Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * iomap.c - Implement iomap interface for PA-RISC | |
3 | * Copyright (c) 2004 Matthew Wilcox | |
4 | */ | |
5 | ||
6 | #include <linux/ioport.h> | |
7 | #include <linux/pci.h> | |
a87df54e | 8 | #include <linux/export.h> |
1da177e4 LT |
9 | #include <asm/io.h> |
10 | ||
11 | /* | |
12 | * The iomap space on 32-bit PA-RISC is intended to look like this: | |
13 | * 00000000-7fffffff virtual mapped IO | |
14 | * 80000000-8fffffff ISA/EISA port space that can't be virtually mapped | |
15 | * 90000000-9fffffff Dino port space | |
16 | * a0000000-afffffff Astro port space | |
17 | * b0000000-bfffffff PAT port space | |
18 | * c0000000-cfffffff non-swapped memory IO | |
19 | * f0000000-ffffffff legacy IO memory pointers | |
20 | * | |
21 | * For the moment, here's what it looks like: | |
22 | * 80000000-8fffffff All ISA/EISA port space | |
23 | * f0000000-ffffffff legacy IO memory pointers | |
24 | * | |
25 | * On 64-bit, everything is extended, so: | |
26 | * 8000000000000000-8fffffffffffffff All ISA/EISA port space | |
27 | * f000000000000000-ffffffffffffffff legacy IO memory pointers | |
28 | */ | |
29 | ||
30 | /* | |
31 | * Technically, this should be 'if (VMALLOC_START < addr < VMALLOC_END), | |
32 | * but that's slow and we know it'll be within the first 2GB. | |
33 | */ | |
34 | #ifdef CONFIG_64BIT | |
35 | #define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<63) != 0) | |
36 | #define ADDR_TO_REGION(addr) (((unsigned long)addr >> 60) & 7) | |
37 | #define IOPORT_MAP_BASE (8UL << 60) | |
38 | #else | |
39 | #define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<31) != 0) | |
40 | #define ADDR_TO_REGION(addr) (((unsigned long)addr >> 28) & 7) | |
41 | #define IOPORT_MAP_BASE (8UL << 28) | |
42 | #endif | |
43 | ||
44 | struct iomap_ops { | |
45 | unsigned int (*read8)(void __iomem *); | |
46 | unsigned int (*read16)(void __iomem *); | |
dae409a2 | 47 | unsigned int (*read16be)(void __iomem *); |
1da177e4 | 48 | unsigned int (*read32)(void __iomem *); |
dae409a2 | 49 | unsigned int (*read32be)(void __iomem *); |
1da177e4 LT |
50 | void (*write8)(u8, void __iomem *); |
51 | void (*write16)(u16, void __iomem *); | |
dae409a2 | 52 | void (*write16be)(u16, void __iomem *); |
1da177e4 | 53 | void (*write32)(u32, void __iomem *); |
dae409a2 | 54 | void (*write32be)(u32, void __iomem *); |
1da177e4 LT |
55 | void (*read8r)(void __iomem *, void *, unsigned long); |
56 | void (*read16r)(void __iomem *, void *, unsigned long); | |
57 | void (*read32r)(void __iomem *, void *, unsigned long); | |
58 | void (*write8r)(void __iomem *, const void *, unsigned long); | |
59 | void (*write16r)(void __iomem *, const void *, unsigned long); | |
60 | void (*write32r)(void __iomem *, const void *, unsigned long); | |
61 | }; | |
62 | ||
63 | /* Generic ioport ops. To be replaced later by specific dino/elroy/wax code */ | |
64 | ||
65 | #define ADDR2PORT(addr) ((unsigned long __force)(addr) & 0xffffff) | |
