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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2009-07-10 20:57:34 +0400
committerH. Peter Anvin <hpa@zytor.com>2009-08-27 02:41:10 +0400
commit9fd126bc742f74a95d2ba610247712ff05da02fe (patch)
tree2be99f0b80d6f5d07d2cff6bfddbb1b9313f026c /arch/x86/include/asm/pat.h
parent279e669b3fc0068cc3509e8e53036999e1e86588 (diff)
downloadlinux-9fd126bc742f74a95d2ba610247712ff05da02fe.tar.xz
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.h5
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 */