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stm32: stm32f7: add spl build support

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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>
[trini: Rework Kconfig logic a bit]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Vikas Manocha
2017-05-28 12:55:10 -07:00
committed by Tom Rini
parent ea744fca0e
commit b97476965b
5 changed files with 65 additions and 3 deletions
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22
include/configs/stm32f746-disco.h
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@@ -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 */