arch/parisc/lib/iomap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * iomap.c - Implement iomap interface for PA-RISC
   4  * Copyright (c) 2004 Matthew Wilcox
   5  */
   6
   7 #include <linux/ioport.h>
   8 #include <linux/pci.h>
   9 #include <linux/export.h>
  10 #include <asm/io.h>
  11
  12 /*
  13  * The iomap space on 32-bit PA-RISC is intended to look like this:
  14  * 00000000-7fffffff virtual mapped IO
  15  * 80000000-8fffffff ISA/EISA port space that can't be virtually mapped
  16  * 90000000-9fffffff Dino port space
  17  * a0000000-afffffff Astro port space
  18  * b0000000-bfffffff PAT port space
  19  * c0000000-cfffffff non-swapped memory IO
  20  * f0000000-ffffffff legacy IO memory pointers
  21  *
  22  * For the moment, here's what it looks like:
  23  * 80000000-8fffffff All ISA/EISA port space
  24  * f0000000-ffffffff legacy IO memory pointers
  25  *
  26  * On 64-bit, everything is extended, so:
  27  * 8000000000000000-8fffffffffffffff All ISA/EISA port space
  28  * f000000000000000-ffffffffffffffff legacy IO memory pointers
  29  */
  30
  31 /*
  32  * Technically, this should be 'if (VMALLOC_START < addr < VMALLOC_END),
  33  * but that's slow and we know it'll be within the first 2GB.
  34  */
  35 #ifdef CONFIG_64BIT
  36 #define INDIRECT_ADDR(addr)     (((unsigned long)(addr) & 1UL<<63) != 0)
  37 #define ADDR_TO_REGION(addr)    (((unsigned long)addr >> 60) & 7)
  38 #define IOPORT_MAP_BASE         (8UL << 60)
  39 #else
  40 #define INDIRECT_ADDR(addr)     (((unsigned long)(addr) & 1UL<<31) != 0)
  41 #define ADDR_TO_REGION(addr)    (((unsigned long)addr >> 28) & 7)
  42 #define IOPORT_MAP_BASE         (8UL << 28)
  43 #endif
  44
  45 struct iomap_ops {
  46         unsigned int (*read8)(const void __iomem *);
  47         unsigned int (*read16)(const void __iomem *);
  48         unsigned int (*read16be)(const void __iomem *);
  49         unsigned int (*read32)(const void __iomem *);
  50         unsigned int (*read32be)(const void __iomem *);
  51 #ifdef CONFIG_64BIT
  52         u64 (*read64)(const void __iomem *);
  53         u64 (*read64be)(const void __iomem *);
  54 #endif
  55         void (*write8)(u8, void __iomem *);
  56         void (*write16)(u16, void __iomem *);
  57         void (*write16be)(u16, void __iomem *);
  58         void (*write32)(u32, void __iomem *);
  59         void (*write32be)(u32, void __iomem *);
  60 #ifdef CONFIG_64BIT
  61         void (*write64)(u64, void __iomem *);
  62         void (*write64be)(u64, void __iomem *);
  63 #endif
  64         void (*read8r)(const void __iomem *, void *, unsigned long);
  65         void (*read16r)(const void __iomem *, void *, unsigned long);
  66         void (*read32r)(const void __iomem *, void *, unsigned long);
  67         void (*write8r)(void __iomem *, const void *, unsigned long);
  68         void (*write16r)(void __iomem *, const void *, unsigned long);
  69         void (*write32r)(void __iomem *, const void *, unsigned long);
  70 };
  71
  72 /* Generic ioport ops.  To be replaced later by specific dino/elroy/wax code */
  73
  74 #define ADDR2PORT(addr) ((unsigned long __force)(addr) & 0xffffff)
  75
  76 static unsigned int ioport_read8(const void __iomem *addr)
  77 {
  78         return inb(ADDR2PORT(addr));
  79 }
  80
  81 static unsigned int ioport_read16(const void __iomem *addr)
  82 {
  83         return inw(ADDR2PORT(addr));
  84 }
  85
