]>
Commit | Line | Data |
---|---|---|
1965aae3 PA |
1 | #ifndef _ASM_X86_IO_32_H |
2 | #define _ASM_X86_IO_32_H | |
1da177e4 | 3 | |
1da177e4 LT |
4 | #include <linux/string.h> |
5 | #include <linux/compiler.h> | |
6 | ||
7 | /* | |
8 | * This file contains the definitions for the x86 IO instructions | |
9 | * inb/inw/inl/outb/outw/outl and the "string versions" of the same | |
10 | * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing" | |
11 | * versions of the single-IO instructions (inb_p/inw_p/..). | |
12 | * | |
13 | * This file is not meant to be obfuscating: it's just complicated | |
14 | * to (a) handle it all in a way that makes gcc able to optimize it | |
15 | * as well as possible and (b) trying to avoid writing the same thing | |
16 | * over and over again with slight variations and possibly making a | |
17 | * mistake somewhere. | |
18 | */ | |
19 | ||
20 | /* | |
21 | * Thanks to James van Artsdalen for a better timing-fix than | |
22 | * the two short jumps: using outb's to a nonexistent port seems | |
23 | * to guarantee better timings even on fast machines. | |
24 | * | |
25 | * On the other hand, I'd like to be sure of a non-existent port: | |
26 | * I feel a bit unsafe about using 0x80 (should be safe, though) | |
27 | * | |
28 | * Linus | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Bit simplified and optimized by Jan Hubicka | |
33 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999. | |
34 | * | |
35 | * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added, | |
36 | * isa_read[wl] and isa_write[wl] fixed | |
37 | * - Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
38 | */ | |
39 | ||
1da177e4 LT |
40 | #define XQUAD_PORTIO_BASE 0xfe400000 |
41 | #define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */ | |
42 | ||
43 | #ifdef __KERNEL__ | |
44 | ||
45 | #include <asm-generic/iomap.h> | |
46 | ||
47 | #include <linux/vmalloc.h> | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * Convert a virtual cached pointer to an uncached pointer | |
51 | */ | |
52 | #define xlate_dev_kmem_ptr(p) p | |
53 | ||
3c215b66 AM |
54 | static inline void |
55 | memset_io(volatile void __iomem *addr, unsigned char val, int count) | |
1da177e4 | 56 | { |
3c215b66 | 57 | memset((void __force *)addr, val, count); |
1da177e4 | 58 | } |
3c215b66 AM |
59 | |
60 | static inline void | |
61 | memcpy_fromio(void *dst, const volatile void __iomem *src, int count) | |
1da177e4 | 62 | { |
3c215b66 | 63 | __memcpy(dst, (const void __force *)src, count); |
1da177e4 | 64 | } |
3c215b66 AM |
65 | |
66 | static inline void | |
67 | memcpy_toio(volatile void __iomem *dst, const void *src, int count) | |
1da177e4 | 68 | { |
3c215b66 | 69 | __memcpy((void __force *)dst, src, count); |
1da177e4 LT |
70 | } |
71 | ||
72 | /* | |
73 | * ISA space is 'always mapped' on a typical x86 system, no need to | |
74 | * explicitly ioremap() it. The fact that the ISA IO space is mapped | |
75 | * to PAGE_OFFSET is pure coincidence - it does not mean ISA values | |
76 | * are physical addresses. The following constant pointer can be | |
77 | * used as the IO-area pointer (it can be iounmapped as well, so the | |
78 | * analogy with PCI is quite large): | |
79 | */ | |
80 | #define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET)) | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * Cache management | |
84 | * | |
85 | * This needed for two cases | |
86 | * 1. Out of order aware processors | |
87 | * 2. Accidentally out of order processors (PPro errata #51) | |
