target/linux/mpc83xx/patches-2.6.33/010-sysdev_rb_iomap.patch

   1 --- /dev/null
   2 +++ b/arch/powerpc/sysdev/rb_iomap.c
   3 @@ -0,0 +1,223 @@
   4 +#include <linux/init.h>
   5 +#include <linux/pci.h>
   6 +#include <linux/mm.h>
   7 +#include <asm/io.h>
   8 +
   9 +#define LOCALBUS_START         0x40000000
  10 +#define LOCALBUS_MASK          0x007fffff
  11 +#define LOCALBUS_REGMASK       0x001fffff
  12 +
  13 +static void __iomem *localbus_base;
  14 +
  15 +static inline int is_localbus(void __iomem *addr)
  16 +{
  17 +       return ((unsigned) addr & ~LOCALBUS_MASK) == LOCALBUS_START;
  18 +}
  19 +
  20 +static inline unsigned localbus_regoff(unsigned reg) {
  21 +       return (reg << 16) | (((reg ^ 8) & 8) << 17);
  22 +}
  23 +
  24 +static inline void __iomem *localbus_addr(void __iomem *addr)
  25 +{
  26 +       return localbus_base
  27 +           + ((unsigned) addr & LOCALBUS_MASK & ~LOCALBUS_REGMASK)
  28 +           + localbus_regoff((unsigned) addr & LOCALBUS_REGMASK);
  29 +}
  30 +
  31 +unsigned int ioread8(void __iomem *addr)
  32 +{
  33 +       if (is_localbus(addr))
  34 +               return in_be16(localbus_addr(addr)) >> 8;
  35 +       return readb(addr);
  36 +}
  37 +EXPORT_SYMBOL(ioread8);
  38 +
  39 +unsigned int ioread16(void __iomem *addr)
  40 +{
  41 +       if (is_localbus(addr))
  42 +               return le16_to_cpu(in_be16(localbus_addr(addr)));
  43 +       return readw(addr);
  44 +}
  45 +EXPORT_SYMBOL(ioread16);
  46 +
  47 +unsigned int ioread16be(void __iomem *addr)
  48 +{
  49 +       return in_be16(addr);
  50 +}
  51 +EXPORT_SYMBOL(ioread16be);
  52 +
  53 +unsigned int ioread32(void __iomem *addr)
  54 +{
  55 +       return readl(addr);
  56 +}
  57 +EXPORT_SYMBOL(ioread32);
  58 +
  59 +unsigned int ioread32be(void __iomem *addr)
  60 +{
  61 +       return in_be32(addr);
  62 +}
  63 +EXPORT_SYMBOL(ioread32be);
  64 +
  65 +void iowrite8(u8 val, void __iomem *addr)
  66 +{
  67 +       if (is_localbus(addr))
  68 +               out_be16(localbus_addr(addr), ((u16) val) << 8);
  69 +       else
  70 +               writeb(val, addr);
  71 +}
  72 +EXPORT_SYMBOL(iowrite8);
  73 +
  74 +void iowrite16(u16 val, void __iomem *addr)
  75 +{
  76 +       if (is_localbus(addr))
  77 +               out_be16(localbus_addr(addr), cpu_to_le16(val));
  78 +       else
  79 +               writew(val, addr);
  80 +}
  81 +EXPORT_SYMBOL(iowrite16);
  82 +
  83 +void iowrite16be(u16 val, void __iomem *addr)
  84 +{
  85 +       out_be16(addr, val);
  86 +}
  87 +EXPORT_SYMBOL(iowrite16be);
  88 +
  89 +void iowrite32(u32 val, void __iomem *addr)
  90 +{
  91 +       writel(val, addr);
  92 +}
  93 +EXPORT_SYMBOL(iowrite32);
  94 +
  95 +void iowrite32be(u32 val, void __iomem *addr)
  96 +{
  97 +       out_be32(addr, val);
  98 +}
  99 +EXPORT_SYMBOL(iowrite32be);
 100 +
 101 +void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 102 +{
 103 +       if (is_localbus(addr)) {
 104 +               unsigned i;
 105 +               void *laddr = localbus_addr(addr);
 106 +               u8 *buf = dst;
 107 +
 108 +               for (i = 0; i < count; ++i) {
 109 +                       *buf++ = in_be16(laddr) >> 8;
 110 +               }
 111 +       } else {
 112 +               _insb((u8 __iomem *) addr, dst, count);
 113 +       }
 114 +}
 115 +EXPORT_SYMBOL(ioread8_rep);
 116 +
 117 +void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
 118 +{
