]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Alpha IO and memory functions. | |
4 | */ | |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/types.h> | |
8 | #include <linux/string.h> | |
9 | #include <linux/module.h> | |
10 | #include <asm/io.h> | |
11 | ||
12 | /* Out-of-line versions of the i/o routines that redirect into the | |
13 | platform-specific version. Note that "platform-specific" may mean | |
14 | "generic", which bumps through the machine vector. */ | |
15 | ||
16 | unsigned int | |
17 | ioread8(void __iomem *addr) | |
18 | { | |
19 | unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr); | |
20 | mb(); | |
21 | return ret; | |
22 | } | |
23 | ||
24 | unsigned int ioread16(void __iomem *addr) | |
25 | { | |
26 | unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr); | |
27 | mb(); | |
28 | return ret; | |
29 | } | |
30 | ||
31 | unsigned int ioread32(void __iomem *addr) | |
32 | { | |
33 | unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr); | |
34 | mb(); | |
35 | return ret; | |
36 | } | |
37 | ||
38 | void iowrite8(u8 b, void __iomem *addr) | |
39 | { | |
40 | IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr); | |
41 | mb(); | |
42 | } | |
43 | ||
44 | void iowrite16(u16 b, void __iomem *addr) | |
45 | { | |
46 | IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr); | |
47 | mb(); | |
48 | } | |
49 | ||
50 | void iowrite32(u32 b, void __iomem *addr) | |
51 | { | |
52 | IO_CONCAT(__IO_PREFIX,iowrite32)(b, addr); | |
53 | mb(); | |
54 | } | |
55 | ||
56 | EXPORT_SYMBOL(ioread8); | |
57 | EXPORT_SYMBOL(ioread16); | |
58 | EXPORT_SYMBOL(ioread32); | |
59 | EXPORT_SYMBOL(iowrite8); | |
60 | EXPORT_SYMBOL(iowrite16); | |
61 | EXPORT_SYMBOL(iowrite32); | |
62 | ||
63 | u8 inb(unsigned long port) | |
64 | { | |
65 | return ioread8(ioport_map(port, 1)); | |
66 | } | |
67 | ||
68 | u16 inw(unsigned long port) | |
69 | { | |
70 | return ioread16(ioport_map(port, 2)); | |
71 | } | |
72 | ||
73 | u32 inl(unsigned long port) | |
74 | { | |
75 | return ioread32(ioport_map(port, 4)); | |
76 | } | |
77 | ||
78 | void outb(u8 b, unsigned long port) | |
79 | { | |
80 | iowrite8(b, ioport_map(port, 1)); | |
81 | } | |
82 | ||
83 | void outw(u16 b, unsigned long port) | |
84 | { | |
85 | iowrite16(b, ioport_map(port, 2)); | |
86 | } | |
87 | ||
88 | void outl(u32 b, unsigned long port) | |
89 | { | |
90 | iowrite32(b, ioport_map(port, 4)); | |
91 | } | |
92 | ||
93 | EXPORT_SYMBOL(inb); | |
94 | EXPORT_SYMBOL(inw); | |
95 | EXPORT_SYMBOL(inl); | |
96 | EXPORT_SYMBOL(outb); | |
97 | EXPORT_SYMBOL(outw); | |
98 | EXPORT_SYMBOL(outl); | |
99 | ||
100 | u8 __raw_readb(const volatile void __iomem *addr) | |
101 | { | |
102 | return IO_CONCAT(__IO_PREFIX,readb)(addr); | |
103 | } | |
104 | ||
105 | u16 __raw_readw(const volatile void __iomem *addr) | |
106 | { | |
107 | return IO_CONCAT(__IO_PREFIX,readw)(addr); | |
108 | } | |
109 | ||
110 | u32 __raw_readl(const volatile void __iomem *addr) | |
111 | { | |
112 | return IO_CONCAT(__IO_PREFIX,readl)(addr); | |
113 | } | |
114 | ||
115 | u64 __raw_readq(const volatile void __iomem *addr) | |
116 | { | |
117 | return IO_CONCAT(__IO_PREFIX,readq)(addr); | |
118 | } | |
119 | ||
120 | void __raw_writeb(u8 b, volatile void __iomem *addr) | |
121 | { | |
122 | IO_CONCAT(__IO_PREFIX,writeb)(b, addr); | |
123 | } | |
124 | ||
125 | void __raw_writew(u16 b, volatile void __iomem *addr) | |
126 | { | |
127 | IO_CONCAT(__IO_PREFIX,writew)(b, addr); | |
128 | } | |
129 | ||
130 | void __raw_writel(u32 b, volatile void __iomem *addr) | |
131 | { | |
