diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-09-10 08:35:40 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-09-10 08:35:40 +0200 |
commit | 429b022af41108f6942d72547592b1d30e9a51f0 (patch) | |
tree | 7d68355529718018cdad1241285816c6f64620b2 /arch/alpha/include/asm/io_trivial.h | |
parent | 0cd418ddb1ee88df7d16d5df06cb2da68eceb9e4 (diff) | |
parent | adee14b2e1557d0a8559f29681732d05a89dfc35 (diff) | |
download | linux-429b022af41108f6942d72547592b1d30e9a51f0.tar.gz linux-429b022af41108f6942d72547592b1d30e9a51f0.tar.bz2 linux-429b022af41108f6942d72547592b1d30e9a51f0.zip |
Merge commit 'v2.6.27-rc6' into core/rcu
Diffstat (limited to 'arch/alpha/include/asm/io_trivial.h')
-rw-r--r-- | arch/alpha/include/asm/io_trivial.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/io_trivial.h b/arch/alpha/include/asm/io_trivial.h new file mode 100644 index 000000000000..1c77f10b4b36 --- /dev/null +++ b/arch/alpha/include/asm/io_trivial.h @@ -0,0 +1,131 @@ +/* Trivial implementations of basic i/o routines. Assumes that all + of the hard work has been done by ioremap and ioportmap, and that + access to i/o space is linear. */ + +/* This file may be included multiple times. */ + +#if IO_CONCAT(__IO_PREFIX,trivial_io_bw) +__EXTERN_INLINE unsigned int +IO_CONCAT(__IO_PREFIX,ioread8)(void __iomem *a) +{ + return __kernel_ldbu(*(volatile u8 __force *)a); +} + +__EXTERN_INLINE unsigned int +IO_CONCAT(__IO_PREFIX,ioread16)(void __iomem *a) +{ + return __kernel_ldwu(*(volatile u16 __force *)a); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,iowrite8)(u8 b, void __iomem *a) +{ + __kernel_stb(b, *(volatile u8 __force *)a); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,iowrite16)(u16 b, void __iomem *a) +{ + __kernel_stw(b, *(volatile u16 __force *)a); +} +#endif + +#if IO_CONCAT(__IO_PREFIX,trivial_io_lq) +__EXTERN_INLINE unsigned int +IO_CONCAT(__IO_PREFIX,ioread32)(void __iomem *a) +{ + return *(volatile u32 __force *)a; +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,iowrite32)(u32 b, void __iomem *a) +{ + *(volatile u32 __force *)a = b; +} +#endif + +#if IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 1 +__EXTERN_INLINE u8 +IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a) +{ + return __kernel_ldbu(*(const volatile u8 __force *)a); +} + +__EXTERN_INLINE u16 +IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a) +{ + return __kernel_ldwu(*(const volatile u16 __force *)a); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a) +{ + __kernel_stb(b, *(volatile u8 __force *)a); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a) +{ + __kernel_stw(b, *(volatile u16 __force *)a); +} +#elif IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 2 +__EXTERN_INLINE u8 +IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a) +{ + void __iomem *addr = (void __iomem *)a; + return IO_CONCAT(__IO_PREFIX,ioread8)(addr); +} + +__EXTERN_INLINE u16 +IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a) +{ + void __iomem *addr = (void __iomem *)a; + return IO_CONCAT(__IO_PREFIX,ioread16)(addr); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a) +{ + void __iomem *addr = (void __iomem *)a; + IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr); +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a) +{ + void __iomem *addr = (void __iomem *)a; + IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr); +} +#endif + +#if IO_CONCAT(__IO_PREFIX,trivial_rw_lq) == 1 +__EXTERN_INLINE u32 +IO_CONCAT(__IO_PREFIX,readl)(const volatile void __iomem *a) +{ + return *(const volatile u32 __force *)a; +} + +__EXTERN_INLINE u64 +IO_CONCAT(__IO_PREFIX,readq)(const volatile void __iomem *a) +{ + return *(const volatile u64 __force *)a; +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writel)(u32 b, volatile void __iomem *a) +{ + *(volatile u32 __force *)a = b; +} + +__EXTERN_INLINE void +IO_CONCAT(__IO_PREFIX,writeq)(u64 b, volatile void __iomem *a) +{ + *(volatile u64 __force *)a = b; +} +#endif + +#if IO_CONCAT(__IO_PREFIX,trivial_iounmap) +__EXTERN_INLINE void IO_CONCAT(__IO_PREFIX,iounmap)(volatile void __iomem *a) +{ +} +#endif |