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1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
2 | /* Generic I/O port emulation. | |
3 | * | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
6 | */ | |
7 | #ifndef __ASM_GENERIC_IO_H | |
8 | #define __ASM_GENERIC_IO_H | |
9 | ||
10 | #include <asm/page.h> /* I/O is all done through memory accesses */ | |
11 | #include <linux/string.h> /* for memset() and memcpy() */ | |
12 | #include <linux/types.h> | |
13 | ||
14 | #ifdef CONFIG_GENERIC_IOMAP | |
15 | #include <asm-generic/iomap.h> | |
16 | #endif | |
17 | ||
18 | #include <asm/mmiowb.h> | |
19 | #include <asm-generic/pci_iomap.h> | |
20 | ||
21 | #ifndef __io_br | |
22 | #define __io_br() barrier() | |
23 | #endif | |
24 | ||
25 | /* prevent prefetching of coherent DMA data ahead of a dma-complete */ | |
26 | #ifndef __io_ar | |
27 | #ifdef rmb | |
28 | #define __io_ar(v) rmb() | |
29 | #else | |
30 | #define __io_ar(v) barrier() | |
31 | #endif | |
32 | #endif | |
33 | ||
34 | /* flush writes to coherent DMA data before possibly triggering a DMA read */ | |
35 | #ifndef __io_bw | |
36 | #ifdef wmb | |
37 | #define __io_bw() wmb() | |
38 | #else | |
39 | #define __io_bw() barrier() | |
40 | #endif | |
41 | #endif | |
42 | ||
43 | /* serialize device access against a spin_unlock, usually handled there. */ | |
44 | #ifndef __io_aw | |
45 | #define __io_aw() mmiowb_set_pending() | |
46 | #endif | |
47 | ||
48 | #ifndef __io_pbw | |
49 | #define __io_pbw() __io_bw() | |
50 | #endif | |
51 | ||
52 | #ifndef __io_paw | |
53 | #define __io_paw() __io_aw() | |
54 | #endif | |
55 | ||
56 | #ifndef __io_pbr | |
57 | #define __io_pbr() __io_br() | |
58 | #endif | |
59 | ||
60 | #ifndef __io_par | |
61 | #define __io_par(v) __io_ar(v) | |
62 | #endif | |
63 | ||
64 | ||
65 | /* | |
66 | * __raw_{read,write}{b,w,l,q}() access memory in native endianness. | |
67 | * | |
68 | * On some architectures memory mapped IO needs to be accessed differently. | |
69 | * On the simple architectures, we just read/write the memory location | |
70 | * directly. | |
71 | */ | |
72 | ||
73 | #ifndef __raw_readb | |
74 | #define __raw_readb __raw_readb | |
75 | static inline u8 __raw_readb(const volatile void __iomem *addr) | |
76 | { | |
77 | return *(const volatile u8 __force *)addr; | |
78 | } | |
79 | #endif | |
80 | ||
81 | #ifndef __raw_readw | |
82 | #define __raw_readw __raw_readw | |
83 | static inline u16 __raw_readw(const volatile void __iomem *addr) | |
84 | { | |
85 | return *(const volatile u16 __force *)addr; | |
86 | } | |
87 | #endif | |
88 | ||
89 | #ifndef __raw_readl | |
90 | #define __raw_readl __raw_readl | |
91 | static inline u32 __raw_readl(const volatile void __iomem *addr) | |
92 | { | |
93 | return *(const volatile u32 __force *)addr; | |
94 | } | |
95 | #endif | |
96 | ||
97 | #ifdef CONFIG_64BIT | |
98 | #ifndef __raw_readq | |
99 | #define __raw_readq __raw_readq | |
100 | static inline u64 __raw_readq(const volatile void __iomem *addr) | |
101 | { | |
102 | return *(const volatile u64 __force *)addr; | |
103 | } | |
104 | #endif | |
105 | #endif /* CONFIG_64BIT */ | |
106 | ||
107 | #ifndef __raw_writeb | |
108 | #define __raw_writeb __raw_writeb | |
109 | static inline void __raw_writeb(u8 value, volatile void __iomem *addr) | |
110 | { | |
111 | *(volatile u8 __force *)addr = value; | |
112 | } | |
113 | #endif | |
114 | ||
115 | #ifndef __raw_writew | |
116 | #define __raw_writew __raw_writew | |
117 | static inline void __raw_writew(u16 value, volatile void __iomem *addr) | |
118 | { | |
119 | *(volatile u16 __force *)addr = value; | |
120 | } | |
121 | #endif | |
122 | ||
123 | #ifndef __raw_writel | |
124 | #define __raw_writel __raw_writel | |
125 | static inline void __raw_writel(u32 value, volatile void __iomem *addr) | |
126 | { | |
127 | *(volatile u32 __force *)addr = value; | |
128 | } | |
129 | #endif | |
130 | ||
131 | #ifdef CONFIG_64BIT | |
132 | #ifndef __raw_writeq | |
133 | #define __raw_writeq __raw_writeq | |
134 | static inline void __raw_writeq(u64 value, volatile void __iomem *addr) | |
135 | { | |
136 | *(volatile u64 __force *)addr = value; | |