132 | IO_CONCAT(__IO_PREFIX,writel)(b, addr); | |
133 | } | |
134 | ||
135 | void __raw_writeq(u64 b, volatile void __iomem *addr) | |
136 | { | |
137 | IO_CONCAT(__IO_PREFIX,writeq)(b, addr); | |
138 | } | |
139 | ||
140 | EXPORT_SYMBOL(__raw_readb); | |
141 | EXPORT_SYMBOL(__raw_readw); | |
142 | EXPORT_SYMBOL(__raw_readl); | |
143 | EXPORT_SYMBOL(__raw_readq); | |
144 | EXPORT_SYMBOL(__raw_writeb); | |
145 | EXPORT_SYMBOL(__raw_writew); | |
146 | EXPORT_SYMBOL(__raw_writel); | |
147 | EXPORT_SYMBOL(__raw_writeq); | |
148 | ||
149 | u8 readb(const volatile void __iomem *addr) | |
150 | { | |
151 | u8 ret = __raw_readb(addr); | |
152 | mb(); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | u16 readw(const volatile void __iomem *addr) | |
157 | { | |
158 | u16 ret = __raw_readw(addr); | |
159 | mb(); | |
160 | return ret; | |
161 | } | |
162 | ||
163 | u32 readl(const volatile void __iomem *addr) | |
164 | { | |
165 | u32 ret = __raw_readl(addr); | |
166 | mb(); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | u64 readq(const volatile void __iomem *addr) | |
171 | { | |
172 | u64 ret = __raw_readq(addr); | |
173 | mb(); | |
174 | return ret; | |
175 | } | |
176 | ||
177 | void writeb(u8 b, volatile void __iomem *addr) | |
178 | { | |
179 | __raw_writeb(b, addr); | |
180 | mb(); | |
181 | } | |
182 | ||
183 | void writew(u16 b, volatile void __iomem *addr) | |
184 | { | |
185 | __raw_writew(b, addr); | |
186 | mb(); | |
187 | } | |
188 | ||
189 | void writel(u32 b, volatile void __iomem *addr) | |
190 | { | |
191 | __raw_writel(b, addr); | |
192 | mb(); | |
193 | } | |
194 | ||
195 | void writeq(u64 b, volatile void __iomem *addr) | |
196 | { | |
197 | __raw_writeq(b, addr); | |
198 | mb(); | |
199 | } | |
200 | ||
201 | EXPORT_SYMBOL(readb); | |
202 | EXPORT_SYMBOL(readw); | |
203 | EXPORT_SYMBOL(readl); | |
204 | EXPORT_SYMBOL(readq); | |
205 | EXPORT_SYMBOL(writeb); | |
206 | EXPORT_SYMBOL(writew); | |
207 | EXPORT_SYMBOL(writel); | |
208 | EXPORT_SYMBOL(writeq); | |
209 | ||
210 | ||
211 | /* | |
212 | * Read COUNT 8-bit bytes from port PORT into memory starting at SRC. | |
213 | */ | |
214 | void ioread8_rep(void __iomem *port, void *dst, unsigned long count) | |
215 | { | |
216 | while ((unsigned long)dst & 0x3) { | |
217 | if (!count) | |
218 | return; | |
219 | count--; | |
220 | *(unsigned char *)dst = ioread8(port); | |
221 | dst += 1; | |
222 | } | |
223 | ||
224 | while (count >= 4) { | |
225 | unsigned int w; | |
226 | count -= 4; | |
227 | w = ioread8(port); | |
228 | w |= ioread8(port) << 8; | |
229 | w |= ioread8(port) << 16; | |
230 | w |= ioread8(port) << 24; | |
231 | *(unsigned int *)dst = w; | |
232 | dst += 4; | |
233 | } | |
234 | ||
235 | while (count) { | |
236 | --count; | |
237 | *(unsigned char *)dst = ioread8(port); | |
238 | dst += 1; | |
239 | } | |
240 | } | |
241 | ||
242 | void insb(unsigned long port, void *dst, unsigned long count) | |
243 | { | |
244 | ioread8_rep(ioport_map(port, 1), dst, count); | |
245 | } | |
246 | ||
247 | EXPORT_SYMBOL(ioread8_rep); | |
248 | EXPORT_SYMBOL(insb); | |
249 | ||
250 | /* | |
251 | * Read COUNT 16-bit words from port PORT into memory starting at | |
252 | * SRC. SRC must be at least short aligned. This is used by the | |
253 | * IDE driver to read disk sectors. Performance is important, but | |
254 | * the interfaces seems to be slow: just using the inlined version | |
255 | * of the inw() breaks things. | |
256 | */ | |
257 | void ioread16_rep(void __iomem *port, void *dst, unsigned long count) | |
258 | { | |
259 | if (unlikely((unsigned long)dst & 0x3)) { | |
