release/src-rt-6.x.4708/linux/linux-2.6.36/arch/parisc/include/asm/io.h

   1 #ifndef _ASM_IO_H
   2 #define _ASM_IO_H
   3
   4 #include <linux/types.h>
   5 #include <asm/pgtable.h>
   6
   7 #define virt_to_phys(a) ((unsigned long)__pa(a))
   8 #define phys_to_virt(a) __va(a)
   9 #define virt_to_bus virt_to_phys
  10 #define bus_to_virt phys_to_virt
  11
  12 static inline unsigned long isa_bus_to_virt(unsigned long addr) {
  13         BUG();
  14         return 0;
  15 }
  16
  17 static inline unsigned long isa_virt_to_bus(void *addr) {
  18         BUG();
  19         return 0;
  20 }
  21
  22 /*
  23  * Memory mapped I/O
  24  *
  25  * readX()/writeX() do byteswapping and take an ioremapped address
  26  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  27  * gsc_*() don't byteswap and operate on physical addresses;
  28  *   eg dev->hpa or 0xfee00000.
  29  */
  30
  31 static inline unsigned char gsc_readb(unsigned long addr)
  32 {
  33         long flags;
  34         unsigned char ret;
  35
  36         __asm__ __volatile__(
  37         "       rsm     2,%0\n"
  38         "       ldbx    0(%2),%1\n"
  39         "       mtsm    %0\n"
  40         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  41
  42         return ret;
  43 }
  44
  45 static inline unsigned short gsc_readw(unsigned long addr)
  46 {
  47         long flags;
  48         unsigned short ret;
  49
  50         __asm__ __volatile__(
  51         "       rsm     2,%0\n"
  52         "       ldhx    0(%2),%1\n"
  53         "       mtsm    %0\n"
  54         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  55
  56         return ret;
  57 }
  58
  59 static inline unsigned int gsc_readl(unsigned long addr)
  60 {
  61         u32 ret;
  62
  63         __asm__ __volatile__(
  64         "       ldwax   0(%1),%0\n"
  65         : "=r" (ret) : "r" (addr) );
  66
  67         return ret;
  68 }
  69
  70 static inline unsigned long long gsc_readq(unsigned long addr)
  71 {
  72         unsigned long long ret;
  73
  74 #ifdef CONFIG_64BIT
  75         __asm__ __volatile__(
  76         "       ldda    0(%1),%0\n"
  77         :  "=r" (ret) : "r" (addr) );
  78 #else
  79         /* two reads may have side effects.. */
  80         ret = ((u64) gsc_readl(addr)) << 32;
  81         ret |= gsc_readl(addr+4);
  82 #endif
  83         return ret;
  84 }
  85
  86 static inline void gsc_writeb(unsigned char val, unsigned long addr)
  87 {
  88         long flags;
  89         __asm__ __volatile__(
  90         "       rsm     2,%0\n"
  91         "       stbs    %1,0(%2)\n"
  92         "       mtsm    %0\n"
  93         : "=&r" (flags) :  "r" (val), "r" (addr) );
  94 }
  95
  96 static inline void gsc_writew(unsigned short val, unsigned long addr)
  97 {
  98         long flags;
  99         __asm__ __volatile__(
 100         "       rsm     2,%0\n"
 101         "       sths    %1,0(%2)\n"
 102         "       mtsm    %0\n"
 103         : "=&r" (flags) :  "r" (val), "r" (addr) );
 104 }
 105
 106 static inline void gsc_writel(unsigned int val, unsigned long addr)
 107 {
 108         __asm__ __volatile__(
 109         "       stwas   %0,0(%1)\n"
 110         : :  "r" (val), "r" (addr) );
 111 }
 112
 113 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 114 {
 115 #ifdef CONFIG_64BIT
 116         __asm__ __volatile__(
 117         "       stda    %0,0(%1)\n"
 118         : :  "r" (val), "r" (addr) );
 119 #else
 120         /* two writes may have side effects.. */
 121         gsc_writel(val >> 32, addr);
 122         gsc_writel(val, addr+4);
 123 #endif
 124 }
 125
 126 /*
 127  * The standard PCI ioremap interfaces
 128  */
 129
 130 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 131
 132 /* Most machines react poorly to I/O-space being cacheable... Instead let's
 133  * define ioremap() in terms of ioremap_nocache().
