From mboxrd@z Thu Jan 1 00:00:00 1970 From: Magnus Damm Date: Tue, 28 Apr 2009 07:59:34 +0000 Subject: [PATCH] sh: pass through ioremap() for non-mmu processors Message-Id: <20090428075934.16285.38017.sendpatchset@rx1.opensource.se> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org From: Magnus Damm This patch modifies the ioremap() handling for CONFIG_MMU=n. All 32-bit SuperH processors currently go through __ioremap_mode() and check for IO_TRAPPED and directly mapped segments. With this patch we simplify the MMU less case with a pass through version of __ioremap_mode() which just returns the physical address. The effects of this is change are: - fix non-MMU ioremap() of high address hardware blocks (sh7203 CMT) - IO_TRAPPED is never checked for Signed-off-by: Magnus Damm --- arch/sh/Kconfig | 1 + arch/sh/include/asm/io.h | 13 +++++++------ 2 files changed, 8 insertions(+), 6 deletions(-) --- 0001/arch/sh/Kconfig +++ work/arch/sh/Kconfig 2009-04-21 15:54:59.000000000 +0900 @@ -136,6 +136,7 @@ config ARCH_HAS_DEFAULT_IDLE config IO_TRAPPED bool + depends on MMU source "init/Kconfig" --- 0001/arch/sh/include/asm/io.h +++ work/arch/sh/include/asm/io.h 2009-04-21 15:18:02.000000000 +0900 @@ -228,12 +228,6 @@ void __iounmap(void __iomem *addr); unsigned long onchip_remap(unsigned long addr, unsigned long size, const char *name); extern void onchip_unmap(unsigned long vaddr); -#else -#define __ioremap(offset, size, flags) ((void __iomem *)(offset)) -#define __iounmap(addr) do { } while (0) -#define onchip_remap(addr, size, name) (addr) -#define onchip_unmap(addr) do { } while (0) -#endif /* CONFIG_MMU */ static inline void __iomem * __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags) @@ -269,6 +263,13 @@ __ioremap_mode(unsigned long offset, uns return __ioremap(offset, size, flags); } +#else +#define onchip_remap(addr, size, name) (addr) +#define onchip_unmap(addr) do { } while (0) +#define __ioremap_mode(offset, size, flags) (void __iomem *)(offset) +#define __iounmap(addr) do { } while (0) +#endif /* CONFIG_MMU */ + #define ioremap(offset, size) \ __ioremap_mode((offset), (size), 0) #define ioremap_nocache(offset, size) \