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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 | /* * iomap.c - Implement iomap interface for PA-RISC * Copyright (c) 2004 Matthew Wilcox */ #include <linux/ioport.h> #include <linux/pci.h> #include <asm/io.h> /* * The iomap space on 32-bit PA-RISC is intended to look like this: * 00000000-7fffffff virtual mapped IO * 80000000-8fffffff ISA/EISA port space that can't be virtually mapped * 90000000-9fffffff Dino port space * a0000000-afffffff Astro port space * b0000000-bfffffff PAT port space * c0000000-cfffffff non-swapped memory IO * f0000000-ffffffff legacy IO memory pointers * * For the moment, here's what it looks like: * 80000000-8fffffff All ISA/EISA port space * f0000000-ffffffff legacy IO memory pointers * * On 64-bit, everything is extended, so: * 8000000000000000-8fffffffffffffff All ISA/EISA port space * f000000000000000-ffffffffffffffff legacy IO memory pointers */ /* * Technically, this should be 'if (VMALLOC_START < addr < VMALLOC_END), * but that's slow and we know it'll be within the first 2GB. */ #ifdef CONFIG_64BIT #define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<63) != 0) #define ADDR_TO_REGION(addr) (((unsigned long)addr >> 60) & 7) #define IOPORT_MAP_BASE (8UL << 60) #else #define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<31) != 0) #define ADDR_TO_REGION(addr) (((unsigned long)addr >> 28) & 7) #define IOPORT_MAP_BASE (8UL << 28) #endif struct iomap_ops { unsigned int (*read8)(void __iomem *); unsigned int (*read16)(void __iomem *); unsigned int (*read16be)(void __iomem *); unsigned int (*read32)(void __iomem *); unsigned int (*read32be)(void __iomem *); void (*write8)(u8, void __iomem *); void (*write16)(u16, void __iomem *); void (*write16be)(u16, void __iomem *); void (*write32)(u32, void __iomem *); void (*write32be)(u32, void __iomem *); void (*read8r)(void __iomem *, void *, unsigned long); void (*read16r)(void __iomem *, void *, unsigned long); void (*read32r)(void __iomem *, void *, unsigned long); void (*write8r)(void __iomem *, const void *, unsigned long); void (*write16r)(void __iomem *, const void *, unsigned long); void (*write32r)(void __iomem *, const void *, unsigned long); }; /* Generic ioport ops. To be replaced later by specific dino/elroy/wax code */ #define ADDR2PORT(addr) ((unsigned long __force)(addr) & 0xffffff) static unsigned int ioport_read8(void __iomem *addr) { return inb(ADDR2PORT(addr)); } static unsigned int ioport_read16(void __iomem *addr) { return inw(ADDR2PORT(addr)); } static unsigned int ioport_read32(void __iomem *addr) { return inl(ADDR2PORT(addr)); } static void ioport_write8(u8 datum, void __iomem *addr) { outb(datum, ADDR2PORT(addr)); } static void ioport_write16(u16 datum, void __iomem *addr) { outw(datum, ADDR2PORT(addr)); } static void ioport_write32(u32 datum, void __iomem *addr) { outl(datum, ADDR2PORT(addr)); } static void ioport_read8r(void __iomem *addr, void *dst, unsigned long count) { insb(ADDR2PORT(addr), dst, count); } static void ioport_read16r(void __iomem *addr, void *dst, unsigned long count) { insw(ADDR2PORT(addr), dst, count); } static void ioport_read32r(void __iomem *addr, void *dst, unsigned long count) { insl(ADDR2PORT(addr), dst, count); } static void ioport_write8r(void __iomem *addr, const void *s, unsigned long n) { outsb(ADDR2PORT(addr), s, n); } static void ioport_write16r(void __iomem *addr, const void *s, unsigned long n) { outsw(ADDR2PORT(addr), s, n); } static void ioport_write32r(void __iomem *addr, const void *s, unsigned long n) { outsl(ADDR2PORT(addr), s, n); } static const struct iomap_ops ioport_ops = { ioport_read8, ioport_read16, ioport_read16, ioport_read32, ioport_read32, ioport_write8, ioport_write16, ioport_write16, ioport_write32, ioport_write32, ioport_read8r, ioport_read16r, ioport_read32r, ioport_write8r, ioport_write16r, ioport_write32r, }; /* Legacy I/O memory ops */ static unsigned int iomem_read8(void __iomem *addr) { return readb(addr); } static unsigned int iomem_read16(void __iomem *addr) { return readw(addr); } static unsigned int iomem_read16be(void __iomem *addr) { return __raw_readw(addr); } static unsigned int iomem_read32(void __iomem *addr) { return readl(addr); } static unsigned int iomem_read32be(void __iomem *addr) { return __raw_readl(addr); } static void iomem_write8(u8 datum, void __iomem *addr) { writeb(datum, addr); } static void iomem_write16(u16 datum, void __iomem *addr) { writew(datum, addr); } static void iomem_write16be(u16 datum, void __iomem *addr) { __raw_writew(datum, addr); } static void iomem_write32(u32 datum, void __iomem *addr) { writel(datum, addr); } static void iomem_write32be(u32 datum, void __iomem *addr) { __raw_writel(datum, addr); } static void iomem_read8r(void __iomem *addr, void *dst, unsigned long count) { while (count--) { *(u8 *)dst = __raw_readb(addr); dst++; } } static void iomem_read16r(void __iomem *addr, void *dst, unsigned long count) { while (count--) { *(u16 *)dst = __raw_readw(addr); dst += 2; } } static void iomem_read32r(void __iomem *addr, void *dst, unsigned long count) { while (count--) { *(u32 *)dst = __raw_readl(addr); dst += 4; } } static void iomem_write8r(void __iomem *addr, const void *s, unsigned long n) { while (n--) { __raw_writeb(*(u8 *)s, addr); s++; } } static void iomem_write16r(void __iomem *addr, const void *s, unsigned long n) { while (n--) { __raw_writew(*(u16 *)s, addr); s += 2; } } static void iomem_write32r(void __iomem *addr, const void *s, unsigned long n) { while (n--) { __raw_writel(*(u32 *)s, addr); s += 4; } } static const struct iomap_ops iomem_ops = { iomem_read8, iomem_read16, iomem_read16be, iomem_read32, iomem_read32be, iomem_write8, iomem_write16, iomem_write16be, iomem_write32, iomem_write32be, iomem_read8r, iomem_read16r, iomem_read32r, iomem_write8r, iomem_write16r, iomem_write32r, }; const struct iomap_ops *iomap_ops[8] = { [0] = &ioport_ops, #ifdef CONFIG_DEBUG_IOREMAP [6] = &iomem_ops, #else [7] = &iomem_ops #endif }; unsigned int ioread8(void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) return iomap_ops[ADDR_TO_REGION(addr)]->read8(addr); return *((u8 *)addr); } unsigned int ioread16(void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) return iomap_ops[ADDR_TO_REGION(addr)]->read16(addr); return le16_to_cpup((u16 *)addr); } unsigned int ioread16be(void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) return iomap_ops[ADDR_TO_REGION(addr)]->read16be(addr); return *((u16 *)addr); } unsigned int ioread32(void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) return iomap_ops[ADDR_TO_REGION(addr)]->read32(addr); return le32_to_cpup((u32 *)addr); } unsigned int ioread32be(void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) return iomap_ops[ADDR_TO_REGION(addr)]->read32be(addr); return *((u32 *)addr); } void iowrite8(u8 datum, void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write8(datum, addr); } else { *((u8 *)addr) = datum; } } void iowrite16(u16 datum, void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write16(datum, addr); } else { *((u16 *)addr) = cpu_to_le16(datum); } } void iowrite16be(u16 datum, void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write16be(datum, addr); } else { *((u16 *)addr) = datum; } } void iowrite32(u32 datum, void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write32(datum, addr); } else { *((u32 *)addr) = cpu_to_le32(datum); } } void iowrite32be(u32 datum, void __iomem *addr) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write32be(datum, addr); } else { *((u32 *)addr) = datum; } } /* Repeating interfaces */ void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->read8r(addr, dst, count); } else { while (count--) { *(u8 *)dst = *(u8 *)addr; dst++; } } } void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->read16r(addr, dst, count); } else { while (count--) { *(u16 *)dst = *(u16 *)addr; dst += 2; } } } void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->read32r(addr, dst, count); } else { while (count--) { *(u32 *)dst = *(u32 *)addr; dst += 4; } } } void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write8r(addr, src, count); } else { while (count--) { *(u8 *)addr = *(u8 *)src; src++; } } } void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write16r(addr, src, count); } else { while (count--) { *(u16 *)addr = *(u16 *)src; src += 2; } } } void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) { if (unlikely(INDIRECT_ADDR(addr))) { iomap_ops[ADDR_TO_REGION(addr)]->write32r(addr, src, count); } else { while (count--) { *(u32 *)addr = *(u32 *)src; src += 4; } } } /* Mapping interfaces */ void __iomem *ioport_map(unsigned long port, unsigned int nr) { return (void __iomem *)(IOPORT_MAP_BASE | port); } void ioport_unmap(void __iomem *addr) { if (!INDIRECT_ADDR(addr)) { iounmap(addr); } } /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { unsigned long start = pci_resource_start(dev, bar); unsigned long len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) return NULL; if (maxlen && len > maxlen) len = maxlen; if (flags & IORESOURCE_IO) return ioport_map(start, len); if (flags & IORESOURCE_MEM) { if (flags & IORESOURCE_CACHEABLE) return ioremap(start, len); return ioremap_nocache(start, len); } /* What? */ return NULL; } void pci_iounmap(struct pci_dev *dev, void __iomem * addr) { if (!INDIRECT_ADDR(addr)) { iounmap(addr); } } EXPORT_SYMBOL(ioread8); EXPORT_SYMBOL(ioread16); EXPORT_SYMBOL(ioread16be); EXPORT_SYMBOL(ioread32); EXPORT_SYMBOL(ioread32be); EXPORT_SYMBOL(iowrite8); EXPORT_SYMBOL(iowrite16); EXPORT_SYMBOL(iowrite16be); EXPORT_SYMBOL(iowrite32); EXPORT_SYMBOL(iowrite32be); EXPORT_SYMBOL(ioread8_rep); EXPORT_SYMBOL(ioread16_rep); EXPORT_SYMBOL(ioread32_rep); EXPORT_SYMBOL(iowrite8_rep); EXPORT_SYMBOL(iowrite16_rep); EXPORT_SYMBOL(iowrite32_rep); EXPORT_SYMBOL(ioport_map); EXPORT_SYMBOL(ioport_unmap); EXPORT_SYMBOL(pci_iomap); EXPORT_SYMBOL(pci_iounmap); |