hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

sh: Document PTEL 31:29 use on PTEA-wielding parts. 

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Stuart Menefy 2007-11-30 18:05:18 +09:00 committed by Paul Mundt
parent 2adb4e1009
commit fc55888f83
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/asm-sh/pgtable_32.h
View File

@ -22,8 +22,9 @@
* - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages. * - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages.
* Bit 10 is used for _PAGE_ACCESSED, bit 11 remains unused. * Bit 10 is used for _PAGE_ACCESSED, bit 11 remains unused.
* *
* - Bits 31, 30, and 29 remain unused by everyone and can be used for future * - On 29 bit platforms, bits 31 to 29 are used for the space attributes
* software flags, although care must be taken to update _PAGE_CLEAR_FLAGS. * and timing control which (together with bit 0) are moved into the
* old-style PTEA on the parts that support it.
* *
* XXX: Leave the _PAGE_FILE and _PAGE_WT overhaul for a rainy day. * XXX: Leave the _PAGE_FILE and _PAGE_WT overhaul for a rainy day.
* *