 134  */
 135 static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 136 {
 137         return __ioremap(offset, size, _PAGE_NO_CACHE);
 138 }
 139 #define ioremap_nocache(off, sz)        ioremap((off), (sz))
 140
 141 extern void iounmap(const volatile void __iomem *addr);
 142
 143 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 144 {
 145         return (*(volatile unsigned char __force *) (addr));
 146 }
 147 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 148 {
 149         return *(volatile unsigned short __force *) addr;
 150 }
 151 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 152 {
 153         return *(volatile unsigned int __force *) addr;
 154 }
 155 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 156 {
 157         return *(volatile unsigned long long __force *) addr;
 158 }
 159
 160 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 161 {
 162         *(volatile unsigned char __force *) addr = b;
 163 }
 164 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 165 {
 166         *(volatile unsigned short __force *) addr = b;
 167 }
 168 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 169 {
 170         *(volatile unsigned int __force *) addr = b;
 171 }
 172 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 173 {
 174         *(volatile unsigned long long __force *) addr = b;
 175 }
 176
 177 static inline unsigned char readb(const volatile void __iomem *addr)
 178 {
 179         return __raw_readb(addr);
 180 }
 181 static inline unsigned short readw(const volatile void __iomem *addr)
 182 {
 183         return le16_to_cpu(__raw_readw(addr));
 184 }
 185 static inline unsigned int readl(const volatile void __iomem *addr)
 186 {
 187         return le32_to_cpu(__raw_readl(addr));
 188 }
 189 static inline unsigned long long readq(const volatile void __iomem *addr)
 190 {
 191         return le64_to_cpu(__raw_readq(addr));
 192 }
 193
 194 static inline void writeb(unsigned char b, volatile void __iomem *addr)
 195 {
 196         __raw_writeb(b, addr);
 197 }
 198 static inline void writew(unsigned short w, volatile void __iomem *addr)
 199 {
 200         __raw_writew(cpu_to_le16(w), addr);
 201 }
 202 static inline void writel(unsigned int l, volatile void __iomem *addr)
 203 {
 204         __raw_writel(cpu_to_le32(l), addr);
 205 }
 206 static inline void writeq(unsigned long long q, volatile void __iomem *addr)
 207 {
 208         __raw_writeq(cpu_to_le64(q), addr);
 209 }
 210
 211 #define readb   readb
 212 #define readw   readw
 213 #define readl   readl
 214 #define readq   readq
 215 #define writeb  writeb
 216 #define writew  writew
 217 #define writel  writel
 218 #define writeq  writeq
 219
 220 #define readb_relaxed(addr) readb(addr)
 221 #define readw_relaxed(addr) readw(addr)
 222 #define readl_relaxed(addr) readl(addr)
 223 #define readq_relaxed(addr) readq(addr)
 224
 225 #define mmiowb() do { } while (0)
 226
 227 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 228 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 229 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 230
 231 /* Port-space IO */
 232
 233 #define inb_p inb
 234 #define inw_p inw
 235 #define inl_p inl
 236 #define outb_p outb
 237 #define outw_p outw
 238 #define outl_p outl
 239
 240 extern unsigned char eisa_in8(unsigned short port);
 241 extern unsigned short eisa_in16(unsigned short port);
 242 extern unsigned int eisa_in32(unsigned short port);
 243 extern void eisa_out8(unsigned char data, unsigned short port);
 244 extern void eisa_out16(unsigned short data, unsigned short port);
 245 extern void eisa_out32(unsigned int data, unsigned short port);
 246
 247 #if defined(CONFIG_PCI)
 248 extern unsigned char inb(int addr);
 249 extern unsigned short inw(int addr);
 250 extern unsigned int inl(int addr);
 251
 252 extern void outb(unsigned char b, int addr);
 253 extern void outw(unsigned short b, int addr);
 254 extern void outl(unsigned int b, int addr);
 255 #elif defined(CONFIG_EISA)
 256 #define inb eisa_in8
 257 #define inw eisa_in16
 258 #define inl eisa_in32
 259 #define outb eisa_out8
 260 #define outw eisa_out16
 261 #define outl eisa_out32
 262 #else
 263 static inline char inb(unsigned long addr)
 264 {
 265         BUG();
 266         return -1;
 267 }
 268
 269 static inline short inw(unsigned long addr)
 270 {
 271         BUG();
 272         return -1;
 273 }
 274
 275 static inline int inl(unsigned long addr)
 276 {
 277         BUG();
 278         return -1;
 279 }
 280
 281 #define outb(x, y)      BUG()
 282 #define outw(x, y)      BUG()
 283 #define outl(x, y)      BUG()
 284 #endif
 285
 286 /*
 287  * String versions of in/out ops:
 288  */
 289 extern void insb (unsigned long port, void *dst, unsigned long count);
 290 extern void insw (unsigned long port, void *dst, unsigned long count);
 291 extern void insl (unsigned long port, void *dst, unsigned long count);
 292 extern void outsb (unsigned long port, const void *src, unsigned long count);
 293 extern void outsw (unsigned long port, const void *src, unsigned long count);
 294 extern void outsl (unsigned long port, const void *src, unsigned long count);
 295
 296
 297 /* IO Port space is :      BBiiii   where BB is HBA number. */
 298 #define IO_SPACE_LIMIT 0x00ffffff
 299
 300 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 301  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 302  * mode (essentially just sign extending.  This macro takes in a 32
 303  * bit I/O address (still with the leading f) and outputs the correct
 304  * value for either 32 or 64 bit mode */
 305 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 306
 307 #include <asm-generic/iomap.h>
 308
 309 /*
 310  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 311  * access
 312  */
 313 #define xlate_dev_mem_ptr(p)    __va(p)
 314
 315 /*
 316  * Convert a virtual cached pointer to an uncached pointer
 317  */
 318 #define xlate_dev_kmem_ptr(p)   p
 319
 320 #endif