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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-17 21:05:42 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-23 01:55:20 -0400
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /include/asm-x86/io_64.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/asm-x86/io_64.h')
-rw-r--r--include/asm-x86/io_64.h244
1 files changed, 0 insertions, 244 deletions
diff --git a/include/asm-x86/io_64.h b/include/asm-x86/io_64.h
deleted file mode 100644
index ee6e086b7dfe..000000000000
--- a/include/asm-x86/io_64.h
+++ /dev/null
@@ -1,244 +0,0 @@
1#ifndef ASM_X86__IO_64_H
2#define ASM_X86__IO_64_H
3
4
5/*
6 * This file contains the definitions for the x86 IO instructions
7 * inb/inw/inl/outb/outw/outl and the "string versions" of the same
8 * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
9 * versions of the single-IO instructions (inb_p/inw_p/..).
10 *
11 * This file is not meant to be obfuscating: it's just complicated
12 * to (a) handle it all in a way that makes gcc able to optimize it
13 * as well as possible and (b) trying to avoid writing the same thing
14 * over and over again with slight variations and possibly making a
15 * mistake somewhere.
16 */
17
18/*
19 * Thanks to James van Artsdalen for a better timing-fix than
20 * the two short jumps: using outb's to a nonexistent port seems
21 * to guarantee better timings even on fast machines.
22 *
23 * On the other hand, I'd like to be sure of a non-existent port:
24 * I feel a bit unsafe about using 0x80 (should be safe, though)
25 *
26 * Linus
27 */
28
29 /*
30 * Bit simplified and optimized by Jan Hubicka
31 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
32 *
33 * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
34 * isa_read[wl] and isa_write[wl] fixed
35 * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
36 */
37
38extern void native_io_delay(void);
39
40extern int io_delay_type;
41extern void io_delay_init(void);
42
43#if defined(CONFIG_PARAVIRT)
44#include <asm/paravirt.h>
45#else
46
47static inline void slow_down_io(void)
48{
49 native_io_delay();
50#ifdef REALLY_SLOW_IO
51 native_io_delay();
52 native_io_delay();
53 native_io_delay();
54#endif
55}
56#endif
57
58/*
59 * Talk about misusing macros..
60 */
61#define __OUT1(s, x) \
62static inline void out##s(unsigned x value, unsigned short port) {
63
64#define __OUT2(s, s1, s2) \
65asm volatile ("out" #s " %" s1 "0,%" s2 "1"
66
67#ifndef REALLY_SLOW_IO
68#define REALLY_SLOW_IO
69#define UNSET_REALLY_SLOW_IO
70#endif
71
72#define __OUT(s, s1, x) \
73 __OUT1(s, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
74 } \
75 __OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
76 slow_down_io(); \
77}
78
79#define __IN1(s) \
80static inline RETURN_TYPE in##s(unsigned short port) \
81{ \
82 RETURN_TYPE _v;
83
84#define __IN2(s, s1, s2) \
85 asm volatile ("in" #s " %" s2 "1,%" s1 "0"
86
87#define __IN(s, s1, i...) \
88 __IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
89 return _v; \
90 } \
91 __IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
92 slow_down_io(); \
93 return _v; }
94
95#ifdef UNSET_REALLY_SLOW_IO
96#undef REALLY_SLOW_IO
97#endif
98
99#define __INS(s) \
100static inline void ins##s(unsigned short port, void *addr, \
101 unsigned long count) \
102{ \
103 asm volatile ("rep ; ins" #s \
104 : "=D" (addr), "=c" (count) \
105 : "d" (port), "0" (addr), "1" (count)); \
106}
107
108#define __OUTS(s) \
109static inline void outs##s(unsigned short port, const void *addr, \
110 unsigned long count) \
111{ \
112 asm volatile ("rep ; outs" #s \
113 : "=S" (addr), "=c" (count) \
114 : "d" (port), "0" (addr), "1" (count)); \
115}
116
117#define RETURN_TYPE unsigned char
118__IN(b, "")
119#undef RETURN_TYPE
120#define RETURN_TYPE unsigned short
121__IN(w, "")
122#undef RETURN_TYPE
123#define RETURN_TYPE unsigned int
124__IN(l, "")
125#undef RETURN_TYPE
126
127__OUT(b, "b", char)
128__OUT(w, "w", short)
129__OUT(l, , int)
130
131__INS(b)
132__INS(w)
133__INS(l)
134
135__OUTS(b)
136__OUTS(w)
137__OUTS(l)
138
139#define IO_SPACE_LIMIT 0xffff
140
141#if defined(__KERNEL__) && defined(__x86_64__)
142
143#include <linux/vmalloc.h>
144
145#ifndef __i386__
146/*
147 * Change virtual addresses to physical addresses and vv.
148 * These are pretty trivial
149 */
150static inline unsigned long virt_to_phys(volatile void *address)
151{
152 return __pa(address);
153}
154
155static inline void *phys_to_virt(unsigned long address)
156{
157 return __va(address);
158}
159#endif
160
161/*
162 * Change "struct page" to physical address.
163 */
164#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
165
166#include <asm-generic/iomap.h>
167
168/*
169 * This one maps high address device memory and turns off caching for that area.
170 * it's useful if some control registers are in such an area and write combining
171 * or read caching is not desirable:
172 */
173extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
174extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
175extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
176 unsigned long prot_val);
177
178/*
179 * The default ioremap() behavior is non-cached:
180 */
181static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
182{
183 return ioremap_nocache(offset, size);
184}
185
186extern void iounmap(volatile void __iomem *addr);
187
188extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
189
190/*
191 * ISA I/O bus memory addresses are 1:1 with the physical address.
192 */
193#define isa_virt_to_bus virt_to_phys
194#define isa_page_to_bus page_to_phys
195#define isa_bus_to_virt phys_to_virt
196
197/*
198 * However PCI ones are not necessarily 1:1 and therefore these interfaces
199 * are forbidden in portable PCI drivers.
200 *
201 * Allow them on x86 for legacy drivers, though.
202 */
203#define virt_to_bus virt_to_phys
204#define bus_to_virt phys_to_virt
205
206void __memcpy_fromio(void *, unsigned long, unsigned);
207void __memcpy_toio(unsigned long, const void *, unsigned);
208
209static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
210 unsigned len)
211{
212 __memcpy_fromio(to, (unsigned long)from, len);
213}
214
215static inline void memcpy_toio(volatile void __iomem *to, const void *from,
216 unsigned len)
217{
218 __memcpy_toio((unsigned long)to, from, len);
219}
220
221void memset_io(volatile void __iomem *a, int b, size_t c);
222
223/*
224 * ISA space is 'always mapped' on a typical x86 system, no need to
225 * explicitly ioremap() it. The fact that the ISA IO space is mapped
226 * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
227 * are physical addresses. The following constant pointer can be
228 * used as the IO-area pointer (it can be iounmapped as well, so the
229 * analogy with PCI is quite large):
230 */
231#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
232
233#define flush_write_buffers()
234
235#define BIO_VMERGE_BOUNDARY iommu_bio_merge
236
237/*
238 * Convert a virtual cached pointer to an uncached pointer
239 */
240#define xlate_dev_kmem_ptr(p) p
241
242#endif /* __KERNEL__ */
243
244#endif /* ASM_X86__IO_64_H */