Root/include/asm-generic/irqflags.h

1#ifndef __ASM_GENERIC_IRQFLAGS_H
2#define __ASM_GENERIC_IRQFLAGS_H
3
4/*
5 * All architectures should implement at least the first two functions,
6 * usually inline assembly will be the best way.
7 */
8#ifndef ARCH_IRQ_DISABLED
9#define ARCH_IRQ_DISABLED 0
10#define ARCH_IRQ_ENABLED 1
11#endif
12
13/* read interrupt enabled status */
14#ifndef arch_local_save_flags
15unsigned long arch_local_save_flags(void);
16#endif
17
18/* set interrupt enabled status */
19#ifndef arch_local_irq_restore
20void arch_local_irq_restore(unsigned long flags);
21#endif
22
23/* get status and disable interrupts */
24#ifndef arch_local_irq_save
25static inline unsigned long arch_local_irq_save(void)
26{
27    unsigned long flags;
28    flags = arch_local_save_flags();
29    arch_local_irq_restore(ARCH_IRQ_DISABLED);
30    return flags;
31}
32#endif
33
34/* test flags */
35#ifndef arch_irqs_disabled_flags
36static inline int arch_irqs_disabled_flags(unsigned long flags)
37{
38    return flags == ARCH_IRQ_DISABLED;
39}
40#endif
41
42/* unconditionally enable interrupts */
43#ifndef arch_local_irq_enable
44static inline void arch_local_irq_enable(void)
45{
46    arch_local_irq_restore(ARCH_IRQ_ENABLED);
47}
48#endif
49
50/* unconditionally disable interrupts */
51#ifndef arch_local_irq_disable
52static inline void arch_local_irq_disable(void)
53{
54    arch_local_irq_restore(ARCH_IRQ_DISABLED);
55}
56#endif
57
58/* test hardware interrupt enable bit */
59#ifndef arch_irqs_disabled
60static inline int arch_irqs_disabled(void)
61{
62    return arch_irqs_disabled_flags(arch_local_save_flags());
63}
64#endif
65
66#endif /* __ASM_GENERIC_IRQFLAGS_H */
67

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