66 | ||
67 | static unsigned int ioport_read8(void __iomem *addr) | |
68 | { | |
69 | return inb(ADDR2PORT(addr)); | |
70 | } | |
71 | ||
72 | static unsigned int ioport_read16(void __iomem *addr) | |
73 | { | |
74 | return inw(ADDR2PORT(addr)); | |
75 | } | |
76 | ||
77 | static unsigned int ioport_read32(void __iomem *addr) | |
78 | { | |
79 | return inl(ADDR2PORT(addr)); | |
80 | } | |
81 | ||
82 | static void ioport_write8(u8 datum, void __iomem *addr) | |
83 | { | |
84 | outb(datum, ADDR2PORT(addr)); | |
85 | } | |
86 | ||
87 | static void ioport_write16(u16 datum, void __iomem *addr) | |
88 | { | |
89 | outw(datum, ADDR2PORT(addr)); | |
90 | } | |
91 | ||
92 | static void ioport_write32(u32 datum, void __iomem *addr) | |
93 | { | |
94 | outl(datum, ADDR2PORT(addr)); | |
95 | } | |
96 | ||
97 | static void ioport_read8r(void __iomem *addr, void *dst, unsigned long count) | |
98 | { | |
99 | insb(ADDR2PORT(addr), dst, count); | |
100 | } | |
101 | ||
102 | static void ioport_read16r(void __iomem *addr, void *dst, unsigned long count) | |
103 | { | |
104 | insw(ADDR2PORT(addr), dst, count); | |
105 | } | |
106 | ||
107 | static void ioport_read32r(void __iomem *addr, void *dst, unsigned long count) | |
108 | { | |
109 | insl(ADDR2PORT(addr), dst, count); | |
110 | } | |
111 | ||
112 | static void ioport_write8r(void __iomem *addr, const void *s, unsigned long n) | |
113 | { | |
114 | outsb(ADDR2PORT(addr), s, n); | |
115 | } | |
116 | ||
117 | static void ioport_write16r(void __iomem *addr, const void *s, unsigned long n) | |
118 | { | |
119 | outsw(ADDR2PORT(addr), s, n); | |
120 | } | |
121 | ||
122 | static void ioport_write32r(void __iomem *addr, const void *s, unsigned long n) | |
123 | { | |
124 | outsl(ADDR2PORT(addr), s, n); | |
125 | } | |
126 | ||
127 | static const struct iomap_ops ioport_ops = { | |
128 | ioport_read8, | |
129 | ioport_read16, | |
dae409a2 JB |
130 | ioport_read16, |
131 | ioport_read32, | |
1da177e4 LT |
132 | ioport_read32, |
133 | ioport_write8, | |
134 | ioport_write16, | |
dae409a2 JB |
135 | ioport_write16, |
136 | ioport_write32, | |
1da177e4 LT |
137 | ioport_write32, |
138 | ioport_read8r, | |
139 | ioport_read16r, | |
140 | ioport_read32r, | |
141 | ioport_write8r, | |
142 | ioport_write16r, | |
143 | ioport_write32r, | |
144 | }; | |
145 | ||
146 | /* Legacy I/O memory ops */ | |
147 | ||
148 | static unsigned int iomem_read8(void __iomem *addr) | |
149 | { | |
150 | return readb(addr); | |
151 | } | |
152 | ||
153 | static unsigned int iomem_read16(void __iomem *addr) | |
154 | { | |
155 | return readw(addr); | |
156 | } | |
157 | ||
dae409a2 JB |
158 | static unsigned int iomem_read16be(void __iomem *addr) |
159 | { | |
160 | return __raw_readw(addr); | |
161 | } | |
162 | ||
1da177e4 LT |
163 | static unsigned int iomem_read32(void __iomem *addr) |
164 | { | |
165 | return readl(addr); | |
166 | } | |
167 | ||
dae409a2 JB |
