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         u64 (*read64)(const void __iomem *);
  52         u64 (*read64be)(const void __iomem *);
  53         void (*write8)(u8, void __iomem *);
  54         void (*write16)(u16, void __iomem *);
  55         void (*write16be)(u16, void __iomem *);
  56         void (*write32)(u32, void __iomem *);
  57         void (*write32be)(u32, void __iomem *);
  58         void (*write64)(u64, void __iomem *);
  59         void (*write64be)(u64, void __iomem *);
  60         void (*read8r)(const void __iomem *, void *, unsigned long);
  61         void (*read16r)(const void __iomem *, void *, unsigned long);
  62         void (*read32r)(const void __iomem *, void *, unsigned long);
  63         void (*write8r)(void __iomem *, const void *, unsigned long);
  64         void (*write16r)(void __iomem *, const void *, unsigned long);
  65         void (*write32r)(void __iomem *, const void *, unsigned long);
  66 };
  67
  68 /* Generic ioport ops.  To be replaced later by specific dino/elroy/wax code */
  69
  70 #define ADDR2PORT(addr) ((unsigned long __force)(addr) & 0xffffff)
  71
  72 static unsigned int ioport_read8(const void __iomem *addr)
  73 {
  74         return inb(ADDR2PORT(addr));
  75 }
  76
  77 static unsigned int ioport_read16(const void __iomem *addr)
  78 {
  79         return inw(ADDR2PORT(addr));
  80 }
  81
  82 static unsigned int ioport_read32(const void __iomem *addr)
  83 {
  84         return inl(ADDR2PORT(addr));
  85 }
  86
  87 static void ioport_write8(u8 datum, void __iomem *addr)
  88 {
  89         outb(datum, ADDR2PORT(addr));
  90 }
  91
  92 static void ioport_write16(u16 datum, void __iomem *addr)
  93 {
  94         outw(datum, ADDR2PORT(addr));
  95 }
  96
  97 static void ioport_write32(u32 datum, void __iomem *addr)
  98 {
  99         outl(datum, ADDR2PORT(addr));
 100 }
 101
 102 static void ioport_read8r(const void __iomem *addr, void *dst, unsigned long count)
 103 {
 104         insb(ADDR2PORT(addr), dst, count);
 105 }
 106
 107 static void ioport_read16r(const void __iomem *addr, void *dst, unsigned long count)
 108 {
 109         insw(ADDR2PORT(addr), dst, count);
 110 }
 111
 112 static void ioport_read32r(const void __iomem *addr, void *dst, unsigned long count)
 113 {
 114         insl(ADDR2PORT(addr), dst, count);
 115 }
 116
 117 static void ioport_write8r(void __iomem *addr, const void *s, unsigned long n)
 118 {
 119         outsb(ADDR2PORT(addr), s, n);
 120 }
 121
 122 static void ioport_write16r(void __iomem *addr, const void *s, unsigned long n)
 123 {
 124         outsw(ADDR2PORT(addr), s, n);
 125 }
 126
 127 static void ioport_write32r(void __iomem *addr, const void *s, unsigned long n)
 128 {
 129         outsl(ADDR2PORT(addr), s, n);
 130 }
 131
 132 static const struct iomap_ops ioport_ops = {
 133         .read8 = ioport_read8,
 134         .read16 = ioport_read16,
 135         .read16be = ioport_read16,
 136         .read32 = ioport_read32,
 137         .read32be = ioport_read32,
 138         .write8 = ioport_write8,
 139         .write16 = ioport_write16,
 140         .write16be = ioport_write16,
 141         .write32 = ioport_write32,
 142         .write32be = ioport_write32,
 143         .read8r = ioport_read8r,
 144         .read16r = ioport_read16r,
 145         .read32r = ioport_read32r,
 146         .write8r = ioport_write8r,
 147         .write16r = ioport_write16r,
 148         .write32r = ioport_write32r,
 149 };
 150
 151 /* Legacy I/O memory ops */
 152
 153 static unsigned int iomem_read8(const void __iomem *addr)
 154 {
 155         return readb(addr);
 156 }
 157
 158 static unsigned int iomem_read16(const void __iomem *addr)
 159 {
 160         return readw(addr);
 161 }
 162
 163 static unsigned int iomem_read16be(const void __iomem *addr)
 164 {
 165         return __raw_readw(addr);
 166 }
 167
 168 static unsigned int iomem_read32(const void __iomem *addr)
 169 {
 170         return readl(addr);
 171 }
 172
 173 static unsigned int iomem_read32be(const void __iomem *addr)
 174 {
