1 /* 2 * linux/include/asm-nds/io.h 3 * 4 * Copyright (C) 1996-2000 Russell King 5 * 6 * Copyright (C) 2011 Andes Technology Corporation 7 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> 8 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * Modifications: 15 * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both 16 * constant addresses and variable addresses. 17 * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture 18 * specific IO header files. 19 * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. 20 * 04-Apr-1999 PJB Added check_signature. 21 * 12-Dec-1999 RMK More cleanups 22 * 18-Jun-2000 RMK Removed virt_to_* and friends definitions 23 */ 24 #ifndef __ASM_NDS_IO_H 25 #define __ASM_NDS_IO_H 26 27 /* 28 * CAUTION: 29 * - do not implement for NDS32 Arch yet. 30 * - cmd_pci.c, cmd_scsi.c, Lynxkdi.c, usb.c, usb_storage.c, etc... 31 * iinclude asm/io.h 32 */ 33 34 #ifdef __KERNEL__ 35 36 #include <linux/types.h> 37 #include <asm/byteorder.h> 38 39 static inline void sync(void) 40 { 41 } 42 43 /* 44 * Given a physical address and a length, return a virtual address 45 * that can be used to access the memory range with the caching 46 * properties specified by "flags". 47 */ 48 #define MAP_NOCACHE (0) 49 #define MAP_WRCOMBINE (0) 50 #define MAP_WRBACK (0) 51 #define MAP_WRTHROUGH (0) 52 53 static inline void * 54 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 55 { 56 return (void *)paddr; 57 } 58 59 /* 60 * Take down a mapping set up by map_physmem(). 61 */ 62 static inline void unmap_physmem(void *vaddr, unsigned long flags) 63 { 64 65 } 66 67 static inline phys_addr_t virt_to_phys(void *vaddr) 68 { 69 return (phys_addr_t)(vaddr); 70 } 71 72 /* 73 * Generic virtual read/write. Note that we don't support half-word 74 * read/writes. We define __arch_*[bl] here, and leave __arch_*w 75 * to the architecture specific code. 76 */ 77 #define __arch_getb(a) (*(unsigned char *)(a)) 78 #define __arch_getw(a) (*(unsigned short *)(a)) 79 #define __arch_getl(a) (*(unsigned int *)(a)) 80 81 #define __arch_putb(v, a) (*(unsigned char *)(a) = (v)) 82 #define __arch_putw(v, a) (*(unsigned short *)(a) = (v)) 83 #define __arch_putl(v, a) (*(unsigned int *)(a) = (v)) 84 85 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen); 86 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen); 87 extern void __raw_writesl(unsigned int addr, const void *data, int longlen); 88 89 extern void __raw_readsb(unsigned int addr, void *data, int bytelen); 90 extern void __raw_readsw(unsigned int addr, void *data, int wordlen); 91 extern void __raw_readsl(unsigned int addr, void *data, int longlen); 92 93 #define __raw_writeb(v, a) __arch_putb(v, a) 94 #define __raw_writew(v, a) __arch_putw(v, a) 95 #define __raw_writel(v, a) __arch_putl(v, a) 96 97 #define __raw_readb(a) __arch_getb(a) 98 #define __raw_readw(a) __arch_getw(a) 99 #define __raw_readl(a) __arch_getl(a) 100 101 /* 102 * TODO: The kernel offers some more advanced versions of barriers, it might 103 * have some advantages to use them instead of the simple one here. 104 */ 105 #define dmb() __asm__ __volatile__ ("" : : : "memory") 106 #define __iormb() dmb() 107 #define __iowmb() dmb() 108 109 static inline void writeb(unsigned char val, unsigned char *addr) 110 { 111 __iowmb(); 112 __arch_putb(val, addr); 113 } 114 115 static inline void writew(unsigned short val, unsigned short *addr) 116 { 117 __iowmb(); 118 __arch_putw(val, addr); 119 120 } 121 122 static inline void writel(unsigned int val, unsigned int *addr) 123 { 124 __iowmb(); 125 __arch_putl(val, addr); 126 } 127 128 static inline unsigned char readb(unsigned char *addr) 129 { 130 u8 val; 131 132 val = __arch_getb(addr); 133 __iormb(); 134 return val; 135 } 136 137 static inline unsigned short readw(unsigned short *addr) 138 { 139 u16 val; 140 141 val = __arch_getw(addr); 142 __iormb(); 143 return val; 144 } 145 146 static inline unsigned int readl(unsigned int *addr) 147 { 148 u32 val; 149 150 val = __arch_getl(addr); 151 __iormb(); 152 return val; 153 } 154 155 /* 156 * The compiler seems to be incapable of optimising constants 157 * properly. Spell it out to the compiler in some cases. 