28 lines
633 B
C
28 lines
633 B
C
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/*
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* Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/toolchain.h>
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#include <zephyr/irq.h>
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#include <zephyr/arch/cpu.h>
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/**
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* @brief Power save idle routine
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*
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* This function will be called by the kernel idle loop or possibly within
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* an implementation of _pm_save_idle in the kernel when the
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* '_pm_save_flag' variable is non-zero.
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*/
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void arch_cpu_idle(void)
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{
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/* curiously it arrives here with the interrupts masked
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* so umask it before wait for an event
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*/
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arch_irq_unlock(MSTATUS_IEN);
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/* Wait for interrupt */
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__asm__ volatile("wfi");
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}
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