  86 static unsigned int ioport_read32(const void __iomem *addr)
  87 {
  88         return inl(ADDR2PORT(addr));
  89 }
  90
  91 static void ioport_write8(u8 datum, void __iomem *addr)
  92 {
  93         outb(datum, ADDR2PORT(addr));
  94 }
  95
  96 static void ioport_write16(u16 datum, void __iomem *addr)
  97 {
  98         outw(datum, ADDR2PORT(addr));
  99 }
 100
 101 static void ioport_write32(u32 datum, void __iomem *addr)
 102 {
 103         outl(datum, ADDR2PORT(addr));
 104 }
 105
 106 static void ioport_read8r(const void __iomem *addr, void *dst, unsigned long count)
 107 {
 108         insb(ADDR2PORT(addr), dst, count);
 109 }
 110
 111 static void ioport_read16r(const void __iomem *addr, void *dst, unsigned long count)
 112 {
 113         insw(ADDR2PORT(addr), dst, count);
 114 }
 115
 116 static void ioport_read32r(const void __iomem *addr, void *dst, unsigned long count)
 117 {
 118         insl(ADDR2PORT(addr), dst, count);
 119 }
 120
 121 static void ioport_write8r(void __iomem *addr, const void *s, unsigned long n)
 122 {
 123         outsb(ADDR2PORT(addr), s, n);
 124 }
 125
 126 static void ioport_write16r(void __iomem *addr, const void *s, unsigned long n)
 127 {
 128         outsw(ADDR2PORT(addr), s, n);
 129 }
 130
 131 static void ioport_write32r(void __iomem *addr, const void *s, unsigned long n)
 132 {
 133         outsl(ADDR2PORT(addr), s, n);
 134 }
 135
 136 static const struct iomap_ops ioport_ops = {
 137         .read8 = ioport_read8,
 138         .read16 = ioport_read16,
 139         .read16be = ioport_read16,
 140         .read32 = ioport_read32,
 141         .read32be = ioport_read32,
 142         .write8 = ioport_write8,
 143         .write16 = ioport_write16,
 144         .write16be = ioport_write16,
 145         .write32 = ioport_write32,
 146         .write32be = ioport_write32,
 147         .read8r = ioport_read8r,
 148         .read16r = ioport_read16r,
 149         .read32r = ioport_read32r,
 150         .write8r = ioport_write8r,
 151         .write16r = ioport_write16r,
 152         .write32r = ioport_write32r,
 153 };
 154
 155 /* Legacy I/O memory ops */
 156
 157 static unsigned int iomem_read8(const void __iomem *addr)
 158 {
 159         return readb(addr);
 160 }
 161
 162 static unsigned int iomem_read16(const void __iomem *addr)
 163 {
 164         return readw(addr);
 165 }
 166
 167 static unsigned int iomem_read16be(const void __iomem *addr)
 168 {
 169         return __raw_readw(addr);
 170 }
 171
 172 static unsigned int iomem_read32(const void __iomem *addr)
 173 {
 174         return readl(addr);
 175 }
 176
 177 static unsigned int iomem_read32be(const void __iomem *addr)
 178 {
 179         return __raw_readl(addr);
 180 }
 181
 182 #ifdef CONFIG_64BIT
 183 static u64 iomem_read64(const void __iomem *addr)
 184 {
 185         return readq(addr);
 186 }
 187
 188 static u64 iomem_read64be(const void __iomem *addr)
 189 {
 190         return __raw_readq(addr);
 191 }
 192 #endif
 193
 194 static void iomem_write8(u8 datum, void __iomem *addr)
 195 {
 196         writeb(datum, addr);
 197 }
 198
 199 static void iomem_write16(u16 datum, void __iomem *addr)
 200 {
 201         writew(datum, addr);
 202 }
 203
 204 static void iomem_write16be(u16 datum, void __iomem *addr)
 205 {
 206         __raw_writew(datum, addr);
 207 }
 208
 209 static void iomem_write32(u32 datum, void __iomem *addr)
 210 {
 211         writel(datum, addr);
 212 }
 213
