arch/powerpc/kernel/iomap.c

   1 /*
   2  * ppc64 "iomap" interface implementation.
   3  *
   4  * (C) Copyright 2004 Linus Torvalds
   5  */
   6 #include <linux/pci.h>
   7 #include <linux/mm.h>
   8 #include <linux/export.h>
   9 #include <asm/io.h>
  10 #include <asm/pci-bridge.h>
  11 #include <asm/isa-bridge.h>
  12
  13 /*
  14  * Here comes the ppc64 implementation of the IOMAP
  15  * interfaces.
  16  */
  17 unsigned int ioread8(void __iomem *addr)
  18 {
  19         return readb(addr);
  20 }
  21 unsigned int ioread16(void __iomem *addr)
  22 {
  23         return readw(addr);
  24 }
  25 unsigned int ioread16be(void __iomem *addr)
  26 {
  27         return readw_be(addr);
  28 }
  29 unsigned int ioread32(void __iomem *addr)
  30 {
  31         return readl(addr);
  32 }
  33 unsigned int ioread32be(void __iomem *addr)
  34 {
  35         return readl_be(addr);
  36 }
  37 EXPORT_SYMBOL(ioread8);
  38 EXPORT_SYMBOL(ioread16);
  39 EXPORT_SYMBOL(ioread16be);
  40 EXPORT_SYMBOL(ioread32);
  41 EXPORT_SYMBOL(ioread32be);
  42 #ifdef __powerpc64__
  43 u64 ioread64(void __iomem *addr)
  44 {
  45         return readq(addr);
  46 }
  47 u64 ioread64be(void __iomem *addr)
  48 {
  49         return readq_be(addr);
  50 }
  51 EXPORT_SYMBOL(ioread64);
  52 EXPORT_SYMBOL(ioread64be);
  53 #endif /* __powerpc64__ */
  54
  55 void iowrite8(u8 val, void __iomem *addr)
  56 {
  57         writeb(val, addr);
  58 }
  59 void iowrite16(u16 val, void __iomem *addr)
  60 {
  61         writew(val, addr);
  62 }
  63 void iowrite16be(u16 val, void __iomem *addr)
  64 {
  65         writew_be(val, addr);
  66 }
  67 void iowrite32(u32 val, void __iomem *addr)
  68 {
  69         writel(val, addr);
  70 }
  71 void iowrite32be(u32 val, void __iomem *addr)
  72 {
  73         writel_be(val, addr);
  74 }
  75 EXPORT_SYMBOL(iowrite8);
  76 EXPORT_SYMBOL(iowrite16);
  77 EXPORT_SYMBOL(iowrite16be);
  78 EXPORT_SYMBOL(iowrite32);
  79 EXPORT_SYMBOL(iowrite32be);
  80 #ifdef __powerpc64__
  81 void iowrite64(u64 val, void __iomem *addr)
  82 {
  83         writeq(val, addr);
  84 }
  85 void iowrite64be(u64 val, void __iomem *addr)
  86 {
  87         writeq_be(val, addr);
  88 }
  89 EXPORT_SYMBOL(iowrite64);
  90 EXPORT_SYMBOL(iowrite64be);
  91 #endif /* __powerpc64__ */
  92
  93 /*
  94  * These are the "repeat read/write" functions. Note the
  95  * non-CPU byte order. We do things in "IO byteorder"
  96  * here.
  97  *
  98  * FIXME! We could make these do EEH handling if we really
  99  * wanted. Not clear if we do.
 100  */
 101 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 102 {
 103         readsb(addr, dst, count);
 104 }
 105 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
 106 {
 107         readsw(addr, dst, count);
 108 }
 109 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
 110 {
 111         readsl(addr, dst, count);
 112 }
 113 EXPORT_SYMBOL(ioread8_rep);
 114 EXPORT_SYMBOL(ioread16_rep);
 115 EXPORT_SYMBOL(ioread32_rep);
 116
 117 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 118 {
 119         writesb(addr, src, count);
 120 }
 121 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 122 {
 123         writesw(addr, src, count);
 124 }
 125 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 126 {
 127         writesl(addr, src, count);
 128 }
 129 EXPORT_SYMBOL(iowrite8_rep);
 130 EXPORT_SYMBOL(iowrite16_rep);
 131 EXPORT_SYMBOL(iowrite32_rep);
 132
 133 void __iomem *ioport_map(unsigned long port, unsigned int len)
 134 {
 135         return (void __iomem *) (port + _IO_BASE);
 136 }
 137
 138 void ioport_unmap(void __iomem *addr)
 139 {
 140         /* Nothing to do */
 141 }
 142 EXPORT_SYMBOL(ioport_map);
 143 EXPORT_SYMBOL(ioport_unmap);
 144
 145 #ifdef CONFIG_PCI
 146 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 147 {
 148         if (isa_vaddr_is_ioport(addr))
 149                 return;
 150         if (pcibios_vaddr_is_ioport(addr))
 151                 return;
 152         iounmap(addr);
 153 }
 154
 155 EXPORT_SYMBOL(pci_iounmap);
 156 #endif /* CONFIG_PCI */