158 * These are only valid for small values of "off" (< 1<<12) 159 */ 160 #define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off) 161 #define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off) 162 #define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off) 163 164 #define __raw_base_readb(base, off) __arch_base_getb(base, off) 165 #define __raw_base_readw(base, off) __arch_base_getw(base, off) 166 #define __raw_base_readl(base, off) __arch_base_getl(base, off) 167 168 #define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a) 169 #define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a)) 170 171 #define out_le32(a, v) out_arch(l, le32, a, v) 172 #define out_le16(a, v) out_arch(w, le16, a, v) 173 174 #define in_le32(a) in_arch(l, le32, a) 175 #define in_le16(a) in_arch(w, le16, a) 176 177 #define out_be32(a, v) out_arch(l, be32, a, v) 178 #define out_be16(a, v) out_arch(w, be16, a, v) 179 180 #define in_be32(a) in_arch(l, be32, a) 181 #define in_be16(a) in_arch(w, be16, a) 182 183 #define out_8(a, v) __raw_writeb(v, a) 184 #define in_8(a) __raw_readb(a) 185 186 /* 187 * Clear and set bits in one shot. These macros can be used to clear and 188 * set multiple bits in a register using a single call. These macros can 189 * also be used to set a multiple-bit bit pattern using a mask, by 190 * specifying the mask in the 'clear' parameter and the new bit pattern 191 * in the 'set' parameter. 192 */ 193 194 #define clrbits(type, addr, clear) \ 195 out_##type((addr), in_##type(addr) & ~(clear)) 196 197 #define setbits(type, addr, set) \ 198 out_##type((addr), in_##type(addr) | (set)) 199 200 #define clrsetbits(type, addr, clear, set) \ 201 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 202 203 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) 204 #define setbits_be32(addr, set) setbits(be32, addr, set) 205 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 206 207 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) 208 #define setbits_le32(addr, set) setbits(le32, addr, set) 209 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 210 211 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) 212 #define setbits_be16(addr, set) setbits(be16, addr, set) 213 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 214 215 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) 216 #define setbits_le16(addr, set) setbits(le16, addr, set) 217 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 218 219 #define clrbits_8(addr, clear) clrbits(8, addr, clear) 220 #define setbits_8(addr, set) setbits(8, addr, set) 221 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 222 223 /* 224 * Now, pick up the machine-defined IO definitions 225 * #include <asm/arch/io.h> 226 */ 227 228 /* 229 * IO port access primitives 230 * ------------------------- 231 * 232 * The NDS32 doesn't have special IO access instructions just like ARM; 233 * all IO is memory mapped. 234 * Note that these are defined to perform little endian accesses 235 * only. Their primary purpose is to access PCI and ISA peripherals. 236 * 237 * Note that for a big endian machine, this implies that the following 238 * big endian mode connectivity is in place, as described by numerious 239 * ARM documents: 240 * 241 * PCI: D0-D7 D8-D15 D16-D23 D24-D31 242 * ARM: D24-D31 D16-D23 D8-D15 D0-D7 243 * 244 * The machine specific io.h include defines __io to translate an "IO" 245 * address to a memory address. 246 * 247 * Note that we prevent GCC re-ordering or caching values in expressions 248 * by introducing sequence points into the in*() definitions. Note that 249 * __raw_* do not guarantee this behaviour. 250 * 251 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. 