From 944c7a317675d8dbf082a2f144fec1139a5cb811 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 25 Aug 2015 13:49:41 +0200 Subject: arm: mvebu: Add option to use UART xmodem protocol via kwboot This patch enables the use of the kwboot tool, to boot mainline U-Boot on the Marvell Armada XP/38x SoC's. This is done by returning to the SoC's BootROM after SPL has initialized the SDRAM. We need to make sure to not reconfigure the internal register space and MBARs. Otherwise the BootROM will not be able to continue after SPL jumps back to it. To use this feature, please don't forget to change the BOOT_FROM line in your board specfic kwbimage.cfg file this way: BOOT_FROM uart Tested on these Marvell eval boards: DB-MV784MP-GP - Armada XP DB-88F6820-GP - Armada 38x Signed-off-by: Stefan Roese Cc: Dirk Eibach Cc: Kevin Smith Cc: Luka Perkov --- Makefile | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index fd06024104..3b2eebf4b7 100644 --- a/Makefile +++ b/Makefile @@ -901,7 +901,7 @@ MKIMAGEFLAGS_u-boot.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \ -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) MKIMAGEFLAGS_u-boot-spl.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \ - -T kwbimage -a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) + -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \ -R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage @@ -909,8 +909,18 @@ MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \ u-boot.img u-boot.kwb u-boot.pbl: u-boot.bin FORCE $(call if_changed,mkimage) +# If the kwboot xmodem protocol is used, to boot U-Boot on the MVEBU +# SoC's, the SPL U-Boot returns to the BootROM after it completes +# the SDRAM setup. The BootROM expects no U-Boot header in the main +# U-Boot image. So we need to combine SPL and u-boot.bin instead of +# u-boot.img in this case. +ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT +u-boot-spl.kwb: u-boot.bin spl/u-boot-spl.bin FORCE + $(call if_changed,mkimage) +else u-boot-spl.kwb: u-boot.img spl/u-boot-spl.bin FORCE $(call if_changed,mkimage) +endif MKIMAGEFLAGS_u-boot-dtb.img = $(MKIMAGEFLAGS_u-boot.img) -- cgit v1.2.3