1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _ASM_POWERPC_IO_H 3 #define _ASM_POWERPC_IO_H 4 #ifdef __KERNEL__ 5 6 #define ARCH_HAS_IOREMAP_WC 7 #ifdef CONFIG_PPC32 8 #define ARCH_HAS_IOREMAP_WT 9 #endif 10 11 /* 12 */ 13 14 /* Check of existence of legacy devices */ 15 extern int check_legacy_ioport(unsigned long base_port); 16 #define I8042_DATA_REG 0x60 17 #define FDC_BASE 0x3f0 18 19 #if defined(CONFIG_PPC64) && defined(CONFIG_PCI) 20 extern struct pci_dev *isa_bridge_pcidev; 21 /* 22 * has legacy ISA devices ? 23 */ 24 #define arch_has_dev_port() (isa_bridge_pcidev != NULL || isa_io_special) 25 #endif 26 27 #include <linux/device.h> 28 #include <linux/compiler.h> 29 #include <linux/mm.h> 30 #include <asm/page.h> 31 #include <asm/byteorder.h> 32 #include <asm/synch.h> 33 #include <asm/delay.h> 34 #include <asm/mmiowb.h> 35 #include <asm/mmu.h> 36 #include <asm/ppc_asm.h> 37 #include <asm/pgtable.h> 38 39 #define SIO_CONFIG_RA 0x398 40 #define SIO_CONFIG_RD 0x399 41 42 #define SLOW_DOWN_IO 43 44 /* 32 bits uses slightly different variables for the various IO 45 * bases. Most of this file only uses _IO_BASE though which we 46 * define properly based on the platform 47 */ 48 #ifndef CONFIG_PCI 49 #define _IO_BASE 0 50 #define _ISA_MEM_BASE 0 51 #define PCI_DRAM_OFFSET 0 52 #elif defined(CONFIG_PPC32) 53 #define _IO_BASE isa_io_base 54 #define _ISA_MEM_BASE isa_mem_base 55 #define PCI_DRAM_OFFSET pci_dram_offset 56 #else 57 #define _IO_BASE pci_io_base 58 #define _ISA_MEM_BASE isa_mem_base 59 #define PCI_DRAM_OFFSET 0 60 #endif 61 62 extern unsigned long isa_io_base; 63 extern unsigned long pci_io_base; 64 extern unsigned long pci_dram_offset; 65 66 extern resource_size_t isa_mem_base; 67 68 /* Boolean set by platform if PIO accesses are suppored while _IO_BASE 69 * is not set or addresses cannot be translated to MMIO. This is typically 70 * set when the platform supports "special" PIO accesses via a non memory 71 * mapped mechanism, and allows things like the early udbg UART code to 72 * function. 73 */ 74 extern bool isa_io_special; 75 76 #ifdef CONFIG_PPC32 77 #if defined(CONFIG_PPC_INDIRECT_PIO) || defined(CONFIG_PPC_INDIRECT_MMIO) 78 #error CONFIG_PPC_INDIRECT_{PIO,MMIO} are not yet supported on 32 bits 79 #endif 80 #endif 81 82 /* 83 * 84 * Low level MMIO accessors 85 * 86 * This provides the non-bus specific accessors to MMIO. Those are PowerPC 87 * specific and thus shouldn't be used in generic code. The accessors 88 * provided here are: 89 * 90 * in_8, in_le16, in_be16, in_le32, in_be32, in_le64, in_be64 91 * out_8, out_le16, out_be16, out_le32, out_be32, out_le64, out_be64 92 * _insb, _insw_ns, _insl_ns, _outsb, _outsw_ns, _outsl_ns 93 * 94 * Those operate directly on a kernel virtual address. Note that the prototype 95 * for the out_* accessors has the arguments in opposite order from the usual 96 * linux PCI accessors. Unlike those, they take the address first and the value 97 * next. 98 * 99 * Note: I might drop the _ns suffix on the stream operations soon as it is 100 * simply normal for stream operations to not swap in the first place. 101 * 102 */ 103 104 #define DEF_MMIO_IN_X(name, size, insn) \ 105 static inline u##size name(const volatile u##size __iomem *addr) \ 106 { \ 107 u##size ret; \ 108 __asm__ __volatile__("sync;"#insn" %0,%y1;twi 0,%0,0;isync" \ 109 : "=r" (ret) : "Z" (*addr) : "memory"); \ 110 return ret; \ 111 } 112 113 #define DEF_MMIO_OUT_X(name, size, insn) \ 114 static inline void name(volatile u##size __iomem *addr, u##size val) \ 115 { \ 116 __asm__ __volatile__("sync;"#insn" %1,%y0" \ 117 : "=Z" (*addr) : "r" (val) : "memory"); \ 118 mmiowb_set_pending(); \ 119 } 120 121 #define DEF_MMIO_IN_D(name, size, insn) \ 