168 | static unsigned int iomem_read32be(void __iomem *addr) |
169 | { | |
170 | return __raw_readl(addr); | |
171 | } | |
172 | ||
1da177e4 LT |
173 | static void iomem_write8(u8 datum, void __iomem *addr) |
174 | { | |
175 | writeb(datum, addr); | |
176 | } | |
177 | ||
178 | static void iomem_write16(u16 datum, void __iomem *addr) | |
179 | { | |
180 | writew(datum, addr); | |
181 | } | |
182 | ||
dae409a2 JB |
183 | static void iomem_write16be(u16 datum, void __iomem *addr) |
184 | { | |
185 | __raw_writew(datum, addr); | |
186 | } | |
187 | ||
1da177e4 LT |
188 | static void iomem_write32(u32 datum, void __iomem *addr) |
189 | { | |
190 | writel(datum, addr); | |
191 | } | |
192 | ||
dae409a2 JB |
193 | static void iomem_write32be(u32 datum, void __iomem *addr) |
194 | { | |
195 | __raw_writel(datum, addr); | |
196 | } | |
197 | ||
1da177e4 LT |
198 | static void iomem_read8r(void __iomem *addr, void *dst, unsigned long count) |
199 | { | |
200 | while (count--) { | |
201 | *(u8 *)dst = __raw_readb(addr); | |
202 | dst++; | |
203 | } | |
204 | } | |
205 | ||
206 | static void iomem_read16r(void __iomem *addr, void *dst, unsigned long count) | |
207 | { | |
208 | while (count--) { | |
209 | *(u16 *)dst = __raw_readw(addr); | |
210 | dst += 2; | |
211 | } | |
212 | } | |
213 | ||
214 | static void iomem_read32r(void __iomem *addr, void *dst, unsigned long count) | |
215 | { | |
216 | while (count--) { | |
217 | *(u32 *)dst = __raw_readl(addr); | |
218 | dst += 4; | |
219 | } | |
220 | } | |
221 | ||
222 | static void iomem_write8r(void __iomem *addr, const void *s, unsigned long n) | |
223 | { | |
224 | while (n--) { | |
225 | __raw_writeb(*(u8 *)s, addr); | |
226 | s++; | |
227 | } | |
228 | } | |
229 | ||
230 | static void iomem_write16r(void __iomem *addr, const void *s, unsigned long n) | |
231 | { | |
232 | while (n--) { | |
233 | __raw_writew(*(u16 *)s, addr); | |
234 | s += 2; | |
235 | } | |
236 | } | |
237 | ||
238 | static void iomem_write32r(void __iomem *addr, const void *s, unsigned long n) | |
239 | { | |
240 | while (n--) { | |
241 | __raw_writel(*(u32 *)s, addr); | |
242 | s += 4; | |
243 | } | |
244 | } | |
245 | ||
246 | static const struct iomap_ops iomem_ops = { | |
247 | iomem_read8, | |
248 | iomem_read16, | |
dae409a2 | 249 | iomem_read16be, |
1da177e4 | 250 | iomem_read32, |
dae409a2 | 251 | iomem_read32be, |
1da177e4 LT |
252 | iomem_write8, |
253 | iomem_write16, | |
dae409a2 | 254 | iomem_write16be, |
1da177e4 | 255 | iomem_write32, |
dae409a2 | 256 | iomem_write32be, |
1da177e4 LT |
257 | iomem_read8r, |
258 | iomem_read16r, | |
259 | iomem_read32r, | |
260 | iomem_write8r, | |
261 | iomem_write16r, | |
262 | iomem_write32r, | |
263 | }; | |
264 | ||
8f47cb87 | 265 | static const struct iomap_ops *iomap_ops[8] = { |
1da177e4 | 266 | [0] = &ioport_ops, |
1da177e4 | 267 | [7] = &iomem_ops |
1da177e4 LT |
268 | }; |
269 | ||
270 | ||
271 | unsigned int ioread8(void __iomem *addr) | |
272 | { | |
273 | if (unlikely(INDIRECT_ADDR(addr))) | |
