1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* $OpenBSD: pio.h,v 1.1 2004/01/28 01:39:39 mickey Exp $ */
/* $NetBSD: pio.h,v 1.2 2003/02/27 11:22:46 fvdl Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _X86_PIO_H_
#define _X86_PIO_H_
/*
* Functions to provide access to x86 programmed I/O instructions.
*
* The in[bwl]() and out[bwl]() functions are split into two varieties: one to
* use a small, constant, 8-bit port number, and another to use a large or
* variable port number. The former can be compiled as a smaller instruction.
*/
#ifdef __OPTIMIZE__
#define __use_immediate_port(port) \
(__builtin_constant_p((port)) && (port) < 0x100)
#else
#define __use_immediate_port(port) 0
#endif
#define inb(port) \
(/* CONSTCOND */ __use_immediate_port(port) ? __inbc(port) : __inb(port))
static __inline u_int8_t
__inbc(unsigned port)
{
u_int8_t data;
__asm __volatile("inb %w1,%0" : "=a" (data) : "id" (port));
return data;
}
static __inline u_int8_t
__inb(unsigned port)
{
u_int8_t data;
__asm __volatile("inb %w1,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insb(unsigned port, void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\tinsb" :
"=D" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt) :
"memory");
}
#define inw(port) \
(/* CONSTCOND */ __use_immediate_port(port) ? __inwc(port) : __inw(port))
static __inline u_int16_t
__inwc(unsigned port)
{
u_int16_t data;
__asm __volatile("inw %w1,%0" : "=a" (data) : "id" (port));
return data;
}
static __inline u_int16_t
__inw(unsigned port)
{
u_int16_t data;
__asm __volatile("inw %w1,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insw(unsigned port, void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\tinsw" :
"=D" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt) :
"memory");
}
#define inl(port) \
(/* CONSTCOND */ __use_immediate_port(port) ? __inlc(port) : __inl(port))
static __inline u_int32_t
__inlc(unsigned port)
{
u_int32_t data;
__asm __volatile("inl %w1,%0" : "=a" (data) : "id" (port));
return data;
}
static __inline u_int32_t
__inl(unsigned port)
{
u_int32_t data;
__asm __volatile("inl %w1,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insl(unsigned port, void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\tinsl" :
"=D" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt) :
"memory");
}
#define outb(port, data) \
(/* CONSTCOND */__use_immediate_port(port) ? __outbc(port, data) : \
__outb(port, data))
static __inline void
__outbc(unsigned port, u_int8_t data)
{
__asm __volatile("outb %0,%w1" : : "a" (data), "id" (port));
}
static __inline void
__outb(unsigned port, u_int8_t data)
{
__asm __volatile("outb %0,%w1" : : "a" (data), "d" (port));
}
static __inline void
outsb(unsigned port, const void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\toutsb" :
"=S" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt));
}
#define outw(port, data) \
(/* CONSTCOND */ __use_immediate_port(port) ? __outwc(port, data) : \
__outw(port, data))
static __inline void
__outwc(unsigned port, u_int16_t data)
{
__asm __volatile("outw %0,%w1" : : "a" (data), "id" (port));
}
static __inline void
__outw(unsigned port, u_int16_t data)
{
__asm __volatile("outw %0,%w1" : : "a" (data), "d" (port));
}
static __inline void
outsw(unsigned port, const void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\toutsw" :
"=S" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt));
}
#define outl(port, data) \
(/* CONSTCOND */ __use_immediate_port(port) ? __outlc(port, data) : \
__outl(port, data))
static __inline void
__outlc(unsigned port, u_int32_t data)
{
__asm __volatile("outl %0,%w1" : : "a" (data), "id" (port));
}
static __inline void
__outl(unsigned port, u_int32_t data)
{
__asm __volatile("outl %0,%w1" : : "a" (data), "d" (port));
}
static __inline void
outsl(unsigned port, const void *addr, int cnt)
{
void *dummy1;
int dummy2;
__asm __volatile("cld\n\trepne\n\toutsl" :
"=S" (dummy1), "=c" (dummy2) :
"d" (port), "0" (addr), "1" (cnt));
}
#endif /* _X86_PIO_H_ */
|
