diff options
Diffstat (limited to 'arch/arm/include/asm/io.h')
| -rw-r--r-- | arch/arm/include/asm/io.h | 50 |
1 files changed, 32 insertions, 18 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index c980156f3263..1261b1f928d9 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -26,6 +26,7 @@ #include <linux/types.h> #include <asm/byteorder.h> #include <asm/memory.h> +#include <asm/system.h> /* * ISA I/O bus memory addresses are 1:1 with the physical address. @@ -179,25 +180,38 @@ extern void _memset_io(volatile void __iomem *, int, size_t); * IO port primitives for more information. */ #ifdef __mem_pci -#define readb(c) ({ __u8 __v = __raw_readb(__mem_pci(c)); __v; }) -#define readw(c) ({ __u16 __v = le16_to_cpu((__force __le16) \ +#define readb_relaxed(c) ({ u8 __v = __raw_readb(__mem_pci(c)); __v; }) +#define readw_relaxed(c) ({ u16 __v = le16_to_cpu((__force __le16) \ __raw_readw(__mem_pci(c))); __v; }) -#define readl(c) ({ __u32 __v = le32_to_cpu((__force __le32) \ +#define readl_relaxed(c) ({ u32 __v = le32_to_cpu((__force __le32) \ __raw_readl(__mem_pci(c))); __v; }) -#define readb_relaxed(addr) readb(addr) -#define readw_relaxed(addr) readw(addr) -#define readl_relaxed(addr) readl(addr) + +#define writeb_relaxed(v,c) ((void)__raw_writeb(v,__mem_pci(c))) +#define writew_relaxed(v,c) ((void)__raw_writew((__force u16) \ + cpu_to_le16(v),__mem_pci(c))) +#define writel_relaxed(v,c) ((void)__raw_writel((__force u32) \ + cpu_to_le32(v),__mem_pci(c))) + +#ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE +#define __iormb() rmb() +#define __iowmb() wmb() +#else +#define __iormb() do { } while (0) +#define __iowmb() do { } while (0) +#endif + +#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) +#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) +#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) + +#define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); }) +#define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); }) +#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); }) #define readsb(p,d,l) __raw_readsb(__mem_pci(p),d,l) #define readsw(p,d,l) __raw_readsw(__mem_pci(p),d,l) #define readsl(p,d,l) __raw_readsl(__mem_pci(p),d,l) -#define writeb(v,c) __raw_writeb(v,__mem_pci(c)) -#define writew(v,c) __raw_writew((__force __u16) \ - cpu_to_le16(v),__mem_pci(c)) -#define writel(v,c) __raw_writel((__force __u32) \ - cpu_to_le32(v),__mem_pci(c)) - #define writesb(p,d,l) __raw_writesb(__mem_pci(p),d,l) #define writesw(p,d,l) __raw_writesw(__mem_pci(p),d,l) #define writesl(p,d,l) __raw_writesl(__mem_pci(p),d,l) @@ -244,13 +258,13 @@ extern void _memset_io(volatile void __iomem *, int, size_t); * io{read,write}{8,16,32} macros */ #ifndef ioread8 -#define ioread8(p) ({ unsigned int __v = __raw_readb(p); __v; }) -#define ioread16(p) ({ unsigned int __v = le16_to_cpu((__force __le16)__raw_readw(p)); __v; }) -#define ioread32(p) ({ unsigned int __v = le32_to_cpu((__force __le32)__raw_readl(p)); __v; }) +#define ioread8(p) ({ unsigned int __v = __raw_readb(p); __iormb(); __v; }) +#define ioread16(p) ({ unsigned int __v = le16_to_cpu((__force __le16)__raw_readw(p)); __iormb(); __v; }) +#define ioread32(p) ({ unsigned int __v = le32_to_cpu((__force __le32)__raw_readl(p)); __iormb(); __v; }) -#define iowrite8(v,p) __raw_writeb(v, p) -#define iowrite16(v,p) __raw_writew((__force __u16)cpu_to_le16(v), p) -#define iowrite32(v,p) __raw_writel((__force __u32)cpu_to_le32(v), p) +#define iowrite8(v,p) ({ __iowmb(); (void)__raw_writeb(v, p); }) +#define iowrite16(v,p) ({ __iowmb(); (void)__raw_writew((__force __u16)cpu_to_le16(v), p); }) +#define iowrite32(v,p) ({ __iowmb(); (void)__raw_writel((__force __u32)cpu_to_le32(v), p); }) #define ioread8_rep(p,d,c) __raw_readsb(p,d,c) #define ioread16_rep(p,d,c) __raw_readsw(p,d,c) |