LXR linux/arch/powerpc/kernel/iomap.c

   1/*
   2 * ppc64 "iomap" interface implementation.
   3 *
   4 * (C) Copyright 2004 Linus Torvalds
   5 */
   6#include <linux/init.h>
   7#include <linux/pci.h>
   8#include <linux/mm.h>
   9#include <asm/io.h>
  10#include <asm/pci-bridge.h>
  11
  12/*
  13 * Here comes the ppc64 implementation of the IOMAP 
  14 * interfaces.
  15 */
  16unsigned int ioread8(void __iomem *addr)
  17{
  18        return readb(addr);
  19}
  20unsigned int ioread16(void __iomem *addr)
  21{
  22        return readw(addr);
  23}
  24unsigned int ioread16be(void __iomem *addr)
  25{
  26        return in_be16(addr);
  27}
  28unsigned int ioread32(void __iomem *addr)
  29{
  30        return readl(addr);
  31}
  32unsigned int ioread32be(void __iomem *addr)
  33{
  34        return in_be32(addr);
  35}
  36EXPORT_SYMBOL(ioread8);
  37EXPORT_SYMBOL(ioread16);
  38EXPORT_SYMBOL(ioread16be);
  39EXPORT_SYMBOL(ioread32);
  40EXPORT_SYMBOL(ioread32be);
  41
  42void iowrite8(u8 val, void __iomem *addr)
  43{
  44        writeb(val, addr);
  45}
  46void iowrite16(u16 val, void __iomem *addr)
  47{
  48        writew(val, addr);
  49}
  50void iowrite16be(u16 val, void __iomem *addr)
  51{
  52        out_be16(addr, val);
  53}
  54void iowrite32(u32 val, void __iomem *addr)
  55{
  56        writel(val, addr);
  57}
  58void iowrite32be(u32 val, void __iomem *addr)
  59{
  60        out_be32(addr, val);
  61}
  62EXPORT_SYMBOL(iowrite8);
  63EXPORT_SYMBOL(iowrite16);
  64EXPORT_SYMBOL(iowrite16be);
  65EXPORT_SYMBOL(iowrite32);
  66EXPORT_SYMBOL(iowrite32be);
  67
  68/*
  69 * These are the "repeat read/write" functions. Note the
  70 * non-CPU byte order. We do things in "IO byteorder"
  71 * here.
  72 *
  73 * FIXME! We could make these do EEH handling if we really
  74 * wanted. Not clear if we do.
  75 */
  76void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
  77{
  78        _insb((u8 __iomem *) addr, dst, count);
  79}
  80void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
  81{
  82        _insw_ns((u16 __iomem *) addr, dst, count);
  83}
  84void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
  85{
  86        _insl_ns((u32 __iomem *) addr, dst, count);
  87}
  88EXPORT_SYMBOL(ioread8_rep);
  89EXPORT_SYMBOL(ioread16_rep);
  90EXPORT_SYMBOL(ioread32_rep);
  91
  92void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
  93{
  94        _outsb((u8 __iomem *) addr, src, count);
  95}
  96void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
  97{
  98        _outsw_ns((u16 __iomem *) addr, src, count);
  99}
 100void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 101{
 102        _outsl_ns((u32 __iomem *) addr, src, count);
 103}
 104EXPORT_SYMBOL(iowrite8_rep);
 105EXPORT_SYMBOL(iowrite16_rep);
 106EXPORT_SYMBOL(iowrite32_rep);
 107
 108void __iomem *ioport_map(unsigned long port, unsigned int len)
 109{
 110        return (void __iomem *) (port + _IO_BASE);
 111}
 112
 113void ioport_unmap(void __iomem *addr)
 114{
 115        /* Nothing to do */
 116}
 117EXPORT_SYMBOL(ioport_map);
 118EXPORT_SYMBOL(ioport_unmap);
 119
 120void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
 121{
 122        resource_size_t start = pci_resource_start(dev, bar);
 123        resource_size_t len = pci_resource_len(dev, bar);
 124        unsigned long flags = pci_resource_flags(dev, bar);
 125
 126        if (!len)
 127                return NULL;
 128        if (max && len > max)
 129                len = max;
 130        if (flags & IORESOURCE_IO)
 131                return ioport_map(start, len);
 132        if (flags & IORESOURCE_MEM)
 133                return ioremap(start, len);
 134        /* What? */
 135        return NULL;
 136}
 137
 138void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 139{
 140        if (isa_vaddr_is_ioport(addr))
 141                return;
 142        if (pcibios_vaddr_is_ioport(addr))
 143                return;
 144        iounmap(addr);
 145}
 146
 147EXPORT_SYMBOL(pci_iomap);
 148EXPORT_SYMBOL(pci_iounmap);
 149