aboutsummaryrefslogtreecommitdiffstats
path: root/arch/tile/include/asm/io.h
blob: d2152deb1f3cf6a3bc352d92d445df4157a0924e (plain) (blame)
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
/*
 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 *
 *   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, version 2.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#ifndef _ASM_TILE_IO_H
#define _ASM_TILE_IO_H

#include <linux/kernel.h>
#include <linux/bug.h>
#include <asm/page.h>

#define IO_SPACE_LIMIT 0xfffffffful

/*
 * 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

/*
 * Change "struct page" to physical address.
 */
#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)

/*
 * Some places try to pass in an loff_t for PHYSADDR (?!), so we cast it to
 * long before casting it to a pointer to avoid compiler warnings.
 */
#if CHIP_HAS_MMIO()
extern void __iomem *ioremap(resource_size_t offset, unsigned long size);
extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
	pgprot_t pgprot);
extern void iounmap(volatile void __iomem *addr);
#else
#define ioremap(physaddr, size)	((void __iomem *)(unsigned long)(physaddr))
#define iounmap(addr)		((void)0)
#endif

#define ioremap_nocache(physaddr, size)		ioremap(physaddr, size)
#define ioremap_wc(physaddr, size)		ioremap(physaddr, size)
#define ioremap_writethrough(physaddr, size)	ioremap(physaddr, size)
#define ioremap_fullcache(physaddr, size)	ioremap(physaddr, size)

#define mmiowb()

/* Conversion between virtual and physical mappings.  */
#define mm_ptov(addr)		((void *)phys_to_virt(addr))
#define mm_vtop(addr)		((unsigned long)virt_to_phys(addr))

#ifdef CONFIG_PCI

extern u8 _tile_readb(unsigned long addr);
extern u16 _tile_readw(unsigned long addr);
extern u32 _tile_readl(unsigned long addr);
extern u64 _tile_readq(unsigned long addr);
extern void _tile_writeb(u8  val, unsigned long addr);
extern void _tile_writew(u16 val, unsigned long addr);
extern void _tile_writel(u32 val, unsigned long addr);
extern void _tile_writeq(u64 val, unsigned long addr);

#else

/*
 * The Tile architecture does not support IOMEM unless PCI is enabled.
 * Unfortunately we can't yet simply not declare these methods,
 * since some generic code that compiles into the kernel, but
 * we never run, uses them unconditionally.
 */

static inline int iomem_panic(void)
{
	panic("readb/writeb and friends do not exist on tile without PCI");
	return 0;
}

static inline u8 _tile_readb(unsigned long addr)
{
	return iomem_panic();
}

static inline u16 _tile_readw(unsigned long addr)
{
	return iomem_panic();
}

static inline u32 _tile_readl(unsigned long addr)
{
	return iomem_panic();
}

static inline u64 _tile_readq(unsigned long addr)
{
	return iomem_panic();
}

static inline void _tile_writeb(u8  val, unsigned long addr)
{
	iomem_panic();
}

static inline void _tile_writew(u16 val, unsigned long addr)
{
	iomem_panic();
}

static inline void _tile_writel(u32 val, unsigned long addr)
{
	iomem_panic();
}

static inline void _tile_writeq(u64 val, unsigned long addr)
{
	iomem_panic();
}

#endif

#define readb(addr) _tile_readb((unsigned long)addr)
#define readw(addr) _tile_readw((unsigned long)addr)
#define readl(addr) _tile_readl((unsigned long)addr)
#define readq(addr) _tile_readq((unsigned long)addr)
#define writeb(val, addr) _tile_writeb(val, (unsigned long)addr)
#define writew(val, addr) _tile_writew(val, (unsigned long)addr)
#define writel(val, addr) _tile_writel(val, (unsigned long)addr)
#define writeq(val, addr) _tile_writeq(val, (unsigned long)addr)

#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#define __raw_readq readq
#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel
#define __raw_writeq writeq

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

#define ioread8 readb
#define ioread16 readw
#define ioread32 readl
#define ioread64 readq
#define iowrite8 writeb
#define iowrite16 writew
#define iowrite32 writel
#define iowrite64 writeq

static inline void memset_io(void *dst, int val, size_t len)
{
	int x;
	BUG_ON((unsigned long)dst & 0x3);
	val = (val & 0xff) * 0x01010101;
	for (x = 0; x < len; x += 4)
		writel(val, dst + x);
}

static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
				 size_t len)
{
	int x;
	BUG_ON((unsigned long)src & 0x3);
	for (x = 0; x < len; x += 4)
		*(u32 *)(dst + x) = readl(src + x);
}

static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
				size_t len)
{
	int x;
	BUG_ON((unsigned long)dst & 0x3);
	for (x = 0; x < len; x += 4)
		writel(*(u32 *)(src + x), dst + x);
}

/*
 * The Tile architecture does not support IOPORT, even with PCI.
 * Unfortunately we can't yet simply not declare these methods,
 * since some generic code that compiles into the kernel, but
 * we never run, uses them unconditionally.
 */

static inline long ioport_panic(void)
{
	panic("inb/outb and friends do not exist on tile");
	return 0;
}

static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
{
	pr_info("ioport_map: mapping IO resources is unsupported on tile.\n");
	return NULL;
}

static inline void ioport_unmap(void __iomem *addr)
{
	ioport_panic();
}

static inline u8 inb(unsigned long addr)
{
	return ioport_panic();
}

static inline u16 inw(unsigned long addr)
{
	return ioport_panic();
}

static inline u32 inl(unsigned long addr)
{
	return ioport_panic();
}

static inline void outb(u8 b, unsigned long addr)
{
	ioport_panic();
}

static inline void outw(u16 b, unsigned long addr)
{
	ioport_panic();
}

static inline void outl(u32 b, unsigned long addr)
{
	ioport_panic();
}

#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))

static inline void insb(unsigned long addr, void *buffer, int count)
{
	ioport_panic();
}

static inline void insw(unsigned long addr, void *buffer, int count)
{
	ioport_panic();
}

static inline void insl(unsigned long addr, void *buffer, int count)
{
	ioport_panic();
}

static inline void outsb(unsigned long addr, const void *buffer, int count)
{
	ioport_panic();
}

static inline void outsw(unsigned long addr, const void *buffer, int count)
{
	ioport_panic();
}

static inline void outsl(unsigned long addr, const void *buffer, int count)
{
	ioport_panic();
}

#define ioread16be(addr)	be16_to_cpu(ioread16(addr))
#define ioread32be(addr)	be32_to_cpu(ioread32(addr))
#define iowrite16be(v, addr)	iowrite16(be16_to_cpu(v), (addr))
#define iowrite32be(v, addr)	iowrite32(be32_to_cpu(v), (addr))

#define ioread8_rep(p, dst, count) \
	insb((unsigned long) (p), (dst), (count))
#define ioread16_rep(p, dst, count) \
	insw((unsigned long) (p), (dst), (count))
#define ioread32_rep(p, dst, count) \
	insl((unsigned long) (p), (dst), (count))

#define iowrite8_rep(p, src, count) \
	outsb((unsigned long) (p), (src), (count))
#define iowrite16_rep(p, src, count) \
	outsw((unsigned long) (p), (src), (count))
#define iowrite32_rep(p, src, count) \
	outsl((unsigned long) (p), (src), (count))

#define virt_to_bus     virt_to_phys
#define bus_to_virt     phys_to_virt

#endif /* _ASM_TILE_IO_H */