 175         return __raw_readl(addr);
 176 }
 177
 178 static u64 iomem_read64(const void __iomem *addr)
 179 {
 180         return readq(addr);
 181 }
 182
 183 static u64 iomem_read64be(const void __iomem *addr)
 184 {
 185         return __raw_readq(addr);
 186 }
 187
 188 static void iomem_write8(u8 datum, void __iomem *addr)
 189 {
 190         writeb(datum, addr);
 191 }
 192
 193 static void iomem_write16(u16 datum, void __iomem *addr)
 194 {
 195         writew(datum, addr);
 196 }
 197
 198 static void iomem_write16be(u16 datum, void __iomem *addr)
 199 {
 200         __raw_writew(datum, addr);
 201 }
 202
 203 static void iomem_write32(u32 datum, void __iomem *addr)
 204 {
 205         writel(datum, addr);
 206 }
 207
 208 static void iomem_write32be(u32 datum, void __iomem *addr)
 209 {
 210         __raw_writel(datum, addr);
 211 }
 212
 213 static void iomem_write64(u64 datum, void __iomem *addr)
 214 {
 215         writel(datum, addr);
 216 }
 217
 218 static void iomem_write64be(u64 datum, void __iomem *addr)
 219 {
 220         __raw_writel(datum, addr);
 221 }
 222
 223 static void iomem_read8r(const void __iomem *addr, void *dst, unsigned long count)
 224 {
 225         while (count--) {
 226                 *(u8 *)dst = __raw_readb(addr);
 227                 dst++;
 228         }
 229 }
 230
 231 static void iomem_read16r(const void __iomem *addr, void *dst, unsigned long count)
 232 {
 233         while (count--) {
 234                 *(u16 *)dst = __raw_readw(addr);
 235                 dst += 2;
 236         }
 237 }
 238
 239 static void iomem_read32r(const void __iomem *addr, void *dst, unsigned long count)
 240 {
 241         while (count--) {
 242                 *(u32 *)dst = __raw_readl(addr);
 243                 dst += 4;
 244         }
 245 }
 246
 247 static void iomem_write8r(void __iomem *addr, const void *s, unsigned long n)
 248 {
 249         while (n--) {
 250                 __raw_writeb(*(u8 *)s, addr);
 251                 s++;
 252         }
 253 }
 254
 255 static void iomem_write16r(void __iomem *addr, const void *s, unsigned long n)
 256 {
 257         while (n--) {
 258                 __raw_writew(*(u16 *)s, addr);
 259                 s += 2;
 260         }
 261 }
 262
 263 static void iomem_write32r(void __iomem *addr, const void *s, unsigned long n)
 264 {
 265         while (n--) {
 266                 __raw_writel(*(u32 *)s, addr);
 267                 s += 4;
 268         }
 269 }
 270
 271 static const struct iomap_ops iomem_ops = {
 272         .read8 = iomem_read8,
 273         .read16 = iomem_read16,
 274         .read16be = iomem_read16be,
 275         .read32 = iomem_read32,
 276         .read32be = iomem_read32be,
 277         .read64 = iomem_read64,
 278         .read64be = iomem_read64be,
 279         .write8 = iomem_write8,
 280         .write16 = iomem_write16,
 281         .write16be = iomem_write16be,
 282         .write32 = iomem_write32,
 283         .write32be = iomem_write32be,
 284         .write64 = iomem_write64,
 285         .write64be = iomem_write64be,
 286         .read8r = iomem_read8r,
 287         .read16r = iomem_read16r,
 288         .read32r = iomem_read32r,
 289         .write8r = iomem_write8r,
 290         .write16r = iomem_write16r,
 291         .write32r = iomem_write32r,
 292 };
 293
 294 static const struct iomap_ops *iomap_ops[8] = {
 295         [0] = &ioport_ops,
 296         [7] = &iomem_ops
 297 };
 298
 299
 300 unsigned int ioread8(const void __iomem *addr)
 301 {
 302         if (unlikely(INDIRECT_ADDR(addr)))
 303                 return iomap_ops[ADDR_TO_REGION(addr)]->read8(addr);
 304         return *((u8 *)addr);
 305 }
 306
 307 unsigned int ioread16(const void __iomem *addr)
 308 {
 309         if (unlikely(INDIRECT_ADDR(addr)))
 310                 return iomap_ops[ADDR_TO_REGION(addr)]->read16(addr);
 311         return le16_to_cpup((u16 *)addr);
 312 }
 313
 314 unsigned int ioread16be(const void __iomem *addr)
 315 {
 316         if (unlikely(INDIRECT_ADDR(addr)))
 317                 return iomap_ops[ADDR_TO_REGION(addr)]->read16be(addr);
