diff options
Diffstat (limited to 'arch/arm64/include/asm/cpuidle.h')
| -rw-r--r-- | arch/arm64/include/asm/cpuidle.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpuidle.h b/arch/arm64/include/asm/cpuidle.h new file mode 100644 index 0000000000..2047713e09 --- /dev/null +++ b/arch/arm64/include/asm/cpuidle.h @@ -0,0 +1,41 @@ +/* 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 |