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/armv7m_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_16MB },
  22 #endif
  23
  24 #if defined(CONFIG_STM32F7)
  25                 { 0xC0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
  26                 O_I_WB_RD_WR_ALLOC, REGION_16MB },
  27 #endif
  28
  29 #if defined(CONFIG_STM32H7)
  30                 { 0xD0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
  31                 O_I_WB_RD_WR_ALLOC, REGION_32MB },
  32 #endif
  33         };
  34
  35         disable_mpu();
  36         for (i = 0; i < ARRAY_SIZE(stm32_region_config); i++)
  37                 mpu_config(&stm32_region_config[i]);
  38         enable_mpu();
  39
  40         return 0;
  41 }