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
|
/*
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_MICROBLAZE_IRQFLAGS_H
#define _ASM_MICROBLAZE_IRQFLAGS_H
#include <linux/irqflags.h>
# if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
# define local_irq_save(flags) \
do { \
asm volatile ("# local_irq_save \n\t" \
"msrclr %0, %1 \n\t" \
"nop \n\t" \
: "=r"(flags) \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# define local_irq_disable() \
do { \
asm volatile ("# local_irq_disable \n\t" \
"msrclr r0, %0 \n\t" \
"nop \n\t" \
: \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# define local_irq_enable() \
do { \
asm volatile ("# local_irq_enable \n\t" \
"msrset r0, %0 \n\t" \
"nop \n\t" \
: \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */
# define local_irq_save(flags) \
do { \
register unsigned tmp; \
asm volatile ("# local_irq_save \n\t" \
"mfs %0, rmsr \n\t" \
"nop \n\t" \
"andi %1, %0, %2 \n\t" \
"mts rmsr, %1 \n\t" \
"nop \n\t" \
: "=r"(flags), "=r" (tmp) \
: "i"(~MSR_IE) \
: "memory"); \
} while (0)
# define local_irq_disable() \
do { \
register unsigned tmp; \
asm volatile ("# local_irq_disable \n\t" \
"mfs %0, rmsr \n\t" \
"nop \n\t" \
"andi %0, %0, %1 \n\t" \
"mts rmsr, %0 \n\t" \
"nop \n\t" \
: "=r"(tmp) \
: "i"(~MSR_IE) \
: "memory"); \
} while (0)
# define local_irq_enable() \
do { \
register unsigned tmp; \
asm volatile ("# local_irq_enable \n\t" \
"mfs %0, rmsr \n\t" \
"nop \n\t" \
"ori %0, %0, %1 \n\t" \
"mts rmsr, %0 \n\t" \
"nop \n\t" \
: "=r"(tmp) \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
#define local_save_flags(flags) \
do { \
asm volatile ("# local_save_flags \n\t" \
"mfs %0, rmsr \n\t" \
"nop \n\t" \
: "=r"(flags) \
: \
: "memory"); \
} while (0)
#define local_irq_restore(flags) \
do { \
asm volatile ("# local_irq_restore \n\t"\
"mts rmsr, %0 \n\t" \
"nop \n\t" \
: \
: "r"(flags) \
: "memory"); \
} while (0)
static inline int irqs_disabled(void)
{
unsigned long flags;
local_save_flags(flags);
return ((flags & MSR_IE) == 0);
}
#define raw_irqs_disabled irqs_disabled
#define raw_irqs_disabled_flags(flags) ((flags) == 0)
#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
|