137 | } | |
138 | #endif | |
139 | #endif /* CONFIG_64BIT */ | |
140 | ||
141 | /* | |
142 | * {read,write}{b,w,l,q}() access little endian memory and return result in | |
143 | * native endianness. | |
144 | */ | |
145 | ||
146 | #ifndef readb | |
147 | #define readb readb | |
148 | static inline u8 readb(const volatile void __iomem *addr) | |
149 | { | |
150 | u8 val; | |
151 | ||
152 | __io_br(); | |
153 | val = __raw_readb(addr); | |
154 | __io_ar(val); | |
155 | return val; | |
156 | } | |
157 | #endif | |
158 | ||
159 | #ifndef readw | |
160 | #define readw readw | |
161 | static inline u16 readw(const volatile void __iomem *addr) | |
162 | { | |
163 | u16 val; | |
164 | ||
165 | __io_br(); | |
166 | val = __le16_to_cpu(__raw_readw(addr)); | |
167 | __io_ar(val); | |
168 | return val; | |
169 | } | |
170 | #endif | |
171 | ||
172 | #ifndef readl | |
173 | #define readl readl | |
174 | static inline u32 readl(const volatile void __iomem *addr) | |
175 | { | |
176 | u32 val; | |
177 | ||
178 | __io_br(); | |
179 | val = __le32_to_cpu(__raw_readl(addr)); | |
180 | __io_ar(val); | |
181 | return val; | |
182 | } | |
183 | #endif | |
184 | ||
185 | #ifdef CONFIG_64BIT | |
186 | #ifndef readq | |
187 | #define readq readq | |
188 | static inline u64 readq(const volatile void __iomem *addr) | |
189 | { | |
190 | u64 val; | |
191 | ||
192 | __io_br(); | |
193 | val = __le64_to_cpu(__raw_readq(addr)); | |
194 | __io_ar(val); | |
195 | return val; | |
196 | } | |
197 | #endif | |
198 | #endif /* CONFIG_64BIT */ | |
199 | ||
200 | #ifndef writeb | |
201 | #define writeb writeb | |
202 | static inline void writeb(u8 value, volatile void __iomem *addr) | |
203 | { | |
204 | __io_bw(); | |
205 | __raw_writeb(value, addr); | |
206 | __io_aw(); | |
207 | } | |
208 | #endif | |
209 | ||
210 | #ifndef writew | |
211 | #define writew writew | |
212 | static inline void writew(u16 value, volatile void __iomem *addr) | |
213 | { | |
214 | __io_bw(); | |
215 | __raw_writew(cpu_to_le16(value), addr); | |
216 | __io_aw(); | |
217 | } | |
218 | #endif | |
219 | ||
220 | #ifndef writel | |
221 | #define writel writel | |
222 | static inline void writel(u32 value, volatile void __iomem *addr) | |
223 | { | |
224 | __io_bw(); | |
225 | __raw_writel(__cpu_to_le32(value), addr); | |
226 | __io_aw(); | |
227 | } | |
228 | #endif | |
229 | ||
230 | #ifdef CONFIG_64BIT | |
231 | #ifndef writeq | |
232 | #define writeq writeq | |
233 | static inline void writeq(u64 value, volatile void __iomem *addr) | |
234 | { | |
235 | __io_bw(); | |
236 | __raw_writeq(__cpu_to_le64(value), addr); | |
237 | __io_aw(); | |
238 | } | |
239 | #endif | |
240 | #endif /* CONFIG_64BIT */ | |
241 | ||
242 | /* | |
243 | * {read,write}{b,w,l,q}_relaxed() are like the regular version, but | |
244 | * are not guaranteed to provide ordering against spinlocks or memory | |
245 | * accesses. | |
246 | */ | |
247 | #ifndef readb_relaxed | |
248 | #define readb_relaxed readb_relaxed | |
249 | static inline u8 readb_relaxed(const volatile void __iomem *addr) | |
250 | { | |
251 | return __raw_readb(addr); | |
252 | } | |
253 | #endif | |
254 | ||
255 | #ifndef readw_relaxed | |
256 | #define readw_relaxed readw_relaxed | |
257 | static inline u16 readw_relaxed(const volatile void __iomem *addr) | |
258 | { | |
259 | return __le16_to_cpu(__raw_readw(addr)); | |
260 | } | |
261 | #endif | |
262 | ||
263 | #ifndef readl_relaxed | |
264 | #define readl_relaxed readl_relaxed | |
265 | static inline u32 readl_relaxed(const volatile void __iomem *addr) | |
266 | { | |
267 | return __le32_to_cpu(__raw_readl(addr)); | |
268 | } | |
269 | #endif | |
270 | ||
271 | #if defined(readq) && !defined(readq_relaxed) | |
272 | #define readq_relaxed readq_relaxed | |
273 | static inline u64 readq_relaxed(const volatile void __iomem *addr) | |
274 | { | |
275 | return __le64_to_cpu(__raw_readq(addr)); | |
276 | } | |
277 | #endif | |
278 | ||
279 | #ifndef writeb_relaxed | |
280 | #define writeb_relaxed writeb_relaxed | |
281 | static inline void writeb_relaxed(u8 value, volatile void __iomem *addr) | |
282 | { | |
283 | __raw_writeb(value, addr); | |
