|
|
|
|
|
|
|
if (!pud_present(*pud))
|
2005-04-17 06:20:36 +08:00
|
|
|
continue;
|
2019-12-05 08:53:59 +08:00
|
|
|
pmd = pgd_page_vaddr(kernel_pg_dir[i]);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (pmd > last)
|
|
|
|
|
last = pmd;
|
|
|
|
|
}
|
|
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
last_pmd_table = (pmd_t *)last;
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifdef DEBUG
|
2020-01-31 20:45:37 +08:00
|
|
|
printk("kernel_ptr_init: %p\n", last_pmd_table);
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
last_pmd_table += PTRS_PER_PMD;
|
|
|
|
|
if (((unsigned long)last_pmd_table & ~PAGE_MASK) == 0) {
|
|
|
|
|
last_pmd_table = (pmd_t *)memblock_alloc_low(PAGE_SIZE,
|
2018-10-31 06:08:54 +08:00
|
|
|
PAGE_SIZE);
|
2020-01-31 20:45:37 +08:00
|
|
|
if (!last_pmd_table)
|
2019-03-12 14:30:31 +08:00
|
|
|
panic("%s: Failed to allocate %lu bytes align=%lx\n",
|
|
|
|
|
__func__, PAGE_SIZE, PAGE_SIZE);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
clear_page(last_pmd_table);
|
|
|
|
|
mmu_page_ctor(last_pmd_table);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2020-01-31 20:45:37 +08:00
|
|
|
return last_pmd_table;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2007-05-31 15:40:54 +08:00
|
|
|
static void __init map_node(int node)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-05-31 15:40:54 +08:00
|
|
|
unsigned long physaddr, virtaddr, size;
|
2005-04-17 06:20:36 +08:00
|
|
|
pgd_t *pgd_dir;
|
2019-12-05 08:53:59 +08:00
|
|
|
p4d_t *p4d_dir;
|
|
|
|
|
pud_t *pud_dir;
|
2005-04-17 06:20:36 +08:00
|
|
|
pmd_t *pmd_dir;
|
|
|
|
|
pte_t *pte_dir;
|
|
|
|
|
|
2007-05-31 15:40:54 +08:00
|
|
|
size = m68k_memory[node].size;
|
|
|
|
|
physaddr = m68k_memory[node].addr;
|
|
|
|
|
virtaddr = (unsigned long)phys_to_virt(physaddr);
|
|
|
|
|
physaddr |= m68k_supervisor_cachemode |
|
|
|
|
|
_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (CPU_IS_040_OR_060)
|
|
|
|
|
physaddr |= _PAGE_GLOBAL040;
|
|
|
|
|
|
|
|
|
|
while (size > 0) {
|
|
|
|
|
#ifdef DEBUG
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
if (!(virtaddr & (PMD_SIZE-1)))
|
2005-04-17 06:20:36 +08:00
|
|
|
printk ("\npa=%#lx va=%#lx ", physaddr & PAGE_MASK,
|
|
|
|
|
virtaddr);
|
|
|
|
|
#endif
|
|
|
|
|
pgd_dir = pgd_offset_k(virtaddr);
|
|
|
|
|
if (virtaddr && CPU_IS_020_OR_030) {
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
if (!(virtaddr & (PGDIR_SIZE-1)) &&
|
|
|
|
|
size >= PGDIR_SIZE) {
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("[very early term]");
|
|
|
|
|
#endif
|
|
|
|
|
pgd_val(*pgd_dir) = physaddr;
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
size -= PGDIR_SIZE;
|
|
|
|
|
virtaddr += PGDIR_SIZE;
|
|
|
|
|
physaddr += PGDIR_SIZE;
|
2005-04-17 06:20:36 +08:00
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
}
|
2019-12-05 08:53:59 +08:00
|
|
|
p4d_dir = p4d_offset(pgd_dir, virtaddr);
|
|
|
|
|
pud_dir = pud_offset(p4d_dir, virtaddr);
|
|
|
|
|
if (!pud_present(*pud_dir)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
pmd_dir = kernel_ptr_table();