 214 static void iomem_write32be(u32 datum, void __iomem *addr)
 215 {
 216         __raw_writel(datum, addr);
 217 }
 218
 219 #ifdef CONFIG_64BIT
 220 static void iomem_write64(u64 datum, void __iomem *addr)
 221 {
 222         writeq(datum, addr);
 223 }
 224
 225 static void iomem_write64be(u64 datum, void __iomem *addr)
 226 {
 227         __raw_writeq(datum, addr);
 228 }
 229 #endif
 230
 231 static void iomem_read8r(const void __iomem *addr, void *dst, unsigned long count)
 232 {
 233         while (count--) {
 234                 *(u8 *)dst = __raw_readb(addr);
 235                 dst++;
 236         }
 237 }
 238
 239 static void iomem_read16r(const void __iomem *addr, void *dst, unsigned long count)
 240 {
 241         while (count--) {
 242                 *(u16 *)dst = __raw_readw(addr);
 243                 dst += 2;
 244         }
 245 }
 246
 247 static void iomem_read32r(const void __iomem *addr, void *dst, unsigned long count)
 248 {
 249         while (count--) {
 250                 *(u32 *)dst = __raw_readl(addr);
 251                 dst += 4;
 252         }
 253 }
 254
 255 static void iomem_write8r(void __iomem *addr, const void *s, unsigned long n)
 256 {
 257         while (n--) {
 258                 __raw_writeb(*(u8 *)s, addr);
 259                 s++;
 260         }
 261 }
 262
 263 static void iomem_write16r(void __iomem *addr, const void *s, unsigned long n)
 264 {
 265         while (n--) {
 266                 __raw_writew(*(u16 *)s, addr);
 267                 s += 2;
 268         }
 269 }
 270
 271 static void iomem_write32r(void __iomem *addr, const void *s, unsigned long n)
 272 {
 273         while (n--) {
 274                 __raw_writel(*(u32 *)s, addr);
 275                 s += 4;
 276         }
 277 }
 278
 279 static const struct iomap_ops iomem_ops = {
 280         .read8 = iomem_read8,
 281         .read16 = iomem_read16,
 282         .read16be = iomem_read16be,
 283         .read32 = iomem_read32,
 284         .read32be = iomem_read32be,
 285 #ifdef CONFIG_64BIT
 286         .read64 = iomem_read64,
 287         .read64be = iomem_read64be,
 288 #endif
 289         .write8 = iomem_write8,
 290         .write16 = iomem_write16,
 291         .write16be = iomem_write16be,
 292         .write32 = iomem_write32,
 293         .write32be = iomem_write32be,
 294 #ifdef CONFIG_64BIT
 295         .write64 = iomem_write64,
 296         .write64be = iomem_write64be,
 297 #endif
 298         .read8r = iomem_read8r,
 299         .read16r = iomem_read16r,
 300         .read32r = iomem_read32r,
 301         .write8r = iomem_write8r,
 302         .write16r = iomem_write16r,
 303         .write32r = iomem_write32r,
 304 };
 305
 306 static const struct iomap_ops *iomap_ops[8] = {
 307         [0] = &ioport_ops,
 308         [7] = &iomem_ops
 309 };
 310
 311
 312 unsigned int ioread8(const void __iomem *addr)
 313 {
 314         if (unlikely(INDIRECT_ADDR(addr)))
 315                 return iomap_ops[ADDR_TO_REGION(addr)]->read8(addr);
 316         return *((u8 *)addr);
 317 }
 318
 319 unsigned int ioread16(const void __iomem *addr)
 320 {
 321         if (unlikely(INDIRECT_ADDR(addr)))
 322                 return iomap_ops[ADDR_TO_REGION(addr)]->read16(addr);
 323         return le16_to_cpup((u16 *)addr);
 324 }
 325
 326 unsigned int ioread16be(const void __iomem *addr)
 327 {
 328         if (unlikely(INDIRECT_ADDR(addr)))
 329                 return iomap_ops[ADDR_TO_REGION(addr)]->read16be(addr);
