35 lines
722 B
C
35 lines
722 B
C
/*
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* Copyright (C) 2024 Nordic Semiconductor ASA
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/irq.h>
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#include <zephyr/sys/barrier.h>
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#include <zephyr/tracing/tracing.h>
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/*
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* Due to a HW issue, VPR requires MSTATUS.MIE to be enabled when entering sleep.
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* Otherwise it would not wake up.
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*/
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void arch_cpu_idle(void)
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{
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sys_trace_idle();
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barrier_dsync_fence_full();
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irq_unlock(MSTATUS_IEN);
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__asm__ volatile("wfi");
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}
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void arch_cpu_atomic_idle(unsigned int key)
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{
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sys_trace_idle();
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barrier_dsync_fence_full();
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irq_unlock(MSTATUS_IEN);
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__asm__ volatile("wfi");
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/* Disable interrupts if needed. */
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__asm__ volatile ("csrc mstatus, %0"
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:
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: "r" (~key & MSTATUS_IEN)
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: "memory");
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}
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