include/asm-sparc64/io.h

   1 #ifndef __SPARC64_IO_H
   2 #define __SPARC64_IO_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/compiler.h>
   6 #include <linux/types.h>
   7
   8 #include <asm/page.h>      /* IO address mapping routines need this */
   9 #include <asm/system.h>
  10 #include <asm/asi.h>
  11
  12 /* PC crapola... */
  13 #define __SLOW_DOWN_IO  do { } while (0)
  14 #define SLOW_DOWN_IO    do { } while (0)
  15
  16 /* BIO layer definitions. */
  17 extern unsigned long kern_base, kern_size;
  18 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
  19 #define BIO_VMERGE_BOUNDARY     8192
  20
  21 static inline u8 _inb(unsigned long addr)
  22 {
  23         u8 ret;
  24
  25         __asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_inb */"
  26                              : "=r" (ret)
  27                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  28                              : "memory");
  29
  30         return ret;
  31 }
  32
  33 static inline u16 _inw(unsigned long addr)
  34 {
  35         u16 ret;
  36
  37         __asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_inw */"
  38                              : "=r" (ret)
  39                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  40                              : "memory");
  41
  42         return ret;
  43 }
  44
  45 static inline u32 _inl(unsigned long addr)
  46 {
  47         u32 ret;
  48
  49         __asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_inl */"
  50                              : "=r" (ret)
  51                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  52                              : "memory");
  53
  54         return ret;
  55 }
  56
  57 static inline void _outb(u8 b, unsigned long addr)
  58 {
  59         __asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_outb */"
  60                              : /* no outputs */
  61                              : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  62                              : "memory");
  63 }
  64
  65 static inline void _outw(u16 w, unsigned long addr)
  66 {
  67         __asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_outw */"
  68                              : /* no outputs */
  69                              : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  70                              : "memory");
  71 }
  72
  73 static inline void _outl(u32 l, unsigned long addr)
  74 {
  75         __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_outl */"
  76                              : /* no outputs */
  77                              : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
  78                              : "memory");
  79 }
  80
  81 #define inb(__addr)             (_inb((unsigned long)(__addr)))
  82 #define inw(__addr)             (_inw((unsigned long)(__addr)))
  83 #define inl(__addr)             (_inl((unsigned long)(__addr)))
  84 #define outb(__b, __addr)       (_outb((u8)(__b), (unsigned long)(__addr)))
  85 #define outw(__w, __addr)       (_outw((u16)(__w), (unsigned long)(__addr)))
  86 #define outl(__l, __addr)       (_outl((u32)(__l), (unsigned long)(__addr)))
  87
  88 #define inb_p(__addr)           inb(__addr)
  89 #define outb_p(__b, __addr)     outb(__b, __addr)
  90 #define inw_p(__addr)           inw(__addr)
  91 #define outw_p(__w, __addr)     outw(__w, __addr)
  92 #define inl_p(__addr)           inl(__addr)
  93 #define outl_p(__l, __addr)     outl(__l, __addr)
  94
  95 extern void outsb(unsigned long, const void *, unsigned long);
  96 extern void outsw(unsigned long, const void *, unsigned long);
  97 extern void outsl(unsigned long, const void *, unsigned long);
  98 extern void insb(unsigned long, void *, unsigned long);
  99 extern void insw(unsigned long, void *, unsigned long);
 100 extern void insl(unsigned long, void *, unsigned long);
 101
 102 static inline void ioread8_rep(void __iomem *port, void *buf, unsigned long count)
 103 {
 104         insb((unsigned long __force)port, buf, count);
 105 }
 106 static inline void ioread16_rep(void __iomem *port, void *buf, unsigned long count)
 107 {
 108         insw((unsigned long __force)port, buf, count);
 109 }
 110
 111 static inline void ioread32_rep(void __iomem *port, void *buf, unsigned long count)
 112 {
 113         insl((unsigned long __force)port, buf, count);
 114 }
 115
 116 static inline void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count)
 117 {
 118         outsb((unsigned long __force)port, buf, count);
 119 }
 120
 121 static inline void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count)
 122 {
 123         outsw((unsigned long __force)port, buf, count);
 124 }
 125
