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
|
#ifndef _X86_CPU_H
#define _X86_CPU_H
#include <klibc/compiler.h>
#include <inttypes.h>
#include <stdbool.h>
static inline bool cpu_has_eflag(unsigned long flag)
{
unsigned long f1, f2;
asm("pushf ; "
"pushf ; "
"pop %0 ; "
"mov %0,%1 ; "
"xor %2,%1 ; "
"push %1 ; "
"popf ; "
"pushf ; "
"pop %1 ; "
"popf"
: "=r" (f1), "=r" (f2) : "ri" (flag));
return !!((f1 ^ f2) & flag);
}
static inline uint64_t rdtsc(void)
{
uint32_t eax, edx;
asm volatile("rdtsc" : "=a" (eax), "=d" (edx));
return eax + ((uint64_t)edx << 32);
}
static inline uint32_t rdtscl(void)
{
uint32_t v;
asm volatile("rdtsc" : "=a" (v) : : "edx");
return v;
}
static inline void cpuid_count(uint32_t op, uint32_t cnt,
uint32_t *eax, uint32_t *ebx,
uint32_t *ecx, uint32_t *edx)
{
#if defined(__i386__) && defined(__PIC__)
asm volatile("movl %%ebx,%1 ; "
"cpuid ; "
"xchgl %1,%%ebx"
: "=a" (*eax), "=SD" (*ebx), "=c" (*ecx), "=d" (*edx)
: "a"(op), "c"(cnt));
#else
asm volatile("cpuid"
: "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
: "a"(op), "c"(cnt));
#endif
}
static inline void cpuid(uint32_t op,
uint32_t *eax, uint32_t *ebx,
uint32_t *ecx, uint32_t *edx)
{
cpuid_count(op, 0, eax, ebx, ecx, edx);
}
static inline __constfunc uint32_t cpuid_eax(uint32_t level)
{
uint32_t eax, ebx, ecx, edx;
cpuid_count(level, 0, &eax, &ebx, &ecx, &edx);
return eax;
}
static inline __constfunc uint32_t cpuid_ebx(uint32_t level)
{
uint32_t eax, ebx, ecx, edx;
cpuid_count(level, 0, &eax, &ebx, &ecx, &edx);
return ebx;
}
static inline __constfunc uint32_t cpuid_ecx(uint32_t level)
{
uint32_t eax, ebx, ecx, edx;
cpuid_count(level, 0, &eax, &ebx, &ecx, &edx);
return ecx;
}
static inline __constfunc uint32_t cpuid_edx(uint32_t level)
{
uint32_t eax, ebx, ecx, edx;
cpuid_count(level, 0, &eax, &ebx, &ecx, &edx);
return edx;
}
static inline uint64_t rdmsr(uint32_t msr)
{
uint32_t eax, edx;
asm volatile("rdmsr" : "=a" (eax), "=d" (edx) : "c" (msr));
return eax + ((uint64_t)edx << 32);
}
static inline void wrmsr(uint64_t v, uint32_t msr)
{
uint32_t eax = v;
uint32_t edx = v >> 32;
asm volatile("wrmsr" : : "a" (eax), "d" (edx), "c" (msr));
}
static inline unsigned long long get_cr0(void)
{
unsigned long v;
asm volatile("mov %%cr0,%0" : "=r" (v));
return v;
}
static inline void set_cr0(unsigned long v)
{
asm volatile("mov %0,%%cr0" : : "r" (v));
}
static inline unsigned long get_cr4(void)
{
unsigned long v;
asm volatile("mov %%cr4,%0" : "=r" (v));
return v;
}
static inline void set_cr4(unsigned long v)
{
asm volatile("mov %0,%%cr4" : : "r" (v));
}
static inline uint32_t get_mxcsr(void)
{
uint32_t v;
asm("stmxcsr %0" : "=m" (v));
return v;
}
static inline void set_mxcsr(uint32_t v)
{
asm volatile("ldmxcsr %0" : : "m" (v));
}
static inline void fninit(void)
{
asm volatile("fninit");
}
static inline void cpu_relax(void)
{
asm volatile("rep ; nop");
}
static inline void hlt(void)
{
asm volatile("hlt" : : : "memory");
}
static inline void cli(void)
{
asm volatile("cli" : : : "memory");
}
static inline void sti(void)
{
asm volatile("sti" : : : "memory");
}
static inline unsigned long get_eflags(void)
{
unsigned long v;
asm volatile("pushf ; pop %0" : "=rm" (v));
return v;
}
static inline void set_eflags(unsigned long v)
{
asm volatile("push %0 ; popf" : : "g" (v) : "memory");
}
typedef unsigned long irq_state_t;
static inline irq_state_t irq_state(void)
{
return get_eflags();
}
static inline irq_state_t irq_save(void)
{
irq_state_t v = irq_state();
cli();
return v;
}
static inline void irq_restore(irq_state_t v)
{
set_eflags(v);
}
#endif /* _X86_CPU_H */
|
