aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-frv/io.h
blob: ca7475e73b5ee7f2673334011f86e5cb77ac62b1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/* io.h: FRV I/O operations
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * This gets interesting when talking to the PCI bus - the CPU is in big endian
 * mode, the PCI bus is little endian and the hardware in the middle can do
 * byte swapping
 */
#ifndef _ASM_IO_H
#define _ASM_IO_H

#ifdef __KERNEL__

#include <linux/types.h>
#include <asm/virtconvert.h>
#include <asm/string.h>
#include <asm/mb-regs.h>
#include <linux/delay.h>

/*
 * swap functions are sometimes needed to interface little-endian hardware
 */

static inline unsigned short _swapw(unsigned short v)
{
    return ((v << 8) | (v >> 8));
}

static inline unsigned long _swapl(unsigned long v)
{
    return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
}

//#define __iormb() asm volatile("membar")
//#define __iowmb() asm volatile("membar")

#define __raw_readb __builtin_read8
#define __raw_readw __builtin_read16
#define __raw_readl __builtin_read32

#define __raw_writeb(datum, addr) __builtin_write8(addr, datum)
#define __raw_writew(datum, addr) __builtin_write16(addr, datum)
#define __raw_writel(datum, addr) __builtin_write32(addr, datum)

static inline void io_outsb(unsigned int addr, const void *buf, int len)
{
	unsigned long __ioaddr = (unsigned long) addr;
	const uint8_t *bp = buf;

	while (len--)
		__builtin_write8((volatile void __iomem *) __ioaddr, *bp++);
}

static inline void io_outsw(unsigned int addr, const void *buf, int len)
{
	unsigned long __ioaddr = (unsigned long) addr;
	const uint16_t *bp = buf;

	while (len--)
		__builtin_write16((volatile void __iomem *) __ioaddr, (*bp++));
}

extern void __outsl_ns(unsigned int addr, const void *buf, int len);
extern void __outsl_sw(unsigned int addr, const void *buf, int len);
static inline void __outsl(unsigned int addr, const void *buf, int len, int swap)
{
	unsigned long __ioaddr = (unsigned long) addr;

	if (!swap)
		__outsl_ns(__ioaddr, buf, len);
	else
		__outsl_sw(__ioaddr, buf, len);
}

static inline void io_insb(unsigned long addr, void *buf, int len)
{
	uint8_t *bp = buf;

	while (len--)
		*bp++ = __builtin_read8((volatile void __iomem *) addr);
}

static inline void io_insw(unsigned long addr, void *buf, int len)
{
	uint16_t *bp = buf;

	while (len--)
		*bp++ = __builtin_read16((volatile void __iomem *) addr);
}

extern void __insl_ns(unsigned long addr, void *buf, int len);
extern void __insl_sw(unsigned long addr, void *buf, int len);
static inline void __insl(unsigned long addr, void *buf, int len, int swap)
{
	if (!swap)
		__insl_ns(addr, buf, len);
	else
		__insl_sw(addr, buf, len);
}

#define mmiowb() mb()

/*
 *	make the short names macros so specific devices
 *	can override them as required
 */

static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
	memset((void __force *) addr, val, count);
}

static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
{
	memcpy(dst, (void __force *) src, count);
}

static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
{
	memcpy((void __force *) dst, src, count);
}

static inline uint8_t inb(unsigned long addr)
{
	return __builtin_read8((void __iomem *)addr);
}

static inline uint16_t inw(unsigned long addr)
{
	uint16_t ret = __builtin_read16((void __iomem *)addr);

	if (__is_PCI_IO(addr))
		ret = _swapw(ret);

	return ret;
}

static inline uint32_t inl(unsigned long addr)
{
	uint32_t ret = __builtin_read32((void __iomem *)addr);

	if (__is_PCI_IO(addr))
		ret = _swapl(ret);

	return ret;
}

static inline void outb(uint8_t datum, unsigned long addr)
{
	__builtin_write8((void __iomem *)addr, datum);
}

static inline void outw(uint16_t datum, unsigned long addr)
{
	if (__is_PCI_IO(addr))
		datum = _swapw(datum);
	__builtin_write16((void __iomem *)addr, datum);
}

static inline void outl(uint32_t datum, unsigned long addr)
{
	if (__is_PCI_IO(addr))
		datum = _swapl(datum);
	__builtin_write32((void __iomem *)addr, datum);
}