274 | return iomap_ops[ADDR_TO_REGION(addr)]->read8(addr); | |
275 | return *((u8 *)addr); | |
276 | } | |
277 | ||
278 | unsigned int ioread16(void __iomem *addr) | |
279 | { | |
280 | if (unlikely(INDIRECT_ADDR(addr))) | |
281 | return iomap_ops[ADDR_TO_REGION(addr)]->read16(addr); | |
282 | return le16_to_cpup((u16 *)addr); | |
283 | } | |
284 | ||
dae409a2 JB |
285 | unsigned int ioread16be(void __iomem *addr) |
286 | { | |
287 | if (unlikely(INDIRECT_ADDR(addr))) | |
288 | return iomap_ops[ADDR_TO_REGION(addr)]->read16be(addr); | |
289 | return *((u16 *)addr); | |
290 | } | |
291 | ||
1da177e4 LT |
292 | unsigned int ioread32(void __iomem *addr) |
293 | { | |
294 | if (unlikely(INDIRECT_ADDR(addr))) | |
295 | return iomap_ops[ADDR_TO_REGION(addr)]->read32(addr); | |
296 | return le32_to_cpup((u32 *)addr); | |
297 | } | |
298 | ||
dae409a2 JB |
299 | unsigned int ioread32be(void __iomem *addr) |
300 | { | |
301 | if (unlikely(INDIRECT_ADDR(addr))) | |
302 | return iomap_ops[ADDR_TO_REGION(addr)]->read32be(addr); | |
303 | return *((u32 *)addr); | |
304 | } | |
305 | ||
1da177e4 LT |
306 | void iowrite8(u8 datum, void __iomem *addr) |
307 | { | |
308 | if (unlikely(INDIRECT_ADDR(addr))) { | |
309 | iomap_ops[ADDR_TO_REGION(addr)]->write8(datum, addr); | |
310 | } else { | |
311 | *((u8 *)addr) = datum; | |
312 | } | |
313 | } | |
314 | ||
315 | void iowrite16(u16 datum, void __iomem *addr) | |
316 | { | |
317 | if (unlikely(INDIRECT_ADDR(addr))) { | |
318 | iomap_ops[ADDR_TO_REGION(addr)]->write16(datum, addr); | |
319 | } else { | |
320 | *((u16 *)addr) = cpu_to_le16(datum); | |
321 | } | |
322 | } | |
323 | ||
dae409a2 JB |
324 | void iowrite16be(u16 datum, void __iomem *addr) |
325 | { | |
326 | if (unlikely(INDIRECT_ADDR(addr))) { | |
327 | iomap_ops[ADDR_TO_REGION(addr)]->write16be(datum, addr); | |
328 | } else { | |
329 | *((u16 *)addr) = datum; | |
330 | } | |
331 | } | |
332 | ||
1da177e4 LT |
333 | void iowrite32(u32 datum, void __iomem *addr) |
334 | { | |
335 | if (unlikely(INDIRECT_ADDR(addr))) { | |
336 | iomap_ops[ADDR_TO_REGION(addr)]->write32(datum, addr); | |
337 | } else { | |
338 | *((u32 *)addr) = cpu_to_le32(datum); | |
339 | } | |
340 | } | |
341 | ||
dae409a2 JB |
342 | void iowrite32be(u32 datum, void __iomem *addr) |
343 | { | |
344 | if (unlikely(INDIRECT_ADDR(addr))) { | |
345 | iomap_ops[ADDR_TO_REGION(addr)]->write32be(datum, addr); | |
346 | } else { | |
347 | *((u32 *)addr) = datum; | |
348 | } | |
349 | } | |
350 | ||
1da177e4 LT |
351 | /* Repeating interfaces */ |
352 | ||
353 | void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) | |
354 | { | |
355 | if (unlikely(INDIRECT_ADDR(addr))) { | |
356 | iomap_ops[ADDR_TO_REGION(addr)]->read8r(addr, dst, count); | |
357 | } else { | |
358 | while (count--) { | |
359 | *(u8 *)dst = *(u8 *)addr; | |
360 | dst++; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) | |
366 | { | |
367 | if (unlikely(INDIRECT_ADDR(addr))) { | |