122 static inline u##size name(const volatile u##size __iomem *addr) \ 123 { \ 124 u##size ret; \ 125 __asm__ __volatile__("sync;"#insn"%U1%X1 %0,%1;twi 0,%0,0;isync"\ 126 : "=r" (ret) : "m" (*addr) : "memory"); \ 127 return ret; \ 128 } 129 130 #define DEF_MMIO_OUT_D(name, size, insn) \ 131 static inline void name(volatile u##size __iomem *addr, u##size val) \ 132 { \ 133 __asm__ __volatile__("sync;"#insn"%U0%X0 %1,%0" \ 134 : "=m" (*addr) : "r" (val) : "memory"); \ 135 mmiowb_set_pending(); \ 136 } 137 138 DEF_MMIO_IN_D(in_8, 8, lbz); 139 DEF_MMIO_OUT_D(out_8, 8, stb); 140 141 #ifdef __BIG_ENDIAN__ 142 DEF_MMIO_IN_D(in_be16, 16, lhz); 143 DEF_MMIO_IN_D(in_be32, 32, lwz); 144 DEF_MMIO_IN_X(in_le16, 16, lhbrx); 145 DEF_MMIO_IN_X(in_le32, 32, lwbrx); 146 147 DEF_MMIO_OUT_D(out_be16, 16, sth); 148 DEF_MMIO_OUT_D(out_be32, 32, stw); 149 DEF_MMIO_OUT_X(out_le16, 16, sthbrx); 150 DEF_MMIO_OUT_X(out_le32, 32, stwbrx); 151 #else 152 DEF_MMIO_IN_X(in_be16, 16, lhbrx); 153 DEF_MMIO_IN_X(in_be32, 32, lwbrx); 154 DEF_MMIO_IN_D(in_le16, 16, lhz); 155 DEF_MMIO_IN_D(in_le32, 32, lwz); 156 157 DEF_MMIO_OUT_X(out_be16, 16, sthbrx); 158 DEF_MMIO_OUT_X(out_be32, 32, stwbrx); 159 DEF_MMIO_OUT_D(out_le16, 16, sth); 160 DEF_MMIO_OUT_D(out_le32, 32, stw); 161 162 #endif /* __BIG_ENDIAN */ 163 164 #ifdef __powerpc64__ 165 166 #ifdef __BIG_ENDIAN__ 167 DEF_MMIO_OUT_D(out_be64, 64, std); 168 DEF_MMIO_IN_D(in_be64, 64, ld); 169 170 /* There is no asm instructions for 64 bits reverse loads and stores */ 171 static inline u64 in_le64(const volatile u64 __iomem *addr) 172 { 173 return swab64(in_be64(addr)); 174 } 175 176 static inline void out_le64(volatile u64 __iomem *addr, u64 val) 177 { 178 out_be64(addr, swab64(val)); 179 } 180 #else 181 DEF_MMIO_OUT_D(out_le64, 64, std); 182 DEF_MMIO_IN_D(in_le64, 64, ld); 183 184 /* There is no asm instructions for 64 bits reverse loads and stores */ 185 static inline u64 in_be64(const volatile u64 __iomem *addr) 186 { 187 return swab64(in_le64(addr)); 188 } 189 190 static inline void out_be64(volatile u64 __iomem *addr, u64 val) 191 { 192 out_le64(addr, swab64(val)); 193 } 194 195 #endif 196 #endif /* __powerpc64__ */ 197 198 /* 199 * Low level IO stream instructions are defined out of line for now 200 */ 201 extern void _insb(const volatile u8 __iomem *addr, void *buf, long count); 202 extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count); 203 extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count); 204 extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count); 205 extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count); 206 extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count); 207 208 /* The _ns naming is historical and will be removed. For now, just #define 209 * the non _ns equivalent names 210 */ 211 #define _insw _insw_ns 212 #define _insl _insl_ns 213 #define _outsw _outsw_ns 214 #define _outsl _outsl_ns 215 216 217 /* 218 * memset_io, memcpy_toio, memcpy_fromio base implementations are out of line 219 */ 220 221 extern void _memset_io(volatile void __iomem *addr, int c, unsigned long n); 222 extern void _memcpy_fromio(void *dest, const volatile void __iomem *src, 223 unsigned long n); 224 extern void _memcpy_toio(volatile void __iomem *dest, const void *src, 225 unsigned long n); 226 227 /* 228 * 229 * PCI and standard ISA accessors 230 * 231 * Those are globally defined linux accessors for devices on PCI or ISA 232 * busses. They follow the Linux defined semantics. The current implementation 233 * for PowerPC is as close as possible to the x86 version of these, and thus 234 * provides fairly heavy weight barriers for the non-raw versions 235 * 236 * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_MMIO 237 * or CONFIG_PPC_INDIRECT_PIO are set allowing the platform to provide its 238 * own implementation of some or all of the accessors. 