Quelle  cpuidle.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CPUIDLE_H
#define __ASM_CPUIDLE_H

#include <asm/proc-fns.h>

#ifdef CONFIG_ARM64_PSEUDO_NMI
#include <asm/arch_gicv3.h>

struct arm_cpuidle_irq_context {
 unsigned long pmr;
 unsigned long daif_bits;
};

#define arm_cpuidle_save_irq_context(__c)    \
 do {        \
  struct arm_cpuidle_irq_context *c = __c;  \
  if (system_uses_irq_prio_masking()) {   \
   c->daif_bits = read_sysreg(daif);  \
   write_sysreg(c->daif_bits | PSR_I_BIT | PSR_F_BIT, \
         daif);    \
   c->pmr = gic_read_pmr();   \
   gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); \
  }       \
 } while (0)

#define arm_cpuidle_restore_irq_context(__c)    \
 do {        \
  struct arm_cpuidle_irq_context *c = __c;  \
  if (system_uses_irq_prio_masking()) {   \
   gic_write_pmr(c->pmr);    \
   write_sysreg(c->daif_bits, daif);  \
  }       \
 } while (0)
#else
struct arm_cpuidle_irq_context { };

#define arm_cpuidle_save_irq_context(c)  (void)c
#define arm_cpuidle_restore_irq_context(c) (void)c
#endif
#endif