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| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2008-03-18 17:00:15 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:40:47 +0200 |
| commit | e045fb2a988a9a1964059b0d33dbaf18d12f925f (patch) | |
| tree | 61dbd03abd83dcf6d5195fa6463ea96e125784f6 /include/asm-x86/io.h | |
| parent | e2beb3eae627211b67e456c53f946cede2ac10d7 (diff) | |
| download | linux-e045fb2a988a9a1964059b0d33dbaf18d12f925f.tar.gz linux-e045fb2a988a9a1964059b0d33dbaf18d12f925f.tar.bz2 linux-e045fb2a988a9a1964059b0d33dbaf18d12f925f.zip | |
x86: PAT avoid aliasing in /dev/mem read/write
Add xlate and unxlate around /dev/mem read/write. This sets up the mapping
that can be used for /dev/mem read and write without aliasing worries.
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 'include/asm-x86/io.h')
| -rw-r--r-- | include/asm-x86/io.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h index 7b292d386713..d5b11f60dbd0 100644 --- a/include/asm-x86/io.h +++ b/include/asm-x86/io.h @@ -1,3 +1,6 @@ +#ifndef _ASM_X86_IO_H +#define _ASM_X86_IO_H + #define ARCH_HAS_IOREMAP_WC #ifdef CONFIG_X86_32 @@ -5,7 +8,12 @@ #else # include "io_64.h" #endif + +extern void *xlate_dev_mem_ptr(unsigned long phys); +extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr); + extern int ioremap_change_attr(unsigned long vaddr, unsigned long size, unsigned long prot_val); extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size); +#endif /* _ASM_X86_IO_H */ |