252 */ 253 #ifdef __io 254 #define outb(v, p) __raw_writeb(v, __io(p)) 255 #define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p)) 256 #define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p)) 257 258 #define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; }) 259 #define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; }) 260 #define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; }) 261 262 #define outsb(p, d, l) writesb(__io(p), d, l) 263 #define outsw(p, d, l) writesw(__io(p), d, l) 264 #define outsl(p, d, l) writesl(__io(p), d, l) 265 266 #define insb(p, d, l) readsb(__io(p), d, l) 267 #define insw(p, d, l) readsw(__io(p), d, l) 268 #define insl(p, d, l) readsl(__io(p), d, l) 269 270 static inline void readsb(unsigned int *addr, void * data, int bytelen) 271 { 272 unsigned char *ptr = (unsigned char *)addr; 273 unsigned char *ptr2 = (unsigned char *)data; 274 while (bytelen) { 275 *ptr2 = *ptr; 276 ptr2++; 277 bytelen--; 278 } 279 } 280 281 static inline void readsw(unsigned int *addr, void * data, int wordlen) 282 { 283 unsigned short *ptr = (unsigned short *)addr; 284 unsigned short *ptr2 = (unsigned short *)data; 285 while (wordlen) { 286 *ptr2 = *ptr; 287 ptr2++; 288 wordlen--; 289 } 290 } 291 292 static inline void readsl(unsigned int *addr, void * data, int longlen) 293 { 294 unsigned int *ptr = (unsigned int *)addr; 295 unsigned int *ptr2 = (unsigned int *)data; 296 while (longlen) { 297 *ptr2 = *ptr; 298 ptr2++; 299 longlen--; 300 } 301 } 302 static inline void writesb(unsigned int *addr, const void * data, int bytelen) 303 { 304 unsigned char *ptr = (unsigned char *)addr; 305 unsigned char *ptr2 = (unsigned char *)data; 306 while (bytelen) { 307 *ptr = *ptr2; 308 ptr2++; 309 bytelen--; 310 } 311 } 312 static inline void writesw(unsigned int *addr, const void * data, int wordlen) 313 { 314 unsigned short *ptr = (unsigned short *)addr; 315 unsigned short *ptr2 = (unsigned short *)data; 316 while (wordlen) { 317 *ptr = *ptr2; 318 ptr2++; 319 wordlen--; 320 } 321 } 322 static inline void writesl(unsigned int *addr, const void * data, int longlen) 323 { 324 unsigned int *ptr = (unsigned int *)addr; 325 unsigned int *ptr2 = (unsigned int *)data; 326 while (longlen) { 327 *ptr = *ptr2; 328 ptr2++; 329 longlen--; 330 } 331 } 332 #endif 333 334 #define outb_p(val, port) outb((val), (port)) 335 #define outw_p(val, port) outw((val), (port)) 336 #define outl_p(val, port) outl((val), (port)) 337 #define inb_p(port) inb((port)) 338 #define inw_p(port) inw((port)) 339 #define inl_p(port) inl((port)) 340 341 #define outsb_p(port, from, len) outsb(port, from, len) 342 #define outsw_p(port, from, len) outsw(port, from, len) 343 #define outsl_p(port, from, len) outsl(port, from, len) 344 #define insb_p(port, to, len) insb(port, to, len) 345 #define insw_p(port, to, len) insw(port, to, len) 346 #define insl_p(port, to, len) insl(port, to, len) 347 348 /* 349 * ioremap and friends. 350 * 351 * ioremap takes a PCI memory address, as specified in 352 * linux/Documentation/IO-mapping.txt. If you want a 353 * physical address, use __ioremap instead. 354 */ 355 extern void *__ioremap(unsigned long offset, size_t size, unsigned long flags); 356 extern void __iounmap(void *addr); 357 358 /* 359 * Generic ioremap support. 360 * 361 * Define: 362 * iomem_valid_addr(off,size) 363 * iomem_to_phys(off) 364 */ 365 #ifdef iomem_valid_addr 366 #define __arch_ioremap(off, sz, nocache) \ 367 ({ \ 368 unsigned long _off = (off), _size = (sz); \ 369 void *_ret = (void *)0; \ 370 if (iomem_valid_addr(_off, _size)) \ 371 _ret = __ioremap(iomem_to_phys(_off), _size, 0); \ 372 _ret; \ 373 }) 374 375 #define __arch_iounmap __iounmap 376 #endif 377 378 #define ioremap(off, sz) __arch_ioremap((off), (sz), 0) 379 #define ioremap_nocache(off, sz) __arch_ioremap((off), (sz), 1) 380 #define iounmap(_addr) __arch_iounmap(_addr) 381 382 /* 383 * DMA-consistent mapping functions. These allocate/free a region of 384 * uncached, unwrite-buffered mapped memory space for use