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-rw-r--r--include/asm-mn10300/io.h301
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diff --git a/include/asm-mn10300/io.h b/include/asm-mn10300/io.h
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1/* MN10300 I/O port emulation and memory-mapped I/O
2 *
3 * Copyright (C) 2007 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 Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
10 */
11#ifndef _ASM_IO_H
12#define _ASM_IO_H
13
14#include <asm/page.h> /* I/O is all done through memory accesses */
15#include <asm/cpu-regs.h>
16#include <asm/cacheflush.h>
17
18#define mmiowb() do {} while (0)
19
20/*****************************************************************************/
21/*
22 * readX/writeX() are used to access memory mapped devices. On some
23 * architectures the memory mapped IO stuff needs to be accessed
24 * differently. On the x86 architecture, we just read/write the
25 * memory location directly.
26 */
27static inline u8 readb(const volatile void __iomem *addr)
28{
29 return *(const volatile u8 *) addr;
30}
31
32static inline u16 readw(const volatile void __iomem *addr)
33{
34 return *(const volatile u16 *) addr;
35}
36
37static inline u32 readl(const volatile void __iomem *addr)
38{
39 return *(const volatile u32 *) addr;
40}
41
42#define __raw_readb readb
43#define __raw_readw readw
44#define __raw_readl readl
45
46#define readb_relaxed readb
47#define readw_relaxed readw
48#define readl_relaxed readl
49
50static inline void writeb(u8 b, volatile void __iomem *addr)
51{
52 *(volatile u8 *) addr = b;
53}
54
55static inline void writew(u16 b, volatile void __iomem *addr)
56{
57 *(volatile u16 *) addr = b;
58}
59
60static inline void writel(u32 b, volatile void __iomem *addr)
61{
62 *(volatile u32 *) addr = b;
63}
64
65#define __raw_writeb writeb
66#define __raw_writew writew
67#define __raw_writel writel
68
69/*****************************************************************************/
70/*
71 * traditional input/output functions
72 */
73static inline u8 inb_local(unsigned long addr)
74{
75 return readb((volatile void __iomem *) addr);
76}
77
78static inline void outb_local(u8 b, unsigned long addr)
79{
80 return writeb(b, (volatile void __iomem *) addr);
81}
82
83static inline u8 inb(unsigned long addr)
84{
85 return readb((volatile void __iomem *) addr);
86}
87
88static inline u16 inw(unsigned long addr)
89{
90 return readw((volatile void __iomem *) addr);
91}
92
93static inline u32 inl(unsigned long addr)
94{
95 return readl((volatile void __iomem *) addr);
96}
97
98static inline void outb(u8 b, unsigned long addr)
99{
100 return writeb(b, (volatile void __iomem *) addr);
101}
102
103static inline void outw(u16 b, unsigned long addr)
104{
105 return writew(b, (volatile void __iomem *) addr);
106}
107
108static inline void outl(u32 b, unsigned long addr)
109{
110 return writel(b, (volatile void __iomem *) addr);
111}
112
113#define inb_p(addr) inb(addr)
114#define inw_p(addr) inw(addr)
115#define inl_p(addr) inl(addr)
116#define outb_p(x, addr) outb((x), (addr))
117#define outw_p(x, addr) outw((x), (addr))
118#define outl_p(x, addr) outl((x), (addr))
119
120static inline void insb(unsigned long addr, void *buffer, int count)
121{
122 if (count) {
123 u8 *buf = buffer;
124 do {
125 u8 x = inb(addr);
126 *buf++ = x;
127 } while (--count);
128 }
129}
130
131static inline void insw(unsigned long addr, void *buffer, int count)
132{
133 if (count) {
134 u16 *buf = buffer;
135 do {
136 u16 x = inw(addr);
137 *buf++ = x;
138 } while (--count);
139 }
140}
141
142static inline void insl(unsigned long addr, void *buffer, int count)
143{
144 if (count) {
145 u32 *buf = buffer;
146 do {
147 u32 x = inl(addr);
148 *buf++ = x;
149 } while (--count);
150 }
151}
152
153static inline void outsb(unsigned long addr, const void *buffer, int count)
