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 #ifdef CONFIG_64BIT
  30 #define NYBBLE_SHIFT 60
  31 #else
  32 #define NYBBLE_SHIFT 28
  33 #endif
  34 extern void gsc_bad_addr(unsigned long addr);
  35 extern void __raw_bad_addr(const volatile void __iomem *addr);
  36 #define gsc_check_addr(addr)                                    \
  37         if ((addr >> NYBBLE_SHIFT) != 0xf) {                    \
  38                 gsc_bad_addr(addr);                             \
  39                 addr |= 0xfUL << NYBBLE_SHIFT;                  \
  40         }
  41 #define __raw_check_addr(addr)                                  \
  42         if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe)       \
  43                 __raw_bad_addr(addr);                   \
  44         addr = (void *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT));
  45 #else
  46 #define gsc_check_addr(addr)
  47 #define __raw_check_addr(addr)
  48 #endif
  49
  50 static inline unsigned char gsc_readb(unsigned long addr)
  51 {
  52         long flags;
  53         unsigned char ret;
  54
  55         gsc_check_addr(addr);
  56
  57         __asm__ __volatile__(
  58         "       rsm     2,%0\n"
  59         "       ldbx    0(%2),%1\n"
  60         "       mtsm    %0\n"
  61         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  62
  63         return ret;
  64 }
  65
  66 static inline unsigned short gsc_readw(unsigned long addr)
  67 {
  68         long flags;
  69         unsigned short ret;
  70
  71         gsc_check_addr(addr);
  72
  73         __asm__ __volatile__(
  74         "       rsm     2,%0\n"
  75         "       ldhx    0(%2),%1\n"
  76         "       mtsm    %0\n"
  77         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  78
  79         return ret;
  80 }
  81
  82 static inline unsigned int gsc_readl(unsigned long addr)
  83 {
  84         u32 ret;
  85
  86         gsc_check_addr(addr);
  87
  88         __asm__ __volatile__(
  89         "       ldwax   0(%1),%0\n"
  90         : "=r" (ret) : "r" (addr) );
  91
  92         return ret;
  93 }
  94
  95 static inline unsigned long long gsc_readq(unsigned long addr)
  96 {
  97         unsigned long long ret;
  98         gsc_check_addr(addr);
  99
 100 #ifdef __LP64__
 101         __asm__ __volatile__(
 102         "       ldda    0(%1),%0\n"
 103         :  "=r" (ret) : "r" (addr) );
 104 #else
 105         /* two reads may have side effects.. */
 106         ret = ((u64) gsc_readl(addr)) << 32;
 107         ret |= gsc_readl(addr+4);
 108 #endif
 109         return ret;
 110 }
 111
 112 static inline void gsc_writeb(unsigned char val, unsigned long addr)
 113 {
 114         long flags;
 115         gsc_check_addr(addr);
 116
 117         __asm__ __volatile__(
 118         "       rsm     2,%0\n"
 119         "       stbs    %1,0(%2)\n"
 120         "       mtsm    %0\n"
 121         : "=&r" (flags) :  "r" (val), "r" (addr) );
 122 }
 123
 124 static inline void gsc_writew(unsigned short val, unsigned long addr)
 125 {
 126         long flags;
 127         gsc_check_addr(addr);
 128
 129         __asm__ __volatile__(
 130         "       rsm     2,%0\n"
 131         "       sths    %1,0(%2)\n"
 132         "       mtsm    %0\n"
 133         : "=&r" (flags) :  "r" (val), "r" (addr) );
 134 }
 135
 136 static inline void gsc_writel(unsigned int val, unsigned long addr)
 137 {
 138         gsc_check_addr(addr);
 139
 140         __asm__ __volatile__(
 141         "       stwas   %0,0(%1)\n"
 142         : :  "r" (val), "r" (addr) );
 143 }
 144
 145 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 146 {
 147         gsc_check_addr(addr);
 148
 149 #ifdef __LP64__
 150         __asm__ __volatile__(
 151         "       stda    %0,0(%1)\n"
 152         : :  "r" (val), "r" (addr) );
 153 #else
 154         /* two writes may have side effects.. */
 155         gsc_writel(val >> 32, addr);
 156         gsc_writel(val, addr+4);
 157 #endif
 158 }
 159
 160 /*
 161  * The standard PCI ioremap interfaces
 162  */
 163
 164 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 165
 166 extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 167 {
 168         return __ioremap(offset, size, 0);
 169 }
 170
 171 /*
 172  * This one maps high address device memory and turns off caching for that area.
