57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
|
/* 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
|