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
  15 unsigned long arch_local_save_flags(void);
  16 #endif
  17
  18 /* set interrupt enabled status */
  19 #ifndef arch_local_irq_restore
  20 void arch_local_irq_restore(unsigned long flags);
  21 #endif
  22
  23 /* get status and disable interrupts */
  24 #ifndef arch_local_irq_save
  25 static 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
  36 static 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
  44 static 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
  52 static 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
  60 static 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 */