LXR linux/include/asm-generic/irqflags.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_GENERIC_IRQFLAGS_H
   3#define __ASM_GENERIC_IRQFLAGS_H
   4
   5/*
   6 * All architectures should implement at least the first two functions,
   7 * usually inline assembly will be the best way.
   8 */
   9#ifndef ARCH_IRQ_DISABLED
  10#define ARCH_IRQ_DISABLED 0
  11#define ARCH_IRQ_ENABLED 1
  12#endif
  13
  14/* read interrupt enabled status */
  15#ifndef arch_local_save_flags
  16unsigned long arch_local_save_flags(void);
  17#endif
  18
  19/* set interrupt enabled status */
  20#ifndef arch_local_irq_restore
  21void arch_local_irq_restore(unsigned long flags);
  22#endif
  23
  24/* get status and disable interrupts */
  25#ifndef arch_local_irq_save
  26static inline unsigned long arch_local_irq_save(void)
  27{
  28        unsigned long flags;
  29        flags = arch_local_save_flags();
  30        arch_local_irq_restore(ARCH_IRQ_DISABLED);
  31        return flags;
  32}
  33#endif
  34
  35/* test flags */
  36#ifndef arch_irqs_disabled_flags
  37static inline int arch_irqs_disabled_flags(unsigned long flags)
  38{
  39        return flags == ARCH_IRQ_DISABLED;
  40}
  41#endif
  42
  43/* unconditionally enable interrupts */
  44#ifndef arch_local_irq_enable
  45static inline void arch_local_irq_enable(void)
  46{
  47        arch_local_irq_restore(ARCH_IRQ_ENABLED);
  48}
  49#endif
  50
  51/* unconditionally disable interrupts */
  52#ifndef arch_local_irq_disable
  53static inline void arch_local_irq_disable(void)
  54{
  55        arch_local_irq_restore(ARCH_IRQ_DISABLED);
  56}
  57#endif
  58
  59/* test hardware interrupt enable bit */
  60#ifndef arch_irqs_disabled
  61static inline int arch_irqs_disabled(void)
  62{
  63        return arch_irqs_disabled_flags(arch_local_save_flags());
  64}
  65#endif
  66
  67#endif /* __ASM_GENERIC_IRQFLAGS_H */
  68