1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
4 * Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics.
5 */
6
7 #include <common.h>
8 #include <init.h>
9 #include <asm/io.h>
10 #include <asm/armv7_mpu.h>
11
arch_cpu_init(void)12 int arch_cpu_init(void)
13 {
14 int i;
15
16 struct mpu_region_config stm32_region_config[] = {
17 /*
18 * Make SDRAM area cacheable & executable.
19 */
20 #if defined(CONFIG_STM32F4)
21 { 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
22 O_I_WB_RD_WR_ALLOC, REGION_512MB },
23 #endif
24
25 { 0x90000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,
26 SHARED_WRITE_BUFFERED, REGION_256MB },
27
28 #if defined(CONFIG_STM32F7) || defined(CONFIG_STM32H7)
29 { 0xC0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
30 O_I_WB_RD_WR_ALLOC, REGION_512MB },
31 #endif
32 };
33
34 disable_mpu();
35 for (i = 0; i < ARRAY_SIZE(stm32_region_config); i++)
36 mpu_config(&stm32_region_config[i]);
37 enable_mpu();
38
39 return 0;
40 }
41