1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Low-level idle sequences
 4 */
 5
 6#include <linux/cpu.h>
 7#include <linux/irqflags.h>
 8
 9#include <asm/barrier.h>
10#include <asm/cpuidle.h>
11#include <asm/cpufeature.h>
12#include <asm/sysreg.h>
13
14/*
15 *	cpu_do_idle()
16 *
17 *	Idle the processor (wait for interrupt).
18 *
19 *	If the CPU supports priority masking we must do additional work to
20 *	ensure that interrupts are not masked at the PMR (because the core will
21 *	not wake up if we block the wake up signal in the interrupt controller).
22 */
23void __cpuidle cpu_do_idle(void)
24{
25	struct arm_cpuidle_irq_context context;
26
27	arm_cpuidle_save_irq_context(&context);
28
29	dsb(sy);
30	wfi();
31
32	arm_cpuidle_restore_irq_context(&context);
33}
34
35/*
36 * This is our default idle handler.
37 */
38void __cpuidle arch_cpu_idle(void)
39{
40	/*
41	 * This should do all the clock switching and wait for interrupt
42	 * tricks
43	 */
44	cpu_do_idle();
45}