include/asm-parisc/io.h

   1 #ifndef _ASM_IO_H
   2 #define _ASM_IO_H
   3
   4 #include <linux/config.h>
   5 #include <linux/types.h>
   6 #include <asm/pgtable.h>
   7
   8 extern unsigned long parisc_vmerge_boundary;
   9 extern unsigned long parisc_vmerge_max_size;
  10
  11 #define BIO_VMERGE_BOUNDARY     parisc_vmerge_boundary
  12 #define BIO_VMERGE_MAX_SIZE     parisc_vmerge_max_size
  13
  14 #define virt_to_phys(a) ((unsigned long)__pa(a))
  15 #define phys_to_virt(a) __va(a)
  16 #define virt_to_bus virt_to_phys
  17 #define bus_to_virt phys_to_virt
  18
  19 /*
  20  * Memory mapped I/O
  21  *
  22  * readX()/writeX() do byteswapping and take an ioremapped address
  23  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  24  * gsc_*() don't byteswap and operate on physical addresses;
  25  *   eg dev->hpa or 0xfee00000.
  26  */
  27
  28 #ifdef CONFIG_DEBUG_IOREMAP
  29 #define NYBBLE_SHIFT (BITS_PER_LONG - 4)
  30 extern void gsc_bad_addr(unsigned long addr);
  31 extern void __raw_bad_addr(const volatile void __iomem *addr);
  32 #define gsc_check_addr(addr)                                    \
  33         if ((addr >> NYBBLE_SHIFT) != 0xf) {                    \
  34                 gsc_bad_addr(addr);                             \
  35                 addr |= 0xfUL << NYBBLE_SHIFT;                  \
  36         }
  37 #define __raw_check_addr(addr)                                  \
  38         if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe)       \
  39                 __raw_bad_addr(addr);                   \
  40         addr = (void __iomem *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT));
  41 #else
  42 #define gsc_check_addr(addr)
  43 #define __raw_check_addr(addr)
  44 #endif
  45
  46 static inline unsigned char gsc_readb(unsigned long addr)
  47 {
  48         long flags;
  49         unsigned char ret;
  50
  51         gsc_check_addr(addr);
  52
  53         __asm__ __volatile__(
  54         "       rsm     2,%0\n"
  55         "       ldbx    0(%2),%1\n"
  56         "       mtsm    %0\n"
  57         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  58
  59         return ret;
  60 }
  61
  62 static inline unsigned short gsc_readw(unsigned long addr)
  63 {
  64         long flags;
  65         unsigned short ret;
  66
  67         gsc_check_addr(addr);
  68
  69         __asm__ __volatile__(
  70         "       rsm     2,%0\n"
  71         "       ldhx    0(%2),%1\n"
  72         "       mtsm    %0\n"
  73         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  74
  75         return ret;
  76 }
  77
  78 static inline unsigned int gsc_readl(unsigned long addr)
  79 {
  80         u32 ret;
  81
  82         gsc_check_addr(addr);
  83
  84         __asm__ __volatile__(
  85         "       ldwax   0(%1),%0\n"
  86         : "=r" (ret) : "r" (addr) );
  87
  88         return ret;
  89 }
  90
  91 static inline unsigned long long gsc_readq(unsigned long addr)
  92 {
  93         unsigned long long ret;
  94         gsc_check_addr(addr);
  95
  96 #ifdef __LP64__
  97         __asm__ __volatile__(
  98         "       ldda    0(%1),%0\n"
  99         :  "=r" (ret) : "r" (addr) );
 100 #else
 101         /* two reads may have side effects.. */
 102         ret = ((u64) gsc_readl(addr)) << 32;
 103         ret |= gsc_readl(addr+4);
 104 #endif
 105         return ret;
 106 }
 107
 108 static inline void gsc_writeb(unsigned char val, unsigned long addr)
 109 {
 110         long flags;
 111         gsc_check_addr(addr);
 112
 113         __asm__ __volatile__(
 114         "       rsm     2,%0\n"
 115         "       stbs    %1,0(%2)\n"
 116         "       mtsm    %0\n"
 117         : "=&r" (flags) :  "r" (val), "r" (addr) );
 118 }
 119
 120 static inline void gsc_writew(unsigned short val, unsigned long addr)
 121 {
 122         long flags;
 123         gsc_check_addr(addr);
 124
 125         __asm__ __volatile__(
 126         "       rsm     2,%0\n"
 127         "       sths    %1,0(%2)\n"
 128         "       mtsm    %0\n"
 129         : "=&r" (flags) :  "r" (val), "r" (addr) );
 130 }
 131
 132 static inline void gsc_writel(unsigned int val, unsigned long addr)
 133 {
 134         gsc_check_addr(addr);
 135
 136         __asm__ __volatile__(
 137         "       stwas   %0,0(%1)\n"
 138         : :  "r" (val), "r" (addr) );
 139 }
 140
 141 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 142 {
 143         gsc_check_addr(addr);
 144
 145 #ifdef __LP64__
 146         __asm__ __volatile__(
 147         "       stda    %0,0(%1)\n"
 148         : :  "r" (val), "r" (addr) );
 149 #else
 150         /* two writes may have side effects.. */
 151         gsc_writel(val >> 32, addr);
 152         gsc_writel(val, addr+4);
 153 #endif
 154 }
 155
 156 /*
 157  * The standard PCI ioremap interfaces
 158  */
 159
 160 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 161
 162 extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 163 {
 164         return __ioremap(offset, size, 0);
 165 }
 166
 167 /*
 168  * This one maps high address device memory and turns off caching for that area.