239 */ 240 241 /* 242 * Include the EEH definitions when EEH is enabled only so they don't get 243 * in the way when building for 32 bits 244 */ 245 #ifdef CONFIG_EEH 246 #include <asm/eeh.h> 247 #endif 248 249 /* Shortcut to the MMIO argument pointer */ 250 #define PCI_IO_ADDR volatile void __iomem * 251 252 /* Indirect IO address tokens: 253 * 254 * When CONFIG_PPC_INDIRECT_MMIO is set, the platform can provide hooks 255 * on all MMIOs. (Note that this is all 64 bits only for now) 256 * 257 * To help platforms who may need to differentiate MMIO addresses in 258 * their hooks, a bitfield is reserved for use by the platform near the 259 * top of MMIO addresses (not PIO, those have to cope the hard way). 260 * 261 * The highest address in the kernel virtual space are: 262 * 263 * d0003fffffffffff # with Hash MMU 264 * c00fffffffffffff # with Radix MMU 265 * 266 * The top 4 bits are reserved as the region ID on hash, leaving us 8 bits 267 * that can be used for the field. 268 * 269 * The direct IO mapping operations will then mask off those bits 270 * before doing the actual access, though that only happen when 271 * CONFIG_PPC_INDIRECT_MMIO is set, thus be careful when you use that 272 * mechanism 273 * 274 * For PIO, there is a separate CONFIG_PPC_INDIRECT_PIO which makes 275 * all PIO functions call through a hook. 276 */ 277 278 #ifdef CONFIG_PPC_INDIRECT_MMIO 279 #define PCI_IO_IND_TOKEN_SHIFT 52 280 #define PCI_IO_IND_TOKEN_MASK (0xfful << PCI_IO_IND_TOKEN_SHIFT) 281 #define PCI_FIX_ADDR(addr) \ 282 ((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK)) 283 #define PCI_GET_ADDR_TOKEN(addr) \ 284 (((unsigned long)(addr) & PCI_IO_IND_TOKEN_MASK) >> \ 285 PCI_IO_IND_TOKEN_SHIFT) 286 #define PCI_SET_ADDR_TOKEN(addr, token) \ 287 do { \ 288 unsigned long __a = (unsigned long)(addr); \ 289 __a &= ~PCI_IO_IND_TOKEN_MASK; \ 290 __a |= ((unsigned long)(token)) << PCI_IO_IND_TOKEN_SHIFT; \ 291 (addr) = (void __iomem *)__a; \ 292 } while(0) 293 #else 294 #define PCI_FIX_ADDR(addr) (addr) 295 #endif 296 297 298 /* 299 * Non ordered and non-swapping "raw" accessors 300 */ 301 302 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 303 { 304 return *(volatile unsigned char __force *)PCI_FIX_ADDR(addr); 305 } 306 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 307 { 308 return *(volatile unsigned short __force *)PCI_FIX_ADDR(addr); 309 } 310 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 311 { 312 return *(volatile unsigned int __force *)PCI_FIX_ADDR(addr); 313 } 314 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 315 { 316 *(volatile unsigned char __force *)PCI_FIX_ADDR(addr) = v; 317 } 318 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 319 { 320 *(volatile unsigned short __force *)PCI_FIX_ADDR(addr) = v; 321 } 322 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 323 { 324 *(volatile unsigned int __force *)PCI_FIX_ADDR(addr) = v; 325 } 326 327 #ifdef __powerpc64__ 328 static inline unsigned long __raw_readq(const volatile void __iomem *addr) 329 { 330 return *(volatile unsigned long __force *)PCI_FIX_ADDR(addr); 331 } 332 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) 333 { 334 *(volatile unsigned long __force *)PCI_FIX_ADDR(addr) = v; 335 } 336 337 static inline void __raw_writeq_be(unsigned long v, volatile void __iomem *addr) 338 { 339 __raw_writeq((__force unsigned long)cpu_to_be64(v), addr); 340 } 341 342 /* 343 * Real mode versions of the above. Those instructions are only supposed 344 * to be used in hypervisor real mode as per the architecture spec. 345 */ 346 static inline void __raw_rm_writeb(u8 val, volatile void __iomem *paddr) 347 { 348 __asm__ __volatile__("stbcix %0,0,%1" 349 : : "r" (val), "r" (paddr) : "memory"); 350 } 351 352 static inline void __raw_rm_writew(u16 val, volatile void __iomem *paddr) 353 { 354 __asm__ __volatile__("sthcix %0,0,%1" 355 : : "r" (val), "r" (paddr) : "memory"); 356 } 357 358 static inline void __raw_rm_writel(u32 val, volatile void __iomem *paddr) 359 { 360 __asm__ __volatile__("stwcix %0,0,%1" 361 : : "r" (val), "r" (paddr) : "memory"); 362 } 363 364 static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr) 365 { 366 __asm__ __volatile__("stdcix %0,0,%1" 367 : : "r" (val), "r" (paddr) : "memory"); 368 } 369 370 static inline void __raw_rm_writeq_be(u64 val, volatile void __iomem *paddr) 371 { 372 __raw_rm_writeq((__force u64)cpu_to_be64(val), paddr); 373 } 374 375 static inline u8 __raw_rm_readb(volatile void __iomem *paddr) 376 { 377 u8 ret; 378 __asm__ __volatile__("lbzcix %0,0, %1" 379 : "=r" (ret) : "r" (paddr) : "memory"); 380 return ret; 381 } 382 383 static inline u16 __raw_rm_readw(volatile void __iomem *paddr) 384 { 385 u16 ret; 386 __asm__ __volatile__("lhzcix %0,0, %1" 387 : "=r" (ret) : "r" (paddr) : "memory"); 388 return ret; 389 } 390 391 static inline u32 __raw_rm_readl(volatile void __iomem *paddr) 392 { 393 u32 ret; 394 __asm__ __volatile__("lwzcix %0,0, %1" 395 : "=r" (ret) : "r" (paddr) : "memory"); 396 return ret; 397 } 398 399 static inline u64 __raw_rm_readq(volatile void __iomem *paddr) 400 { 401 u64 ret; 402 __asm__ __volatile__("ldcix %0,0, %1" 403 : "=r" (ret) : "r" (paddr) : "memory"); 404 return ret; 405 } 406 #endif /* __powerpc64__ */ 407 408 /* 409 * 410 * PCI PIO and MMIO accessors. 411 * 412 * 413 * On 32 bits, PIO operations have a recovery mechanism in case they trigger 414 * machine checks (which they occasionally do when probing non existing 415 * IO ports on some platforms, like PowerMac and 8xx). 416 * I always found it to be of dubious reliability and I am tempted to get 417 * rid of it one of these days. So if you think it's important to keep it, 418 * please voice up asap. We never had it for 64 bits and I do not intend 419 * to port it over 420 */ 421 422 #ifdef CONFIG_PPC32 423 424 #define __do_in_asm(name, op) \ 425 static inline unsigned int name(unsigned int port) \ 426 { \ 427 unsigned int x; \ 428 __asm__ __volatile__( \ 429 "sync\n" \ 430 "0:" op " %0,0,%1\n" \ 431 "1: twi 0,%0,0\n" \ 432 "2: isync\n" \ 433 "3: nop\n" \ 434 "4:\n" \ 435 ".section .fixup,\"ax\"\n" \ 436 "5: li %0,-1\n" \ 437 " b 4b\n" \ 438 ".previous\n" \ 439 EX_TABLE(0b, 5b) \ 440 EX_TABLE(1b, 5b) \ 441 EX_TABLE(2b, 5b) \ 442 EX_TABLE(3b, 5b) \ 443 : "=&r" (x) \ 444 : "r" (port + _IO_BASE) \ 445 : "memory"); \ 446 return x; \ 447 } 448 449 #define __do_out_asm(name, op) \ 450 static inline void name(unsigned int val, unsigned int port) \ 451 { \ 452 __asm__ __volatile__( \ 453 "sync\n" \ 454 "0:" op " %0,0,%1\n" \ 455 "1: sync\n" \ 456 "2:\n" \ 457 EX_TABLE(0b, 2b) \ 458 EX_TABLE(1b, 2b) \ 459 : : "r" (val), "r" (port + _IO_BASE) \ 460 : "memory"); \ 461 } 462 463 __do_in_asm(_rec_inb, "lbzx") 464 __do_in_asm(_rec_inw, "lhbrx") 465 __do_in_asm(_rec_inl, "lwbrx") 466 __do_out_asm(_rec_outb, "stbx") 467 __do_out_asm(_rec_outw, "sthbrx") 468 __do_out_asm(_rec_outl, "stwbrx") 469 470 #endif /* CONFIG_PPC32 */ 471 472 /* The "__do_*" operations below provide the actual "base" implementation 473 * for each of the defined accessors. Some of them use the out_* functions 474 * directly, some of them still use EEH, though we might change that in the 475 * future. Those macros below provide the necessary argument swapping and 476 * handling of the IO