57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/armv7m_mpu.h>
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int arch_cpu_init(void)
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{
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int i;
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struct mpu_region_config stm32_region_config[] = {
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/*
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* Make all 4GB cacheable & executable. We are overriding it
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* with next region for any requirement. e.g. below region1,
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* 2 etc.
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* In other words, the area not coming in following
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* regions configuration is the one configured here in region_0
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* (cacheable & executable).
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*/
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{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
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O_I_WB_RD_WR_ALLOC, REGION_4GB },
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/* armv7m code area */
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{ 0x00000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,
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STRONG_ORDER, REGION_512MB },
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/* Device area : Not executable */
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{ 0x40000000, REGION_2, XN_EN, PRIV_RW_USR_RW,
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DEVICE_NON_SHARED, REGION_512MB },
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/*
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* Armv7m fixed configuration: strongly ordered & not
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* executable, not cacheable
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*/
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{ 0xE0000000, REGION_3, XN_EN, PRIV_RW_USR_RW,
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STRONG_ORDER, REGION_512MB },
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#if !defined(CONFIG_STM32H7)
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/* Device area : Not executable */
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{ 0xA0000000, REGION_4, XN_EN, PRIV_RW_USR_RW,
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DEVICE_NON_SHARED, REGION_512MB },
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#endif
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};
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disable_mpu();
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for (i = 0; i < ARRAY_SIZE(stm32_region_config); i++)
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mpu_config(&stm32_region_config[i]);
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enable_mpu();
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return 0;
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}
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