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Diffstat (limited to 'include/asm-frv/io.h')
-rw-r--r-- | include/asm-frv/io.h | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/include/asm-frv/io.h b/include/asm-frv/io.h new file mode 100644 index 000000000000..48829f727242 --- /dev/null +++ b/include/asm-frv/io.h | |||
@@ -0,0 +1,290 @@ | |||
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> | ||
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 | |||
43 | #define __raw_readb(addr) __builtin_read8((void *) (addr)) | ||
44 | #define __raw_readw(addr) __builtin_read16((void *) (addr)) | ||
45 | #define __raw_readl(addr) __builtin_read32((void *) (addr)) | ||
46 | |||
47 | #define __raw_writeb(datum, addr) __builtin_write8((void *) (addr), datum) | ||
48 | #define __raw_writew(datum, addr) __builtin_write16((void *) (addr), datum) | ||
49 | #define __raw_writel(datum, addr) __builtin_write32((void *) (addr), datum) | ||
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 | |||
107 | /* | ||
108 | * make the short names macros so specific devices | ||
109 | * can override them as required | ||
110 | */ | ||
111 | |||
112 | static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) | ||
113 | { | ||
114 | memset((void __force *) addr, val, count); | ||
115 | } | ||
116 | |||
117 | static inline void memcpy_fromio(void *dst, volatile void __iomem *src, int count) | ||
118 | { | ||
119 | memcpy(dst, (void __force *) src, count); | ||
120 | } | ||
121 | |||
122 | static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) | ||
123 | { | ||
124 | memcpy((void __force *) dst, src, count); | ||
125 | } | ||
126 | |||
127 | static inline uint8_t inb(unsigned long addr) | ||
128 | { | ||
129 | return __builtin_read8((void *)addr); | ||
130 | } | ||
131 | |||
132 | static inline uint16_t inw(unsigned long addr) | ||
133 | { | ||
134 | uint16_t ret = __builtin_read16((void *)addr); | ||
135 | |||
136 | if (__is_PCI_IO(addr)) | ||
137 | ret = _swapw(ret); | ||
138 | |||
139 | return ret; | ||
140 | } | ||
141 | |||
142 | static inline uint32_t inl(unsigned long addr) | ||
143 | { | ||
144 | uint32_t ret = __builtin_read32((void *)addr); | ||
145 | |||
146 | if (__is_PCI_IO(addr)) | ||
147 | ret = _swapl(ret); | ||
148 | |||
149 | return ret; | ||
150 | } | ||
151 | |||
152 | static inline void outb(uint8_t datum, unsigned long addr) | ||
153 | { | ||
154 | __builtin_write8((void *)addr, datum); | ||
155 | } | ||
156 | |||
157 | static inline void outw(uint16_t datum, unsigned long addr) | ||
158 | { | ||
159 | if (__is_PCI_IO(addr)) | ||
160 | datum = _swapw(datum); | ||
161 | __builtin_write16((void *)addr, datum); | ||
162 | } | ||
163 | |||
164 | static inline void outl(uint32_t datum, unsigned long addr) | ||
165 | { | ||
166 | if (__is_PCI_IO(addr)) | ||
167 | datum = _swapl(datum); | ||
168 | __builtin_write32((void *)addr, datum); | ||
169 | } | ||
170 | |||
171 | #define inb_p(addr) inb(addr) | ||
172 | #define inw_p(addr) inw(addr) | ||
173 | #define inl_p(addr) inl(addr) | ||
174 | #define outb_p(x,addr) outb(x,addr) | ||
175 | #define outw_p(x,addr) outw(x,addr) | ||
176 | #define outl_p(x,addr) outl(x,addr) | ||
177 | |||
178 | #define outsb(a,b,l) io_outsb(a,b,l) | ||
179 | #define outsw(a,b,l) io_outsw(a,b,l) | ||
180 | #define outsl(a,b,l) __outsl(a,b,l,0) | ||
181 | |||
182 | #define insb(a,b,l) io_insb(a,b,l) | ||
183 | #define insw(a,b,l) io_insw(a,b,l) | ||
184 | #define insl(a,b,l) __insl(a,b,l,0) | ||