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("[new pointer %p]", pmd_dir);
|
|
|
|
|
#endif
|
2019-12-05 08:53:59 +08:00
|
|
|
pud_set(pud_dir, pmd_dir);
|
2005-04-17 06:20:36 +08:00
|
|
|
} else
|
2019-12-05 08:53:59 +08:00
|
|
|
pmd_dir = pmd_offset(pud_dir, virtaddr);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
if (CPU_IS_020_OR_030) {
|
|
|
|
|
if (virtaddr) {
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("[early term]");
|
|
|
|
|
#endif
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
pmd_val(*pmd_dir) = physaddr;
|
|
|
|
|
physaddr += PMD_SIZE;
|
2005-04-17 06:20:36 +08:00
|
|
|
} else {
|
|
|
|
|
int i;
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("[zero map]");
|
|
|
|
|
#endif
|
2020-01-31 20:45:37 +08:00
|
|
|
pte_dir = kernel_page_table();
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
pmd_set(pmd_dir, pte_dir);
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
pte_val(*pte_dir++) = 0;
|
|
|
|
|
physaddr += PAGE_SIZE;
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
for (i = 1; i < PTRS_PER_PTE; physaddr += PAGE_SIZE, i++)
|
2005-04-17 06:20:36 +08:00
|
|
|
pte_val(*pte_dir++) = physaddr;
|
|
|
|
|
}
|
m68k: mm: Restructure Motorola MMU page-table layout
The Motorola 68xxx MMUs, 040 (and later) have a fixed 7,7,{5,6}
page-table setup, where the last depends on the page-size selected (8k
vs 4k resp.), and head.S selects 4K pages. For 030 (and earlier) we
explicitly program 7,7,6 and 4K pages in %tc.
However, the current code implements this mightily weird. What it does
is group 16 of those (6 bit) pte tables into one 4k page to not waste
space. The down-side is that that forces pmd_t to be a 16-tuple
pointing to consecutive pte tables.
This breaks the generic code which assumes READ_ONCE(*pmd) will be
word sized.
Therefore implement a straight forward 7,7,6 3 level page-table setup,
with the addition (for 020/030) of (partial) large-page support. For
now this increases the memory footprint for pte-tables 15 fold.
Tested with ARAnyM/68040 emulation.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.711478295@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2020-01-31 20:45:36 +08:00
|
|
|
size -= PMD_SIZE;
|
|
|
|
|
virtaddr += PMD_SIZE;
|
2005-04-17 06:20:36 +08:00
|
|
|
} else {
|
|
|
|
|
if (!pmd_present(*pmd_dir)) {
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("[new table]");
|
|
|
|
|
#endif
|
|
|
|
|
pte_dir = kernel_page_table();
|
|
|
|
|
pmd_set(pmd_dir, pte_dir);
|
|
|
|
|
}
|
|
|
|
|
pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
|
|
|
|
|
|
|
|
|
|
if (virtaddr) {
|
|
|
|
|
if (!pte_present(*pte_dir))
|
|
|
|
|
pte_val(*pte_dir) = physaddr;
|
|
|
|
|
} else
|
|
|
|
|
pte_val(*pte_dir) = 0;
|
|
|
|
|
size -= PAGE_SIZE;
|
|
|
|
|
virtaddr += PAGE_SIZE;
|
|
|
|
|
physaddr += PAGE_SIZE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk("\n");
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* paging_init() continues the virtual memory environment setup which
|
|
|
|
|
* was begun by the code in arch/head.S.