284 | } | |
285 | #endif | |
286 | ||
287 | #ifndef writew_relaxed | |
288 | #define writew_relaxed writew_relaxed | |
289 | static inline void writew_relaxed(u16 value, volatile void __iomem *addr) | |
290 | { | |
291 | __raw_writew(cpu_to_le16(value), addr); | |
292 | } | |
293 | #endif | |
294 | ||
295 | #ifndef writel_relaxed | |
296 | #define writel_relaxed writel_relaxed | |
297 | static inline void writel_relaxed(u32 value, volatile void __iomem *addr) | |
298 | { | |
299 | __raw_writel(__cpu_to_le32(value), addr); | |
300 | } | |
301 | #endif | |
302 | ||
303 | #if defined(writeq) && !defined(writeq_relaxed) | |
304 | #define writeq_relaxed writeq_relaxed | |
305 | static inline void writeq_relaxed(u64 value, volatile void __iomem *addr) | |
306 | { | |
307 | __raw_writeq(__cpu_to_le64(value), addr); | |
308 | } | |
309 | #endif | |
310 | ||
311 | /* | |
312 | * {read,write}s{b,w,l,q}() repeatedly access the same memory address in | |
313 | * native endianness in 8-, 16-, 32- or 64-bit chunks (@count times). | |
314 | */ | |
315 | #ifndef readsb | |
316 | #define readsb readsb | |
317 | static inline void readsb(const volatile void __iomem *addr, void *buffer, | |
318 | unsigned int count) | |
319 | { | |
320 | if (count) { | |
321 | u8 *buf = buffer; | |
322 | ||
323 | do { | |
324 | u8 x = __raw_readb(addr); | |
325 | *buf++ = x; | |
326 | } while (--count); | |
327 | } | |
328 | } | |
329 | #endif | |
330 | ||
331 | #ifndef readsw | |
332 | #define readsw readsw | |
333 | static inline void readsw(const volatile void __iomem *addr, void *buffer, | |
334 | unsigned int count) | |
335 | { | |
336 | if (count) { | |
337 | u16 *buf = buffer; | |
338 | ||
339 | do { | |
340 | u16 x = __raw_readw(addr); | |
341 | *buf++ = x; | |
342 | } while (--count); | |
343 | } | |
344 | } | |
345 | #endif | |
346 | ||
347 | #ifndef readsl | |
348 | #define readsl readsl | |
349 | static inline void readsl(const volatile void __iomem *addr, void *buffer, | |
350 | unsigned int count) | |
351 | { | |
352 | if (count) { | |
353 | u32 *buf = buffer; | |
354 | ||
355 | do { | |
356 | u32 x = __raw_readl(addr); | |
357 | *buf++ = x; | |
358 | } while (--count); | |
359 | } | |
360 | } | |
361 | #endif | |
362 | ||
363 | #ifdef CONFIG_64BIT | |
364 | #ifndef readsq | |
365 | #define readsq readsq | |
366 | static inline void readsq(const volatile void __iomem *addr, void *buffer, | |
367 | unsigned int count) | |
368 | { | |
369 | if (count) { | |
370 | u64 *buf = buffer; | |
371 | ||
372 | do { | |
373 | u64 x = __raw_readq(addr); | |
374 | *buf++ = x; | |
375 | } while (--count); | |
376 | } | |
377 | } | |
378 | #endif | |
379 | #endif /* CONFIG_64BIT */ | |
380 | ||
381 | #ifndef writesb | |
382 | #define writesb writesb | |
383 | static inline void writesb(volatile void __iomem *addr, const void *buffer, | |
384 | unsigned int count) | |
385 | { | |
386 | if (count) { | |
387 | const u8 *buf = buffer; | |
388 | ||
389 | do { | |
390 | __raw_writeb(*buf++, addr); | |
391 | } while (--count); | |
392 | } | |
393 | } | |
394 | #endif | |
395 | ||
396 | #ifndef writesw | |
397 | #define writesw writesw | |
398 | static inline void writesw(volatile void __iomem *addr, const void *buffer, | |
399 | unsigned int count) | |
400 | { | |
401 | if (count) { | |
402 | const u16 *buf = buffer; | |
403 | ||
404 | do { | |
405 | __raw_writew(*buf++, addr); | |
406 | } while (--count); | |
407 | } | |
408 | } | |
409 | #endif | |
410 | ||
411 | #ifndef writesl | |
412 | #define writesl writesl | |
413 | static inline void writesl(volatile void __iomem *addr, const void *buffer, | |
414 | unsigned int count) | |
415 | { | |
416 | if (count) { | |
417 | const u32 *buf = buffer; | |
418 | ||
419 | do { | |
420 | __raw_writel(*buf++, addr); | |
421 | } while (--count); | |
422 | } | |
423 | } | |
424 | #endif | |
425 | ||
426 | #ifdef CONFIG_64BIT | |
427 | #ifndef writesq | |
428 | #define writesq writesq | |
429 | static inline void writesq(volatile void __iomem *addr, const void *buffer, | |
430 | unsigned int count) | |
431 | { | |
432 | if (count) { | |
433 | const u64 *buf = buffer; | |
434 | ||
