arch/powerpc/kernel/iomap.c

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