 126 static inline void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count)
 127 {
 128         outsl((unsigned long __force)port, buf, count);
 129 }
 130
 131 /* Memory functions, same as I/O accesses on Ultra. */
 132 static inline u8 _readb(const volatile void __iomem *addr)
 133 {       u8 ret;
 134
 135         __asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_readb */"
 136                              : "=r" (ret)
 137                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 138                              : "memory");
 139         return ret;
 140 }
 141
 142 static inline u16 _readw(const volatile void __iomem *addr)
 143 {       u16 ret;
 144
 145         __asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_readw */"
 146                              : "=r" (ret)
 147                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 148                              : "memory");
 149
 150         return ret;
 151 }
 152
 153 static inline u32 _readl(const volatile void __iomem *addr)
 154 {       u32 ret;
 155
 156         __asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_readl */"
 157                              : "=r" (ret)
 158                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 159                              : "memory");
 160
 161         return ret;
 162 }
 163
 164 static inline u64 _readq(const volatile void __iomem *addr)
 165 {       u64 ret;
 166
 167         __asm__ __volatile__("ldxa\t[%1] %2, %0\t/* pci_readq */"
 168                              : "=r" (ret)
 169                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 170                              : "memory");
 171
 172         return ret;
 173 }
 174
 175 static inline void _writeb(u8 b, volatile void __iomem *addr)
 176 {
 177         __asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_writeb */"
 178                              : /* no outputs */
 179                              : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 180                              : "memory");
 181 }
 182
 183 static inline void _writew(u16 w, volatile void __iomem *addr)
 184 {
 185         __asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_writew */"
 186                              : /* no outputs */
 187                              : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 188                              : "memory");
 189 }
 190
 191 static inline void _writel(u32 l, volatile void __iomem *addr)
 192 {
 193         __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_writel */"
 194                              : /* no outputs */
 195                              : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 196                              : "memory");
 197 }
 198
 199 static inline void _writeq(u64 q, volatile void __iomem *addr)
 200 {
 201         __asm__ __volatile__("stxa\t%r0, [%1] %2\t/* pci_writeq */"
 202                              : /* no outputs */
 203                              : "Jr" (q), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
 204                              : "memory");
 205 }
 206
 207 #define readb(__addr)           _readb(__addr)
 208 #define readw(__addr)           _readw(__addr)
 209 #define readl(__addr)           _readl(__addr)
 210 #define readq(__addr)           _readq(__addr)
 211 #define readb_relaxed(__addr)   _readb(__addr)
 212 #define readw_relaxed(__addr)   _readw(__addr)
 213 #define readl_relaxed(__addr)   _readl(__addr)
 214 #define readq_relaxed(__addr)   _readq(__addr)
 215 #define writeb(__b, __addr)     _writeb(__b, __addr)
 216 #define writew(__w, __addr)     _writew(__w, __addr)
 217 #define writel(__l, __addr)     _writel(__l, __addr)
 218 #define writeq(__q, __addr)     _writeq(__q, __addr)
 219
 220 /* Now versions without byte-swapping. */
 221 static inline u8 _raw_readb(unsigned long addr)
 222 {
 223         u8 ret;
 224
 225         __asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_raw_readb */"
 226                              : "=r" (ret)
 227                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 228
 229         return ret;
 230 }
 231
 232 static inline u16 _raw_readw(unsigned long addr)
 233 {
 234         u16 ret;
 235
 236         __asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_raw_readw */"
 237                              : "=r" (ret)
 238                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 239
 240         return ret;
 241 }
 242
 243 static inline u32 _raw_readl(unsigned long addr)
 244 {
 245         u32 ret;
 246
 247         __asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_raw_readl */"
 248                              : "=r" (ret)
 249                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 250
