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irqflags_64.h

/*
 * include/asm/irqflags.h
 *
 * IRQ flags handling
 *
 * This file gets included from lowlevel asm headers too, to provide
 * wrapped versions of the local_irq_*() APIs, based on the
 * raw_local_irq_*() functions from the lowlevel headers.
 */
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H

#ifndef __ASSEMBLY__

static inline unsigned long __raw_local_save_flags(void)
{
      unsigned long flags;

      __asm__ __volatile__(
            "rdpr %%pil, %0"
            : "=r" (flags)
      );

      return flags;
}

#define raw_local_save_flags(flags) \
            do { (flags) = __raw_local_save_flags(); } while (0)

static inline void raw_local_irq_restore(unsigned long flags)
{
      __asm__ __volatile__(
            "wrpr %0, %%pil"
            : /* no output */
            : "r" (flags)
            : "memory"
      );
}

static inline void raw_local_irq_disable(void)
{
      __asm__ __volatile__(
            "wrpr 15, %%pil"
            : /* no outputs */
            : /* no inputs */
            : "memory"
      );
}

static inline void raw_local_irq_enable(void)
{
      __asm__ __volatile__(
            "wrpr 0, %%pil"
            : /* no outputs */
            : /* no inputs */
            : "memory"
      );
}

static inline int raw_irqs_disabled_flags(unsigned long flags)
{
      return (flags > 0);
}

static inline int raw_irqs_disabled(void)
{
      unsigned long flags = __raw_local_save_flags();

      return raw_irqs_disabled_flags(flags);
}

/*
 * For spinlocks, etc:
 */
static inline unsigned long __raw_local_irq_save(void)
{
      unsigned long flags = __raw_local_save_flags();

      raw_local_irq_disable();

      return flags;
}

#define raw_local_irq_save(flags) \
            do { (flags) = __raw_local_irq_save(); } while (0)

#endif /* (__ASSEMBLY__) */

#endif /* !(_ASM_IRQFLAGS_H) */

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