 119 +       if (is_localbus(addr)) {
 120 +               unsigned i;
 121 +               void *laddr = localbus_addr(addr);
 122 +               u16 *buf = dst;
 123 +
 124 +               for (i = 0; i < count; ++i) {
 125 +                       *buf++ = in_be16(laddr);
 126 +               }
 127 +       } else {
 128 +               _insw_ns((u16 __iomem *) addr, dst, count);
 129 +       }
 130 +}
 131 +EXPORT_SYMBOL(ioread16_rep);
 132 +
 133 +void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
 134 +{
 135 +       _insl_ns((u32 __iomem *) addr, dst, count);
 136 +}
 137 +EXPORT_SYMBOL(ioread32_rep);
 138 +
 139 +void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 140 +{
 141 +       if (is_localbus(addr)) {
 142 +               unsigned i;
 143 +               void *laddr = localbus_addr(addr);
 144 +               const u8 *buf = src;
 145 +
 146 +               for (i = 0; i < count; ++i) {
 147 +                       out_be16(laddr, ((u16) *buf++) << 8);
 148 +               }
 149 +       } else {
 150 +               _outsb((u8 __iomem *) addr, src, count);
 151 +       }
 152 +}
 153 +EXPORT_SYMBOL(iowrite8_rep);
 154 +
 155 +void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 156 +{
 157 +       if (is_localbus(addr)) {
 158 +               unsigned i;
 159 +               void *laddr = localbus_addr(addr);
 160 +               const u16 *buf = src;
 161 +
 162 +               for (i = 0; i < count; ++i) {
 163 +                       out_be16(laddr, *buf++);
 164 +               }
 165 +       } else {
 166 +               _outsw_ns((u16 __iomem *) addr, src, count);
 167 +       }
 168 +}
 169 +EXPORT_SYMBOL(iowrite16_rep);
 170 +
 171 +void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 172 +{
 173 +       _outsl_ns((u32 __iomem *) addr, src, count);
 174 +}
 175 +EXPORT_SYMBOL(iowrite32_rep);
 176 +
 177 +void __iomem *ioport_map(unsigned long port, unsigned int len)
 178 +{
 179 +       return (void __iomem *) (port + _IO_BASE);
 180 +}
 181 +EXPORT_SYMBOL(ioport_unmap);
 182 +
 183 +void ioport_unmap(void __iomem *addr)
 184 +{
 185 +       /* Nothing to do */
 186 +}
 187 +EXPORT_SYMBOL(ioport_map);
 188 +
 189 +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
 190 +{
 191 +       unsigned long start = pci_resource_start(dev, bar);
 192 +       unsigned long len = pci_resource_len(dev, bar);
 193 +       unsigned long flags = pci_resource_flags(dev, bar);
 194 +
 195 +       if (!len)
 196 +               return NULL;
 197 +       if (max && len > max)
 198 +               len = max;
 199 +       if (flags & IORESOURCE_IO)
 200 +               return ioport_map(start, len);
 201 +       if (flags & IORESOURCE_MEM)
 202 +               return ioremap(start, len);
 203 +       /* What? */
 204 +       return NULL;
 205 +}
 206 +EXPORT_SYMBOL(pci_iomap);
 207 +
 208 +void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 209 +{
 210 +       /* Nothing to do */
 211 +}
 212 +EXPORT_SYMBOL(pci_iounmap);
 213 +
 214 +void __iomem *localbus_map(unsigned long addr, unsigned int len)
 215 +{
 216 +       if (!localbus_base)
 217 +               localbus_base = ioremap(addr & ~LOCALBUS_MASK,
 218 +                                       LOCALBUS_MASK + 1);
 219 +       return (void *) (LOCALBUS_START + (addr & LOCALBUS_MASK));
 220 +}
 221 +EXPORT_SYMBOL(localbus_map);
 222 +
 223 +void localbus_unmap(void __iomem *addr)
 224 +{
 225 +}
 226 +EXPORT_SYMBOL(localbus_unmap);