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471101a1 | 1 | /* Copyright (C) 1996-2012 Free Software Foundation, Inc. |
40ff7949 AJ |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
40ff7949 AJ |
17 | |
18 | #ifndef _SYS_IO_H | |
19 | #define _SYS_IO_H 1 | |
20 | ||
21 | #include <features.h> | |
22 | ||
23 | __BEGIN_DECLS | |
24 | ||
25 | /* If TURN_ON is TRUE, request for permission to do direct i/o on the | |
26 | port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O | |
27 | permission off for that range. This call requires root privileges. | |
28 | ||
29 | Portability note: not all Linux platforms support this call. Most | |
30 | platforms based on the PC I/O architecture probably will, however. | |
31 | E.g., Linux/Alpha for Alpha PCs supports this. */ | |
32 | extern int ioperm (unsigned long int __from, unsigned long int __num, | |
33 | int __turn_on) __THROW; | |
34 | ||
35 | /* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to | |
36 | access any I/O port is granted. This call requires root | |
37 | privileges. */ | |
38 | extern int iopl (int __level) __THROW; | |
39 | ||
40 | #if defined __GNUC__ && __GNUC__ >= 2 | |
41 | ||
42 | static __inline unsigned char | |
d82a27f8 | 43 | inb (unsigned short int __port) |
40ff7949 AJ |
44 | { |
45 | unsigned char _v; | |
46 | ||
d82a27f8 | 47 | __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
48 | return _v; |
49 | } | |
50 | ||
51 | static __inline unsigned char | |
d82a27f8 | 52 | inb_p (unsigned short int __port) |
40ff7949 AJ |
53 | { |
54 | unsigned char _v; | |
55 | ||
d82a27f8 | 56 | __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
57 | return _v; |
58 | } | |
59 | ||
60 | static __inline unsigned short int | |
d82a27f8 | 61 | inw (unsigned short int __port) |
40ff7949 AJ |
62 | { |
63 | unsigned short _v; | |
64 | ||
d82a27f8 | 65 | __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
66 | return _v; |
67 | } | |
68 | ||
69 | static __inline unsigned short int | |
d82a27f8 | 70 | inw_p (unsigned short int __port) |
40ff7949 AJ |
71 | { |
72 | unsigned short int _v; | |
73 | ||
d82a27f8 | 74 | __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
75 | return _v; |
76 | } | |
77 | ||
78 | static __inline unsigned int | |
d82a27f8 | 79 | inl (unsigned short int __port) |
40ff7949 AJ |
80 | { |
81 | unsigned int _v; | |
82 | ||
d82a27f8 | 83 | __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
84 | return _v; |
85 | } | |
86 | ||
87 | static __inline unsigned int | |
d82a27f8 | 88 | inl_p (unsigned short int __port) |
40ff7949 AJ |
89 | { |
90 | unsigned int _v; | |
d82a27f8 | 91 | __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
40ff7949 AJ |
92 | return _v; |
93 | } | |
94 | ||
95 | static __inline void | |
d82a27f8 | 96 | outb (unsigned char __value, unsigned short int __port) |
40ff7949 | 97 | { |
d82a27f8 | 98 | __asm__ __volatile__ ("outb %b0,%w1": :"a" (__value), "Nd" (__port)); |
40ff7949 AJ |
99 | } |
100 | ||
101 | static __inline void | |
d82a27f8 | 102 | outb_p (unsigned char __value, unsigned short int __port) |
40ff7949 | 103 | { |
d82a27f8 JJ |
104 | __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (__value), |
105 | "Nd" (__port)); | |
40ff7949 AJ |
106 | } |
107 | ||
108 | static __inline void | |
d82a27f8 | 109 | outw (unsigned short int __value, unsigned short int __port) |
40ff7949 | 110 | { |
d82a27f8 | 111 | __asm__ __volatile__ ("outw %w0,%w1": :"a" (__value), "Nd" (__port)); |
40ff7949 AJ |
112 | |
113 | } | |
114 | ||
115 | static __inline void | |
d82a27f8 | 116 | outw_p (unsigned short int __value, unsigned short int __port) |
40ff7949 | 117 | { |
d82a27f8 JJ |
118 | __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (__value), |
119 | "Nd" (__port)); | |
40ff7949 AJ |
120 | } |
121 | ||
122 | static __inline void | |
d82a27f8 | 123 | outl (unsigned int __value, unsigned short int __port) |
40ff7949 | 124 | { |
d82a27f8 | 125 | __asm__ __volatile__ ("outl %0,%w1": :"a" (__value), "Nd" (__port)); |
40ff7949 AJ |
126 | } |
127 | ||
128 | static __inline void | |
d82a27f8 | 129 | outl_p (unsigned int __value, unsigned short int __port) |
40ff7949 | 130 | { |
d82a27f8 JJ |
131 | __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (__value), |
132 | "Nd" (__port)); | |
40ff7949 AJ |
133 | } |
134 | ||
135 | static __inline void | |
471101a1 | 136 | insb (unsigned short int __port, void *__addr, unsigned long int __count) |
40ff7949 | 137 | { |
471101a1 L |
138 | __asm__ __volatile__ ("cld ; rep ; insb":"=D" (__addr), "=c" (__count) |
139 | :"d" (__port), "0" (__addr), "1" (__count)); | |
40ff7949 AJ |
140 | } |
141 | ||
142 | static __inline void | |
471101a1 | 143 | insw (unsigned short int __port, void *__addr, unsigned long int __count) |
40ff7949 | 144 | { |
471101a1 L |
145 | __asm__ __volatile__ ("cld ; rep ; insw":"=D" (__addr), "=c" (__count) |
146 | :"d" (__port), "0" (__addr), "1" (__count)); | |
40ff7949 AJ |
147 | } |
148 | ||
149 | static __inline void | |
471101a1 | 150 | insl (unsigned short int __port, void *__addr, unsigned long int __count) |
40ff7949 | 151 | { |
471101a1 L |
152 | __asm__ __volatile__ ("cld ; rep ; insl":"=D" (__addr), "=c" (__count) |
153 | :"d" (__port), "0" (__addr), "1" (__count)); | |
40ff7949 AJ |
154 | } |
155 | ||
156 | static __inline void | |
471101a1 L |
157 | outsb (unsigned short int __port, const void *__addr, |
158 | unsigned long int __count) | |
40ff7949 | 159 | { |
471101a1 L |
160 | __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (__addr), "=c" (__count) |
161 | :"d" (__port), "0" (__addr), "1" (__count)); | |
40ff7949 AJ |
162 | } |
163 | ||
164 | static __inline void | |
471101a1 L |
165 | outsw (unsigned short int __port, const void *__addr, |
166 | unsigned long int __count) | |
40ff7949 | 167 | { |
f34a1c6f | 168 | __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (__addr), "=c" (__count) |
12e5e0f3 | 169 | :"d" (__port), "0" (__addr), "1" (__count)); |
40ff7949 AJ |
170 | } |
171 | ||
172 | static __inline void | |
471101a1 L |
173 | outsl (unsigned short int __port, const void *__addr, |
174 | unsigned long int __count) | |
40ff7949 | 175 | { |
471101a1 L |
176 | __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (__addr), "=c" (__count) |
177 | :"d" (__port), "0" (__addr), "1" (__count)); | |
40ff7949 AJ |
178 | } |
179 | ||
180 | #endif /* GNU C */ | |
181 | ||
182 | __END_DECLS | |
183 | #endif /* _SYS_IO_H */ |