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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CPUIDLE_H
#define __ASM_CPUIDLE_H
#include <asm/proc-fns.h>
#ifdef CONFIG_CPU_IDLE
extern int arm_cpuidle_init(unsigned int cpu);
extern int arm_cpuidle_suspend(int index);
#else
static inline int arm_cpuidle_init(unsigned int cpu)
{
return -EOPNOTSUPP;
}
static inline int arm_cpuidle_suspend(int index)
{
return -EOPNOTSUPP;
}
#endif
#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