 251         return ret;
 252 }
 253
 254 static inline u64 _raw_readq(unsigned long addr)
 255 {
 256         u64 ret;
 257
 258         __asm__ __volatile__("ldxa\t[%1] %2, %0\t/* pci_raw_readq */"
 259                              : "=r" (ret)
 260                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 261
 262         return ret;
 263 }
 264
 265 static inline void _raw_writeb(u8 b, unsigned long addr)
 266 {
 267         __asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_raw_writeb */"
 268                              : /* no outputs */
 269                              : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 270 }
 271
 272 static inline void _raw_writew(u16 w, unsigned long addr)
 273 {
 274         __asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_raw_writew */"
 275                              : /* no outputs */
 276                              : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 277 }
 278
 279 static inline void _raw_writel(u32 l, unsigned long addr)
 280 {
 281         __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_raw_writel */"
 282                              : /* no outputs */
 283                              : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 284 }
 285
 286 static inline void _raw_writeq(u64 q, unsigned long addr)
 287 {
 288         __asm__ __volatile__("stxa\t%r0, [%1] %2\t/* pci_raw_writeq */"
 289                              : /* no outputs */
 290                              : "Jr" (q), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
 291 }
 292
 293 #define __raw_readb(__addr)             (_raw_readb((unsigned long)(__addr)))
 294 #define __raw_readw(__addr)             (_raw_readw((unsigned long)(__addr)))
 295 #define __raw_readl(__addr)             (_raw_readl((unsigned long)(__addr)))
 296 #define __raw_readq(__addr)             (_raw_readq((unsigned long)(__addr)))
 297 #define __raw_writeb(__b, __addr)       (_raw_writeb((u8)(__b), (unsigned long)(__addr)))
 298 #define __raw_writew(__w, __addr)       (_raw_writew((u16)(__w), (unsigned long)(__addr)))
 299 #define __raw_writel(__l, __addr)       (_raw_writel((u32)(__l), (unsigned long)(__addr)))
 300 #define __raw_writeq(__q, __addr)       (_raw_writeq((u64)(__q), (unsigned long)(__addr)))
 301
 302 /* Valid I/O Space regions are anywhere, because each PCI bus supported
 303  * can live in an arbitrary area of the physical address range.
 304  */
 305 #define IO_SPACE_LIMIT 0xffffffffffffffffUL
 306
 307 /* Now, SBUS variants, only difference from PCI is that we do
 308  * not use little-endian ASIs.
 309  */
 310 static inline u8 _sbus_readb(const volatile void __iomem *addr)
 311 {
 312         u8 ret;
 313
 314         __asm__ __volatile__("lduba\t[%1] %2, %0\t/* sbus_readb */"
 315                              : "=r" (ret)
 316                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 317                              : "memory");
 318
 319         return ret;
 320 }
 321
 322 static inline u16 _sbus_readw(const volatile void __iomem *addr)
 323 {
 324         u16 ret;
 325
 326         __asm__ __volatile__("lduha\t[%1] %2, %0\t/* sbus_readw */"
 327                              : "=r" (ret)
 328                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 329                              : "memory");
 330
 331         return ret;
 332 }
 333
 334 static inline u32 _sbus_readl(const volatile void __iomem *addr)
 335 {
 336         u32 ret;
 337
 338         __asm__ __volatile__("lduwa\t[%1] %2, %0\t/* sbus_readl */"
 339                              : "=r" (ret)
 340                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 341                              : "memory");
 342
 343         return ret;
 344 }
 345
 346 static inline u64 _sbus_readq(const volatile void __iomem *addr)
 347 {
 348         u64 ret;
 349
 350         __asm__ __volatile__("ldxa\t[%1] %2, %0\t/* sbus_readq */"
 351                              : "=r" (ret)
 352                              : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 353                              : "memory");
 354
 355         return ret;
 356 }
 357
 358 static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
 359 {
 360         __asm__ __volatile__("stba\t%r0, [%1] %2\t/* sbus_writeb */"
 361                              : /* no outputs */
 362                              : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 363                              : "memory");
 364 }
 365
 366 static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
 367 {
 368         __asm__ __volatile__("stha\t%r0, [%1] %2\t/* sbus_writew */"
 369                              : /* no outputs */
