diff options
| author |   Anton Blanchard <anton@samba.org> | 2011-05-08 21:41:59 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-19 14:30:42 +1000 |
| commit | be135f40899cb3334faa7d2e27025055da311ec4 (patch) | |
| tree | 8dd20fc82c239562a16fdf9d8f32065e9927b231 /arch/powerpc/include/asm/io.h | |
| parent | powerpc: Improve scheduling of system call entry instructions (diff) | |
| download | linux-dev-be135f40899cb3334faa7d2e27025055da311ec4.tar.xz linux-dev-be135f40899cb3334faa7d2e27025055da311ec4.zip | |
powerpc: Add ioremap_wc
Add ioremap_wc so drivers can request write combining on kernel
mappings.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/io.h')
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 2f365f5007a0..662d2edae768 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -2,6 +2,8 @@ #define _ASM_POWERPC_IO_H #ifdef __KERNEL__ +#define ARCH_HAS_IOREMAP_WC + /* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -628,6 +630,8 @@ static inline void iosync(void) * * * ioremap_nocache is identical to ioremap * + * * ioremap_wc enables write combining + * * * iounmap undoes such a mapping and can be hooked * * * __ioremap_at (and the pending __iounmap_at) are low level functions to @@ -648,6 +652,7 @@ static inline void iosync(void) extern void __iomem *ioremap(phys_addr_t address, unsigned long size); extern void __iomem *ioremap_flags(phys_addr_t address, unsigned long size, unsigned long flags); +extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size); #define ioremap_nocache(addr, size) ioremap((addr), (size)) #define ioremap_prot(addr, size, prot) ioremap_flags((addr), (size), (prot)) |