base for PIO. 477 * 478 * They are themselves used by the macros that define the actual accessors 479 * and can be used by the hooks if any. 480 * 481 * Note that PIO operations are always defined in terms of their corresonding 482 * MMIO operations. That allows platforms like iSeries who want to modify the 483 * behaviour of both to only hook on the MMIO version and get both. It's also 484 * possible to hook directly at the toplevel PIO operation if they have to 485 * be handled differently 486 */ 487 #define __do_writeb(val, addr) out_8(PCI_FIX_ADDR(addr), val) 488 #define __do_writew(val, addr) out_le16(PCI_FIX_ADDR(addr), val) 489 #define __do_writel(val, addr) out_le32(PCI_FIX_ADDR(addr), val) 490 #define __do_writeq(val, addr) out_le64(PCI_FIX_ADDR(addr), val) 491 #define __do_writew_be(val, addr) out_be16(PCI_FIX_ADDR(addr), val) 492 #define __do_writel_be(val, addr) out_be32(PCI_FIX_ADDR(addr), val) 493 #define __do_writeq_be(val, addr) out_be64(PCI_FIX_ADDR(addr), val) 494 495 #ifdef CONFIG_EEH 496 #define __do_readb(addr) eeh_readb(PCI_FIX_ADDR(addr)) 497 #define __do_readw(addr) eeh_readw(PCI_FIX_ADDR(addr)) 498 #define __do_readl(addr) eeh_readl(PCI_FIX_ADDR(addr)) 499 #define __do_readq(addr) eeh_readq(PCI_FIX_ADDR(addr)) 500 #define __do_readw_be(addr) eeh_readw_be(PCI_FIX_ADDR(addr)) 501 #define __do_readl_be(addr) eeh_readl_be(PCI_FIX_ADDR(addr)) 502 #define __do_readq_be(addr) eeh_readq_be(PCI_FIX_ADDR(addr)) 503 #else /* CONFIG_EEH */ 504 #define __do_readb(addr) in_8(PCI_FIX_ADDR(addr)) 505 #define __do_readw(addr) in_le16(PCI_FIX_ADDR(addr)) 506 #define __do_readl(addr) in_le32(PCI_FIX_ADDR(addr)) 507 #define __do_readq(addr) in_le64(PCI_FIX_ADDR(addr)) 508 #define __do_readw_be(addr) in_be16(PCI_FIX_ADDR(addr)) 509 #define __do_readl_be(addr) in_be32(PCI_FIX_ADDR(addr)) 510 #define __do_readq_be(addr) in_be64(PCI_FIX_ADDR(addr)) 511 #endif /* !defined(CONFIG_EEH) */ 512 513 #ifdef CONFIG_PPC32 514 #define __do_outb(val, port) _rec_outb(val, port) 515 #define __do_outw(val, port) _rec_outw(val, port) 516 #define __do_outl(val, port) _rec_outl(val, port) 517 #define __do_inb(port) _rec_inb(port) 518 #define __do_inw(port) _rec_inw(port) 519 #define __do_inl(port) _rec_inl(port) 520 #else /* CONFIG_PPC32 */ 521 #define __do_outb(val, port) writeb(val,(PCI_IO_ADDR)_IO_BASE+port); 522 #define __do_outw(val, port) writew(val,(PCI_IO_ADDR)_IO_BASE+port); 523 #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port); 524 #define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port); 525 #define __do_inw(port) readw((PCI_IO_ADDR)_IO_BASE + port); 526 #define __do_inl(port) readl((PCI_IO_ADDR)_IO_BASE + port); 527 #endif /* !CONFIG_PPC32 */ 528 529 #ifdef CONFIG_EEH 530 #define __do_readsb(a, b, n) eeh_readsb(PCI_FIX_ADDR(a), (b), (n)) 531 #define __do_readsw(a, b, n) eeh_readsw(PCI_FIX_ADDR(a), (b), (n)) 532 #define __do_readsl(a, b, n) eeh_readsl(PCI_FIX_ADDR(a), (b), (n)) 533 #else /* CONFIG_EEH */ 534 #define __do_readsb(a, b, n) _insb(PCI_FIX_ADDR(a), (b), (n)) 535 #define __do_readsw(a, b, n) _insw(PCI_FIX_ADDR(a), (b), (n)) 536 #define __do_readsl(a, b, n) _insl(PCI_FIX_ADDR(a), (b), (n)) 537 #endif /* !CONFIG_EEH */ 538 #define __do_writesb(a, b, n) _outsb(PCI_FIX_ADDR(a),(b),(n)) 539 #define __do_writesw(a, b, n) _outsw(PCI_FIX_ADDR(a),(b),(n)) 540 #define __do_writesl(a, b, n) _outsl(PCI_FIX_ADDR(a),(b),(n)) 541 542 #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) 543 #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) 544 #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) 545 #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) 546 #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) 547 #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) 548 549 #define __do_memset_io(addr, c, n) \ 550 _memset_io(PCI_FIX_ADDR(addr), c, n) 551 #define __do_memcpy_toio(dst, src, n) \ 552 _memcpy_toio(PCI_FIX_ADDR(dst), src, n) 553 554 #ifdef CONFIG_EEH 555 #define __do_memcpy_fromio(dst, src, n) \ 556 eeh_memcpy_fromio(dst, PCI_FIX_ADDR(src), n) 557 #else /* CONFIG_EEH */ 558 #define __do_memcpy_fromio(dst, src, n) \ 559 _memcpy_fromio(dst,PCI_FIX_ADDR(src),n) 560 #endif /* !CONFIG_EEH */ 561 562 #ifdef CONFIG_PPC_INDIRECT_PIO 563 #define DEF_PCI_HOOK_pio(x) x 564 #else 565 #define DEF_PCI_HOOK_pio(x) NULL 566 #endif 567 568 #ifdef CONFIG_PPC_INDIRECT_MMIO 569 #define DEF_PCI_HOOK_mem(x) x 570 #else 571 #define DEF_PCI_HOOK_mem(x) NULL 572 #endif 573 574 /* Structure containing all the hooks */ 575 extern struct ppc_pci_io { 576 577 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa) ret (*name) at; 578 #define DEF_PCI_AC_NORET(name, at, al, space, aa) void (*name) at; 579 580 #include <asm/io-defs.h> 581 582 #undef DEF_PCI_AC_RET 583 #undef DEF_PCI_AC_NORET 584 585 } ppc_pci_io; 586 587 /* The inline wrappers */ 588 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \ 589 static inline ret name at \ 590 { \ 591 if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \ 592 return ppc_pci_io.name al; \ 593 return __do_##name al; \ 594 } 595 596 #define DEF_PCI_AC_NORET(name, at, al, space, aa) \ 597 static inline void name at \ 598 { \ 599 if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \ 600 ppc_pci_io.name al; \ 601 else \ 602 __do_##name al; \ 603 } 604 605 #include <asm/io-defs.h> 606 607 #undef DEF_PCI_AC_RET 608 #undef DEF_PCI_AC_NORET 609 610 /* Some drivers check for the presence of readq & writeq with 611 * a #ifdef, so we make them happy here. 612 */ 613 #ifdef __powerpc64__ 614 #define readq readq 615 #define writeq writeq 616 #endif 617 618 /* 619 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 620 * access 621 */ 622 #define xlate_dev_mem_ptr(p) __va(p) 623 624 /* 625 * Convert a virtual cached pointer to an uncached pointer 626 */ 627 #define xlate_dev_kmem_ptr(p) p 628 629 /* 630 * We don't do relaxed operations yet, at least not with this semantic 631 */ 632 #define readb_relaxed(addr) readb(addr) 633 #define readw_relaxed(addr) readw(addr) 634 #define readl_relaxed(addr) readl(addr) 635 #define readq_relaxed(addr) readq(addr) 636 #define writeb_relaxed(v, addr) writeb(v, addr) 637 #define writew_relaxed(v, addr) writew(v, addr) 638 #define writel_relaxed(v, addr) writel(v, addr) 639 #define writeq_relaxed(v, addr) writeq(v, addr) 640 641 #include <asm-generic/iomap.h> 642 643 static inline void iosync(void) 644 { 645 __asm__ __volatile__ ("sync" : : : "memory"); 646 } 647 648 /* Enforce in-order execution of data I/O. 649 * No distinction between read/write on PPC; use eieio for all three. 650 * Those are fairly week though. They don't provide a barrier between 651 * MMIO and cacheable storage nor do they provide a barrier vs. locks, 652 * they only provide barriers between 2 __raw MMIO operations and 653 * possibly break write combining. 654 */ 655 #define iobarrier_rw() eieio() 656 #define iobarrier_r() eieio() 657 #define iobarrier_w() eieio() 658 659 660 /* 661 * output pause versions need a delay at least for the 662 * w83c105 ide controller in a p610. 