260 | if (!count) | |
261 | return; | |
262 | BUG_ON((unsigned long)dst & 0x1); | |
263 | count--; | |
264 | *(unsigned short *)dst = ioread16(port); | |
265 | dst += 2; | |
266 | } | |
267 | ||
268 | while (count >= 2) { | |
269 | unsigned int w; | |
270 | count -= 2; | |
271 | w = ioread16(port); | |
272 | w |= ioread16(port) << 16; | |
273 | *(unsigned int *)dst = w; | |
274 | dst += 4; | |
275 | } | |
276 | ||
277 | if (count) { | |
278 | *(unsigned short*)dst = ioread16(port); | |
279 | } | |
280 | } | |
281 | ||
282 | void insw(unsigned long port, void *dst, unsigned long count) | |
283 | { | |
284 | ioread16_rep(ioport_map(port, 2), dst, count); | |
285 | } | |
286 | ||
287 | EXPORT_SYMBOL(ioread16_rep); | |
288 | EXPORT_SYMBOL(insw); | |
289 | ||
290 | ||
291 | /* | |
292 | * Read COUNT 32-bit words from port PORT into memory starting at | |
293 | * SRC. Now works with any alignment in SRC. Performance is important, | |
294 | * but the interfaces seems to be slow: just using the inlined version | |
295 | * of the inl() breaks things. | |
296 | */ | |
297 | void ioread32_rep(void __iomem *port, void *dst, unsigned long count) | |
298 | { | |
299 | if (unlikely((unsigned long)dst & 0x3)) { | |
300 | while (count--) { | |
301 | struct S { int x __attribute__((packed)); }; | |
302 | ((struct S *)dst)->x = ioread32(port); | |
303 | dst += 4; | |
304 | } | |
305 | } else { | |
306 | /* Buffer 32-bit aligned. */ | |
307 | while (count--) { | |
308 | *(unsigned int *)dst = ioread32(port); | |
309 | dst += 4; | |
310 | } | |
311 | } | |
312 | } | |
313 | ||
314 | void insl(unsigned long port, void *dst, unsigned long count) | |
315 | { | |
316 | ioread32_rep(ioport_map(port, 4), dst, count); | |
317 | } | |
318 | ||
319 | EXPORT_SYMBOL(ioread32_rep); | |
320 | EXPORT_SYMBOL(insl); | |
321 | ||
322 | ||
323 | /* | |
324 | * Like insb but in the opposite direction. | |
325 | * Don't worry as much about doing aligned memory transfers: | |
326 | * doing byte reads the "slow" way isn't nearly as slow as | |
327 | * doing byte writes the slow way (no r-m-w cycle). | |
328 | */ | |
329 | void iowrite8_rep(void __iomem *port, const void *xsrc, unsigned long count) | |
330 | { | |
331 | const unsigned char *src = xsrc; | |
332 | while (count--) | |
333 | iowrite8(*src++, port); | |
334 | } | |
335 | ||
336 | void outsb(unsigned long port, const void *src, unsigned long count) | |
337 | { | |
338 | iowrite8_rep(ioport_map(port, 1), src, count); | |
339 | } | |
340 | ||
341 | EXPORT_SYMBOL(iowrite8_rep); | |
342 | EXPORT_SYMBOL(outsb); | |
343 | ||
344 | ||
345 | /* | |
346 | * Like insw but in the opposite direction. This is used by the IDE | |
347 | * driver to write disk sectors. Performance is important, but the | |
348 | * interfaces seems to be slow: just using the inlined version of the | |
349 | * outw() breaks things. | |
350 | */ | |
351 | void iowrite16_rep(void __iomem *port, const void *src, unsigned long count) | |
352 | { | |
353 | if (unlikely((unsigned long)src & 0x3)) { | |
354 | if (!count) | |
355 | return; | |
356 | BUG_ON((unsigned long)src & 0x1); | |
357 | iowrite16(*(unsigned short *)src, port); | |
358 | src += 2; | |
359 | --count; | |
360 | } | |
361 | ||
362 | while (count >= 2) { | |
363 | unsigned int w; | |
364 | count -= 2; | |
365 | w = *(unsigned int *)src; | |
366 | src += 4; | |
367 | iowrite16(w >> 0, port); | |
368 | iowrite16(w >> 16, port); | |
369 | } | |
370 | ||
371 | if (count) { | |
372 | iowrite16(*(unsigned short *)src, port); | |
373 | } | |
374 | } | |
375 | ||