435 | do { | |
436 | __raw_writeq(*buf++, addr); | |
437 | } while (--count); | |
438 | } | |
439 | } | |
440 | #endif | |
441 | #endif /* CONFIG_64BIT */ | |
442 | ||
443 | #ifndef PCI_IOBASE | |
444 | #define PCI_IOBASE ((void __iomem *)0) | |
445 | #endif | |
446 | ||
447 | #ifndef IO_SPACE_LIMIT | |
448 | #define IO_SPACE_LIMIT 0xffff | |
449 | #endif | |
450 | ||
451 | #include <linux/logic_pio.h> | |
452 | ||
453 | /* | |
454 | * {in,out}{b,w,l}() access little endian I/O. {in,out}{b,w,l}_p() can be | |
455 | * implemented on hardware that needs an additional delay for I/O accesses to | |
456 | * take effect. | |
457 | */ | |
458 | ||
459 | #ifndef inb | |
460 | #define inb inb | |
461 | static inline u8 inb(unsigned long addr) | |
462 | { | |
463 | u8 val; | |
464 | ||
465 | __io_pbr(); | |
466 | val = __raw_readb(PCI_IOBASE + addr); | |
467 | __io_par(val); | |
468 | return val; | |
469 | } | |
470 | #endif | |
471 | ||
472 | #ifndef inw | |
473 | #define inw inw | |
474 | static inline u16 inw(unsigned long addr) | |
475 | { | |
476 | u16 val; | |
477 | ||
478 | __io_pbr(); | |
479 | val = __le16_to_cpu(__raw_readw(PCI_IOBASE + addr)); | |
480 | __io_par(val); | |
481 | return val; | |
482 | } | |
483 | #endif | |
484 | ||
485 | #ifndef inl | |
486 | #define inl inl | |
487 | static inline u32 inl(unsigned long addr) | |
488 | { | |
489 | u32 val; | |
490 | ||
491 | __io_pbr(); | |
492 | val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); | |
493 | __io_par(val); | |
494 | return val; | |
495 | } | |
496 | #endif | |
497 | ||
498 | #ifndef outb | |
499 | #define outb outb | |
500 | static inline void outb(u8 value, unsigned long addr) | |
501 | { | |
502 | __io_pbw(); | |
503 | __raw_writeb(value, PCI_IOBASE + addr); | |
504 | __io_paw(); | |
505 | } | |
506 | #endif | |
507 | ||
508 | #ifndef outw | |
509 | #define outw outw | |
510 | static inline void outw(u16 value, unsigned long addr) | |
511 | { | |
512 | __io_pbw(); | |
513 | __raw_writew(cpu_to_le16(value), PCI_IOBASE + addr); | |
514 | __io_paw(); | |
515 | } | |
516 | #endif | |
517 | ||
518 | #ifndef outl | |
519 | #define outl outl | |
520 | static inline void outl(u32 value, unsigned long addr) | |
521 | { | |
522 | __io_pbw(); | |
523 | __raw_writel(cpu_to_le32(value), PCI_IOBASE + addr); | |
524 | __io_paw(); | |
525 | } | |
526 | #endif | |
527 | ||
528 | #ifndef inb_p | |
529 | #define inb_p inb_p | |
530 | static inline u8 inb_p(unsigned long addr) | |
531 | { | |
532 | return inb(addr); | |
533 | } | |
534 | #endif | |
535 | ||
536 | #ifndef inw_p | |
537 | #define inw_p inw_p | |
538 | static inline u16 inw_p(unsigned long addr) | |
539 | { | |
540 | return inw(addr); | |
541 | } | |
542 | #endif | |
543 | ||
544 | #ifndef inl_p | |
545 | #define inl_p inl_p | |
546 | static inline u32 inl_p(unsigned long addr) | |
547 | { | |
548 | return inl(addr); | |
549 | } | |
550 | #endif | |
551 | ||
552 | #ifndef outb_p | |
553 | #define outb_p outb_p | |
554 | static inline void outb_p(u8 value, unsigned long addr) | |
555 | { | |
556 | outb(value, addr); | |
557 | } | |
558 | #endif | |
559 | ||
560 | #ifndef outw_p | |
561 | #define outw_p outw_p | |
562 | static inline void outw_p(u16 value, unsigned long addr) | |
563 | { | |
564 | outw(value, addr); | |
565 | } | |
566 | #endif | |
567 | ||
568 | #ifndef outl_p | |
569 | #define outl_p outl_p | |
570 | static inline void outl_p(u32 value, unsigned long addr) | |
571 | { | |
572 | outl(value, addr); | |
573 | } | |
574 | #endif | |
575 | ||
576 | /* | |
577 | * {in,out}s{b,w,l}{,_p}() are variants of the above that repeatedly access a | |
578 | * single I/O port multiple times. | |
579 | */ | |
580 | ||
581 | #ifndef insb | |
582 | #define insb insb | |
583 | static inline void insb(unsigned long addr, void *buffer, unsigned int count) | |
584 | { | |
585 | readsb(PCI_IOBASE + addr, buffer, count); | |
586 | } | |
587 | #endif | |
588 | ||
589 | #ifndef insw | |
590 | #define insw insw | |
591 | static inline void insw(unsigned long addr, void *buffer, unsigned int count) | |
592 | { | |
593 | readsw(PCI_IOBASE + addr, buffer, count); | |
594 | } | |
