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  */
  16 unsigned int ioread8(void __iomem *addr)
  17 {
  18         return readb(addr);
  19 }
  20 unsigned int ioread16(void __iomem *addr)
  21 {
  22         return readw(addr);
  23 }
  24 unsigned int ioread16be(void __iomem *addr)
  25 {
  26         return in_be16(addr);
  27 }
  28 unsigned int ioread32(void __iomem *addr)
  29 {
  30         return readl(addr);
  31 }
  32 unsigned int ioread32be(void __iomem *addr)
  33 {
  34         return in_be32(addr);
  35 }
  36 EXPORT_SYMBOL(ioread8);
  37 EXPORT_SYMBOL(ioread16);
  38 EXPORT_SYMBOL(ioread16be);
  39 EXPORT_SYMBOL(ioread32);
  40 EXPORT_SYMBOL(ioread32be);
  41
  42 void iowrite8(u8 val, void __iomem *addr)
  43 {
  44         writeb(val, addr);
  45 }
  46 void iowrite16(u16 val, void __iomem *addr)
  47 {
  48         writew(val, addr);
  49 }
  50 void iowrite16be(u16 val, void __iomem *addr)
  51 {
  52         out_be16(addr, val);
  53 }
  54 void iowrite32(u32 val, void __iomem *addr)
  55 {
  56         writel(val, addr);
  57 }
  58 void iowrite32be(u32 val, void __iomem *addr)
  59 {
  60         out_be32(addr, val);
  61 }
  62 EXPORT_SYMBOL(iowrite8);
  63 EXPORT_SYMBOL(iowrite16);
  64 EXPORT_SYMBOL(iowrite16be);
  65 EXPORT_SYMBOL(iowrite32);
  66 EXPORT_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  */
  76 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
  77 {
  78         _insb((u8 __iomem *) addr, dst, count);
  79 }
  80 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
  81 {
  82         _insw_ns((u16 __iomem *) addr, dst, count);
  83 }
  84 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
  85 {
  86         _insl_ns((u32 __iomem *) addr, dst, count);
  87 }
  88 EXPORT_SYMBOL(ioread8_rep);
  89 EXPORT_SYMBOL(ioread16_rep);
  90 EXPORT_SYMBOL(ioread32_rep);
  91
  92 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
  93 {
  94         _outsb((u8 __iomem *) addr, src, count);
  95 }
  96 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
  97 {
  98         _outsw_ns((u16 __iomem *) addr, src, count);
  99 }
 100 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 101 {
 102         _outsl_ns((u32 __iomem *) addr, src, count);
 103 }
 104 EXPORT_SYMBOL(iowrite8_rep);
 105 EXPORT_SYMBOL(iowrite16_rep);
 106 EXPORT_SYMBOL(iowrite32_rep);
 107
 108 void __iomem *ioport_map(unsigned long port, unsigned int len)
 109 {
 110         return (void __iomem *) (port + _IO_BASE);
 111 }
 112
 113 void ioport_unmap(void __iomem *addr)
 114 {
 115         /* Nothing to do */
 116 }
 117 EXPORT_SYMBOL(ioport_map);
 118 EXPORT_SYMBOL(ioport_unmap);
 119
 120 void __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
 138 void 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
 147 EXPORT_SYMBOL(pci_iomap);
 148 EXPORT_SYMBOL(pci_iounmap);