diff options
| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2008-03-18 17:00:14 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:19 +0200 |
| commit | 2e5d9c857d4e6c9e7b7d8c8c86a68a7842d213d6 (patch) | |
| tree | 6c90c0f9f38ff85e2f42ddc0f4ef0291cdd47d38 /arch/x86/mm/Makefile | |
| parent | d27554d874c7eeb14c8bfecdc39c3a8618cd8d32 (diff) | |
x86: PAT infrastructure patch
Sets up pat_init() infrastructure.
PAT MSR has following setting.
PAT
|PCD
||PWT
|||
000 WB _PAGE_CACHE_WB
001 WC _PAGE_CACHE_WC
010 UC- _PAGE_CACHE_UC_MINUS
011 UC _PAGE_CACHE_UC
We are effectively changing WT from boot time setting to WC.
UC_MINUS is used to provide backward compatibility to existing /dev/mem
users(X).
reserve_memtype and free_memtype are new interfaces for maintaining alias-free
mapping. It is currently implemented in a simple way with a linked list and
not optimized. reserve and free tracks the effective memory type, as a result
of PAT and MTRR setting rather than what is actually requested in PAT.
pat_init piggy backs on mtrr_init as the rules for setting both pat and mtrr
are same.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/Makefile')
| -rw-r--r-- | arch/x86/mm/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile index 9ab9889863f..20941d2954e 100644 --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -1,4 +1,5 @@ -obj-y := init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o +obj-y := init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \ + pat.o obj-$(CONFIG_X86_32) += pgtable_32.o |