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f2ef204312
The Memory Protection Unit(MPU) allows to partition memory into regions and set individual protection attributes for each region. In absence of MPU a default map[1] will take effect. Add support for configuring MPU on Cortex-R, by reusing the existing support for Cortex-M processor. [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0460d/I1002400.html Tested-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
42 lines
912 B
C
42 lines
912 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <asm/io.h>
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#include <asm/armv7_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 SDRAM area cacheable & executable.
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*/
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#if defined(CONFIG_STM32F4)
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{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
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O_I_WB_RD_WR_ALLOC, REGION_16MB },
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#endif
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#if defined(CONFIG_STM32F7)
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{ 0xC0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
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O_I_WB_RD_WR_ALLOC, REGION_16MB },
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#endif
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#if defined(CONFIG_STM32H7)
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{ 0xD0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
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O_I_WB_RD_WR_ALLOC, REGION_32MB },
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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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