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1da177e4 LT |
1 | /* io.h: FRV I/O operations |
2 | * | |
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This gets interesting when talking to the PCI bus - the CPU is in big endian | |
12 | * mode, the PCI bus is little endian and the hardware in the middle can do | |
13 | * byte swapping | |
14 | */ | |
15 | #ifndef _ASM_IO_H | |
16 | #define _ASM_IO_H | |
17 | ||
18 | #ifdef __KERNEL__ | |
19 | ||
a90a72c8 | 20 | #include <linux/types.h> |
1da177e4 LT |
21 | #include <asm/virtconvert.h> |
22 | #include <asm/string.h> | |
23 | #include <asm/mb-regs.h> | |
24 | #include <linux/delay.h> | |
25 | ||
26 | /* | |
27 | * swap functions are sometimes needed to interface little-endian hardware | |
28 | */ | |
29 | ||
30 | static inline unsigned short _swapw(unsigned short v) | |
31 | { | |
32 | return ((v << 8) | (v >> 8)); | |
33 | } | |
34 | ||
35 | static inline unsigned long _swapl(unsigned long v) | |
36 | { | |
37 | return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); | |
38 | } | |
39 | ||
40 | //#define __iormb() asm volatile("membar") | |
41 | //#define __iowmb() asm volatile("membar") | |
42 | ||
3f4cd389 AV |
43 | #define __raw_readb __builtin_read8 |
44 | #define __raw_readw __builtin_read16 | |
45 | #define __raw_readl __builtin_read32 | |
1da177e4 | 46 | |
3f4cd389 AV |
47 | #define __raw_writeb(datum, addr) __builtin_write8(addr, datum) |
48 | #define __raw_writew(datum, addr) __builtin_write16(addr, datum) | |
49 | #define __raw_writel(datum, addr) __builtin_write32(addr, datum) | |
1da177e4 LT |
50 | |
51 | static inline void io_outsb(unsigned int addr, const void *buf, int len) | |
52 | { | |
53 | unsigned long __ioaddr = (unsigned long) addr; | |
54 | const uint8_t *bp = buf; | |
55 | ||
56 | while (len--) | |
57 | __builtin_write8((volatile void __iomem *) __ioaddr, *bp++); | |
58 | } | |
59 | ||
60 | static inline void io_outsw(unsigned int addr, const void *buf, int len) | |
61 | { | |
62 | unsigned long __ioaddr = (unsigned long) addr; | |
63 | const uint16_t *bp = buf; | |
64 | ||
65 | while (len--) | |
66 | __builtin_write16((volatile void __iomem *) __ioaddr, (*bp++)); | |
67 | } | |
68 | ||
69 | extern void __outsl_ns(unsigned int addr, const void *buf, int len); | |
70 | extern void __outsl_sw(unsigned int addr, const void *buf, int len); | |
71 | static inline void __outsl(unsigned int addr, const void *buf, int len, int swap) | |
72 | { | |
73 | unsigned long __ioaddr = (unsigned long) addr; | |
74 | ||
75 | if (!swap) | |
76 | __outsl_ns(__ioaddr, buf, len); | |
77 | else | |
78 | __outsl_sw(__ioaddr, buf, len); | |
79 | } | |
80 | ||
81 | static inline void io_insb(unsigned long addr, void *buf, int len) | |
82 | { | |
83 | uint8_t *bp = buf; | |
84 | ||
85 | while (len--) | |
86 | *bp++ = __builtin_read8((volatile void __iomem *) addr); | |
87 | } | |
88 | ||
89 | static inline void io_insw(unsigned long addr, void *buf, int len) | |
90 | { | |
91 | uint16_t *bp = buf; | |
92 | ||
93 | while (len--) | |
94 | *bp++ = __builtin_read16((volatile void __iomem *) addr); | |
95 | } | |
96 | ||
97 | extern void __insl_ns(unsigned long addr, void *buf, int len); | |
98 | extern void __insl_sw(unsigned long addr, void *buf, int len); | |