 169  * it's useful if some control registers are in such an area and write combining
 170  * or read caching is not desirable:
 171  */
 172 extern inline void * ioremap_nocache(unsigned long offset, unsigned long size)
 173 {
 174         return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */);
 175 }
 176
 177 extern void iounmap(void __iomem *addr);
 178
 179
 180 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 181 {
 182         return (*(volatile unsigned char __force *) (addr));
 183 }
 184 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 185 {
 186         return *(volatile unsigned short __force *) addr;
 187 }
 188 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 189 {
 190         return *(volatile unsigned int __force *) addr;
 191 }
 192 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 193 {
 194         return *(volatile unsigned long long __force *) addr;
 195 }
 196
 197 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 198 {
 199         *(volatile unsigned char __force *) addr = b;
 200 }
 201 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 202 {
 203         *(volatile unsigned short __force *) addr = b;
 204 }
 205 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 206 {
 207         *(volatile unsigned int __force *) addr = b;
 208 }
 209 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 210 {
 211         *(volatile unsigned long long __force *) addr = b;
 212 }
 213
 214 /* readb can never be const, so use __fswab instead of le*_to_cpu */
 215 #define readb(addr) __raw_readb(addr)
 216 #define readw(addr) __fswab16(__raw_readw(addr))
 217 #define readl(addr) __fswab32(__raw_readl(addr))
 218 #define readq(addr) __fswab64(__raw_readq(addr))
 219 #define writeb(b, addr) __raw_writeb(b, addr)
 220 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
 221 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
 222 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 223
 224 #define readb_relaxed(addr) readb(addr)
 225 #define readw_relaxed(addr) readw(addr)
 226 #define readl_relaxed(addr) readl(addr)
 227 #define readq_relaxed(addr) readq(addr)
 228
 229 #define mmiowb() do { } while (0)
 230
 231 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 232 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 233 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 234
 235 /*
 236  * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
 237  * just copy it. The net code will then do the checksum later. Presently
 238  * only used by some shared memory 8390 Ethernet cards anyway.
 239  */
 240
 241 #define eth_io_copy_and_sum(skb,src,len,unused) \
 242   memcpy_fromio((skb)->data,(src),(len))
 243
 244 /* Port-space IO */
 245
 246 #define inb_p inb
 247 #define inw_p inw
 248 #define inl_p inl
 249 #define outb_p outb
 250 #define outw_p outw
 251 #define outl_p outl
 252
 253 extern unsigned char eisa_in8(unsigned short port);
 254 extern unsigned short eisa_in16(unsigned short port);
 255 extern unsigned int eisa_in32(unsigned short port);
 256 extern void eisa_out8(unsigned char data, unsigned short port);
 257 extern void eisa_out16(unsigned short data, unsigned short port);
 258 extern void eisa_out32(unsigned int data, unsigned short port);
 259
 260 #if defined(CONFIG_PCI)
 261 extern unsigned char inb(int addr);
 262 extern unsigned short inw(int addr);
 263 extern unsigned int inl(int addr);
 264
 265 extern void outb(unsigned char b, int addr);
 266 extern void outw(unsigned short b, int addr);
 267 extern void outl(unsigned int b, int addr);
 268 #elif defined(CONFIG_EISA)
 269 #define inb eisa_in8
 270 #define inw eisa_in16
 271 #define inl eisa_in32
 272 #define outb eisa_out8
 273 #define outw eisa_out16
 274 #define outl eisa_out32
 275 #else
 276 static inline char inb(unsigned long addr)
 277 {
 278         BUG();
 279         return -1;
 280 }
 281
 282 static inline short inw(unsigned long addr)
 283 {
 284         BUG();
 285         return -1;
 286 }
 287
 288 static inline int inl(unsigned long addr)
 289 {
 290         BUG();
 291         return -1;
 292 }
 293
 294 #define outb(x, y)      BUG()
 295 #define outw(x, y)      BUG()
 296 #define outl(x, y)      BUG()
 297 #endif
 298
 299 /*
 300  * String versions of in/out ops:
 301  */
 302 extern void insb (unsigned long port, void *dst, unsigned long count);
 303 extern void insw (unsigned long port, void *dst, unsigned long count);
 304 extern void insl (unsigned long port, void *dst, unsigned long count);
 305 extern void outsb (unsigned long port, const void *src, unsigned long count);
 306 extern void outsw (unsigned long port, const void *src, unsigned long count);
 307 extern void outsl (unsigned long port, const void *src, unsigned long count);
 308
 309
 310 /* IO Port space is :      BBiiii   where BB is HBA number. */
 311 #define IO_SPACE_LIMIT 0x00ffffff
 312
 313
 314 #define dma_cache_inv(_start,_size)             do { flush_kernel_dcache_range(_start,_size); } while (0)
 315 #define dma_cache_wback(_start,_size)           do { flush_kernel_dcache_range(_start,_size); } while (0)
 316 #define dma_cache_wback_inv(_start,_size)       do { flush_kernel_dcache_range(_start,_size); } while (0)
 317
 318 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 319  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 320  * mode (essentially just sign extending.  This macro takes in a 32
 321  * bit I/O address (still with the leading f) and outputs the correct
 322  * value for either 32 or 64 bit mode */
 323 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 324
 325 #include <asm-generic/iomap.h>
 326
 327 /*
 328  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 329  * access
 330  */
 331 #define xlate_dev_mem_ptr(p)    __va(p)
 332
 333 /*
 334  * Convert a virtual cached pointer to an uncached pointer
 335  */
 336 #define xlate_dev_kmem_ptr(p)   p
 337
 338 #endif