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
|
/*
* The PCI Library -- Compiler-specific wrappers around x86 I/O port access instructions
*
* Copyright (c) 2023 Pali Rohár <pali@kernel.org>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#if defined(__GNUC__)
static inline unsigned char
intel_inb(unsigned short int port)
{
unsigned char value;
asm volatile ("inb %w1, %0" : "=a" (value) : "Nd" (port));
return value;
}
static inline unsigned short int
intel_inw(unsigned short int port)
{
unsigned short value;
asm volatile ("inw %w1, %0" : "=a" (value) : "Nd" (port));
return value;
}
static inline unsigned int
intel_inl(unsigned short int port)
{
u32 value;
asm volatile ("inl %w1, %0" : "=a" (value) : "Nd" (port));
return value;
}
static inline void
intel_outb(unsigned char value, unsigned short int port)
{
asm volatile ("outb %b0, %w1" : : "a" (value), "Nd" (port));
}
static inline void
intel_outw(unsigned short int value, unsigned short int port)
{
asm volatile ("outw %w0, %w1" : : "a" (value), "Nd" (port));
}
static inline void
intel_outl(u32 value, unsigned short int port)
{
asm volatile ("outl %0, %w1" : : "a" (value), "Nd" (port));
}
#elif defined(_MSC_VER)
#pragma intrinsic(_outp)
#pragma intrinsic(_outpw)
#pragma intrinsic(_outpd)
#pragma intrinsic(_inp)
#pragma intrinsic(_inpw)
#pragma intrinsic(_inpd)
#define intel_outb(x, y) _outp(y, x)
#define intel_outw(x, y) _outpw(y, x)
#define intel_outl(x, y) _outpd(y, x)
#define intel_inb(x) _inp(x)
#define intel_inw(x) _inpw(x)
#define intel_inl(x) _inpd(x)
#else
#error Do not know how to access I/O ports on this compiler
#endif
|