99 | static inline void __insl(unsigned long addr, void *buf, int len, int swap) | |
100 | { | |
101 | if (!swap) | |
102 | __insl_ns(addr, buf, len); | |
103 | else | |
104 | __insl_sw(addr, buf, len); | |
105 | } | |
106 | ||
a90a72c8 DH |
107 | #define mmiowb() mb() |
108 | ||
1da177e4 LT |
109 | /* |
110 | * make the short names macros so specific devices | |
111 | * can override them as required | |
112 | */ | |
113 | ||
114 | static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) | |
115 | { | |
116 | memset((void __force *) addr, val, count); | |
117 | } | |
118 | ||
5e591a55 | 119 | static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count) |
1da177e4 LT |
120 | { |
121 | memcpy(dst, (void __force *) src, count); | |
122 | } | |
123 | ||
124 | static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) | |
125 | { | |
126 | memcpy((void __force *) dst, src, count); | |
127 | } | |
128 | ||
129 | static inline uint8_t inb(unsigned long addr) | |
130 | { | |
3f4cd389 | 131 | return __builtin_read8((void __iomem *)addr); |
1da177e4 LT |
132 | } |
133 | ||
134 | static inline uint16_t inw(unsigned long addr) | |
135 | { | |
3f4cd389 | 136 | uint16_t ret = __builtin_read16((void __iomem *)addr); |
1da177e4 LT |
137 | |
138 | if (__is_PCI_IO(addr)) | |
139 | ret = _swapw(ret); | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
144 | static inline uint32_t inl(unsigned long addr) | |
145 | { | |
3f4cd389 | 146 | uint32_t ret = __builtin_read32((void __iomem *)addr); |
1da177e4 LT |
147 | |
148 | if (__is_PCI_IO(addr)) | |
149 | ret = _swapl(ret); | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
154 | static inline void outb(uint8_t datum, unsigned long addr) | |
155 | { | |
3f4cd389 | 156 | __builtin_write8((void __iomem *)addr, datum); |
1da177e4 LT |
157 | } |
158 | ||
159 | static inline void outw(uint16_t datum, unsigned long addr) | |
160 | { | |
161 | if (__is_PCI_IO(addr)) | |
162 | datum = _swapw(datum); | |
3f4cd389 | 163 | __builtin_write16((void __iomem *)addr, datum); |
1da177e4 LT |
164 | } |
165 | ||
166 | static inline void outl(uint32_t datum, unsigned long addr) | |
167 | { | |
168 | if (__is_PCI_IO(addr)) | |
169 | datum = _swapl(datum); | |
3f4cd389 | 170 | __builtin_write32((void __iomem *)addr, datum); |
1da177e4 LT |
171 | } |
172 | ||
173 | #define inb_p(addr) inb(addr) | |
174 | #define inw_p(addr) inw(addr) | |
175 | #define inl_p(addr) inl(addr) | |
176 | #define outb_p(x,addr) outb(x,addr) | |
177 | #define outw_p(x,addr) outw(x,addr) | |
178 | #define outl_p(x,addr) outl(x,addr) | |
179 | ||
180 | #define outsb(a,b,l) io_outsb(a,b,l) | |
181 | #define outsw(a,b,l) io_outsw(a,b,l) | |
182 | #define outsl(a,b,l) __outsl(a,b,l,0) | |
183 | ||
184 | #define insb(a,b,l) io_insb(a,b,l) | |
185 | #define insw(a,b,l) io_insw(a,b,l) | |
186 | #define insl(a,b,l) __insl(a,b,l,0) | |
187 | ||
188 | #define IO_SPACE_LIMIT 0xffffffff | |
189 | ||
190 | static inline uint8_t readb(const volatile void __iomem *addr) | |
191 | { | |
3f4cd389 | 192 | return __builtin_read8((__force void volatile __iomem *) addr); |
1da177e4 LT |
193 | } |
194 | ||
195 | static inline uint16_t readw(const volatile void __iomem *addr) | |
196 | { | |
3f4cd389 | 197 | uint16_t ret = __builtin_read16((__force void volatile __iomem *)addr); |