595 | #endif | |
596 | ||
597 | #ifndef insl | |
598 | #define insl insl | |
599 | static inline void insl(unsigned long addr, void *buffer, unsigned int count) | |
600 | { | |
601 | readsl(PCI_IOBASE + addr, buffer, count); | |
602 | } | |
603 | #endif | |
604 | ||
605 | #ifndef outsb | |
606 | #define outsb outsb | |
607 | static inline void outsb(unsigned long addr, const void *buffer, | |
608 | unsigned int count) | |
609 | { | |
610 | writesb(PCI_IOBASE + addr, buffer, count); | |
611 | } | |
612 | #endif | |
613 | ||
614 | #ifndef outsw | |
615 | #define outsw outsw | |
616 | static inline void outsw(unsigned long addr, const void *buffer, | |
617 | unsigned int count) | |
618 | { | |
619 | writesw(PCI_IOBASE + addr, buffer, count); | |
620 | } | |
621 | #endif | |
622 | ||
623 | #ifndef outsl | |
624 | #define outsl outsl | |
625 | static inline void outsl(unsigned long addr, const void *buffer, | |
626 | unsigned int count) | |
627 | { | |
628 | writesl(PCI_IOBASE + addr, buffer, count); | |
629 | } | |
630 | #endif | |
631 | ||
632 | #ifndef insb_p | |
633 | #define insb_p insb_p | |
634 | static inline void insb_p(unsigned long addr, void *buffer, unsigned int count) | |
635 | { | |
636 | insb(addr, buffer, count); | |
637 | } | |
638 | #endif | |
639 | ||
640 | #ifndef insw_p | |
641 | #define insw_p insw_p | |
642 | static inline void insw_p(unsigned long addr, void *buffer, unsigned int count) | |
643 | { | |
644 | insw(addr, buffer, count); | |
645 | } | |
646 | #endif | |
647 | ||
648 | #ifndef insl_p | |
649 | #define insl_p insl_p | |
650 | static inline void insl_p(unsigned long addr, void *buffer, unsigned int count) | |
651 | { | |
652 | insl(addr, buffer, count); | |
653 | } | |
654 | #endif | |
655 | ||
656 | #ifndef outsb_p | |
657 | #define outsb_p outsb_p | |
658 | static inline void outsb_p(unsigned long addr, const void *buffer, | |
659 | unsigned int count) | |
660 | { | |
661 | outsb(addr, buffer, count); | |
662 | } | |
663 | #endif | |
664 | ||
665 | #ifndef outsw_p | |
666 | #define outsw_p outsw_p | |
667 | static inline void outsw_p(unsigned long addr, const void *buffer, | |
668 | unsigned int count) | |
669 | { | |
670 | outsw(addr, buffer, count); | |
671 | } | |
672 | #endif | |
673 | ||
674 | #ifndef outsl_p | |
675 | #define outsl_p outsl_p | |
676 | static inline void outsl_p(unsigned long addr, const void *buffer, | |
677 | unsigned int count) | |
678 | { | |
679 | outsl(addr, buffer, count); | |
680 | } | |
681 | #endif | |
682 | ||
683 | #ifndef CONFIG_GENERIC_IOMAP | |
684 | #ifndef ioread8 | |
685 | #define ioread8 ioread8 | |
686 | static inline u8 ioread8(const volatile void __iomem *addr) | |
687 | { | |
688 | return readb(addr); | |
689 | } | |
690 | #endif | |
691 | ||
692 | #ifndef ioread16 | |
693 | #define ioread16 ioread16 | |
694 | static inline u16 ioread16(const volatile void __iomem *addr) | |
695 | { | |
696 | return readw(addr); | |
697 | } | |
698 | #endif | |
699 | ||
700 | #ifndef ioread32 | |
701 | #define ioread32 ioread32 | |
702 | static inline u32 ioread32(const volatile void __iomem *addr) | |
703 | { | |
704 | return readl(addr); | |
705 | } | |
706 | #endif | |
707 | ||
708 | #ifdef CONFIG_64BIT | |
709 | #ifndef ioread64 | |
710 | #define ioread64 ioread64 | |
711 | static inline u64 ioread64(const volatile void __iomem *addr) | |
712 | { | |
713 | return readq(addr); | |
714 | } | |
715 | #endif | |
716 | #endif /* CONFIG_64BIT */ | |
717 | ||
718 | #ifndef iowrite8 | |
719 | #define iowrite8 iowrite8 | |
720 | static inline void iowrite8(u8 value, volatile void __iomem *addr) | |
721 | { | |
722 | writeb(value, addr); | |
723 | } | |
724 | #endif | |
725 | ||
726 | #ifndef iowrite16 | |
727 | #define iowrite16 iowrite16 | |
728 | static inline void iowrite16(u16 value, volatile void __iomem *addr) | |
729 | { | |
730 | writew(value, addr); | |
731 | } | |
732 | #endif | |
733 | ||
734 | #ifndef iowrite32 | |
735 | #define iowrite32 iowrite32 | |
736 | static inline void iowrite32(u32 value, volatile void __iomem *addr) | |
737 | { | |
738 | writel(value, addr); | |
739 | } | |
740 | #endif | |
741 | ||