663 */ 664 #define inb_p(port) inb(port) 665 #define outb_p(val, port) (udelay(1), outb((val), (port))) 666 #define inw_p(port) inw(port) 667 #define outw_p(val, port) (udelay(1), outw((val), (port))) 668 #define inl_p(port) inl(port) 669 #define outl_p(val, port) (udelay(1), outl((val), (port))) 670 671 672 #define IO_SPACE_LIMIT ~(0UL) 673 674 675 /** 676 * ioremap - map bus memory into CPU space 677 * @address: bus address of the memory 678 * @size: size of the resource to map 679 * 680 * ioremap performs a platform specific sequence of operations to 681 * make bus memory CPU accessible via the readb/readw/readl/writeb/ 682 * writew/writel functions and the other mmio helpers. The returned 683 * address is not guaranteed to be usable directly as a virtual 684 * address. 685 * 686 * We provide a few variations of it: 687 * 688 * * ioremap is the standard one and provides non-cacheable guarded mappings 689 * and can be hooked by the platform via ppc_md 690 * 691 * * ioremap_prot allows to specify the page flags as an argument and can 692 * also be hooked by the platform via ppc_md. 693 * 694 * * ioremap_nocache is identical to ioremap 695 * 696 * * ioremap_wc enables write combining 697 * 698 * * ioremap_wt enables write through 699 * 700 * * ioremap_coherent maps coherent cached memory 701 * 702 * * iounmap undoes such a mapping and can be hooked 703 * 704 * * __ioremap_at (and the pending __iounmap_at) are low level functions to 705 * create hand-made mappings for use only by the PCI code and cannot 706 * currently be hooked. Must be page aligned. 707 * 708 * * __ioremap_caller is the same as above but takes an explicit caller 709 * reference rather than using __builtin_return_address(0) 710 * 711 */ 712 extern void __iomem *ioremap(phys_addr_t address, unsigned long size); 713 extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size, 714 unsigned long flags); 715 extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size); 716 void __iomem *ioremap_wt(phys_addr_t address, unsigned long size); 717 void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size); 718 #define ioremap_nocache(addr, size) ioremap((addr), (size)) 719 #define ioremap_uc(addr, size) ioremap((addr), (size)) 720 #define ioremap_cache(addr, size) \ 721 ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL)) 722 723 extern void iounmap(volatile void __iomem *addr); 724 725 int early_ioremap_range(unsigned long ea, phys_addr_t pa, 726 unsigned long size, pgprot_t prot); 727 void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size, 728 pgprot_t prot, void *caller); 729 730 extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size, 731 pgprot_t prot, void *caller); 732 733 extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea, 734 unsigned long size, pgprot_t prot); 735 extern void __iounmap_at(void *ea, unsigned long size); 736 737 /* 738 * When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation 739 * which needs some additional definitions here. They basically allow PIO 740 * space overall to be 1GB. This will work as long as we never try to use 741 * iomap to map MMIO below 1GB which should be fine on ppc64 742 */ 743 #define HAVE_ARCH_PIO_SIZE 1 744 #define PIO_OFFSET 0x00000000UL 745 #define PIO_MASK (FULL_IO_SIZE - 1) 746 #define PIO_RESERVED (FULL_IO_SIZE) 747 748 #define mmio_read16be(addr) readw_be(addr) 749 #define mmio_read32be(addr) readl_be(addr) 750 #define mmio_read64be(addr) readq_be(addr) 751 #define mmio_write16be(val, addr) writew_be(val, addr) 752 #define mmio_write32be(val, addr) writel_be(val, addr) 753 #define mmio_write64be(val, addr) writeq_be(val, addr) 754 #define mmio_insb(addr, dst, count) readsb(addr, dst, count) 755 #define mmio_insw(addr, dst, count) readsw(addr, dst, count) 756 #define mmio_insl(addr, dst, count) readsl(addr, dst, count) 757 #define mmio_outsb(addr, src, count) writesb(addr, src, count) 758 #define mmio_outsw(addr, src, count) writesw(addr, src, count) 759 #define mmio_outsl(addr, src, count) writesl(addr, src, count) 760 761 /** 762 * virt_to_phys - map virtual addresses to physical 763 * @address: address to remap 764 * 765 * The returned physical address is the physical (CPU) mapping for 766 * the memory address given. It is only valid to use this function on 767 * addresses directly mapped or allocated via kmalloc. 