 318         return *((u16 *)addr);
 319 }
 320
 321 unsigned int ioread32(const void __iomem *addr)
 322 {
 323         if (unlikely(INDIRECT_ADDR(addr)))
 324                 return iomap_ops[ADDR_TO_REGION(addr)]->read32(addr);
 325         return le32_to_cpup((u32 *)addr);
 326 }
 327
 328 unsigned int ioread32be(const void __iomem *addr)
 329 {
 330         if (unlikely(INDIRECT_ADDR(addr)))
 331                 return iomap_ops[ADDR_TO_REGION(addr)]->read32be(addr);
 332         return *((u32 *)addr);
 333 }
 334
 335 u64 ioread64(const void __iomem *addr)
 336 {
 337         if (unlikely(INDIRECT_ADDR(addr)))
 338                 return iomap_ops[ADDR_TO_REGION(addr)]->read64(addr);
 339         return le64_to_cpup((u64 *)addr);
 340 }
 341
 342 u64 ioread64be(const void __iomem *addr)
 343 {
 344         if (unlikely(INDIRECT_ADDR(addr)))
 345                 return iomap_ops[ADDR_TO_REGION(addr)]->read64be(addr);
 346         return *((u64 *)addr);
 347 }
 348
 349 u64 ioread64_hi_lo(const void __iomem *addr)
 350 {
 351         u32 low, high;
 352
 353         high = ioread32(addr + sizeof(u32));
 354         low = ioread32(addr);
 355
 356         return low + ((u64)high << 32);
 357 }
 358
 359 void iowrite8(u8 datum, void __iomem *addr)
 360 {
 361         if (unlikely(INDIRECT_ADDR(addr))) {
 362                 iomap_ops[ADDR_TO_REGION(addr)]->write8(datum, addr);
 363         } else {
 364                 *((u8 *)addr) = datum;
 365         }
 366 }
 367
 368 void iowrite16(u16 datum, void __iomem *addr)
 369 {
 370         if (unlikely(INDIRECT_ADDR(addr))) {
 371                 iomap_ops[ADDR_TO_REGION(addr)]->write16(datum, addr);
 372         } else {
 373                 *((u16 *)addr) = cpu_to_le16(datum);
 374         }
 375 }
 376
 377 void iowrite16be(u16 datum, void __iomem *addr)
 378 {
 379         if (unlikely(INDIRECT_ADDR(addr))) {
 380                 iomap_ops[ADDR_TO_REGION(addr)]->write16be(datum, addr);
 381         } else {
 382                 *((u16 *)addr) = datum;
 383         }
 384 }
 385
 386 void iowrite32(u32 datum, void __iomem *addr)
 387 {
 388         if (unlikely(INDIRECT_ADDR(addr))) {
 389                 iomap_ops[ADDR_TO_REGION(addr)]->write32(datum, addr);
 390         } else {
 391                 *((u32 *)addr) = cpu_to_le32(datum);
 392         }
 393 }
 394
 395 void iowrite32be(u32 datum, void __iomem *addr)
 396 {
 397         if (unlikely(INDIRECT_ADDR(addr))) {
 398                 iomap_ops[ADDR_TO_REGION(addr)]->write32be(datum, addr);
 399         } else {
 400                 *((u32 *)addr) = datum;
 401         }
 402 }
 403
 404 void iowrite64(u64 datum, void __iomem *addr)
 405 {
 406         if (unlikely(INDIRECT_ADDR(addr))) {
 407                 iomap_ops[ADDR_TO_REGION(addr)]->write64(datum, addr);
 408         } else {
 409                 *((u64 *)addr) = cpu_to_le64(datum);
 410         }
 411 }
 412
 413 void iowrite64be(u64 datum, void __iomem *addr)
 414 {
 415         if (unlikely(INDIRECT_ADDR(addr))) {
 416                 iomap_ops[ADDR_TO_REGION(addr)]->write64be(datum, addr);
 417         } else {
 418                 *((u64 *)addr) = datum;
 419         }
 420 }
 421
 422 void iowrite64_hi_lo(u64 val, void __iomem *addr)
 423 {
 424         iowrite32(val >> 32, addr + sizeof(u32));
 425         iowrite32(val, addr);
 426 }
 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 EXPORT_SYMBOL(ioread64);
 532 EXPORT_SYMBOL(ioread64be);
 533 EXPORT_SYMBOL(ioread64_hi_lo);
 534 EXPORT_SYMBOL(iowrite8);
 535 EXPORT_SYMBOL(iowrite16);
 536 EXPORT_SYMBOL(iowrite16be);
 537 EXPORT_SYMBOL(iowrite32);
 538 EXPORT_SYMBOL(iowrite32be);
 539 EXPORT_SYMBOL(iowrite64);
 540 EXPORT_SYMBOL(iowrite64be);
 541 EXPORT_SYMBOL(iowrite64_hi_lo);
 542 EXPORT_SYMBOL(ioread8_rep);
 543 EXPORT_SYMBOL(ioread16_rep);
 544 EXPORT_SYMBOL(ioread32_rep);
 545 EXPORT_SYMBOL(iowrite8_rep);
 546 EXPORT_SYMBOL(iowrite16_rep);
 547 EXPORT_SYMBOL(iowrite32_rep);
 548 EXPORT_SYMBOL(ioport_map);
 549 EXPORT_SYMBOL(ioport_unmap);