742 | #ifdef CONFIG_64BIT | |
743 | #ifndef iowrite64 | |
744 | #define iowrite64 iowrite64 | |
745 | static inline void iowrite64(u64 value, volatile void __iomem *addr) | |
746 | { | |
747 | writeq(value, addr); | |
748 | } | |
749 | #endif | |
750 | #endif /* CONFIG_64BIT */ | |
751 | ||
752 | #ifndef ioread16be | |
753 | #define ioread16be ioread16be | |
754 | static inline u16 ioread16be(const volatile void __iomem *addr) | |
755 | { | |
756 | return swab16(readw(addr)); | |
757 | } | |
758 | #endif | |
759 | ||
760 | #ifndef ioread32be | |
761 | #define ioread32be ioread32be | |
762 | static inline u32 ioread32be(const volatile void __iomem *addr) | |
763 | { | |
764 | return swab32(readl(addr)); | |
765 | } | |
766 | #endif | |
767 | ||
768 | #ifdef CONFIG_64BIT | |
769 | #ifndef ioread64be | |
770 | #define ioread64be ioread64be | |
771 | static inline u64 ioread64be(const volatile void __iomem *addr) | |
772 | { | |
773 | return swab64(readq(addr)); | |
774 | } | |
775 | #endif | |
776 | #endif /* CONFIG_64BIT */ | |
777 | ||
778 | #ifndef iowrite16be | |
779 | #define iowrite16be iowrite16be | |
780 | static inline void iowrite16be(u16 value, void volatile __iomem *addr) | |
781 | { | |
782 | writew(swab16(value), addr); | |
783 | } | |
784 | #endif | |
785 | ||
786 | #ifndef iowrite32be | |
787 | #define iowrite32be iowrite32be | |
788 | static inline void iowrite32be(u32 value, volatile void __iomem *addr) | |
789 | { | |
790 | writel(swab32(value), addr); | |
791 | } | |
792 | #endif | |
793 | ||
794 | #ifdef CONFIG_64BIT | |
795 | #ifndef iowrite64be | |
796 | #define iowrite64be iowrite64be | |
797 | static inline void iowrite64be(u64 value, volatile void __iomem *addr) | |
798 | { | |
799 | writeq(swab64(value), addr); | |
800 | } | |
801 | #endif | |
802 | #endif /* CONFIG_64BIT */ | |
803 | ||
804 | #ifndef ioread8_rep | |
805 | #define ioread8_rep ioread8_rep | |
806 | static inline void ioread8_rep(const volatile void __iomem *addr, void *buffer, | |
807 | unsigned int count) | |
808 | { | |
809 | readsb(addr, buffer, count); | |
810 | } | |
811 | #endif | |
812 | ||
813 | #ifndef ioread16_rep | |
814 | #define ioread16_rep ioread16_rep | |
815 | static inline void ioread16_rep(const volatile void __iomem *addr, | |
816 | void *buffer, unsigned int count) | |
817 | { | |
818 | readsw(addr, buffer, count); | |
819 | } | |
820 | #endif | |
821 | ||
822 | #ifndef ioread32_rep | |
823 | #define ioread32_rep ioread32_rep | |
824 | static inline void ioread32_rep(const volatile void __iomem *addr, | |
825 | void *buffer, unsigned int count) | |
826 | { | |
827 | readsl(addr, buffer, count); | |
828 | } | |
829 | #endif | |
830 | ||
831 | #ifdef CONFIG_64BIT | |
832 | #ifndef ioread64_rep | |
833 | #define ioread64_rep ioread64_rep | |
834 | static inline void ioread64_rep(const volatile void __iomem *addr, | |
835 | void *buffer, unsigned int count) | |
836 | { | |
837 | readsq(addr, buffer, count); | |
838 | } | |
839 | #endif | |
840 | #endif /* CONFIG_64BIT */ | |
841 | ||
842 | #ifndef iowrite8_rep | |
843 | #define iowrite8_rep iowrite8_rep | |
844 | static inline void iowrite8_rep(volatile void __iomem *addr, | |
845 | const void *buffer, | |
846 | unsigned int count) | |
847 | { | |
848 | writesb(addr, buffer, count); | |
849 | } | |
850 | #endif | |
851 | ||
852 | #ifndef iowrite16_rep | |
853 | #define iowrite16_rep iowrite16_rep | |
854 | static inline void iowrite16_rep(volatile void __iomem *addr, | |
855 | const void *buffer, | |
856 | unsigned int count) | |
857 | { | |
858 | writesw(addr, buffer, count); | |
859 | } | |
860 | #endif | |
861 | ||
862 | #ifndef iowrite32_rep | |
863 | #define iowrite32_rep iowrite32_rep | |
864 | static inline void iowrite32_rep(volatile void __iomem *addr, | |
865 | const void *buffer, | |
866 | unsigned int count) | |
867 | { | |
868 | writesl(addr, buffer, count); | |
869 | } | |
870 | #endif | |
871 | ||
872 | #ifdef CONFIG_64BIT | |
873 | #ifndef iowrite64_rep | |
874 | #define iowrite64_rep iowrite64_rep | |
875 | static inline void iowrite64_rep(volatile void __iomem *addr, | |
876 | const void *buffer, | |