#define inb_p(addr)	inb(addr)
#define inw_p(addr)	inw(addr)
#define inl_p(addr)	inl(addr)
#define outb_p(x,addr)	outb(x,addr)
#define outw_p(x,addr)	outw(x,addr)
#define outl_p(x,addr)	outl(x,addr)

#define outsb(a,b,l)	io_outsb(a,b,l)
#define outsw(a,b,l)	io_outsw(a,b,l)
#define outsl(a,b,l)	__outsl(a,b,l,0)

#define insb(a,b,l)	io_insb(a,b,l)
#define insw(a,b,l)	io_insw(a,b,l)
#define insl(a,b,l)	__insl(a,b,l,0)

#define IO_SPACE_LIMIT	0xffffffff

static inline uint8_t readb(const volatile void __iomem *addr)
{
	return __builtin_read8((__force void volatile __iomem *) addr);
}

static inline uint16_t readw(const volatile void __iomem *addr)
{
	uint16_t ret =	__builtin_read16((__force void volatile __iomem *)addr);

	if (__is_PCI_MEM(addr))
		ret = _swapw(ret);
	return ret;
}

static inline uint32_t readl(const volatile void __iomem *addr)
{
	uint32_t ret =	__builtin_read32((__force void volatile __iomem *)addr);

	if (__is_PCI_MEM(addr))
		ret = _swapl(ret);

	return ret;
}

#define readb_relaxed readb
#define readw_relaxed readw
#define readl_relaxed readl

static inline void writeb(uint8_t datum, volatile void __iomem *addr)
{
	__builtin_write8(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}

static inline void writew(uint16_t datum, volatile void __iomem *addr)
{
	if (__is_PCI_MEM(addr))
		datum = _swapw(datum);

	__builtin_write16(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}

static inline void writel(uint32_t datum, volatile void __iomem *addr)
{
	if (__is_PCI_MEM(addr))
		datum = _swapl(datum);

	__builtin_write32(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}


/* Values for nocacheflag and cmode */
#define IOMAP_FULL_CACHING		0
#define IOMAP_NOCACHE_SER		1
#define IOMAP_NOCACHE_NONSER		2
#define IOMAP_WRITETHROUGH		3

extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);

static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}

static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}

static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
}

static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}

#define ioremap_wc ioremap_nocache

extern void iounmap(void volatile __iomem *addr);

static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
	return (void __iomem *) port;
}

static inline void ioport_unmap(void __iomem *p)
{
}

static inline void flush_write_buffers(void)
{
	__asm__ __volatile__ ("membar" : : :"memory");
}

/*
 * do appropriate I/O accesses for token type
 */
static inline unsigned int ioread8(void __iomem *p)
{
	return __builtin_read8(p);
}

static inline unsigned int ioread16(void __iomem *p)
{
	uint16_t ret = __builtin_read16(p);
	if (__is_PCI_addr(p))
		ret = _swapw(ret);
	return ret;
}

static inline unsigned int ioread32(void __iomem *p)
{
	uint32_t ret = __builtin_read32(p);
	if (__is_PCI_addr(p))
		ret = _swapl(ret);
	return ret;
}

static inline void iowrite8(u8 val, void __iomem *p)
{
	__builtin_write8(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void iowrite16(u16 val, void __iomem *p)
{
	if (__is_PCI_addr(p))
		val = _swapw(val);
	__builtin_write16(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void iowrite32(u32 val, void __iomem *p)
{
	if (__is_PCI_addr(p))
		val = _swapl(val);
	__builtin_write32(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count)
{
	io_insb((unsigned long) p, dst, count);
}

static inline void ioread16_rep(void __iomem *p, void *dst, unsigned long count)
{
	io_insw((unsigned long) p, dst, count);
}

static inline void ioread32_rep(void __iomem *p, void *dst, unsigned long count)
{
	__insl_ns((unsigned long) p, dst, count);
}

static inline void iowrite8_rep(void __iomem *p, const void *src, unsigned long count)
{
	io_outsb((unsigned long) p, src, count);
}

static inline void iowrite16_rep(void __iomem *p, const void *src, unsigned long count)
{
	io_outsw((unsigned long) p, src, count);
}

static inline void iowrite32_rep(void __iomem *p, const void *src, unsigned long count)
{
	__outsl_ns((unsigned long) p, src, count);
}

/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
{
}


/*
 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 * access
 */
#define xlate_dev_mem_ptr(p)	__va(p)

/*
 * Convert a virtual cached pointer to an uncached pointer
 */
#define xlate_dev_kmem_ptr(p)	p

#endif /* __KERNEL__ */

#endif /* _ASM_IO_H */