LXR linux/arch/blackfin/include/asm/io.h

   1/*
   2 * Copyright 2004-2010 Analog Devices Inc.
   3 *
   4 * Licensed under the GPL-2 or later.
   5 */
   6
   7#ifndef _BFIN_IO_H
   8#define _BFIN_IO_H
   9
  10#include <linux/compiler.h>
  11#include <linux/types.h>
  12#include <asm/byteorder.h>
  13
  14#define DECLARE_BFIN_RAW_READX(size, type, asm, asm_sign) \
  15static inline type __raw_read##size(const volatile void __iomem *addr) \
  16{ \
  17        unsigned int val; \
  18        int tmp; \
  19        __asm__ __volatile__ ( \
  20                "cli %1;" \
  21                "NOP; NOP; SSYNC;" \
  22                "%0 = "#asm" [%2] "#asm_sign";" \
  23                "sti %1;" \
  24                : "=d"(val), "=d"(tmp) \
  25                : "a"(addr) \
  26        ); \
  27        return (type) val; \
  28}
  29DECLARE_BFIN_RAW_READX(b, u8, b, (z))
  30#define __raw_readb __raw_readb
  31DECLARE_BFIN_RAW_READX(w, u16, w, (z))
  32#define __raw_readw __raw_readw
  33DECLARE_BFIN_RAW_READX(l, u32, , )
  34#define __raw_readl __raw_readl
  35
  36extern void outsb(unsigned long port, const void *addr, unsigned long count);
  37extern void outsw(unsigned long port, const void *addr, unsigned long count);
  38extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
  39extern void outsl(unsigned long port, const void *addr, unsigned long count);
  40#define outsb outsb
  41#define outsw outsw
  42#define outsl outsl
  43
  44extern void insb(unsigned long port, void *addr, unsigned long count);
  45extern void insw(unsigned long port, void *addr, unsigned long count);
  46extern void insw_8(unsigned long port, void *addr, unsigned long count);
  47extern void insl(unsigned long port, void *addr, unsigned long count);
  48extern void insl_16(unsigned long port, void *addr, unsigned long count);
  49#define insb insb
  50#define insw insw
  51#define insl insl
  52
  53extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
  54extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
  55extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
  56
  57extern void dma_insb(unsigned long port, void *addr, unsigned short count);
  58extern void dma_insw(unsigned long port, void *addr, unsigned short count);
  59extern void dma_insl(unsigned long port, void *addr, unsigned short count);
  60
  61/**
  62 * I/O write barrier
  63 *
  64 * Ensure ordering of I/O space writes. This will make sure that writes
  65 * following the barrier will arrive after all previous writes.
  66 */
  67#define mmiowb() do { SSYNC(); wmb(); } while (0)
  68
  69#include <asm-generic/io.h>
  70
  71#endif
  72