877 | unsigned int count) | |
878 | { | |
879 | writesq(addr, buffer, count); | |
880 | } | |
881 | #endif | |
882 | #endif /* CONFIG_64BIT */ | |
883 | #endif /* CONFIG_GENERIC_IOMAP */ | |
884 | ||
885 | #ifdef __KERNEL__ | |
886 | ||
887 | #include <linux/vmalloc.h> | |
888 | #define __io_virt(x) ((void __force *)(x)) | |
889 | ||
890 | #ifndef CONFIG_GENERIC_IOMAP | |
891 | struct pci_dev; | |
892 | extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); | |
893 | ||
894 | #ifndef pci_iounmap | |
895 | #define pci_iounmap pci_iounmap | |
896 | static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p) | |
897 | { | |
898 | } | |
899 | #endif | |
900 | #endif /* CONFIG_GENERIC_IOMAP */ | |
901 | ||
902 | /* | |
903 | * Change virtual addresses to physical addresses and vv. | |
904 | * These are pretty trivial | |
905 | */ | |
906 | #ifndef virt_to_phys | |
907 | #define virt_to_phys virt_to_phys | |
908 | static inline unsigned long virt_to_phys(volatile void *address) | |
909 | { | |
910 | return __pa((unsigned long)address); | |
911 | } | |
912 | #endif | |
913 | ||
914 | #ifndef phys_to_virt | |
915 | #define phys_to_virt phys_to_virt | |
916 | static inline void *phys_to_virt(unsigned long address) | |
917 | { | |
918 | return __va(address); | |
919 | } | |
920 | #endif | |
921 | ||
922 | /** | |
923 | * DOC: ioremap() and ioremap_*() variants | |
924 | * | |
925 | * If you have an IOMMU your architecture is expected to have both ioremap() | |
926 | * and iounmap() implemented otherwise the asm-generic helpers will provide a | |
927 | * direct mapping. | |
928 | * | |
929 | * There are ioremap_*() call variants, if you have no IOMMU we naturally will | |
930 | * default to direct mapping for all of them, you can override these defaults. | |
931 | * If you have an IOMMU you are highly encouraged to provide your own | |
932 | * ioremap variant implementation as there currently is no safe architecture | |
933 | * agnostic default. To avoid possible improper behaviour default asm-generic | |
934 | * ioremap_*() variants all return NULL when an IOMMU is available. If you've | |
935 | * defined your own ioremap_*() variant you must then declare your own | |
936 | * ioremap_*() variant as defined to itself to avoid the default NULL return. | |
937 | */ | |
938 | ||
939 | #ifdef CONFIG_MMU | |
940 | ||
941 | #ifndef ioremap_uc | |
942 | #define ioremap_uc ioremap_uc | |
943 | static inline void __iomem *ioremap_uc(phys_addr_t offset, size_t size) | |
944 | { | |
945 | return NULL; | |
946 | } | |
947 | #endif | |
948 | ||
949 | #else /* !CONFIG_MMU */ | |
950 | ||
951 | /* | |
952 | * Change "struct page" to physical address. | |
953 | * | |
954 | * This implementation is for the no-MMU case only... if you have an MMU | |
955 | * you'll need to provide your own definitions. | |
956 | */ | |
957 | ||
958 | #ifndef ioremap | |
959 | #define ioremap ioremap | |
960 | static inline void __iomem *ioremap(phys_addr_t offset, size_t size) | |
961 | { | |
962 | return (void __iomem *)(unsigned long)offset; | |
963 | } | |
964 | #endif | |
965 | ||
966 | #ifndef iounmap | |
967 | #define iounmap iounmap | |
968 | ||
969 | static inline void iounmap(void __iomem *addr) | |
970 | { | |
971 | } | |
972 | #endif | |
973 | #endif /* CONFIG_MMU */ | |
974 | #ifndef ioremap_nocache | |
975 | void __iomem *ioremap(phys_addr_t phys_addr, size_t size); | |
976 | #define ioremap_nocache ioremap_nocache | |
977 | static inline void __iomem *ioremap_nocache(phys_addr_t offset, size_t size) | |
978 | { | |
979 | return ioremap(offset, size); | |
980 | } | |
981 | #endif | |
982 | ||
983 | #ifndef ioremap_uc | |
984 | #define ioremap_uc ioremap_uc | |
985 | static inline void __iomem *ioremap_uc(phys_addr_t offset, size_t size) | |
986 | { | |
987 | return ioremap_nocache(offset, size); | |
988 | } | |
989 | #endif | |
990 | ||
991 | #ifndef ioremap_wc | |
992 | #define ioremap_wc ioremap_wc | |
993 | static inline void __iomem *ioremap_wc(phys_addr_t offset, size_t size) | |
994 | { | |
995 | return ioremap_nocache(offset, size); | |
996 | } | |
997 | #endif | |
998 | ||
999 | #ifndef ioremap_wt | |
