u-boot/arch/arm/mach-rmobile
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
..
include/mach ARM: dts: renesas: Add RZ/A1 platform code 2019-05-07 05:41:32 +02:00
board.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
cpu_info-r8a7740.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
cpu_info-rcar.c ARM: rmobile: Drop PRR syscon driver 2018-10-18 20:38:27 +02:00
cpu_info-sh73a0.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
cpu_info.c CONFIG_SPL_SYS_[DI]CACHE_OFF: add 2019-05-18 08:15:35 -04:00
emac.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Kconfig ARM: rmobile: Add recovery SPL for R-Car Gen3 2019-05-21 22:15:31 +02:00
Kconfig.32 ARM: rmobile: Imply pinctrl drivers per SoC 2019-02-25 16:07:41 +01:00
Kconfig.64 pinctrl: renesas: Add R8A77965 pin control tables 2019-04-09 18:19:10 +02:00
Kconfig.rza1 ARM: dts: renesas: Add RZ/A1 GR-Peach board 2019-05-07 05:41:32 +02:00
lowlevel_init.S SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
lowlevel_init_ca15.S SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
lowlevel_init_gen3.S ARM: renesas: Save boot parameters passed in by ATF 2019-04-09 18:19:09 +02:00
Makefile ARM: rmobile: Add recovery SPL for R-Car Gen3 2019-05-21 22:15:31 +02:00
memmap-gen3.c ARM: rmobile: Fix to enable icache early in Gen3 2018-12-07 16:31:15 +01:00
pfc-r8a7740.c ARM: rmobile: Move SoC sources to mach-rmobile 2016-08-17 10:25:28 +09:00
pfc-r8a7790.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
pfc-sh73a0.c ARM: rmobile: Move SoC sources to mach-rmobile 2016-08-17 10:25:28 +09:00
timer.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00