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/* Copyright 2020 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* This file is used for platform/ec implementations of irq_lock and irq_unlock
* which are defined by Zephyr.
*/
#include "task.h"
#include "util.h"
static uint32_t lock_count;
uint32_t irq_lock(void)
{
interrupt_disable();
return lock_count++;
}
void irq_unlock(uint32_t key)
{
lock_count = key;
/*
* Since we're allowing nesting locks, we only actually want to release
* the lock if the lock count reached 0.
*/
if (lock_count == 0)
interrupt_enable();
}
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