376 | void outsw(unsigned long port, const void *src, unsigned long count) | |
377 | { | |
378 | iowrite16_rep(ioport_map(port, 2), src, count); | |
379 | } | |
380 | ||
381 | EXPORT_SYMBOL(iowrite16_rep); | |
382 | EXPORT_SYMBOL(outsw); | |
383 | ||
384 | ||
385 | /* | |
386 | * Like insl but in the opposite direction. This is used by the IDE | |
387 | * driver to write disk sectors. Works with any alignment in SRC. | |
388 | * Performance is important, but the interfaces seems to be slow: | |
389 | * just using the inlined version of the outl() breaks things. | |
390 | */ | |
391 | void iowrite32_rep(void __iomem *port, const void *src, unsigned long count) | |
392 | { | |
393 | if (unlikely((unsigned long)src & 0x3)) { | |
394 | while (count--) { | |
395 | struct S { int x __attribute__((packed)); }; | |
396 | iowrite32(((struct S *)src)->x, port); | |
397 | src += 4; | |
398 | } | |
399 | } else { | |
400 | /* Buffer 32-bit aligned. */ | |
401 | while (count--) { | |
402 | iowrite32(*(unsigned int *)src, port); | |
403 | src += 4; | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | void outsl(unsigned long port, const void *src, unsigned long count) | |
409 | { | |
410 | iowrite32_rep(ioport_map(port, 4), src, count); | |
411 | } | |
412 | ||
413 | EXPORT_SYMBOL(iowrite32_rep); | |
414 | EXPORT_SYMBOL(outsl); | |
415 | ||
416 | ||
417 | /* | |
418 | * Copy data from IO memory space to "real" memory space. | |
419 | * This needs to be optimized. | |
420 | */ | |
421 | void memcpy_fromio(void *to, const volatile void __iomem *from, long count) | |
422 | { | |
423 | /* Optimize co-aligned transfers. Everything else gets handled | |
424 | a byte at a time. */ | |
425 | ||
426 | if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) { | |
427 | count -= 8; | |
428 | do { | |
429 | *(u64 *)to = __raw_readq(from); | |
430 | count -= 8; | |
431 | to += 8; | |
432 | from += 8; | |
433 | } while (count >= 0); | |
434 | count += 8; | |
435 | } | |
436 | ||
437 | if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) { | |
438 | count -= 4; | |
439 | do { | |
440 | *(u32 *)to = __raw_readl(from); | |
441 | count -= 4; | |
442 | to += 4; | |
443 | from += 4; | |
444 | } while (count >= 0); | |
445 | count += 4; | |
446 | } | |
447 | ||
448 | if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) { | |
449 | count -= 2; | |
450 | do { | |
451 | *(u16 *)to = __raw_readw(from); | |
452 | count -= 2; | |
453 | to += 2; | |
454 | from += 2; | |
455 | } while (count >= 0); | |
456 | count += 2; | |
457 | } | |
458 | ||
459 | while (count > 0) { | |
460 | *(u8 *) to = __raw_readb(from); | |
461 | count--; | |
462 | to++; | |
463 | from++; | |
464 | } | |
465 | mb(); | |
466 | } | |
467 | ||
468 | EXPORT_SYMBOL(memcpy_fromio); | |
469 | ||
470 | ||
471 | /* | |
472 | * Copy data from "real" memory space to IO memory space. | |
473 | * This needs to be optimized. | |
474 | */ | |
475 | void memcpy_toio(volatile void __iomem *to, const void *from, long count) | |
476 | { | |
477 | /* Optimize co-aligned transfers. Everything else gets handled | |
478 | a byte at a time. */ | |
479 | /* FIXME -- align FROM. */ | |
480 | ||
481 | if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) { | |
482 | count -= 8; | |
483 | do { | |
484 | __raw_writeq(*(const u64 *)from, to); | |
485 | count -= 8; | |
486 | to += 8; | |
487 | from += 8; | |
488 | } while (count >= 0); | |
489 | count += 8; | |
490 | } | |
491 | ||
492 | if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) { | |
493 | count -= 4; | |
494 | do { | |
495 | __raw_writel(*(const u32 *)from, to); | |