 173  * it's useful if some control registers are in such an area and write combining
 174  * or read caching is not desirable:
 175  */
 176 extern inline void * ioremap_nocache(unsigned long offset, unsigned long size)
 177 {
 178         return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */);
 179 }
 180
 181 extern void iounmap(void __iomem *addr);
 182
 183 /*
 184  * USE_HPPA_IOREMAP is the magic flag to enable or disable real ioremap()
 185  * functionality.  It's currently disabled because it may not work on some
 186  * machines.
 187  */
 188 #define USE_HPPA_IOREMAP 0
 189
 190 #if USE_HPPA_IOREMAP
 191 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 192 {
 193         return (*(volatile unsigned char __force *) (addr));
 194 }
 195 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 196 {
 197         return *(volatile unsigned short __force *) addr;
 198 }
 199 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 200 {
 201         return *(volatile unsigned int __force *) addr;
 202 }
 203 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 204 {
 205         return *(volatile unsigned long long __force *) addr;
 206 }
 207
 208 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 209 {
 210         *(volatile unsigned char __force *) addr = b;
 211 }
 212 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 213 {
 214         *(volatile unsigned short __force *) addr = b;
 215 }
 216 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 217 {
 218         *(volatile unsigned int __force *) addr = b;
 219 }
 220 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 221 {
 222         *(volatile unsigned long long __force *) addr = b;
 223 }
 224 #else /* !USE_HPPA_IOREMAP */
 225 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 226 {
 227         __raw_check_addr(addr);
 228
 229         return gsc_readb((unsigned long) addr);
 230 }
 231 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 232 {
 233         __raw_check_addr(addr);
 234
 235         return gsc_readw((unsigned long) addr);
 236 }
 237 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 238 {
 239         __raw_check_addr(addr);
 240
 241         return gsc_readl((unsigned long) addr);
 242 }
 243 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 244 {
 245         __raw_check_addr(addr);
 246
 247         return gsc_readq((unsigned long) addr);
 248 }
 249
 250 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 251 {
 252         __raw_check_addr(addr);
 253
 254         gsc_writeb(b, (unsigned long) addr);
 255 }
 256 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 257 {
 258         __raw_check_addr(addr);
 259
 260         gsc_writew(b, (unsigned long) addr);
 261 }
 262 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 263 {
 264         __raw_check_addr(addr);
 265
 266         gsc_writel(b, (unsigned long) addr);
 267 }
 268 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 269 {
 270         __raw_check_addr(addr);
 271
 272         gsc_writeq(b, (unsigned long) addr);
 273 }
 274 #endif /* !USE_HPPA_IOREMAP */
 275
 276 /* readb can never be const, so use __fswab instead of le*_to_cpu */
 277 #define readb(addr) __raw_readb(addr)
 278 #define readw(addr) __fswab16(__raw_readw(addr))
 279 #define readl(addr) __fswab32(__raw_readl(addr))
 280 #define readq(addr) __fswab64(__raw_readq(addr))
 281 #define writeb(b, addr) __raw_writeb(b, addr)
 282 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
 283 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
 284 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 285
 286 #define readb_relaxed(addr) readb(addr)
 287 #define readw_relaxed(addr) readw(addr)
 288 #define readl_relaxed(addr) readl(addr)
 289 #define readq_relaxed(addr) readq(addr)
 290
 291 #define mmiowb() do { } while (0)
 292
 293 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 294 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 295 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 296
 297 /* Support old drivers which don't ioremap.
 298  * NB this interface is scheduled to disappear in 2.5
 299  */
 300
 301 #define __isa_addr(x) (void __iomem *)(F_EXTEND(0xfc000000) | (x))
 302 #define isa_readb(a) readb(__isa_addr(a))
 303 #define isa_readw(a) readw(__isa_addr(a))
 304 #define isa_readl(a) readl(__isa_addr(a))
 305 #define isa_writeb(b,a) writeb((b), __isa_addr(a))
 306 #define isa_writew(b,a) writew((b), __isa_addr(a))
 307 #define isa_writel(b,a) writel((b), __isa_addr(a))
 308 #define isa_memset_io(a,b,c) memset_io(__isa_addr(a), (b), (c))
 309 #define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), __isa_addr(b), (c))
 310 #define isa_memcpy_toio(a,b,c) memcpy_toio(__isa_addr(a), (b), (c))
 311
 312
 313 /*
 314  * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
 315  * just copy it. The net code will then do the checksum later. Presently
 316  * only used by some shared memory 8390 Ethernet cards anyway.
