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Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_ARM_IRQFLAGS_H
2#define __ASM_ARM_IRQFLAGS_H
3
4#ifdef __KERNEL__
5
6#include <asm/ptrace.h>
7
8/*
9 * CPU interrupt mask handling.
10 */
11#if __LINUX_ARM_ARCH__ >= 6
12
13static inline unsigned long arch_local_irq_save(void)
14{
15 unsigned long flags;
16
17 asm volatile(
18 " mrs %0, cpsr @ arch_local_irq_save\n"
19 " cpsid i"
20 : "=r" (flags) : : "memory", "cc");
21 return flags;
22}
23
24static inline void arch_local_irq_enable(void)
25{
26 asm volatile(
27 " cpsie i @ arch_local_irq_enable"
28 :
29 :
30 : "memory", "cc");
31}
32
33static inline void arch_local_irq_disable(void)
34{
35 asm volatile(
36 " cpsid i @ arch_local_irq_disable"
37 :
38 :
39 : "memory", "cc");
40}
41
42#define local_fiq_enable() __asm__("cpsie f @ __stf" : : : "memory", "cc")
43#define local_fiq_disable() __asm__("cpsid f @ __clf" : : : "memory", "cc")
44#else
45
46/*
47 * Save the current interrupt enable state & disable IRQs
48 */
49static inline unsigned long arch_local_irq_save(void)
50{
51 unsigned long flags, temp;
52
53 asm volatile(
54 " mrs %0, cpsr @ arch_local_irq_save\n"
55 " orr %1, %0, #128\n"
56 " msr cpsr_c, %1"
57 : "=r" (flags), "=r" (temp)
58 :
59 : "memory", "cc");
60 return flags;
61}
62
63/*
64 * Enable IRQs
65 */
66static inline void arch_local_irq_enable(void)
67{
68 unsigned long temp;
69 asm volatile(
70 " mrs %0, cpsr @ arch_local_irq_enable\n"
71 " bic %0, %0, #128\n"
72 " msr cpsr_c, %0"
73 : "=r" (temp)
74 :
75 : "memory", "cc");
76}
77
78/*
79 * Disable IRQs
80 */
81static inline void arch_local_irq_disable(void)
82{
83 unsigned long temp;
84 asm volatile(
85 " mrs %0, cpsr @ arch_local_irq_disable\n"
86 " orr %0, %0, #128\n"
87 " msr cpsr_c, %0"
88 : "=r" (temp)
89 :
90 : "memory", "cc");
91}
92
93/*
94 * Enable FIQs
95 */
96#define local_fiq_enable() \
97 ({ \
98 unsigned long temp; \
99 __asm__ __volatile__( \
100 "mrs %0, cpsr @ stf\n" \
101" bic %0, %0, #64\n" \
102" msr cpsr_c, %0" \
103 : "=r" (temp) \
104 : \
105 : "memory", "cc"); \
106 })
107
108/*
109 * Disable FIQs
110 */
111#define local_fiq_disable() \
112 ({ \
113 unsigned long temp; \
114 __asm__ __volatile__( \
115 "mrs %0, cpsr @ clf\n" \
116" orr %0, %0, #64\n" \
117" msr cpsr_c, %0" \
118 : "=r" (temp) \
119 : \
120 : "memory", "cc"); \
121 })
122
123#endif
124
125/*
126 * Save the current interrupt enable state.
127 */
128static inline unsigned long arch_local_save_flags(void)
129{
130 unsigned long flags;
131 asm volatile(
132 " mrs %0, cpsr @ local_save_flags"
133 : "=r" (flags) : : "memory", "cc");
134 return flags;
135}
136
137/*
138 * restore saved IRQ & FIQ state
139 */
140static inline void arch_local_irq_restore(unsigned long flags)
141{
142 asm volatile(
143 " msr cpsr_c, %0 @ local_irq_restore"
144 :
145 : "r" (flags)
146 : "memory", "cc");
147}
148
149static inline int arch_irqs_disabled_flags(unsigned long flags)
150{
151 return flags & PSR_I_BIT;
152}
153
154#endif
155#endif