496 | count -= 4; | |
497 | to += 4; | |
498 | from += 4; | |
499 | } while (count >= 0); | |
500 | count += 4; | |
501 | } | |
502 | ||
503 | if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) { | |
504 | count -= 2; | |
505 | do { | |
506 | __raw_writew(*(const u16 *)from, to); | |
507 | count -= 2; | |
508 | to += 2; | |
509 | from += 2; | |
510 | } while (count >= 0); | |
511 | count += 2; | |
512 | } | |
513 | ||
514 | while (count > 0) { | |
515 | __raw_writeb(*(const u8 *) from, to); | |
516 | count--; | |
517 | to++; | |
518 | from++; | |
519 | } | |
520 | mb(); | |
521 | } | |
522 | ||
523 | EXPORT_SYMBOL(memcpy_toio); | |
524 | ||
525 | ||
526 | /* | |
527 | * "memset" on IO memory space. | |
528 | */ | |
529 | void _memset_c_io(volatile void __iomem *to, unsigned long c, long count) | |
530 | { | |
531 | /* Handle any initial odd byte */ | |
532 | if (count > 0 && ((u64)to & 1)) { | |
533 | __raw_writeb(c, to); | |
534 | to++; | |
535 | count--; | |
536 | } | |
537 | ||
538 | /* Handle any initial odd halfword */ | |
539 | if (count >= 2 && ((u64)to & 2)) { | |
540 | __raw_writew(c, to); | |
541 | to += 2; | |
542 | count -= 2; | |
543 | } | |
544 | ||
545 | /* Handle any initial odd word */ | |
546 | if (count >= 4 && ((u64)to & 4)) { | |
547 | __raw_writel(c, to); | |
548 | to += 4; | |
549 | count -= 4; | |
550 | } | |
551 | ||
552 | /* Handle all full-sized quadwords: we're aligned | |
553 | (or have a small count) */ | |
554 | count -= 8; | |
555 | if (count >= 0) { | |
556 | do { | |
557 | __raw_writeq(c, to); | |
558 | to += 8; | |
559 | count -= 8; | |
560 | } while (count >= 0); | |
561 | } | |
562 | count += 8; | |
563 | ||
564 | /* The tail is word-aligned if we still have count >= 4 */ | |
565 | if (count >= 4) { | |
566 | __raw_writel(c, to); | |
567 | to += 4; | |
568 | count -= 4; | |
569 | } | |
570 | ||
571 | /* The tail is half-word aligned if we have count >= 2 */ | |
572 | if (count >= 2) { | |
573 | __raw_writew(c, to); | |
574 | to += 2; | |
575 | count -= 2; | |
576 | } | |
577 | ||
578 | /* And finally, one last byte.. */ | |
579 | if (count) { | |
580 | __raw_writeb(c, to); | |
581 | } | |
582 | mb(); | |
583 | } | |
584 | ||
585 | EXPORT_SYMBOL(_memset_c_io); | |
586 | ||
587 | /* A version of memcpy used by the vga console routines to move data around | |
588 | arbitrarily between screen and main memory. */ | |
589 | ||
590 | void | |
591 | scr_memcpyw(u16 *d, const u16 *s, unsigned int count) | |
592 | { | |
593 | const u16 __iomem *ios = (const u16 __iomem *) s; | |
594 | u16 __iomem *iod = (u16 __iomem *) d; | |
595 | int s_isio = __is_ioaddr(s); | |
596 | int d_isio = __is_ioaddr(d); | |
597 | ||
598 | if (s_isio) { | |
599 | if (d_isio) { | |
600 | /* FIXME: Should handle unaligned ops and | |
601 | operation widening. */ | |
602 | ||
603 | count /= 2; | |
604 | while (count--) { | |
605 | u16 tmp = __raw_readw(ios++); | |
606 | __raw_writew(tmp, iod++); | |
607 | } | |
608 | } | |
609 | else | |
610 | memcpy_fromio(d, ios, count); | |
611 | } else { | |
612 | if (d_isio) | |
613 | memcpy_toio(iod, s, count); | |
614 | else | |
615 | memcpy(d, s, count); | |
616 | } | |
617 | } | |
618 | ||
619 | EXPORT_SYMBOL(scr_memcpyw); | |
620 | ||
621 | void __iomem *ioport_map(unsigned long port, unsigned int size) | |
622 | { | |
623 | return IO_CONCAT(__IO_PREFIX,ioportmap) (port); | |
624 | } | |
625 | ||
626 | void ioport_unmap(void __iomem *addr) | |
627 | { | |
628 | } | |
629 | ||
630 | EXPORT_SYMBOL(ioport_map); | |
631 | EXPORT_SYMBOL(ioport_unmap); |