 330         return *((u16 *)addr);
 331 }
 332
 333 unsigned int ioread32(const void __iomem *addr)
 334 {
 335         if (unlikely(INDIRECT_ADDR(addr)))
 336                 return iomap_ops[ADDR_TO_REGION(addr)]->read32(addr);
 337         return le32_to_cpup((u32 *)addr);
 338 }
 339
 340 unsigned int ioread32be(const void __iomem *addr)
 341 {
 342         if (unlikely(INDIRECT_ADDR(addr)))
 343                 return iomap_ops[ADDR_TO_REGION(addr)]->read32be(addr);
 344         return *((u32 *)addr);
 345 }
 346
 347 #ifdef CONFIG_64BIT
 348 u64 ioread64(const void __iomem *addr)
 349 {
 350         if (unlikely(INDIRECT_ADDR(addr)))
 351                 return iomap_ops[ADDR_TO_REGION(addr)]->read64(addr);
 352         return le64_to_cpup((u64 *)addr);
 353 }
 354
 355 u64 ioread64be(const void __iomem *addr)
 356 {
 357         if (unlikely(INDIRECT_ADDR(addr)))
 358                 return iomap_ops[ADDR_TO_REGION(addr)]->read64be(addr);
 359         return *((u64 *)addr);
 360 }
 361 #endif
 362
 363 void iowrite8(u8 datum, void __iomem *addr)
 364 {
 365         if (unlikely(INDIRECT_ADDR(addr))) {
 366                 iomap_ops[ADDR_TO_REGION(addr)]->write8(datum, addr);
 367         } else {
 368                 *((u8 *)addr) = datum;
 369         }
 370 }
 371
 372 void iowrite16(u16 datum, void __iomem *addr)
 373 {
 374         if (unlikely(INDIRECT_ADDR(addr))) {
 375                 iomap_ops[ADDR_TO_REGION(addr)]->write16(datum, addr);
 376         } else {
 377                 *((u16 *)addr) = cpu_to_le16(datum);
 378         }
 379 }
 380
 381 void iowrite16be(u16 datum, void __iomem *addr)
 382 {
 383         if (unlikely(INDIRECT_ADDR(addr))) {
 384                 iomap_ops[ADDR_TO_REGION(addr)]->write16be(datum, addr);
 385         } else {
 386                 *((u16 *)addr) = datum;
 387         }
 388 }
 389
 390 void iowrite32(u32 datum, void __iomem *addr)
 391 {
 392         if (unlikely(INDIRECT_ADDR(addr))) {
 393                 iomap_ops[ADDR_TO_REGION(addr)]->write32(datum, addr);
 394         } else {
 395                 *((u32 *)addr) = cpu_to_le32(datum);
 396         }
 397 }
 398
 399 void iowrite32be(u32 datum, void __iomem *addr)
 400 {
 401         if (unlikely(INDIRECT_ADDR(addr))) {
 402                 iomap_ops[ADDR_TO_REGION(addr)]->write32be(datum, addr);
 403         } else {
 404                 *((u32 *)addr) = datum;
 405         }
 406 }
 407
 408 #ifdef CONFIG_64BIT
 409 void iowrite64(u64 datum, void __iomem *addr)
 410 {
 411         if (unlikely(INDIRECT_ADDR(addr))) {
 412                 iomap_ops[ADDR_TO_REGION(addr)]->write64(datum, addr);
 413         } else {
 414                 *((u64 *)addr) = cpu_to_le64(datum);
 415         }
 416 }
 417
 418 void iowrite64be(u64 datum, void __iomem *addr)
 419 {
 420         if (unlikely(INDIRECT_ADDR(addr))) {
 421                 iomap_ops[ADDR_TO_REGION(addr)]->write64be(datum, addr);
 422         } else {
 423                 *((u64 *)addr) = datum;
 424         }
 425 }
 426 #endif
 427
 428 /* Repeating interfaces */
 429
 430 void ioread8_rep(const void __iomem *addr, void *dst, unsigned long count)
 431 {
 432         if (unlikely(INDIRECT_ADDR(addr))) {
 433                 iomap_ops[ADDR_TO_REGION(addr)]->read8r(addr, dst, count);
 434         } else {
 435                 while (count--) {
 436                         *(u8 *)dst = *(u8 *)addr;
 437                         dst++;