1000 | #define ioremap_wt ioremap_wt | |
1001 | static inline void __iomem *ioremap_wt(phys_addr_t offset, size_t size) | |
1002 | { | |
1003 | return ioremap_nocache(offset, size); | |
1004 | } | |
1005 | #endif | |
1006 | ||
1007 | #ifdef CONFIG_HAS_IOPORT_MAP | |
1008 | #ifndef CONFIG_GENERIC_IOMAP | |
1009 | #ifndef ioport_map | |
1010 | #define ioport_map ioport_map | |
1011 | static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) | |
1012 | { | |
1013 | port &= IO_SPACE_LIMIT; | |
1014 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; | |
1015 | } | |
1016 | #endif | |
1017 | ||
1018 | #ifndef ioport_unmap | |
1019 | #define ioport_unmap ioport_unmap | |
1020 | static inline void ioport_unmap(void __iomem *p) | |
1021 | { | |
1022 | } | |
1023 | #endif | |
1024 | #else /* CONFIG_GENERIC_IOMAP */ | |
1025 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); | |
1026 | extern void ioport_unmap(void __iomem *p); | |
1027 | #endif /* CONFIG_GENERIC_IOMAP */ | |
1028 | #endif /* CONFIG_HAS_IOPORT_MAP */ | |
1029 | ||
1030 | /* | |
1031 | * Convert a virtual cached pointer to an uncached pointer | |
1032 | */ | |
1033 | #ifndef xlate_dev_kmem_ptr | |
1034 | #define xlate_dev_kmem_ptr xlate_dev_kmem_ptr | |
1035 | static inline void *xlate_dev_kmem_ptr(void *addr) | |
1036 | { | |
1037 | return addr; | |
1038 | } | |
1039 | #endif | |
1040 | ||
1041 | #ifndef xlate_dev_mem_ptr | |
1042 | #define xlate_dev_mem_ptr xlate_dev_mem_ptr | |
1043 | static inline void *xlate_dev_mem_ptr(phys_addr_t addr) | |
1044 | { | |
1045 | return __va(addr); | |
1046 | } | |
1047 | #endif | |
1048 | ||
1049 | #ifndef unxlate_dev_mem_ptr | |
1050 | #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr | |
1051 | static inline void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr) | |
1052 | { | |
1053 | } | |
1054 | #endif | |
1055 | ||
1056 | #ifdef CONFIG_VIRT_TO_BUS | |
1057 | #ifndef virt_to_bus | |
1058 | static inline unsigned long virt_to_bus(void *address) | |
1059 | { | |
1060 | return (unsigned long)address; | |
1061 | } | |
1062 | ||
1063 | static inline void *bus_to_virt(unsigned long address) | |
1064 | { | |
1065 | return (void *)address; | |
1066 | } | |
1067 | #endif | |
1068 | #endif | |
1069 | ||
1070 | #ifndef memset_io | |
1071 | #define memset_io memset_io | |
1072 | /** | |
1073 | * memset_io Set a range of I/O memory to a constant value | |
1074 | * @addr: The beginning of the I/O-memory range to set | |
1075 | * @val: The value to set the memory to | |
1076 | * @count: The number of bytes to set | |
1077 | * | |
1078 | * Set a range of I/O memory to a given value. | |
1079 | */ | |
1080 | static inline void memset_io(volatile void __iomem *addr, int value, | |
1081 | size_t size) | |
1082 | { | |
1083 | memset(__io_virt(addr), value, size); | |
1084 | } | |
1085 | #endif | |
1086 | ||
1087 | #ifndef memcpy_fromio | |
1088 | #define memcpy_fromio memcpy_fromio | |
1089 | /** | |
1090 | * memcpy_fromio Copy a block of data from I/O memory | |
1091 | * @dst: The (RAM) destination for the copy | |
1092 | * @src: The (I/O memory) source for the data | |
1093 | * @count: The number of bytes to copy | |
1094 | * | |
1095 | * Copy a block of data from I/O memory. | |
1096 | */ | |
1097 | static inline void memcpy_fromio(void *buffer, | |
1098 | const volatile void __iomem *addr, | |
1099 | size_t size) | |
1100 | { | |
1101 | memcpy(buffer, __io_virt(addr), size); | |
1102 | } | |
1103 | #endif | |
1104 | ||
1105 | #ifndef memcpy_toio | |
1106 | #define memcpy_toio memcpy_toio | |
1107 | /** | |
1108 | * memcpy_toio Copy a block of data into I/O memory | |
1109 | * @dst: The (I/O memory) destination for the copy | |
1110 | * @src: The (RAM) source for the data | |
1111 | * @count: The number of bytes to copy | |
1112 | * | |
1113 | * Copy a block of data to I/O memory. | |
1114 | */ | |
1115 | static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer, | |
1116 | size_t size) | |
1117 | { | |
1118 | memcpy(__io_virt(addr), buffer, size); | |
1119 | } | |
1120 | #endif | |
1121 | ||
1122 | #endif /* __KERNEL__ */ | |
1123 | ||
1124 | #endif /* __ASM_GENERIC_IO_H */ |