|
|
|
|
|
*/
|
|
|
|
|
void __init paging_init(void)
|
|
|
|
|
{
|
2006-06-23 17:04:58 +08:00
|
|
|
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
|
2007-05-31 15:40:54 +08:00
|
|
|
unsigned long min_addr, max_addr;
|
2018-07-04 14:28:16 +08:00
|
|
|
unsigned long addr;
|
2007-05-31 15:40:54 +08:00
|
|
|
int i;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
2007-08-23 05:01:30 +08:00
|
|
|
printk ("start of paging_init (%p, %lx)\n", kernel_pg_dir, availmem);
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Fix the cache mode in the page descriptors for the 680[46]0. */
|
|
|
|
|
if (CPU_IS_040_OR_060) {
|
|
|
|
|
int i;
|
|
|
|
|
#ifndef mm_cachebits
|
|
|
|
|
mm_cachebits = _PAGE_CACHE040;
|
|
|
|
|
#endif
|
|
|
|
|
for (i = 0; i < 16; i++)
|
|
|
|
|
pgprot_val(protection_map[i]) |= _PAGE_CACHE040;
|
|
|
|
|
}
|
|
|
|
|
|
2007-05-31 15:40:54 +08:00
|
|
|
min_addr = m68k_memory[0].addr;
|
|
|
|
|
max_addr = min_addr + m68k_memory[0].size;
|
m68k: Fix memblock-related crashes
When running the kernel in Fast RAM on Atari:
Ignoring memory chunk at 0x0:0xe00000 before the first chunk
...
Unable to handle kernel NULL pointer dereference at virtual address (ptrval)
Oops: 00000000
Modules linked in:
PC: [<0069dbac>] free_all_bootmem+0x12c/0x186
SR: 2714 SP: (ptrval) a2: 005e3314
d0: 00000000 d1: 0000000a d2: 00000e00 d3: 00000000
d4: 005e1fc0 d5: 0000001a a0: 01000000 a1: 00000000
Process swapper (pid: 0, task=(ptrval))
Frame format=7 eff addr=00000736 ssw=0505 faddr=00000736
wb 1 stat/addr/data: 0000 00000000 00000000
wb 2 stat/addr/data: 0000 00000000 00000000
wb 3 stat/addr/data: 0000 00000736 00000000
push data: 00000000 00000000 00000000 00000000
Stack from 005e1f84:
00000000 0000000a 027d3260 006b5006 00000000 00000000 00000000 00000000
0004f062 0003a220 0069e272 005e1ff8 0000054c 00000000 00e00000 00000000
00000001 00693cd8 027d3260 0004f062 0003a220 00691be6 00000000 00000000
00000000 00000000 00000000 00000000 006b5006 00000000 00690872
Call Trace: [<0004f062>] printk+0x0/0x18
[<0003a220>] parse_args+0x0/0x2d4
[<0069e272>] memblock_virt_alloc_try_nid+0x0/0xa4
[<00693cd8>] mem_init+0xa/0x5c
[<0004f062>] printk+0x0/0x18
[<0003a220>] parse_args+0x0/0x2d4
[<00691be6>] start_kernel+0x1ca/0x462
[<00690872>] _sinittext+0x872/0x11f8
Code: 7a1a eaae 2270 6db0 0061 ef14 2f01 2f03 <96a9> 0736 2203 e589 d681 e78b d6a9 0732 2f03 2f40 0034 4eb9 0069 b8d0 260e 4fef
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: Attempted to kill the idle task!
As the kernel must run in the memory chunk with the lowest address,
ST-RAM is ignored, and removed from the m68k_memory[] array.
However, it is not removed from memblock, causing a crash later.
More investigation shows that there are 3 places where memory chunks are
ignored, all after the calls to memblock_add() in m68k_parse_bootinfo(),
and thus causing crashes:
1. On classic m68k CPUs with a MMU, paging_init() ignores all memory
chunks below the first chunk, cfr. above,
2. On Amigas equipped with a Zorro III bus, config_amiga() ignores all
Zorro II memory,
3. If CONFIG_SINGLE_MEMORY_CHUNK=y, m68k_parse_bootinfo() ignores all
but the first memory chunk.
