From be135f40899cb3334faa7d2e27025055da311ec4 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Sun, 8 May 2011 21:41:59 +0000 Subject: powerpc: Add ioremap_wc Add ioremap_wc so drivers can request write combining on kernel mappings. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/io.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/powerpc/include/asm') diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 2f365f5007a..662d2edae76 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)) -- cgit v1.2.3