diff options
Diffstat (limited to 'arch/arc/include/asm/io.h')
| -rw-r--r-- | arch/arc/include/asm/io.h | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h index 947bf0cfdec0..17f85c9c73cf 100644 --- a/arch/arc/include/asm/io.h +++ b/arch/arc/include/asm/io.h @@ -13,8 +13,8 @@ #include <asm/byteorder.h> #include <asm/page.h> -extern void __iomem *ioremap(unsigned long physaddr, unsigned long size); -extern void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size, +extern void __iomem *ioremap(phys_addr_t paddr, unsigned long size); +extern void __iomem *ioremap_prot(phys_addr_t paddr, unsigned long size, unsigned long flags); static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) { @@ -138,15 +138,23 @@ static inline void __raw_writel(u32 w, volatile void __iomem *addr) #define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); }) /* - * Relaxed API for drivers which can handle any ordering themselves + * Relaxed API for drivers which can handle barrier ordering themselves + * + * Also these are defined to perform little endian accesses. + * To provide the typical device register semantics of fixed endian, + * swap the byte order for Big Endian + * + * http://lkml.kernel.org/r/201603100845.30602.arnd@arndb.de */ #define readb_relaxed(c) __raw_readb(c) -#define readw_relaxed(c) __raw_readw(c) -#define readl_relaxed(c) __raw_readl(c) +#define readw_relaxed(c) ({ u16 __r = le16_to_cpu((__force __le16) \ + __raw_readw(c)); __r; }) +#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32) \ + __raw_readl(c)); __r; }) #define writeb_relaxed(v,c) __raw_writeb(v,c) -#define writew_relaxed(v,c) __raw_writew(v,c) -#define writel_relaxed(v,c) __raw_writel(v,c) +#define writew_relaxed(v,c) __raw_writew((__force u16) cpu_to_le16(v),c) +#define writel_relaxed(v,c) __raw_writel((__force u32) cpu_to_le32(v),c) #include <asm-generic/io.h> |