Fix this by moving the calls to memblock_add() from
m68k_parse_bootinfo() to paging_init(), after all ignored memory chunks
have been removed from m68k_memory[].
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Fixes: 1008a11590b966b4 ("m68k: switch to MEMBLOCK + NO_BOOTMEM")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-12-03 19:53:51 +08:00
|
|
|
memblock_add(m68k_memory[0].addr, m68k_memory[0].size);
|
2007-05-31 15:40:54 +08:00
|
|
|
for (i = 1; i < m68k_num_memory;) {
|
|
|
|
|
if (m68k_memory[i].addr < min_addr) {
|
|
|
|
|
printk("Ignoring memory chunk at 0x%lx:0x%lx before the first chunk\n",
|
|
|
|
|
m68k_memory[i].addr, m68k_memory[i].size);
|
|
|
|
|
printk("Fix your bootloader or use a memfile to make use of this area!\n");
|
|
|
|
|
m68k_num_memory--;
|
|
|
|
|
memmove(m68k_memory + i, m68k_memory + i + 1,
|
2013-10-03 03:50:56 +08:00
|
|
|
(m68k_num_memory - i) * sizeof(struct m68k_mem_info));
|
2007-05-31 15:40:54 +08:00
|
|
|
continue;
|
|
|
|
|
}
|
m68k: Fix memblock-related crashes
When running the kernel in Fast RAM on Atari:
Ignoring memory chunk at 0x0:0xe00000 before the first chunk
...
Unable to handle kernel NULL pointer dereference at virtual address (ptrval)
Oops: 00000000
Modules linked in:
PC: [<0069dbac>] free_all_bootmem+0x12c/0x186
SR: 2714 SP: (ptrval) a2: 005e3314
d0: 00000000 d1: 0000000a d2: 00000e00 d3: 00000000
d4: 005e1fc0 d5: 0000001a a0: 01000000 a1: 00000000
Process swapper (pid: 0, task=(ptrval))
Frame format=7 eff addr=00000736 ssw=0505 faddr=00000736
wb 1 stat/addr/data: 0000 00000000 00000000
wb 2 stat/addr/data: 0000 00000000 00000000
wb 3 stat/addr/data: 0000 00000736 00000000
push data: 00000000 00000000 00000000 00000000
Stack from 005e1f84:
00000000 0000000a 027d3260 006b5006 00000000 00000000 00000000 00000000
0004f062 0003a220 0069e272 005e1ff8 0000054c 00000000 00e00000 00000000
00000001 00693cd8 027d3260 0004f062 0003a220 00691be6 00000000 00000000
00000000 00000000 00000000 00000000 006b5006 00000000 00690872
Call Trace: [<0004f062>] printk+0x0/0x18
[<0003a220>] parse_args+0x0/0x2d4
[<0069e272>] memblock_virt_alloc_try_nid+0x0/0xa4
[<00693cd8>] mem_init+0xa/0x5c
[<0004f062>] printk+0x0/0x18
[<0003a220>] parse_args+0x0/0x2d4
[<00691be6>] start_kernel+0x1ca/0x462
[<00690872>] _sinittext+0x872/0x11f8
Code: 7a1a eaae 2270 6db0 0061 ef14 2f01 2f03 <96a9> 0736 2203 e589 d681 e78b d6a9 0732 2f03 2f40 0034 4eb9 0069 b8d0 260e 4fef
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: Attempted to kill the idle task!
As the kernel must run in the memory chunk with the lowest address,
ST-RAM is ignored, and removed from the m68k_memory[] array.
However, it is not removed from memblock, causing a crash later.
More investigation shows that there are 3 places where memory chunks are
ignored, all after the calls to memblock_add() in m68k_parse_bootinfo(),
and thus causing crashes:
1. On classic m68k CPUs with a MMU, paging_init() ignores all memory
chunks below the first chunk, cfr. above,
2. On Amigas equipped with a Zorro III bus, config_amiga() ignores all
Zorro II memory,
3. If CONFIG_SINGLE_MEMORY_CHUNK=y, m68k_parse_bootinfo() ignores all
but the first memory chunk.