 317  */
 318
 319 #define eth_io_copy_and_sum(skb,src,len,unused) \
 320   memcpy_fromio((skb)->data,(src),(len))
 321 #define isa_eth_io_copy_and_sum(skb,src,len,unused) \
 322   isa_memcpy_fromio((skb)->data,(src),(len))
 323
 324 /* Port-space IO */
 325
 326 #define inb_p inb
 327 #define inw_p inw
 328 #define inl_p inl
 329 #define outb_p outb
 330 #define outw_p outw
 331 #define outl_p outl
 332
 333 extern unsigned char eisa_in8(unsigned short port);
 334 extern unsigned short eisa_in16(unsigned short port);
 335 extern unsigned int eisa_in32(unsigned short port);
 336 extern void eisa_out8(unsigned char data, unsigned short port);
 337 extern void eisa_out16(unsigned short data, unsigned short port);
 338 extern void eisa_out32(unsigned int data, unsigned short port);
 339
 340 #if defined(CONFIG_PCI)
 341 extern unsigned char inb(int addr);
 342 extern unsigned short inw(int addr);
 343 extern unsigned int inl(int addr);
 344
 345 extern void outb(unsigned char b, int addr);
 346 extern void outw(unsigned short b, int addr);
 347 extern void outl(unsigned int b, int addr);
 348 #elif defined(CONFIG_EISA)
 349 #define inb eisa_in8
 350 #define inw eisa_in16
 351 #define inl eisa_in32
 352 #define outb eisa_out8
 353 #define outw eisa_out16
 354 #define outl eisa_out32
 355 #else
 356 static inline char inb(unsigned long addr)
 357 {
 358         BUG();
 359         return -1;
 360 }
 361
 362 static inline short inw(unsigned long addr)
 363 {
 364         BUG();
 365         return -1;
 366 }
 367
 368 static inline int inl(unsigned long addr)
 369 {
 370         BUG();
 371         return -1;
 372 }
 373
 374 #define outb(x, y)      BUG()
 375 #define outw(x, y)      BUG()
 376 #define outl(x, y)      BUG()
 377 #endif
 378
 379 /*
 380  * String versions of in/out ops:
 381  */
 382 extern void insb (unsigned long port, void *dst, unsigned long count);
 383 extern void insw (unsigned long port, void *dst, unsigned long count);
 384 extern void insl (unsigned long port, void *dst, unsigned long count);
 385 extern void outsb (unsigned long port, const void *src, unsigned long count);
 386 extern void outsw (unsigned long port, const void *src, unsigned long count);
 387 extern void outsl (unsigned long port, const void *src, unsigned long count);
 388
 389
 390 /* IO Port space is :      BBiiii   where BB is HBA number. */
 391 #define IO_SPACE_LIMIT 0x00ffffff
 392
 393
 394 #define dma_cache_inv(_start,_size)             do { flush_kernel_dcache_range(_start,_size); } while (0)
 395 #define dma_cache_wback(_start,_size)           do { flush_kernel_dcache_range(_start,_size); } while (0)
 396 #define dma_cache_wback_inv(_start,_size)       do { flush_kernel_dcache_range(_start,_size); } while (0)
 397
 398 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 399  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 400  * mode (essentially just sign extending.  This macro takes in a 32
 401  * bit I/O address (still with the leading f) and outputs the correct
 402  * value for either 32 or 64 bit mode */
 403 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 404
 405 #include <asm-generic/iomap.h>
 406
 407 /*
 408  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 409  * access
 410  */
 411 #define xlate_dev_mem_ptr(p)    __va(p)
 412
 413 /*
 414  * Convert a virtual cached pointer to an uncached pointer
 415  */
 416 #define xlate_dev_kmem_ptr(p)   p
 417
 418 #endif