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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 | ||
40 | #define IO_SPACE_LIMIT 0xffff | |
41 | ||
42 | #define XQUAD_PORTIO_BASE 0xfe400000 | |
43 | #define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */ | |
44 | ||
45 | #ifdef __KERNEL__ | |
46 | ||
47 | #include <asm-generic/iomap.h> | |
48 | ||
49 | #include <linux/vmalloc.h> | |
50 | ||
1da177e4 LT |
51 | /* |
52 | * Convert a virtual cached pointer to an uncached pointer | |
53 | */ | |
54 | #define xlate_dev_kmem_ptr(p) p | |
55 | ||
3c215b66 AM |
56 | static inline void |
57 | memset_io(volatile void __iomem *addr, unsigned char val, int count) | |
1da177e4 | 58 | { |
3c215b66 | 59 | memset((void __force *)addr, val, count); |
1da177e4 | 60 | } |
3c215b66 AM |
61 | |
62 | static inline void | |
63 | memcpy_fromio(void *dst, const volatile void __iomem *src, int count) | |
1da177e4 | 64 | { |
3c215b66 | 65 | __memcpy(dst, (const void __force *)src, count); |
1da177e4 | 66 | } |
3c215b66 AM |
67 | |
68 | static inline void | |
69 | memcpy_toio(volatile void __iomem *dst, const void *src, int count) | |
1da177e4 | 70 | { |
3c215b66 | 71 | __memcpy((void __force *)dst, src, count); |
1da177e4 LT |
72 | } |
73 | ||
74 | /* | |
75 | * ISA space is 'always mapped' on a typical x86 system, no need to | |
76 | * explicitly ioremap() it. The fact that the ISA IO space is mapped | |
77 | * to PAGE_OFFSET is pure coincidence - it does not mean ISA values | |
78 | * are physical addresses. The following constant pointer can be | |
79 | * used as the IO-area pointer (it can be iounmapped as well, so the | |
80 | * analogy with PCI is quite large): | |
81 | */ | |
82 | #define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET)) | |
83 | ||
1da177e4 LT |
84 | /* |
85 | * Cache management | |
86 | * | |
87 | * This needed for two cases | |
88 | * 1. Out of order aware processors | |
89 | * 2. Accidentally out of order processors (PPro errata #51) | |
90 | */ | |
dcd215c9 | 91 | |
1da177e4 LT |
92 | #if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE) |
93 | ||
94 | static inline void flush_write_buffers(void) | |
95 | { | |
dcd215c9 | 96 | asm volatile("lock; addl $0,0(%%esp)": : :"memory"); |
1da177e4 LT |
97 | } |
98 | ||
1da177e4 LT |
99 | #else |
100 | ||
622a9edd | 101 | #define flush_write_buffers() do { } while (0) |
1da177e4 LT |
102 | |
103 | #endif | |
104 | ||
105 | #endif /* __KERNEL__ */ | |
106 | ||
b02aae9c | 107 | extern void native_io_delay(void); |
90a0a06a | 108 | |
6e7c4025 IM |
109 | extern int io_delay_type; |
110 | extern void io_delay_init(void); | |
111 | ||
d3561b7f RR |
112 | #if defined(CONFIG_PARAVIRT) |
113 | #include <asm/paravirt.h> | |
1da177e4 | 114 | #else |
d3561b7f | 115 | |
dcd215c9 JP |
116 | static inline void slow_down_io(void) |
117 | { | |
90a0a06a | 118 | native_io_delay(); |
1da177e4 | 119 | #ifdef REALLY_SLOW_IO |
90a0a06a RR |
120 | native_io_delay(); |
121 | native_io_delay(); | |
122 | native_io_delay(); | |
1da177e4 | 123 | #endif |
1da177e4 LT |
124 | } |
125 | ||
d3561b7f RR |
126 | #endif |
127 | ||
dcd215c9 JP |
128 | #define __BUILDIO(bwl, bw, type) \ |
129 | static inline void out##bwl(unsigned type value, int port) \ | |
130 | { \ | |
131 | out##bwl##_local(value, port); \ | |
132 | } \ | |
133 | \ | |
134 | static inline unsigned type in##bwl(int port) \ | |
135 | { \ | |
136 | return in##bwl##_local(port); \ | |
1da177e4 | 137 | } |
1da177e4 | 138 | |
dcd215c9 JP |
139 | #define BUILDIO(bwl, bw, type) \ |
140 | static inline void out##bwl##_local(unsigned type value, int port) \ | |
141 | { \ | |
142 | asm volatile("out" #bwl " %" #bw "0, %w1" \ | |
143 | : : "a"(value), "Nd"(port)); \ | |
144 | } \ | |
145 | \ | |
146 | static inline unsigned type in##bwl##_local(int port) \ | |
147 | { \ | |
148 | unsigned type value; \ | |
149 | asm volatile("in" #bwl " %w1, %" #bw "0" \ | |
150 | : "=a"(value) : "Nd"(port)); \ | |
151 | return value; \ | |
152 | } \ | |
153 | \ | |
154 | static inline void out##bwl##_local_p(unsigned type value, int port) \ | |
155 | { \ | |
156 | out##bwl##_local(value, port); \ | |
157 | slow_down_io(); \ | |
158 | } \ | |
159 | \ | |
160 | static inline unsigned type in##bwl##_local_p(int port) \ | |
161 | { \ | |
162 | unsigned type value = in##bwl##_local(port); \ | |
163 | slow_down_io(); \ | |
164 | return value; \ | |
165 | } \ | |
166 | \ | |
167 | __BUILDIO(bwl, bw, type) \ | |
168 | \ | |
169 | static inline void out##bwl##_p(unsigned type value, int port) \ | |
170 | { \ | |
171 | out##bwl(value, port); \ | |
172 | slow_down_io(); \ | |
173 | } \ | |
174 | \ | |
175 | static inline unsigned type in##bwl##_p(int port) \ | |
176 | { \ | |
177 | unsigned type value = in##bwl(port); \ | |
178 | slow_down_io(); \ | |
179 | return value; \ | |
180 | } \ | |
181 | \ | |
182 | static inline void outs##bwl(int port, const void *addr, unsigned long count) \ | |
183 | { \ | |
184 | asm volatile("rep; outs" #bwl \ | |
185 | : "+S"(addr), "+c"(count) : "d"(port)); \ | |
186 | } \ | |
187 | \ | |
188 | static inline void ins##bwl(int port, void *addr, unsigned long count) \ | |
189 | { \ | |
190 | asm volatile("rep; ins" #bwl \ | |
191 | : "+D"(addr), "+c"(count) : "d"(port)); \ | |
1da177e4 LT |
192 | } |
193 | ||
dcd215c9 JP |
194 | BUILDIO(b, b, char) |
195 | BUILDIO(w, w, short) | |
196 | BUILDIO(l, , int) | |
1da177e4 | 197 | |
1965aae3 | 198 | #endif /* _ASM_X86_IO_32_H */ |