82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
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* Stolen from the linux-2.6/include/asm-generic/io.h
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*/
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/**
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* @file
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* @brief mips IO access functions
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*/
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#ifndef __ASM_MIPS_IO_H
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#define __ASM_MIPS_IO_H
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#include <linux/compiler.h>
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#define IO_SPACE_LIMIT 0
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/*****************************************************************************/
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently. On the simple architectures, we just read/write the
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* memory location directly.
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*/
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#ifndef __raw_readb
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static inline u8 __raw_readb(const volatile void __iomem *addr)
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{
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return *(const volatile u8 __force *) addr;
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}
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#endif
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#ifndef __raw_readw
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static inline u16 __raw_readw(const volatile void __iomem *addr)
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{
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return *(const volatile u16 __force *) addr;
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}
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#endif
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#ifndef __raw_readl
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static inline u32 __raw_readl(const volatile void __iomem *addr)
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{
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return *(const volatile u32 __force *) addr;
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}
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#endif
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#define readb __raw_readb
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#define readw(addr) __le16_to_cpu(__raw_readw(addr))
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#define readl(addr) __le32_to_cpu(__raw_readl(addr))
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#ifndef __raw_writeb
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static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
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{
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*(volatile u8 __force *) addr = b;
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}
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#endif
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#ifndef __raw_writew
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static inline void __raw_writew(u16 b, volatile void __iomem *addr)
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{
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*(volatile u16 __force *) addr = b;
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}
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#endif
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#ifndef __raw_writel
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static inline void __raw_writel(u32 b, volatile void __iomem *addr)
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{
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*(volatile u32 __force *) addr = b;
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}
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#endif
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#define writeb __raw_writeb
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#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
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#define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr)
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#define in_be16(a) __be16_to_cpu(__raw_readw(a))
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#define in_be32(a) __be32_to_cpu(__raw_readl(a))
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#define out_be16(a, v) __raw_writew(__cpu_to_be16(v), a)
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#define out_be32(a, v) __raw_writel(__cpu_to_be32(v), a)
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#endif /* __ASM_MIPS_IO_H */
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