88 | */ | |
dcd215c9 | 89 | |
1da177e4 LT |
90 | #if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE) |
91 | ||
92 | static inline void flush_write_buffers(void) | |
93 | { | |
dcd215c9 | 94 | asm volatile("lock; addl $0,0(%%esp)": : :"memory"); |
1da177e4 LT |
95 | } |
96 | ||
1da177e4 LT |
97 | #else |
98 | ||
622a9edd | 99 | #define flush_write_buffers() do { } while (0) |
1da177e4 LT |
100 | |
101 | #endif | |
102 | ||
103 | #endif /* __KERNEL__ */ | |
104 | ||
b02aae9c | 105 | extern void native_io_delay(void); |
90a0a06a | 106 | |
6e7c4025 IM |
107 | extern int io_delay_type; |
108 | extern void io_delay_init(void); | |
109 | ||
d3561b7f RR |
110 | #if defined(CONFIG_PARAVIRT) |
111 | #include <asm/paravirt.h> | |
1da177e4 | 112 | #else |
d3561b7f | 113 | |
dcd215c9 JP |
114 | static inline void slow_down_io(void) |
115 | { | |
90a0a06a | 116 | native_io_delay(); |
1da177e4 | 117 | #ifdef REALLY_SLOW_IO |
90a0a06a RR |
118 | native_io_delay(); |
119 | native_io_delay(); | |
120 | native_io_delay(); | |
1da177e4 | 121 | #endif |
1da177e4 LT |
122 | } |
123 | ||
d3561b7f RR |
124 | #endif |
125 | ||
dcd215c9 JP |
126 | #define __BUILDIO(bwl, bw, type) \ |
127 | static inline void out##bwl(unsigned type value, int port) \ | |
128 | { \ | |
129 | out##bwl##_local(value, port); \ | |
130 | } \ | |
131 | \ | |
132 | static inline unsigned type in##bwl(int port) \ | |
133 | { \ | |
134 | return in##bwl##_local(port); \ | |
1da177e4 | 135 | } |
1da177e4 | 136 | |
dcd215c9 JP |
137 | #define BUILDIO(bwl, bw, type) \ |
138 | static inline void out##bwl##_local(unsigned type value, int port) \ | |
139 | { \ | |
140 | asm volatile("out" #bwl " %" #bw "0, %w1" \ | |
141 | : : "a"(value), "Nd"(port)); \ | |
142 | } \ | |
143 | \ | |
144 | static inline unsigned type in##bwl##_local(int port) \ | |
145 | { \ | |
146 | unsigned type value; \ | |
147 | asm volatile("in" #bwl " %w1, %" #bw "0" \ | |
148 | : "=a"(value) : "Nd"(port)); \ | |
149 | return value; \ | |
150 | } \ | |
151 | \ | |
152 | static inline void out##bwl##_local_p(unsigned type value, int port) \ | |
153 | { \ | |
154 | out##bwl##_local(value, port); \ | |
155 | slow_down_io(); \ | |
156 | } \ | |
157 | \ | |
158 | static inline unsigned type in##bwl##_local_p(int port) \ | |
159 | { \ | |
160 | unsigned type value = in##bwl##_local(port); \ | |
161 | slow_down_io(); \ | |
162 | return value; \ | |
163 | } \ | |
164 | \ | |
165 | __BUILDIO(bwl, bw, type) \ | |
166 | \ | |
167 | static inline void out##bwl##_p(unsigned type value, int port) \ | |
168 | { \ | |
169 | out##bwl(value, port); \ | |
170 | slow_down_io(); \ | |
171 | } \ | |
172 | \ | |
173 | static inline unsigned type in##bwl##_p(int port) \ | |
174 | { \ | |
175 | unsigned type value = in##bwl(port); \ | |
176 | slow_down_io(); \ | |
177 | return value; \ | |
178 | } \ | |
179 | \ | |
180 | static inline void outs##bwl(int port, const void *addr, unsigned long count) \ | |
181 | { \ | |
182 | asm volatile("rep; outs" #bwl \ | |
183 | : "+S"(addr), "+c"(count) : "d"(port)); \ | |
184 | } \ | |
185 | \ | |
186 | static inline void ins##bwl(int port, void *addr, unsigned long count) \ | |
187 | { \ | |
188 | asm volatile("rep; ins" #bwl \ | |
189 | : "+D"(addr), "+c"(count) : "d"(port)); \ | |
1da177e4 LT |
190 | } |
191 | ||
dcd215c9 JP |
192 | BUILDIO(b, b, char) |
193 | BUILDIO(w, w, short) | |
194 | BUILDIO(l, , int) | |
1da177e4 | 195 | |
1965aae3 | 196 | #endif /* _ASM_X86_IO_32_H */ |