arch/arm/mach-stm32/soc.c

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