u-boot/arch
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
..
arc CONFIG_SPL_SYS_[DI]CACHE_OFF: add 2019-05-18 08:15:35 -04:00
arm ARM: rmobile: Add recovery SPL for R-Car Gen3 2019-05-21 22:15:31 +02:00
m68k m68k: ColdFire mcf5441x, add eSDHC support 2018-09-16 00:01:13 +02:00
microblaze spl: fix linker size check off-by-one errors 2019-05-05 08:48:50 -04:00
mips net: mscc: ocelot: Update DTS for Luton pcb90 2019-05-03 16:46:36 +02:00
nds32 CONFIG_SPL_SYS_[DI]CACHE_OFF: add 2019-05-18 08:15:35 -04:00
nios2 .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-06-18 14:43:12 -04:00
powerpc mpc83xx: Add gazerbeam board 2019-05-21 08:03:38 +02:00
riscv CONFIG_SPL_SYS_[DI]CACHE_OFF: add 2019-05-18 08:15:35 -04:00
sandbox Various minor sandbox iumprovements 2019-04-24 12:27:29 -04:00
sh sh: sh3: Remove CPU support 2019-05-10 22:43:18 +02:00
x86 x86: coreboot: make it possible to process unhandled tags 2019-05-19 16:17:33 +08:00
xtensa CONFIG_SPL_SYS_[DI]CACHE_OFF: add 2019-05-18 08:15:35 -04:00
.gitignore
Kconfig Merge tag 'rockchip-for-v2019.07-rc1' of git://git.denx.de/u-boot-rockchip 2019-05-09 12:36:17 -04:00