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56 lines
1.3 KiB
56 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_CPUIDLE_H |
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#define __ASM_CPUIDLE_H |
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#include <asm/proc-fns.h> |
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#ifdef CONFIG_CPU_IDLE |
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extern int arm_cpuidle_init(unsigned int cpu); |
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extern int arm_cpuidle_suspend(int index); |
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#else |
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static inline int arm_cpuidle_init(unsigned int cpu) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int arm_cpuidle_suspend(int index) |
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{ |
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return -EOPNOTSUPP; |
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} |
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#endif |
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#ifdef CONFIG_ARM64_PSEUDO_NMI |
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#include <asm/arch_gicv3.h> |
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struct arm_cpuidle_irq_context { |
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unsigned long pmr; |
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unsigned long daif_bits; |
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}; |
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#define arm_cpuidle_save_irq_context(__c) \ |
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do { \ |
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struct arm_cpuidle_irq_context *c = __c; \ |
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if (system_uses_irq_prio_masking()) { \ |
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c->daif_bits = read_sysreg(daif); \ |
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write_sysreg(c->daif_bits | PSR_I_BIT | PSR_F_BIT, \ |
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daif); \ |
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c->pmr = gic_read_pmr(); \ |
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gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); \ |
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} \ |
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} while (0) |
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#define arm_cpuidle_restore_irq_context(__c) \ |
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do { \ |
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struct arm_cpuidle_irq_context *c = __c; \ |
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if (system_uses_irq_prio_masking()) { \ |
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gic_write_pmr(c->pmr); \ |
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write_sysreg(c->daif_bits, daif); \ |
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} \ |
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} while (0) |
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#else |
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struct arm_cpuidle_irq_context { }; |
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#define arm_cpuidle_save_irq_context(c) (void)c |
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#define arm_cpuidle_restore_irq_context(c) (void)c |
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#endif |
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#endif
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