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| author |   Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2009-07-10 09:57:34 -0700 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@zytor.com> | 2009-08-26 15:41:10 -0700 |
| commit | 9fd126bc742f74a95d2ba610247712ff05da02fe (patch) | |
| tree | 2be99f0b80d6f5d07d2cff6bfddbb1b9313f026c /arch/x86/include/asm/pat.h | |
| parent | x86, pat: ioremap to follow same PAT restrictions as other PAT users (diff) | |
| download | wireguard-linux-9fd126bc742f74a95d2ba610247712ff05da02fe.tar.xz wireguard-linux-9fd126bc742f74a95d2ba610247712ff05da02fe.zip | |
x86, pat: New i/f for driver to request memtype for IO regions
Add new routines to request memtype for IO regions. This will currently
be a backend for io_mapping_* routines. But, it can also be made available
to drivers directly in future, in case it is needed.
reserve interface reserves the memory, makes sure we have a compatible
memory type available and keeps the identity map in sync when needed.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/pat.h')
| -rw-r--r-- | arch/x86/include/asm/pat.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index 7af14e512f97..e2c1668dde7a 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -19,4 +19,9 @@ extern int free_memtype(u64 start, u64 end); extern int kernel_map_sync_memtype(u64 base, unsigned long size, unsigned long flag); +int io_reserve_memtype(resource_size_t start, resource_size_t end, + unsigned long *type); + +void io_free_memtype(resource_size_t start, resource_size_t end); + #endif /* _ASM_X86_PAT_H */ |