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author | Arnd Bergmann <arnd@arndb.de> | 2009-05-13 22:56:33 +0000 |
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committer | Arnd Bergmann <arnd@klappe2.(none)> | 2009-06-11 21:02:37 +0200 |
commit | aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d (patch) | |
tree | 5cc3e500ebb234ad82928de0ed680373c616dc44 /include/asm-generic/irqflags.h | |
parent | 9858c60cc2d33b18367b2bc6947e3ea23db26ccb (diff) | |
download | linux-3.10-aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d.tar.gz linux-3.10-aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d.tar.bz2 linux-3.10-aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d.zip |
asm-generic: add generic versions of common headers
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>
Diffstat (limited to 'include/asm-generic/irqflags.h')
-rw-r--r-- | include/asm-generic/irqflags.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/asm-generic/irqflags.h b/include/asm-generic/irqflags.h new file mode 100644 index 00000000000..9aebf618275 --- /dev/null +++ b/include/asm-generic/irqflags.h @@ -0,0 +1,72 @@ +#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 */ |