diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/alpha/include/asm/io.h | 74 | ||||
| -rw-r--r-- | arch/alpha/kernel/io.c | 60 |
2 files changed, 112 insertions, 22 deletions
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h index 13bea465f1c0..a4d0c19f1e79 100644 --- a/arch/alpha/include/asm/io.h +++ b/arch/alpha/include/asm/io.h @@ -309,14 +309,18 @@ static inline int __is_mmio(const volatile void __iomem *addr) #if IO_CONCAT(__IO_PREFIX,trivial_io_bw) extern inline unsigned int ioread8(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr); mb(); return ret; } extern inline unsigned int ioread16(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr); mb(); return ret; } @@ -357,7 +361,9 @@ extern inline void outw(u16 b, unsigned long port) #if IO_CONCAT(__IO_PREFIX,trivial_io_lq) extern inline unsigned int ioread32(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr); mb(); return ret; } @@ -402,14 +408,18 @@ extern inline void __raw_writew(u16 b, volatile void __iomem *addr) extern inline u8 readb(const volatile void __iomem *addr) { - u8 ret = __raw_readb(addr); + u8 ret; + mb(); + ret = __raw_readb(addr); mb(); return ret; } extern inline u16 readw(const volatile void __iomem *addr) { - u16 ret = __raw_readw(addr); + u16 ret; + mb(); + ret = __raw_readw(addr); mb(); return ret; } @@ -450,14 +460,18 @@ extern inline void __raw_writeq(u64 b, volatile void __iomem *addr) extern inline u32 readl(const volatile void __iomem *addr) { - u32 ret = __raw_readl(addr); + u32 ret; + mb(); + ret = __raw_readl(addr); mb(); return ret; } extern inline u64 readq(const volatile void __iomem *addr) { - u64 ret = __raw_readq(addr); + u64 ret; + mb(); + ret = __raw_readq(addr); mb(); return ret; } @@ -486,14 +500,44 @@ extern inline void writeq(u64 b, volatile void __iomem *addr) #define outb_p outb #define outw_p outw #define outl_p outl -#define readb_relaxed(addr) __raw_readb(addr) -#define readw_relaxed(addr) __raw_readw(addr) -#define readl_relaxed(addr) __raw_readl(addr) -#define readq_relaxed(addr) __raw_readq(addr) -#define writeb_relaxed(b, addr) __raw_writeb(b, addr) -#define writew_relaxed(b, addr) __raw_writew(b, addr) -#define writel_relaxed(b, addr) __raw_writel(b, addr) -#define writeq_relaxed(b, addr) __raw_writeq(b, addr) + +extern u8 readb_relaxed(const volatile void __iomem *addr); +extern u16 readw_relaxed(const volatile void __iomem *addr); +extern u32 readl_relaxed(const volatile void __iomem *addr); +extern u64 readq_relaxed(const volatile void __iomem *addr); + +#if IO_CONCAT(__IO_PREFIX,trivial_io_bw) +extern inline u8 readb_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readb(addr); +} + +extern inline u16 readw_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readw(addr); +} +#endif + +#if IO_CONCAT(__IO_PREFIX,trivial_io_lq) +extern inline u32 readl_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readl(addr); +} + +extern inline u64 readq_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readq(addr); +} +#endif + +#define writeb_relaxed writeb +#define writew_relaxed writew +#define writel_relaxed writel +#define writeq_relaxed writeq /* * String version of IO memory access ops: diff --git a/arch/alpha/kernel/io.c b/arch/alpha/kernel/io.c index c025a3e5e357..938de13adfbf 100644 --- a/arch/alpha/kernel/io.c +++ b/arch/alpha/kernel/io.c @@ -16,21 +16,27 @@ unsigned int ioread8(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr); mb(); return ret; } unsigned int ioread16(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr); mb(); return ret; } unsigned int ioread32(void __iomem *addr) { - unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr); + unsigned int ret; + mb(); + ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr); mb(); return ret; } @@ -148,28 +154,36 @@ EXPORT_SYMBOL(__raw_writeq); u8 readb(const volatile void __iomem *addr) { - u8 ret = __raw_readb(addr); + u8 ret; + mb(); + ret = __raw_readb(addr); mb(); return ret; } u16 readw(const volatile void __iomem *addr) { - u16 ret = __raw_readw(addr); + u16 ret; + mb(); + ret = __raw_readw(addr); mb(); return ret; } u32 readl(const volatile void __iomem *addr) { - u32 ret = __raw_readl(addr); + u32 ret; + mb(); + ret = __raw_readl(addr); mb(); return ret; } u64 readq(const volatile void __iomem *addr) { - u64 ret = __raw_readq(addr); + u64 ret; + mb(); + ret = __raw_readq(addr); mb(); return ret; } @@ -207,6 +221,38 @@ EXPORT_SYMBOL(writew); EXPORT_SYMBOL(writel); EXPORT_SYMBOL(writeq); +/* + * The _relaxed functions must be ordered w.r.t. each other, but they don't + * have to be ordered w.r.t. other memory accesses. + */ +u8 readb_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readb(addr); +} + +u16 readw_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readw(addr); +} + +u32 readl_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readl(addr); +} + +u64 readq_relaxed(const volatile void __iomem *addr) +{ + mb(); + return __raw_readq(addr); +} + +EXPORT_SYMBOL(readb_relaxed); +EXPORT_SYMBOL(readw_relaxed); +EXPORT_SYMBOL(readl_relaxed); +EXPORT_SYMBOL(readq_relaxed); /* * Read COUNT 8-bit bytes from port PORT into memory starting at SRC. |