368 | iomap_ops[ADDR_TO_REGION(addr)]->read16r(addr, dst, count); | |
369 | } else { | |
370 | while (count--) { | |
371 | *(u16 *)dst = *(u16 *)addr; | |
372 | dst += 2; | |
373 | } | |
374 | } | |
375 | } | |
376 | ||
377 | void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) | |
378 | { | |
379 | if (unlikely(INDIRECT_ADDR(addr))) { | |
380 | iomap_ops[ADDR_TO_REGION(addr)]->read32r(addr, dst, count); | |
381 | } else { | |
382 | while (count--) { | |
383 | *(u32 *)dst = *(u32 *)addr; | |
384 | dst += 4; | |
385 | } | |
386 | } | |
387 | } | |
388 | ||
389 | void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) | |
390 | { | |
391 | if (unlikely(INDIRECT_ADDR(addr))) { | |
392 | iomap_ops[ADDR_TO_REGION(addr)]->write8r(addr, src, count); | |
393 | } else { | |
394 | while (count--) { | |
395 | *(u8 *)addr = *(u8 *)src; | |
396 | src++; | |
397 | } | |
398 | } | |
399 | } | |
400 | ||
401 | void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) | |
402 | { | |
403 | if (unlikely(INDIRECT_ADDR(addr))) { | |
404 | iomap_ops[ADDR_TO_REGION(addr)]->write16r(addr, src, count); | |
405 | } else { | |
406 | while (count--) { | |
407 | *(u16 *)addr = *(u16 *)src; | |
408 | src += 2; | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
413 | void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) | |
414 | { | |
415 | if (unlikely(INDIRECT_ADDR(addr))) { | |
416 | iomap_ops[ADDR_TO_REGION(addr)]->write32r(addr, src, count); | |
417 | } else { | |
418 | while (count--) { | |
419 | *(u32 *)addr = *(u32 *)src; | |
420 | src += 4; | |
421 | } | |
422 | } | |
423 | } | |
424 | ||
425 | /* Mapping interfaces */ | |
426 | ||
427 | void __iomem *ioport_map(unsigned long port, unsigned int nr) | |
428 | { | |
429 | return (void __iomem *)(IOPORT_MAP_BASE | port); | |
430 | } | |
431 | ||
432 | void ioport_unmap(void __iomem *addr) | |
433 | { | |
434 | if (!INDIRECT_ADDR(addr)) { | |
435 | iounmap(addr); | |
436 | } | |
437 | } | |
438 | ||
1da177e4 LT |
439 | void pci_iounmap(struct pci_dev *dev, void __iomem * addr) |
440 | { | |
441 | if (!INDIRECT_ADDR(addr)) { | |
442 | iounmap(addr); | |
443 | } | |
444 | } | |
445 | ||
446 | EXPORT_SYMBOL(ioread8); | |
447 | EXPORT_SYMBOL(ioread16); | |
dae409a2 | 448 | EXPORT_SYMBOL(ioread16be); |
1da177e4 | 449 | EXPORT_SYMBOL(ioread32); |
dae409a2 | 450 | EXPORT_SYMBOL(ioread32be); |
1da177e4 LT |
451 | EXPORT_SYMBOL(iowrite8); |
452 | EXPORT_SYMBOL(iowrite16); | |
dae409a2 | 453 | EXPORT_SYMBOL(iowrite16be); |
1da177e4 | 454 | EXPORT_SYMBOL(iowrite32); |
dae409a2 | 455 | EXPORT_SYMBOL(iowrite32be); |
1da177e4 LT |
456 | EXPORT_SYMBOL(ioread8_rep); |
457 | EXPORT_SYMBOL(ioread16_rep); | |
458 | EXPORT_SYMBOL(ioread32_rep); | |
459 | EXPORT_SYMBOL(iowrite8_rep); | |
460 | EXPORT_SYMBOL(iowrite16_rep); | |
461 | EXPORT_SYMBOL(iowrite32_rep); | |
462 | EXPORT_SYMBOL(ioport_map); | |
463 | EXPORT_SYMBOL(ioport_unmap); | |
1da177e4 | 464 | EXPORT_SYMBOL(pci_iounmap); |