154{
155 if (count) {
156 const u8 *buf = buffer;
157 do {
158 outb(*buf++, addr);
159 } while (--count);
160 }
161}
162
163static inline void outsw(unsigned long addr, const void *buffer, int count)
164{
165 if (count) {
166 const u16 *buf = buffer;
167 do {
168 outw(*buf++, addr);
169 } while (--count);
170 }
171}
172
173extern void __outsl(unsigned long addr, const void *buffer, int count);
174static inline void outsl(unsigned long addr, const void *buffer, int count)
175{
176 if ((unsigned long) buffer & 0x3)
177 return __outsl(addr, buffer, count);
178
179 if (count) {
180 const u32 *buf = buffer;
181 do {
182 outl(*buf++, addr);
183 } while (--count);
184 }
185}
186
187#define ioread8(addr) readb(addr)
188#define ioread16(addr) readw(addr)
189#define ioread32(addr) readl(addr)
190
191#define iowrite8(v, addr) writeb((v), (addr))
192#define iowrite16(v, addr) writew((v), (addr))
193#define iowrite32(v, addr) writel((v), (addr))
194
195#define ioread8_rep(p, dst, count) \
196 insb((unsigned long) (p), (dst), (count))
197#define ioread16_rep(p, dst, count) \
198 insw((unsigned long) (p), (dst), (count))
199#define ioread32_rep(p, dst, count) \
200 insl((unsigned long) (p), (dst), (count))
201
202#define iowrite8_rep(p, src, count) \
203 outsb((unsigned long) (p), (src), (count))
204#define iowrite16_rep(p, src, count) \
205 outsw((unsigned long) (p), (src), (count))
206#define iowrite32_rep(p, src, count) \
207 outsl((unsigned long) (p), (src), (count))
208
209
210#define IO_SPACE_LIMIT 0xffffffff
211
212#ifdef __KERNEL__
213
214#include <linux/vmalloc.h>
215#define __io_virt(x) ((void *) (x))
216
217/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
218struct pci_dev;
219extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
220static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
221{
222}
223
224/*
225 * Change virtual addresses to physical addresses and vv.
226 * These are pretty trivial
227 */
228static inline unsigned long virt_to_phys(volatile void *address)
229{
230 return __pa(address);
231}
232
233static inline void *phys_to_virt(unsigned long address)
234{
235 return __va(address);
236}
237
238/*
239 * Change "struct page" to physical address.
240 */
241static inline void *__ioremap(unsigned long offset, unsigned long size,
242 unsigned long flags)
243{
244 return (void *) offset;
245}
246
247static inline void *ioremap(unsigned long offset, unsigned long size)
248{
249 return (void *) offset;
250}
251
252/*
253 * This one maps high address device memory and turns off caching for that
254 * area. it's useful if some control registers are in such an area and write
255 * combining or read caching is not desirable:
256 */
257static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
258{
259 return (void *) (offset | 0x20000000);
260}
261
262#define ioremap_wc ioremap_nocache
263
264static inline void iounmap(void *addr)
265{
266}
267
268static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
269{
270 return (void __iomem *) port;
271}
272
273static inline void ioport_unmap(void __iomem *p)
274{
275}
276
277#define xlate_dev_kmem_ptr(p) ((void *) (p))
278#define xlate_dev_mem_ptr(p) ((void *) (p))
279
280/*
281 * PCI bus iomem addresses must be in the region 0x80000000-0x9fffffff
282 */
283static inline unsigned long virt_to_bus(volatile void *address)
284{
285 return ((unsigned long) address) & ~0x20000000;
286}
287
288static inline void *bus_to_virt(unsigned long address)
289{
290 return (void *) address;
291}
292
293#define page_to_bus page_to_phys
294
295#define memset_io(a, b, c) memset(__io_virt(a), (b), (c))
296#define memcpy_fromio(a, b, c) memcpy((a), __io_virt(b), (c))
297#define memcpy_toio(a, b, c) memcpy(__io_virt(a), (b), (c))
298
299#endif /* __KERNEL__ */
300
301#endif /* _ASM_IO_H */
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