include/asm/cpuidle.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __ASM_CPUIDLE_H
0003 #define __ASM_CPUIDLE_H
0004
0005 #include <asm/proc-fns.h>
0006
0007 #ifdef CONFIG_ARM64_PSEUDO_NMI
0008 #include <asm/arch_gicv3.h>
0009
0010 struct arm_cpuidle_irq_context {
0011     unsigned long pmr;
0012     unsigned long daif_bits;
0013 };
0014
0015 #define arm_cpuidle_save_irq_context(__c)               \
0016     do {                                \
0017         struct arm_cpuidle_irq_context *c = __c;        \
0018         if (system_uses_irq_prio_masking()) {           \
0019             c->daif_bits = read_sysreg(daif);       \
0020             write_sysreg(c->daif_bits | PSR_I_BIT | PSR_F_BIT, \
0021                      daif);             \
0022             c->pmr = gic_read_pmr();            \
0023             gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); \
0024         }                           \
0025     } while (0)
0026
0027 #define arm_cpuidle_restore_irq_context(__c)                \
0028     do {                                \
0029         struct arm_cpuidle_irq_context *c = __c;        \
0030         if (system_uses_irq_prio_masking()) {           \
0031             gic_write_pmr(c->pmr);              \
0032             write_sysreg(c->daif_bits, daif);       \
0033         }                           \
0034     } while (0)
0035 #else
0036 struct arm_cpuidle_irq_context { };
0037
0038 #define arm_cpuidle_save_irq_context(c)     (void)c
0039 #define arm_cpuidle_restore_irq_context(c)  (void)c
0040 #endif
0041 #endif