185 | |||
186 | #define IO_SPACE_LIMIT 0xffffffff | ||
187 | |||
188 | static inline uint8_t readb(const volatile void __iomem *addr) | ||
189 | { | ||
190 | return __builtin_read8((volatile uint8_t __force *) addr); | ||
191 | } | ||
192 | |||
193 | static inline uint16_t readw(const volatile void __iomem *addr) | ||
194 | { | ||
195 | uint16_t ret = __builtin_read16((volatile uint16_t __force *)addr); | ||
196 | |||
197 | if (__is_PCI_MEM(addr)) | ||
198 | ret = _swapw(ret); | ||
199 | return ret; | ||
200 | } | ||
201 | |||
202 | static inline uint32_t readl(const volatile void __iomem *addr) | ||
203 | { | ||
204 | uint32_t ret = __builtin_read32((volatile uint32_t __force *)addr); | ||
205 | |||
206 | if (__is_PCI_MEM(addr)) | ||
207 | ret = _swapl(ret); | ||
208 | |||
209 | return ret; | ||
210 | } | ||
211 | |||
212 | static inline void writeb(uint8_t datum, volatile void __iomem *addr) | ||
213 | { | ||
214 | __builtin_write8((volatile uint8_t __force *) addr, datum); | ||
215 | if (__is_PCI_MEM(addr)) | ||
216 | __flush_PCI_writes(); | ||
217 | } | ||
218 | |||
219 | static inline void writew(uint16_t datum, volatile void __iomem *addr) | ||
220 | { | ||
221 | if (__is_PCI_MEM(addr)) | ||
222 | datum = _swapw(datum); | ||
223 | |||
224 | __builtin_write16((volatile uint16_t __force *) addr, datum); | ||
225 | if (__is_PCI_MEM(addr)) | ||
226 | __flush_PCI_writes(); | ||
227 | } | ||
228 | |||
229 | static inline void writel(uint32_t datum, volatile void __iomem *addr) | ||
230 | { | ||
231 | if (__is_PCI_MEM(addr)) | ||
232 | datum = _swapl(datum); | ||
233 | |||
234 | __builtin_write32((volatile uint32_t __force *) addr, datum); | ||
235 | if (__is_PCI_MEM(addr)) | ||
236 | __flush_PCI_writes(); | ||
237 | } | ||
238 | |||
239 | |||
240 | /* Values for nocacheflag and cmode */ | ||
241 | #define IOMAP_FULL_CACHING 0 | ||
242 | #define IOMAP_NOCACHE_SER 1 | ||
243 | #define IOMAP_NOCACHE_NONSER 2 | ||
244 | #define IOMAP_WRITETHROUGH 3 | ||
245 | |||
246 | extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); | ||
247 | extern void __iounmap(void __iomem *addr, unsigned long size); | ||
248 | |||
249 | static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) | ||
250 | { | ||
251 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); | ||
252 | } | ||
253 | |||
254 | static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size) | ||
255 | { | ||
256 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); | ||
257 | } | ||
258 | |||
259 | static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size) | ||
260 | { | ||
261 | return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); | ||
262 | } | ||
263 | |||
264 | static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size) | ||
265 | { | ||
266 | return __ioremap(physaddr, size, IOMAP_FULL_CACHING); | ||
267 | } | ||
268 | |||
269 | extern void iounmap(void __iomem *addr); | ||
270 | |||
271 | static inline void flush_write_buffers(void) | ||
272 | { | ||
273 | __asm__ __volatile__ ("membar" : : :"memory"); | ||
274 | } | ||
275 | |||
276 | |||
277 | /* | ||
278 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | ||
279 | * access | ||
280 | */ | ||
281 | #define xlate_dev_mem_ptr(p) __va(p) | ||
282 | |||
283 | /* | ||
284 | * Convert a virtual cached pointer to an uncached pointer | ||
285 | */ | ||
286 | #define xlate_dev_kmem_ptr(p) p | ||
287 | |||
288 | #endif /* __KERNEL__ */ | ||
289 | |||
290 | #endif /* _ASM_IO_H */ | ||