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