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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <zephyr/arch/arm/aarch32/cortex_m/cmsis.h>
#include <zephyr/arch/cpu.h>
#include <zephyr/init.h>
#include "config.h"
#include "mpu.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(shim_mpu, LOG_LEVEL_ERR);
void mpu_enable(void)
{
for (int index = 0; index < mpu_config.num_regions; index++) {
MPU->RNR = index;
MPU->RASR |= MPU_RASR_ENABLE_Msk;
LOG_DBG("[%d] %08x %08x", index, MPU->RBAR, MPU->RASR);
}
}
static int mpu_disable_fixed_regions(const struct device *dev)
{
/* MPU is configured and enabled by the Zephyr init code, disable the
* fixed sections by default.
*/
for (int index = 0; index < mpu_config.num_regions; index++) {
MPU->RNR = index;
MPU->RASR &= ~MPU_RASR_ENABLE_Msk;
LOG_DBG("[%d] %08x %08x", index, MPU->RBAR, MPU->RASR);
}
return 0;
}
SYS_INIT(mpu_disable_fixed_regions, PRE_KERNEL_1, 50);
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