5113f6f70
 김현기
kernel add
|
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
|
#ifndef _ASM_SCORE_IRQFLAGS_H
#define _ASM_SCORE_IRQFLAGS_H
#ifndef __ASSEMBLY__
#include <linux/types.h>
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
asm volatile(
" mfcr r8, cr0
"
" nop
"
" nop
"
" mv %0, r8
"
" nop
"
" nop
"
" nop
"
" nop
"
" nop
"
" ldi r9, 0x1
"
" and %0, %0, r9
"
: "=r" (flags)
:
: "r8", "r9");
return flags;
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
asm volatile(
" mfcr r8, cr0
"
" li r9, 0xfffffffe
"
" nop
"
" mv %0, r8
"
" and r8, r8, r9
"
" mtcr r8, cr0
"
" nop
"
" nop
"
" nop
"
" nop
"
" nop
"
: "=r" (flags)
:
: "r8", "r9", "memory");
return flags;
}
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile(
" mfcr r8, cr0
"
" ldi r9, 0x1
"
" and %0, %0, r9
"
" or r8, r8, %0
"
" mtcr r8, cr0
"
" nop
"
" nop
"
" nop
"
" nop
"
" nop
"
:
: "r"(flags)
: "r8", "r9", "memory");
}
static inline void arch_local_irq_enable(void)
{
asm volatile(
" mfcr r8,cr0
"
" nop
"
" nop
"
" ori r8,0x1
"
" mtcr r8,cr0
"
" nop
"
" nop
"
" nop
"
" nop
"
" nop
"
:
:
: "r8", "memory");
}
static inline void arch_local_irq_disable(void)
{
asm volatile(
" mfcr r8,cr0
"
" nop
"
" nop
"
" srli r8,r8,1
"
" slli r8,r8,1
"
" mtcr r8,cr0
"
" nop
"
" nop
"
" nop
"
" nop
"
" nop
"
:
:
: "r8", "memory");
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & 1);
}
static inline bool arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#endif /* __ASSEMBLY__ */
#endif /* _ASM_SCORE_IRQFLAGS_H */
|