1da177e4 LT |
198 | |
199 | if (__is_PCI_MEM(addr)) | |
200 | ret = _swapw(ret); | |
201 | return ret; | |
202 | } | |
203 | ||
204 | static inline uint32_t readl(const volatile void __iomem *addr) | |
205 | { | |
3f4cd389 | 206 | uint32_t ret = __builtin_read32((__force void volatile __iomem *)addr); |
1da177e4 LT |
207 | |
208 | if (__is_PCI_MEM(addr)) | |
209 | ret = _swapl(ret); | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
a90a72c8 DH |
214 | #define readb_relaxed readb |
215 | #define readw_relaxed readw | |
216 | #define readl_relaxed readl | |
217 | ||
1da177e4 LT |
218 | static inline void writeb(uint8_t datum, volatile void __iomem *addr) |
219 | { | |
3f4cd389 | 220 | __builtin_write8(addr, datum); |
1da177e4 LT |
221 | if (__is_PCI_MEM(addr)) |
222 | __flush_PCI_writes(); | |
223 | } | |
224 | ||
225 | static inline void writew(uint16_t datum, volatile void __iomem *addr) | |
226 | { | |
227 | if (__is_PCI_MEM(addr)) | |
228 | datum = _swapw(datum); | |
229 | ||
3f4cd389 | 230 | __builtin_write16(addr, datum); |
1da177e4 LT |
231 | if (__is_PCI_MEM(addr)) |
232 | __flush_PCI_writes(); | |
233 | } | |
234 | ||
235 | static inline void writel(uint32_t datum, volatile void __iomem *addr) | |
236 | { | |
237 | if (__is_PCI_MEM(addr)) | |
238 | datum = _swapl(datum); | |
239 | ||
3f4cd389 | 240 | __builtin_write32(addr, datum); |
1da177e4 LT |
241 | if (__is_PCI_MEM(addr)) |
242 | __flush_PCI_writes(); | |
243 | } | |
244 | ||
245 | ||
246 | /* Values for nocacheflag and cmode */ | |
247 | #define IOMAP_FULL_CACHING 0 | |
248 | #define IOMAP_NOCACHE_SER 1 | |
249 | #define IOMAP_NOCACHE_NONSER 2 | |
250 | #define IOMAP_WRITETHROUGH 3 | |
251 | ||
252 | extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); | |
1da177e4 LT |
253 | |
254 | static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) | |
255 | { | |
256 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); | |
257 | } | |
258 | ||
259 | static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size) | |
260 | { | |
261 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); | |
262 | } | |
263 | ||
264 | static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size) | |
265 | { | |
266 | return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); | |
267 | } | |
268 | ||
269 | static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size) | |
270 | { | |
271 | return __ioremap(physaddr, size, IOMAP_FULL_CACHING); | |
272 | } | |
273 | ||
3f4cd389 | 274 | extern void iounmap(void volatile __iomem *addr); |
1da177e4 | 275 | |
a90a72c8 DH |
276 | static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) |
277 | { | |
278 | return (void __iomem *) port; | |
279 | } | |
280 | ||
281 | static inline void ioport_unmap(void __iomem *p) | |
282 | { | |
283 | } | |
284 | ||
1da177e4 LT |
285 | static inline void flush_write_buffers(void) |
286 | { | |
287 | __asm__ __volatile__ ("membar" : : :"memory"); | |
288 | } | |
289 | ||
a90a72c8 DH |
290 | /* |
291 | * do appropriate I/O accesses for token type | |
292 | */ | |
293 | static inline unsigned int ioread8(void __iomem *p) | |
294 | { | |
295 | return __builtin_read8(p); | |
296 | } | |
297 | ||
298 | static inline unsigned int ioread16(void __iomem *p) | |
299 | { | |
300 | uint16_t ret = __builtin_read16(p); | |
