u-boot/arch/arm/mach-rmobile/Kconfig
Marek Vasut 5602330df0 ARM: rmobile: Add recovery SPL for R-Car Gen3
Build an SPL which can be started via SCIF download mode on R-Car Gen3
and allows loading and executing U-Boot uImage with the next stage code.
This is also useful for starting e.g. ATF BL2, which inits the hardware
and returns to the U-Boot SPL, which can then load e.g. U-Boot proper.

The H3, M3-W, M3-N SoCs have plenty of SRAM for storing the U-Boot SPL
while the payload, e.g. ATF BL2, executes, so there is no problem here.

However, E3 and D3 have much less SRAM, hence the loader uses a trick
where it copies itself beyond the area used by BL2 and executes from
there. That area is 32kiB large and not enough to hold U-Boot SPL, BSS,
stack and malloc area, so the later two are placed at +0x4000 offset
from start of SRAM, another area not used by ATF BL2. To make things
even more complicated, the SCIF loader cannot load to the upper 32kiB
of the SRAM directly, hence the copying approach.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-05-21 22:15:31 +02:00

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if ARCH_RMOBILE
choice
prompt "Target Renesas SoC select"
default RCAR_32
config RCAR_32
bool "Renesas ARM SoCs R-Car Gen1/Gen2 (32bit)"
select CPU_V7A
config RCAR_GEN3
bool "Renesas ARM SoCs R-Car Gen3 (64bit)"
select ARM64
select PHY
select CMD_CACHE
select PINCTRL
select PINCONF
select PINCTRL_PFC
select SUPPORT_SPL
imply CMD_FS_UUID
imply CMD_GPT
imply CMD_UUID
imply CMD_MMC_SWRITE if MMC
imply SUPPORT_EMMC_RPMB if MMC
imply SPL
imply SPL_BOARD_INIT
imply SPL_GZIP
imply SPL_LIBCOMMON_SUPPORT
imply SPL_LIBGENERIC_SUPPORT
imply SPL_SERIAL_SUPPORT
imply SPL_SYS_MALLOC_SIMPLE
imply SPL_TINY_MEMSET
imply SPL_YMODEM_SUPPORT
imply USE_TINY_PRINTF
config RZA1
prompt "Renesas ARM SoCs RZ/A1 (32bit)"
select CPU_V7A
endchoice
source "arch/arm/mach-rmobile/Kconfig.32"
source "arch/arm/mach-rmobile/Kconfig.64"
source "arch/arm/mach-rmobile/Kconfig.rza1"
endif