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
|
#ifndef __ASM_X86_PROCESSOR_H
#define __ASM_X86_PROCESSOR_H
#include <asm/processor-flags.h>
#include <asm/page.h>
#include <asm/system.h>
static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
/* ecx is often an input as well as an output. */
__asm__("cpuid"
: "=a" (*eax),
"=b" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "0" (*eax), "2" (*ecx));
}
static inline void load_cr3(pgd_t *pgdir)
{
write_cr3(__pa(pgdir));
}
#ifdef CONFIG_X86_32
# include "processor_32.h"
#else
# include "processor_64.h"
#endif
static inline unsigned long native_get_debugreg(int regno)
{
unsigned long val = 0; /* Damn you, gcc! */
switch (regno) {
case 0:
asm("mov %%db0, %0" :"=r" (val)); break;
case 1:
asm("mov %%db1, %0" :"=r" (val)); break;
case 2:
asm("mov %%db2, %0" :"=r" (val)); break;
case 3:
asm("mov %%db3, %0" :"=r" (val)); break;
case 6:
asm("mov %%db6, %0" :"=r" (val)); break;
case 7:
asm("mov %%db7, %0" :"=r" (val)); break;
default:
BUG();
}
return val;
}
static inline void native_set_debugreg(int regno, unsigned long value)
{
switch (regno) {
case 0:
asm("mov %0,%%db0" : /* no output */ :"r" (value));
break;
case 1:
asm("mov %0,%%db1" : /* no output */ :"r" (value));
break;
case 2:
asm("mov %0,%%db2" : /* no output */ :"r" (value));
break;
case 3:
asm("mov %0,%%db3" : /* no output */ :"r" (value));
break;
case 6:
asm("mov %0,%%db6" : /* no output */ :"r" (value));
break;
case 7:
asm("mov %0,%%db7" : /* no output */ :"r" (value));
break;
default:
BUG();
}
}
#ifndef CONFIG_PARAVIRT
#define __cpuid native_cpuid
#define paravirt_enabled() 0
/*
* These special macros can be used to get or set a debugging register
*/
#define get_debugreg(var, register) \
(var) = native_get_debugreg(register)
#define set_debugreg(value, register) \
native_set_debugreg(register, value)
#endif /* CONFIG_PARAVIRT */
/*
* Save the cr4 feature set we're using (ie
* Pentium 4MB enable and PPro Global page
* enable), so that any CPU's that boot up
* after us can get the correct flags.
*/
extern unsigned long mmu_cr4_features;
static inline void set_in_cr4(unsigned long mask)
{
unsigned cr4;
mmu_cr4_features |= mask;
cr4 = read_cr4();
cr4 |= mask;
write_cr4(cr4);
}
static inline void clear_in_cr4(unsigned long mask)
{
unsigned cr4;
mmu_cr4_features &= ~mask;
cr4 = read_cr4();
cr4 &= ~mask;
write_cr4(cr4);
}
/*
* Generic CPUID function
* clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
* resulting in stale register contents being returned.
*/
static inline void cpuid(unsigned int op,
unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
*eax = op;
*ecx = 0;
__cpuid(eax, ebx, ecx, edx);
}
/* Some CPUID calls want 'count' to be placed in ecx */
static inline void cpuid_count(unsigned int op, int count,
unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
*eax = op;
*ecx = count;
__cpuid(eax, ebx, ecx, edx);
}
/*
* CPUID functions returning a single datum
*/
static inline unsigned int cpuid_eax(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return eax;
}
static inline unsigned int cpuid_ebx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return ebx;
}
static inline unsigned int cpuid_ecx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return ecx;
}
static inline unsigned int cpuid_edx(unsigned int op)
{
unsigned int eax, ebx, ecx, edx;
cpuid(op, &eax, &ebx, &ecx, &edx);
return edx;
}
#endif
|