 370                              : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 371                              : "memory");
 372 }
 373
 374 static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
 375 {
 376         __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* sbus_writel */"
 377                              : /* no outputs */
 378                              : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 379                              : "memory");
 380 }
 381
 382 static inline void _sbus_writeq(u64 l, volatile void __iomem *addr)
 383 {
 384         __asm__ __volatile__("stxa\t%r0, [%1] %2\t/* sbus_writeq */"
 385                              : /* no outputs */
 386                              : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
 387                              : "memory");
 388 }
 389
 390 #define sbus_readb(__addr)              _sbus_readb(__addr)
 391 #define sbus_readw(__addr)              _sbus_readw(__addr)
 392 #define sbus_readl(__addr)              _sbus_readl(__addr)
 393 #define sbus_readq(__addr)              _sbus_readq(__addr)
 394 #define sbus_writeb(__b, __addr)        _sbus_writeb(__b, __addr)
 395 #define sbus_writew(__w, __addr)        _sbus_writew(__w, __addr)
 396 #define sbus_writel(__l, __addr)        _sbus_writel(__l, __addr)
 397 #define sbus_writeq(__l, __addr)        _sbus_writeq(__l, __addr)
 398
 399 static inline void _sbus_memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
 400 {
 401         while(n--) {
 402                 sbus_writeb(c, dst);
 403                 dst++;
 404         }
 405 }
 406
 407 #define sbus_memset_io(d,c,sz)  _sbus_memset_io(d,c,sz)
 408
 409 static inline void
 410 _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
 411 {
 412         volatile void __iomem *d = dst;
 413
 414         while (n--) {
 415                 writeb(c, d);
 416                 d++;
 417         }
 418 }
 419
 420 #define memset_io(d,c,sz)       _memset_io(d,c,sz)
 421
 422 static inline void
 423 _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
 424 {
 425         char *d = dst;
 426
 427         while (n--) {
 428                 char tmp = readb(src);
 429                 *d++ = tmp;
 430                 src++;
 431         }
 432 }
 433
 434 #define memcpy_fromio(d,s,sz)   _memcpy_fromio(d,s,sz)
 435
 436 static inline void
 437 _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
 438 {
 439         const char *s = src;
 440         volatile void __iomem *d = dst;
 441
 442         while (n--) {
 443                 char tmp = *s++;
 444                 writeb(tmp, d);
 445                 d++;
 446         }
 447 }
 448
 449 #define memcpy_toio(d,s,sz)     _memcpy_toio(d,s,sz)
 450
 451 #define mmiowb()
 452
 453 #ifdef __KERNEL__
 454
 455 /* On sparc64 we have the whole physical IO address space accessible
 456  * using physically addressed loads and stores, so this does nothing.
 457  */
 458 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
 459 {
 460         return (void __iomem *)offset;
 461 }
 462
 463 #define ioremap_nocache(X,Y)            ioremap((X),(Y))
 464
 465 static inline void iounmap(volatile void __iomem *addr)
 466 {
 467 }
 468
 469 #define ioread8(X)                      readb(X)
 470 #define ioread16(X)                     readw(X)
 471 #define ioread32(X)                     readl(X)
 472 #define iowrite8(val,X)                 writeb(val,X)
 473 #define iowrite16(val,X)                writew(val,X)
 474 #define iowrite32(val,X)                writel(val,X)
 475
 476 /* Create a virtual mapping cookie for an IO port range */
 477 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
 478 extern void ioport_unmap(void __iomem *);
 479
 480 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
 481 struct pci_dev;
 482 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
 483 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
 484
 485 /* Similarly for SBUS. */
 486 #define sbus_ioremap(__res, __offset, __size, __name) \
 487 ({      unsigned long __ret; \
 488         __ret  = (__res)->start + (((__res)->flags & 0x1ffUL) << 32UL); \
 489         __ret += (unsigned long) (__offset); \
 490         if (! request_region((__ret), (__size), (__name))) \
 491                 __ret = 0UL; \
 492         (void __iomem *) __ret; \
 493 })
 494
 495 #define sbus_iounmap(__addr, __size)    \
 496         release_region((unsigned long)(__addr), (__size))
 497
 498 /*
 499  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 500  * access
 501  */
 502 #define xlate_dev_mem_ptr(p)    __va(p)
 503
 504 /*
 505  * Convert a virtual cached pointer to an uncached pointer
 506  */
 507 #define xlate_dev_kmem_ptr(p)   p
 508
 509 #endif
 510
 511 #endif /* !(__SPARC64_IO_H) */