This commit supports booting from stm32 internal nor flash. spl U-Boot initializes the sdram memory, copies next image (e.g. standard U-Boot) to sdram & then jumps to entry point.
Here are the flash memory addresses for U-Boot-spl & standard U-Boot: - spl U-Boot : 0x0800_0000 - standard U-Boot : 0x0800_8000
To compile u-boot without spl: Remove SUPPORT_SPL configuration (arch/arm/mach-stm32/Kconfig)
Signed-off-by: Vikas Manocha vikas.manocha@st.com --- arch/arm/mach-stm32/Kconfig | 1 + arch/arm/mach-stm32/stm32f7/Kconfig | 22 ++++++++++++++++++++++ board/st/stm32f746-disco/stm32f746-disco.c | 27 ++++++++++++++++++++++++++- configs/stm32f746-disco_defconfig | 1 - include/configs/stm32f746-disco.h | 22 +++++++++++++++++++++- 5 files changed, 70 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig index ec6b3ff..879383f 100644 --- a/arch/arm/mach-stm32/Kconfig +++ b/arch/arm/mach-stm32/Kconfig @@ -8,6 +8,7 @@ config STM32F1
config STM32F7 bool "stm32f7 family" + select SUPPORT_SPL
source "arch/arm/mach-stm32/stm32f4/Kconfig" source "arch/arm/mach-stm32/stm32f1/Kconfig" diff --git a/arch/arm/mach-stm32/stm32f7/Kconfig b/arch/arm/mach-stm32/stm32f7/Kconfig index 287e5ad..c13fafa 100644 --- a/arch/arm/mach-stm32/stm32f7/Kconfig +++ b/arch/arm/mach-stm32/stm32f7/Kconfig @@ -3,6 +3,28 @@ if STM32F7 config TARGET_STM32F746_DISCO bool "STM32F746 Discovery board"
+config SUPPORT_SPL + select SPL + select SPL_FRAMEWORK + select SPL_SERIAL_SUPPORT + select SPL_CLK + select SPL_OF_CONTROL + select SPL_OF_LIBFDT + select SPL_GPIO_SUPPORT + select SPL_LIBCOMMON_SUPPORT + select SPL_LIBGENERIC_SUPPORT + select SPL_DRIVERS_MISC_SUPPORT + select SPL_SYS_MALLOC_SIMPLE + select SPL_MTD_SUPPORT + select SPL_DM + select SPL_PINCTRL + select SPL_RAM + select SPL_DM_SEQ_ALIAS + select SPL_OF_TRANSLATE + +config SPL_PINCTRL_FULL + default n if TARGET_STM32F746_DISCO + source "board/st/stm32f746-disco/Kconfig"
endif diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c index dc3a9dc..4f2b677 100644 --- a/board/st/stm32f746-disco/stm32f746-disco.c +++ b/board/st/stm32f746-disco/stm32f746-disco.c @@ -8,6 +8,7 @@ #include <common.h> #include <dm.h> #include <ram.h> +#include <spl.h> #include <asm/io.h> #include <asm/armv7m.h> #include <asm/arch/stm32.h> @@ -36,16 +37,18 @@ int get_memory_base_size(fdt_addr_t *mr_base, fdt_addr_t *mr_size) } int dram_init(void) { - struct udevice *dev; int rv; fdt_addr_t mr_base, mr_size;
+#ifndef CONFIG_SUPPORT_SPL + struct udevice *dev; rv = uclass_get_device(UCLASS_RAM, 0, &dev); if (rv) { debug("DRAM init failed: %d\n", rv); return rv; }
+#endif rv = get_memory_base_size(&mr_base, &mr_size); if (rv) return rv; @@ -87,6 +90,28 @@ int board_early_init_f(void) } #endif
+#ifdef CONFIG_SPL_BUILD +int spl_dram_init(void) +{ + struct udevice *dev; + int rv; + rv = uclass_get_device(UCLASS_RAM, 0, &dev); + if (rv) + debug("DRAM init failed: %d\n", rv); + return rv; +} +void spl_board_init(void) +{ + spl_dram_init(); + preloader_console_init(); + arch_cpu_init(); /* to configure mpu for sdram rw permissions */ +} +u32 spl_boot_device(void) +{ + return BOOT_DEVICE_NOR; +} + +#endif u32 get_board_rev(void) { return 0; diff --git a/configs/stm32f746-disco_defconfig b/configs/stm32f746-disco_defconfig index a334d50..766b111 100644 --- a/configs/stm32f746-disco_defconfig +++ b/configs/stm32f746-disco_defconfig @@ -39,7 +39,6 @@ CONFIG_ETH_DESIGNWARE=y CONFIG_PINCTRL=y # CONFIG_PINCTRL_FULL is not set CONFIG_PINCTRL_STM32=y -# CONFIG_SPL_SERIAL_PRESENT is not set CONFIG_DM_SPI=y CONFIG_STM32_QSPI=y CONFIG_OF_LIBFDT_OVERLAY=y diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h index 1ee5815..055fdf8 100644 --- a/include/configs/stm32f746-disco.h +++ b/include/configs/stm32f746-disco.h @@ -10,7 +10,12 @@
#define CONFIG_SYS_FLASH_BASE 0x08000000 #define CONFIG_SYS_INIT_SP_ADDR 0x20050000 -#define CONFIG_SYS_TEXT_BASE 0x08000000 + +#ifdef CONFIG_SUPPORT_SPL +#define CONFIG_SYS_TEXT_BASE 0xC0000000 +#else +#define CONFIG_SYS_TEXT_BASE CONFIG_SYS_FLASH_BASE +#endif
/* * Configuration of the external SDRAM memory @@ -69,4 +74,19 @@ #define CONFIG_CMD_CACHE #define CONFIG_BOARD_LATE_INIT #define CONFIG_DISPLAY_BOARDINFO + +/* For SPL */ +#ifdef CONFIG_SUPPORT_SPL +#define CONFIG_SPL_STACK CONFIG_SYS_INIT_SP_ADDR +#define CONFIG_SPL_FRAMEWORK +#define CONFIG_SPL_BOARD_INIT +#define CONFIG_SPL_TEXT_BASE CONFIG_SYS_FLASH_BASE +#define CONFIG_SYS_MONITOR_LEN (512 * 1024) +#define CONFIG_SYS_SPL_LEN 0x00008000 +#define CONFIG_SYS_UBOOT_START 0XC00003FD +#define CONFIG_SYS_UBOOT_BASE (CONFIG_SYS_FLASH_BASE + \ + CONFIG_SYS_SPL_LEN) +#endif +/* For SPL ends */ + #endif /* __CONFIG_H */