47 lines
918 B
C
47 lines
918 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Low-level idle sequences
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*/
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#include <linux/cpu.h>
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#include <linux/irqflags.h>
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#include <asm/barrier.h>
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#include <asm/cpuidle.h>
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#include <asm/cpufeature.h>
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#include <asm/sysreg.h>
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/*
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* cpu_do_idle()
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*
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* Idle the processor (wait for interrupt).
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*
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* If the CPU supports priority masking we must do additional work to
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* ensure that interrupts are not masked at the PMR (because the core will
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* not wake up if we block the wake up signal in the interrupt controller).
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*/
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void noinstr cpu_do_idle(void)
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{
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struct arm_cpuidle_irq_context context;
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arm_cpuidle_save_irq_context(&context);
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dsb(sy);
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wfi();
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arm_cpuidle_restore_irq_context(&context);
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}
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/*
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* This is our default idle handler.
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*/
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void noinstr arch_cpu_idle(void)
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{
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/*
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* This should do all the clock switching and wait for interrupt
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* tricks
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*/
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cpu_do_idle();
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raw_local_irq_enable();
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}
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