avr32: Store virtual addresses in the PGD

Browse source

Instead of storing physical addresses along with page flags in the
PGD, store virtual addresses and use NULL to indicate a not present
second-level page table. A non-page-aligned page table indicates a bad
PMD.

This simplifies the TLB miss handler since it no longer has to check
the Present bit and no longer has to convert the PGD entry from
physical to virtual address. Instead, it has to check for a NULL
entry, which is slightly cheaper than either.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

...

This commit is contained in:

Haavard Skinnemoen 2008-01-14 22:15:05 +01:00

parent ebe74597a5

commit cfd23e93a0

5 changed files with 51 additions and 54 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

18

include/asm-avr32/pgalloc.h

View file

34

include/asm-avr32/pgtable.h

View file