Fix this by moving the calls to memblock_add() from
m68k_parse_bootinfo() to paging_init(), after all ignored memory chunks
have been removed from m68k_memory[].
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Fixes: 1008a11590b966b4 ("m68k: switch to MEMBLOCK + NO_BOOTMEM")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-12-03 19:53:51 +08:00
|
|
|
memblock_add(m68k_memory[i].addr, m68k_memory[i].size);
|
2007-05-31 15:40:54 +08:00
|
|
|
addr = m68k_memory[i].addr + m68k_memory[i].size;
|
|
|
|
|
if (addr > max_addr)
|
|
|
|
|
max_addr = addr;
|
|
|
|
|
i++;
|
|
|
|
|
}
|
|
|
|
|
m68k_memoffset = min_addr - PAGE_OFFSET;
|
|
|
|
|
m68k_virt_to_node_shift = fls(max_addr - min_addr - 1) - 6;
|
|
|
|
|
|
2007-05-31 15:40:50 +08:00
|
|
|
module_fixup(NULL, __start_fixup, __stop_fixup);
|
|
|
|
|
flush_icache();
|
|
|
|
|
|
2007-05-31 15:40:54 +08:00
|
|
|
high_memory = phys_to_virt(max_addr);
|
|
|
|
|
|
|
|
|
|
min_low_pfn = availmem >> PAGE_SHIFT;
|
2015-11-15 18:34:20 +08:00
|
|
|
max_pfn = max_low_pfn = max_addr >> PAGE_SHIFT;
|
2007-05-31 15:40:54 +08:00
|
|
|
|
2018-07-04 14:28:16 +08:00
|
|
|
/* Reserve kernel text/data/bss and the memory allocated in head.S */
|
|
|
|
|
memblock_reserve(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
|
2007-05-31 15:40:54 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
|
* Map the physical memory available into the kernel virtual
|
2018-07-04 14:28:16 +08:00
|
|
|
* address space. Make sure memblock will not try to allocate
|
|
|
|
|
* pages beyond the memory we already mapped in head.S
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2018-07-04 14:28:16 +08:00
|
|
|
memblock_set_bottom_up(true);
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < m68k_num_memory; i++) {
|
|
|
|
|
m68k_setup_node(i);
|
2007-05-31 15:40:54 +08:00
|
|
|
map_node(i);
|
2018-07-04 14:28:16 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
flush_tlb_all();
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* initialize the bad page table and bad page to point
|
|
|
|
|
* to a couple of allocated pages
|
|
|
|
|
*/
|
2018-10-31 06:08:58 +08:00
|
|
|
empty_zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
|
2019-03-12 14:30:31 +08:00
|
|
|
if (!empty_zero_page)
|
|
|
|
|
panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
|
|
|
|
|
__func__, PAGE_SIZE, PAGE_SIZE);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Set up SFC/DFC registers
|
|
|
|
|
*/
|
|
|
|
|
set_fs(KERNEL_DS);
|
|
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
printk ("before free_area_init\n");
|
|
|
|
|
#endif
|
2007-05-31 15:40:54 +08:00
|
|
|
for (i = 0; i < m68k_num_memory; i++) {
|
|
|
|
|
zones_size[ZONE_DMA] = m68k_memory[i].size >> PAGE_SHIFT;
|
2008-07-24 12:27:20 +08:00
|
|
|
free_area_init_node(i, zones_size,
|
2007-05-31 15:40:54 +08:00
|
|
|
m68k_memory[i].addr >> PAGE_SHIFT, NULL);
|
2011-04-26 10:51:53 +08:00
|
|
|
if (node_present_pages(i))
|
|
|
|
|
node_set_state(i, N_NORMAL_MEMORY);
|
2007-05-31 15:40:54 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|