[Buildroot] [PATCH 1/3 v3] uboot: Add support for U-Boot SPL
Arnout Vandecappelle
arnout at mind.be
Sun Mar 18 14:16:21 UTC 2012
On Monday 12 March 2012 23:41:10 Nicolas Dechesne wrote:
> SPL is a first stage bootloader. On pandaboard it supercedes x-loader,
> and should now be used.
>
> This patch ensures that either SPL or xloader can be selected
>
> Signed-off-by: Nicolas Dechesne <n-dechesne at ti.com>
> Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
> ---
> boot/uboot/Config.in | 9 +++++++++
> boot/uboot/uboot.mk | 2 ++
> 2 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/boot/uboot/Config.in b/boot/uboot/Config.in
> index c8db9fb..95187f9 100644
> --- a/boot/uboot/Config.in
> +++ b/boot/uboot/Config.in
> @@ -137,4 +137,13 @@ config BR2_TARGET_UBOOT_ETH1ADDR
>
> endif # BR2_TARGET_UBOOT_NETWORK
>
> +config BR2_TARGET_UBOOT_SPL
> + bool "U-Boot SPL support"
> + depends on !BR2_TARGET_XLOADER
> + help
> + Enable the U-Boot SPL support. SPL is a first stage
> + bootloader loaded into internal memory in charge of
> + enabling and configuring the external memory (DDR),
> + and load the u-boot program into DDR.
> +
> endif # BR2_TARGET_UBOOT
> diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk
> index db9de8d..41745c9 100644
> --- a/boot/uboot/uboot.mk
> +++ b/boot/uboot/uboot.mk
> @@ -88,6 +88,8 @@ endef
>
> define UBOOT_INSTALL_IMAGES_CMDS
> cp -dpf $(@D)/$(UBOOT_BIN) $(BINARIES_DIR)/
> + $(if $(BR2_TARGET_UBOOT_SPL),
> + cp -dpf $(@D)/MLO $(BINARIES_DIR)/)
I didn't realize before, but it's only on OMAP that the SPL is called
MLO. Its normal name is u-boot-spl.bin.
I'm not sure how this could be solved. The simplest way would be
something like (untested, as usual):
ifeq ($(BR2_TARGET_UBOOT_SPL),y)
define UBOOT_INSTALL_IMAGES_SPL
if [ -e $(@D)/MLO ]; then \
cp -dpf $(@D)/MLO $(BINARIES_DIR)/; \
else \
cp -dpf $(@D)/u-boot-spl.bin $(BINARIES_DIR)/; \
fi
endef
endif
The alternative would be to make a separate config entry for MLO and
other SPLs. Which does make some kind of sense, I guess.
Regards,
Arnout
> endef
>
> $(eval $(call GENTARGETS))
>
--
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286540
Essensium/Mind http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint: 7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F
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