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asm-generic: add generic versions of common headers

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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>
This commit is contained in:
Arnd Bergmann
2009-05-13 22:56:33 +00:00
committed by Arnd Bergmann
parent 9858c60cc2
commit aafe4dbed0
18 changed files with 558 additions and 0 deletions
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72
include/asm-generic/irqflags.h Normal file
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#ifndef __ASM_GENERIC_IRQFLAGS_H
#define __ASM_GENERIC_IRQFLAGS_H
/*
* All architectures should implement at least the first two functions,
* usually inline assembly will be the best way.
*/
#ifndef RAW_IRQ_DISABLED
#define RAW_IRQ_DISABLED 0
#define RAW_IRQ_ENABLED 1
#endif
/* read interrupt enabled status */
#ifndef __raw_local_save_flags
unsigned long __raw_local_save_flags(void);
#endif
/* set interrupt enabled status */
#ifndef raw_local_irq_restore
void raw_local_irq_restore(unsigned long flags);
#endif
/* get status and disable interrupts */
#ifndef __raw_local_irq_save
static inline unsigned long __raw_local_irq_save(void)
{
unsigned long flags;
flags = __raw_local_save_flags();
raw_local_irq_restore(RAW_IRQ_DISABLED);
return flags;
}
#endif
/* test flags */
#ifndef raw_irqs_disabled_flags
static inline int raw_irqs_disabled_flags(unsigned long flags)
{
return flags == RAW_IRQ_DISABLED;
}
#endif
/* unconditionally enable interrupts */
#ifndef raw_local_irq_enable
static inline void raw_local_irq_enable(void)
{
raw_local_irq_restore(RAW_IRQ_ENABLED);
}
#endif
/* unconditionally disable interrupts */
#ifndef raw_local_irq_disable
static inline void raw_local_irq_disable(void)
{
raw_local_irq_restore(RAW_IRQ_DISABLED);
}
#endif
/* test hardware interrupt enable bit */
#ifndef raw_irqs_disabled
static inline int raw_irqs_disabled(void)
{
return raw_irqs_disabled_flags(__raw_local_save_flags());
}
#endif
#define raw_local_save_flags(flags) \
do { (flags) = __raw_local_save_flags(); } while (0)
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)
#endif /* __ASM_GENERIC_IRQFLAGS_H */