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author | Patrice Chotard <patrice.chotard@st.com> | 2017-11-16 08:59:21 +0100 |
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committer | Tom Rini <trini@konsulko.com> | 2017-11-29 22:30:50 -0500 |
commit | c729fb258a49943a1a63b3b466f5db02fab6c336 (patch) | |
tree | cdf1bb2557596a93810be4f381801c04799688f7 /arch/arm/mach-stm32/soc.c | |
parent | 014a953c4ab644f600e4507354f2ef603bb50f46 (diff) | |
download | u-boot-c729fb258a49943a1a63b3b466f5db02fab6c336.zip u-boot-c729fb258a49943a1a63b3b466f5db02fab6c336.tar.gz u-boot-c729fb258a49943a1a63b3b466f5db02fab6c336.tar.bz2 |
mach-stm32: Factorize MPU's region config for STM32 SoCs
MPU's region setup can be factorized between STM32F4/F7/H7 SoCs family
and used a common MPU's region config.
Only one exception for STM32H7 which doesn't have device area
located at 0xA000 0000.
For STM32F4, configure_clocks() need to be moved from arch_cpu_init()
to board_early_init_f().
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>
Diffstat (limited to 'arch/arm/mach-stm32/soc.c')
-rw-r--r-- | arch/arm/mach-stm32/soc.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32/soc.c b/arch/arm/mach-stm32/soc.c new file mode 100644 index 0000000..df20d54 --- /dev/null +++ b/arch/arm/mach-stm32/soc.c @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2017, STMicroelectronics - All Rights Reserved + * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/armv7m_mpu.h> + +int arch_cpu_init(void) +{ + int i; + + struct mpu_region_config stm32_region_config[] = { + /* + * Make all 4GB cacheable & executable. We are overriding it + * with next region for any requirement. e.g. below region1, + * 2 etc. + * In other words, the area not coming in following + * regions configuration is the one configured here in region_0 + * (cacheable & executable). + */ + { 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW, + O_I_WB_RD_WR_ALLOC, REGION_4GB }, + + /* armv7m code area */ + { 0x00000000, REGION_1, XN_DIS, PRIV_RW_USR_RW, + STRONG_ORDER, REGION_512MB }, + + /* Device area : Not executable */ + { 0x40000000, REGION_2, XN_EN, PRIV_RW_USR_RW, + DEVICE_NON_SHARED, REGION_512MB }, + + /* + * Armv7m fixed configuration: strongly ordered & not + * executable, not cacheable + */ + { 0xE0000000, REGION_3, XN_EN, PRIV_RW_USR_RW, + STRONG_ORDER, REGION_512MB }, + +#if !defined(CONFIG_STM32H7) + /* Device area : Not executable */ + { 0xA0000000, REGION_4, XN_EN, PRIV_RW_USR_RW, + DEVICE_NON_SHARED, REGION_512MB }, +#endif + }; + + disable_mpu(); + for (i = 0; i < ARRAY_SIZE(stm32_region_config); i++) + mpu_config(&stm32_region_config[i]); + enable_mpu(); + + return 0; +} |