with DMA 385 * devices. This is the "generic" version. The PCI specific version 386 * is in pci.h 387 */ 388 extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle); 389 extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle); 390 extern void consistent_sync(void *vaddr, size_t size, int rw); 391 392 /* 393 * String version of IO memory access ops: 394 */ 395 extern void _memcpy_fromio(void *, unsigned long, size_t); 396 extern void _memcpy_toio(unsigned long, const void *, size_t); 397 extern void _memset_io(unsigned long, int, size_t); 398 399 extern void __readwrite_bug(const char *fn); 400 401 /* 402 * If this architecture has PCI memory IO, then define the read/write 403 * macros. These should only be used with the cookie passed from 404 * ioremap. 405 */ 406 #ifdef __mem_pci 407 408 #define readb(c) ({ unsigned int __v = \ 409 __raw_readb(__mem_pci(c)); __v; }) 410 #define readw(c) ({ unsigned int __v = \ 411 le16_to_cpu(__raw_readw(__mem_pci(c))); __v; }) 412 #define readl(c) ({ unsigned int __v = \ 413 le32_to_cpu(__raw_readl(__mem_pci(c))); __v; }) 414 415 #define writeb(v, c) __raw_writeb(v, __mem_pci(c)) 416 #define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c)) 417 #define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c)) 418 419 #define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l)) 420 #define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l)) 421 #define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l)) 422 423 #define eth_io_copy_and_sum(s, c, l, b) \ 424 eth_copy_and_sum((s), __mem_pci(c), (l), (b)) 425 426 static inline int 427 check_signature(unsigned long io_addr, const unsigned char *signature, 428 int length) 429 { 430 int retval = 0; 431 do { 432 if (readb(io_addr) != *signature) 433 goto out; 434 io_addr++; 435 signature++; 436 length--; 437 } while (length); 438 retval = 1; 439 out: 440 return retval; 441 } 442 #endif /* __mem_pci */ 443 444 /* 445 * If this architecture has ISA IO, then define the isa_read/isa_write 446 * macros. 447 */ 448 #ifdef __mem_isa 449 450 #define isa_readb(addr) __raw_readb(__mem_isa(addr)) 451 #define isa_readw(addr) __raw_readw(__mem_isa(addr)) 452 #define isa_readl(addr) __raw_readl(__mem_isa(addr)) 453 #define isa_writeb(val, addr) __raw_writeb(val, __mem_isa(addr)) 454 #define isa_writew(val, addr) __raw_writew(val, __mem_isa(addr)) 455 #define isa_writel(val, addr) __raw_writel(val, __mem_isa(addr)) 456 #define isa_memset_io(a, b, c) _memset_io(__mem_isa(a), (b), (c)) 457 #define isa_memcpy_fromio(a, b, c) _memcpy_fromio((a), __mem_isa(b), (c)) 458 #define isa_memcpy_toio(a, b, c) _memcpy_toio(__mem_isa((a)), (b), (c)) 459 460 #define isa_eth_io_copy_and_sum(a, b, c, d) \ 461 eth_copy_and_sum((a), __mem_isa(b), (c), (d)) 462 463 static inline int 464 isa_check_signature(unsigned long io_addr, const unsigned char *signature, 465 int length) 466 { 467 int retval = 0; 468 do { 469 if (isa_readb(io_addr) != *signature) 470 goto out; 471 io_addr++; 472 signature++; 473 length--; 474 } while (length); 475 retval = 1; 476 out: 477 return retval; 478 } 479 480 #else /* __mem_isa */ 481 482 #define isa_readb(addr) (__readwrite_bug("isa_readb"), 0) 483 #define isa_readw(addr) (__readwrite_bug("isa_readw"), 0) 484 #define isa_readl(addr) (__readwrite_bug("isa_readl"), 0) 485 #define isa_writeb(val, addr) __readwrite_bug("isa_writeb") 486 #define isa_writew(val, addr) __readwrite_bug("isa_writew") 487 #define isa_writel(val, addr) __readwrite_bug("isa_writel") 488 #define isa_memset_io(a, b, c) __readwrite_bug("isa_memset_io") 489 #define isa_memcpy_fromio(a, b, c) __readwrite_bug("isa_memcpy_fromio") 490 #define isa_memcpy_toio(a, b, c) __readwrite_bug("isa_memcpy_toio") 491 492 #define isa_eth_io_copy_and_sum(a, b, c, d) \ 493 __readwrite_bug("isa_eth_io_copy_and_sum") 494 495 #define isa_check_signature(io, sig, len) (0) 496 497 #endif /* __mem_isa */ 498 #endif /* __KERNEL__ */ 499 #endif /* __ASM_NDS_IO_H */ 500