768 * 769 * This function does not give bus mappings for DMA transfers. In 770 * almost all conceivable cases a device driver should not be using 771 * this function 772 */ 773 static inline unsigned long virt_to_phys(volatile void * address) 774 { 775 WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !virt_addr_valid(address)); 776 777 return __pa((unsigned long)address); 778 } 779 780 /** 781 * phys_to_virt - map physical address to virtual 782 * @address: address to remap 783 * 784 * The returned virtual address is a current CPU mapping for 785 * the memory address given. It is only valid to use this function on 786 * addresses that have a kernel mapping 787 * 788 * This function does not handle bus mappings for DMA transfers. In 789 * almost all conceivable cases a device driver should not be using 790 * this function 791 */ 792 static inline void * phys_to_virt(unsigned long address) 793 { 794 return (void *)__va(address); 795 } 796 797 /* 798 * Change "struct page" to physical address. 799 */ 800 static inline phys_addr_t page_to_phys(struct page *page) 801 { 802 unsigned long pfn = page_to_pfn(page); 803 804 WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !pfn_valid(pfn)); 805 806 return PFN_PHYS(pfn); 807 } 808 809 /* 810 * 32 bits still uses virt_to_bus() for it's implementation of DMA 811 * mappings se we have to keep it defined here. We also have some old 812 * drivers (shame shame shame) that use bus_to_virt() and haven't been 813 * fixed yet so I need to define it here. 814 */ 815 #ifdef CONFIG_PPC32 816 817 static inline unsigned long virt_to_bus(volatile void * address) 818 { 819 if (address == NULL) 820 return 0; 821 return __pa(address) + PCI_DRAM_OFFSET; 822 } 823 824 static inline void * bus_to_virt(unsigned long address) 825 { 826 if (address == 0) 827 return NULL; 828 return __va(address - PCI_DRAM_OFFSET); 829 } 830 831 #define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET) 832 833 #endif /* CONFIG_PPC32 */ 834 835 /* access ports */ 836 #define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) | (_v)) 837 #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v)) 838 839 #define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) | (_v)) 840 #define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v)) 841 842 #define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v)) 843 #define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v)) 844 845 /* Clear and set bits in one shot. These macros can be used to clear and 846 * set multiple bits in a register using a single read-modify-write. These 847 * macros can also be used to set a multiple-bit bit pattern using a mask, 848 * by specifying the mask in the 'clear' parameter and the new bit pattern 849 * in the 'set' parameter. 850 */ 851 852 #define clrsetbits(type, addr, clear, set) \ 853 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 854 855 #ifdef __powerpc64__ 856 #define clrsetbits_be64(addr, clear, set) clrsetbits(be64, addr, clear, set) 857 #define clrsetbits_le64(addr, clear, set) clrsetbits(le64, addr, clear, set) 858 #endif 859 860 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 861 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 862 863 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 864 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 865 866 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 867 868 #endif /* __KERNEL__ */ 869 870 #endif /* _ASM_POWERPC_IO_H */ 871