arch/arm64/include/asm/cpuidle.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_CPUIDLE_H
   3 #define __ASM_CPUIDLE_H
   4
   5 #include <asm/proc-fns.h>
   6
   7 #ifdef CONFIG_ARM64_PSEUDO_NMI
   8 #include <asm/arch_gicv3.h>
   9
  10 struct arm_cpuidle_irq_context {
  11         unsigned long pmr;
  12         unsigned long daif_bits;
  13 };
  14
  15 #define arm_cpuidle_save_irq_context(__c)                               \
  16         do {                                                            \
  17                 struct arm_cpuidle_irq_context *c = __c;                \
  18                 if (system_uses_irq_prio_masking()) {                   \
  19                         c->daif_bits = read_sysreg(daif);               \
  20                         write_sysreg(c->daif_bits | PSR_I_BIT | PSR_F_BIT, \
  21                                      daif);                             \
  22                         c->pmr = gic_read_pmr();                        \
  23                         gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); \
  24                 }                                                       \
  25         } while (0)
  26
  27 #define arm_cpuidle_restore_irq_context(__c)                            \
  28         do {                                                            \
  29                 struct arm_cpuidle_irq_context *c = __c;                \
  30                 if (system_uses_irq_prio_masking()) {                   \
  31                         gic_write_pmr(c->pmr);                          \
  32                         write_sysreg(c->daif_bits, daif);               \
  33                 }                                                       \
  34         } while (0)
  35 #else
  36 struct arm_cpuidle_irq_context { };
  37
  38 #define arm_cpuidle_save_irq_context(c)         (void)c
  39 #define arm_cpuidle_restore_irq_context(c)      (void)c
  40 #endif
  41 #endif