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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef ARCH_CPUID_H
#define ARCH_CPUID_H
#include <types.h>
struct cpuid_result {
uint32_t eax;
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
};
/*
* Generic CPUID function
*/
static inline struct cpuid_result cpuid(int op)
{
struct cpuid_result result;
asm volatile(
"mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (result.eax),
"=S" (result.ebx),
"=c" (result.ecx),
"=d" (result.edx)
: "0" (op)
: "edi");
return result;
}
/*
* Generic Extended CPUID function
*/
static inline struct cpuid_result cpuid_ext(int op, unsigned int ecx)
{
struct cpuid_result result;
asm volatile(
"mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (result.eax),
"=S" (result.ebx),
"=c" (result.ecx),
"=d" (result.edx)
: "0" (op), "2" (ecx)
: "edi");
return result;
}
/*
* CPUID functions returning a single datum
*/
static inline unsigned int cpuid_eax(unsigned int op)
{
unsigned int eax;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax)
: "0" (op)
: "ecx", "edx", "edi");
return eax;
}
static inline unsigned int cpuid_ebx(unsigned int op)
{
unsigned int eax, ebx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=S" (ebx)
: "0" (op)
: "ecx", "edx", "edi");
return ebx;
}
static inline unsigned int cpuid_ecx(unsigned int op)
{
unsigned int eax, ecx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=c" (ecx)
: "0" (op)
: "edx", "edi");
return ecx;
}
static inline unsigned int cpuid_edx(unsigned int op)
{
unsigned int eax, edx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=d" (edx)
: "0" (op)
: "ecx", "edi");
return edx;
}
#endif /* ARCH_CPUID_H */
|