301 | if (__is_PCI_addr(p)) | |
302 | ret = _swapw(ret); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | static inline unsigned int ioread32(void __iomem *p) | |
307 | { | |
308 | uint32_t ret = __builtin_read32(p); | |
309 | if (__is_PCI_addr(p)) | |
310 | ret = _swapl(ret); | |
311 | return ret; | |
312 | } | |
313 | ||
314 | static inline void iowrite8(u8 val, void __iomem *p) | |
315 | { | |
316 | __builtin_write8(p, val); | |
317 | if (__is_PCI_MEM(p)) | |
318 | __flush_PCI_writes(); | |
319 | } | |
320 | ||
321 | static inline void iowrite16(u16 val, void __iomem *p) | |
322 | { | |
323 | if (__is_PCI_addr(p)) | |
324 | val = _swapw(val); | |
325 | __builtin_write16(p, val); | |
326 | if (__is_PCI_MEM(p)) | |
327 | __flush_PCI_writes(); | |
328 | } | |
329 | ||
330 | static inline void iowrite32(u32 val, void __iomem *p) | |
331 | { | |
332 | if (__is_PCI_addr(p)) | |
333 | val = _swapl(val); | |
334 | __builtin_write32(p, val); | |
335 | if (__is_PCI_MEM(p)) | |
336 | __flush_PCI_writes(); | |
337 | } | |
338 | ||
339 | static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count) | |
340 | { | |
341 | io_insb((unsigned long) p, dst, count); | |
342 | } | |
343 | ||
344 | static inline void ioread16_rep(void __iomem *p, void *dst, unsigned long count) | |
345 | { | |
346 | io_insw((unsigned long) p, dst, count); | |
347 | } | |
348 | ||
349 | static inline void ioread32_rep(void __iomem *p, void *dst, unsigned long count) | |
350 | { | |
351 | __insl_ns((unsigned long) p, dst, count); | |
352 | } | |
353 | ||
354 | static inline void iowrite8_rep(void __iomem *p, const void *src, unsigned long count) | |
355 | { | |
356 | io_outsb((unsigned long) p, src, count); | |
357 | } | |
358 | ||
359 | static inline void iowrite16_rep(void __iomem *p, const void *src, unsigned long count) | |
360 | { | |
361 | io_outsw((unsigned long) p, src, count); | |
362 | } | |
363 | ||
364 | static inline void iowrite32_rep(void __iomem *p, const void *src, unsigned long count) | |
365 | { | |
366 | __outsl_ns((unsigned long) p, src, count); | |
367 | } | |
368 | ||
369 | /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ | |
370 | struct pci_dev; | |
371 | extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); | |
372 | static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p) | |
373 | { | |
374 | } | |
375 | ||
1da177e4 LT |
376 | |
377 | /* | |
378 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | |
379 | * access | |
380 | */ | |
381 | #define xlate_dev_mem_ptr(p) __va(p) | |
382 | ||
383 | /* | |
384 | * Convert a virtual cached pointer to an uncached pointer | |
385 | */ | |
386 | #define xlate_dev_kmem_ptr(p) p | |
387 | ||
a90a72c8 DH |
388 | /* |
389 | * Check BIOS signature | |
390 | */ | |
391 | static inline int check_signature(volatile void __iomem *io_addr, | |
392 | const unsigned char *signature, int length) | |
393 | { | |
394 | int retval = 0; | |
395 | ||
396 | do { | |
397 | if (readb(io_addr) != *signature) | |
398 | goto out; | |
399 | io_addr++; | |
400 | signature++; | |
401 | length--; | |
402 | } while (length); | |
403 | ||
404 | retval = 1; | |
405 | out: | |
406 | return retval; | |
407 | } | |
408 | ||
1da177e4 LT |
409 | #endif /* __KERNEL__ */ |
410 | ||
411 | #endif /* _ASM_IO_H */ |