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