 438                 }
 439         }
 440 }
 441
 442 void ioread16_rep(const void __iomem *addr, void *dst, unsigned long count)
 443 {
 444         if (unlikely(INDIRECT_ADDR(addr))) {
 445                 iomap_ops[ADDR_TO_REGION(addr)]->read16r(addr, dst, count);
 446         } else {
 447                 while (count--) {
 448                         *(u16 *)dst = *(u16 *)addr;
 449                         dst += 2;
 450                 }
 451         }
 452 }
 453
 454 void ioread32_rep(const void __iomem *addr, void *dst, unsigned long count)
 455 {
 456         if (unlikely(INDIRECT_ADDR(addr))) {
 457                 iomap_ops[ADDR_TO_REGION(addr)]->read32r(addr, dst, count);
 458         } else {
 459                 while (count--) {
 460                         *(u32 *)dst = *(u32 *)addr;
 461                         dst += 4;
 462                 }
 463         }
 464 }
 465
 466 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 467 {
 468         if (unlikely(INDIRECT_ADDR(addr))) {
 469                 iomap_ops[ADDR_TO_REGION(addr)]->write8r(addr, src, count);
 470         } else {
 471                 while (count--) {
 472                         *(u8 *)addr = *(u8 *)src;
 473                         src++;
 474                 }
 475         }
 476 }
 477
 478 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 479 {
 480         if (unlikely(INDIRECT_ADDR(addr))) {
 481                 iomap_ops[ADDR_TO_REGION(addr)]->write16r(addr, src, count);
 482         } else {
 483                 while (count--) {
 484                         *(u16 *)addr = *(u16 *)src;
 485                         src += 2;
 486                 }
 487         }
 488 }
 489
 490 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 491 {
 492         if (unlikely(INDIRECT_ADDR(addr))) {
 493                 iomap_ops[ADDR_TO_REGION(addr)]->write32r(addr, src, count);
 494         } else {
 495                 while (count--) {
 496                         *(u32 *)addr = *(u32 *)src;
 497                         src += 4;
 498                 }
 499         }
 500 }
 501
 502 /* Mapping interfaces */
 503
 504 void __iomem *ioport_map(unsigned long port, unsigned int nr)
 505 {
 506         return (void __iomem *)(IOPORT_MAP_BASE | port);
 507 }
 508
 509 void ioport_unmap(void __iomem *addr)
 510 {
 511         if (!INDIRECT_ADDR(addr)) {
 512                 iounmap(addr);
 513         }
 514 }
 515
 516 #ifdef CONFIG_PCI
 517 void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
 518 {
 519         if (!INDIRECT_ADDR(addr)) {
 520                 iounmap(addr);
 521         }
 522 }
 523 EXPORT_SYMBOL(pci_iounmap);
 524 #endif
 525
 526 EXPORT_SYMBOL(ioread8);
 527 EXPORT_SYMBOL(ioread16);
 528 EXPORT_SYMBOL(ioread16be);
 529 EXPORT_SYMBOL(ioread32);
 530 EXPORT_SYMBOL(ioread32be);
 531 #ifdef CONFIG_64BIT
 532 EXPORT_SYMBOL(ioread64);
 533 EXPORT_SYMBOL(ioread64be);
 534 #endif
 535 EXPORT_SYMBOL(iowrite8);
 536 EXPORT_SYMBOL(iowrite16);
 537 EXPORT_SYMBOL(iowrite16be);
 538 EXPORT_SYMBOL(iowrite32);
 539 EXPORT_SYMBOL(iowrite32be);
 540 #ifdef CONFIG_64BIT
 541 EXPORT_SYMBOL(iowrite64);
 542 EXPORT_SYMBOL(iowrite64be);
 543 #endif
 544 EXPORT_SYMBOL(ioread8_rep);
 545 EXPORT_SYMBOL(ioread16_rep);
 546 EXPORT_SYMBOL(ioread32_rep);
 547 EXPORT_SYMBOL(iowrite8_rep);
 548 EXPORT_SYMBOL(iowrite16_rep);
 549 EXPORT_SYMBOL(iowrite32_rep);
 550 EXPORT_SYMBOL(ioport_map);
 551 EXPORT_SYMBOL(ioport_unmap);