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These are all kernel internal interfaces that get copied around a lot. In most cases, architectures can provide their own optimized versions, but these generic versions can work as well. I have tried to use the most common contents of each header to allow existing architectures to migrate easily. Thanks to Remis for suggesting a number of cleanups. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
#ifndef __ASM_GENERIC_IRQFLAGS_H
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#define __ASM_GENERIC_IRQFLAGS_H
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/*
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* All architectures should implement at least the first two functions,
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* usually inline assembly will be the best way.
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*/
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#ifndef RAW_IRQ_DISABLED
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#define RAW_IRQ_DISABLED 0
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#define RAW_IRQ_ENABLED 1
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#endif
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/* read interrupt enabled status */
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#ifndef __raw_local_save_flags
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unsigned long __raw_local_save_flags(void);
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#endif
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/* set interrupt enabled status */
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#ifndef raw_local_irq_restore
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void raw_local_irq_restore(unsigned long flags);
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#endif
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/* get status and disable interrupts */
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#ifndef __raw_local_irq_save
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static inline unsigned long __raw_local_irq_save(void)
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{
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unsigned long flags;
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flags = __raw_local_save_flags();
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raw_local_irq_restore(RAW_IRQ_DISABLED);
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return flags;
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}
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#endif
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/* test flags */
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#ifndef raw_irqs_disabled_flags
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static inline int raw_irqs_disabled_flags(unsigned long flags)
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{
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return flags == RAW_IRQ_DISABLED;
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}
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#endif
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/* unconditionally enable interrupts */
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#ifndef raw_local_irq_enable
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static inline void raw_local_irq_enable(void)
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{
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raw_local_irq_restore(RAW_IRQ_ENABLED);
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}
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#endif
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/* unconditionally disable interrupts */
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#ifndef raw_local_irq_disable
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static inline void raw_local_irq_disable(void)
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{
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raw_local_irq_restore(RAW_IRQ_DISABLED);
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}
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#endif
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/* test hardware interrupt enable bit */
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#ifndef raw_irqs_disabled
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static inline int raw_irqs_disabled(void)
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{
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return raw_irqs_disabled_flags(__raw_local_save_flags());
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}
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#endif
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#define raw_local_save_flags(flags) \
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do { (flags) = __raw_local_save_flags(); } while (0)
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#define raw_local_irq_save(flags) \
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do { (flags) = __raw_local_irq_save(); } while (0)
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#endif /* __ASM_GENERIC_IRQFLAGS_H */
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