Hi,
this series introduces SPL support for the Allwinner A64 SoC. In contrast to the previous RFC this one includes support for both AArch64 and AArch32 SPL builds. Still the FIT support is missing, which means the functionality is limited. Due to the missing ARM Trusted Firmware (ATF) in this firmware chain one loses Ethernet and SMP, among other minor things. I will send the FIT support later on top of this.
The first two patches are fixes that I sent out before, not sure if they landed somewhere already. Patch 2-8 prepare the SPL code to be compiled for 64-bit in general and AArch64 in particular. Patch 9-11 refactor the existing boot0 header functionality to be used by patch 12, which introduces the 64-bit switch in the first SPL instructions. Patches 13-18 then introduce the actual core of the SPL support: the DRAM initialization, courtesy of Jens. This piggy backs on the existing H3 DRAM code, deviating where needed. Patch 19 finally enables the 64-bit SPL support. So now building the existing pine64_plus_defconfig will generate a sunxi-spl.bin, which can be prepended to the U-Boot proper image (not .bin) to boot from an SD card. Due to the missing ATF support this is of limited usability at the moment, though. Also FEL support requires more love - to switch back to AArch32 before returning to FEL (without crashing, that is ;-), so this is disabled. On my setup this results in a 26KB SPL binary, which is close to the 28K limit mksunxiboot imposes at the moment. Adding anything (like FIT support or DEBUG) will exceed this, and although I have patches to let mksunxiboot get close to 32KB, this is the ulimate frontier.
So patches 20-23 then teach the SPL how to detect an U-Boot image file of a different bitness and do the RMR switch from AArch32 to AArch64, if needed. This is used by the final patch 24, which creates another _defconfig to let the SPL compile for AArch32 using the Thumb2 encoding. This results in a binary of less than 17KB in my case, so has plenty of room for extensions.
I know this is nasty stuff, so I appreciate any comments.
Cheers, Andre.
Andre Przywara (21): drivers: SPI: sunxi SPL: fix warning sun6i: Restrict some register initialization to Allwinner A31 SoC armv8: prevent using THUMB armv8: add lowlevel_init.S SPL: tiny-printf: add "l" modifier move UL() macro from armv8/mmu.h into common.h SPL: make struct spl_image 64-bit safe armv8: add simple sdelay implementation armv8: move reset branch into boot hook ARM: boot0 hook: remove macro, include whole header file sunxi: introduce extra config option for boot0 header sunxi: A64: do an RMR switch if started in AArch32 mode sunxi: provide default DRAM config for sun50i in Kconfig sunxi: H3/A64: fix non-ODT setting sunxi: DRAM: fix H3 DRAM size display on aarch64 sunxi: A64: enable SPL SPL: read and store arch property from U-Boot image Makefile: use "arm64" architecture for U-Boot image files ARM: SPL/FIT: differentiate between arm and arm64 arch properties sunxi: introduce RMR switch to enter payloads in 64-bit mode sunxi: A64: add 32-bit SPL support
Jens Kuske (3): sunxi: H3: add and rename some DRAM contoller registers sunxi: H3: add DRAM controller single bit delay support sunxi: A64: use H3 DRAM initialization code for A64
Makefile | 9 +- arch/arm/cpu/armv7/omap-common/boot-common.c | 2 +- arch/arm/cpu/armv8/Makefile | 1 + arch/arm/cpu/armv8/cpu.c | 13 ++ arch/arm/cpu/armv8/lowlevel_init.S | 44 +++++ arch/arm/cpu/armv8/start.S | 5 +- arch/arm/include/asm/arch-bcm235xx/boot0.h | 8 +- arch/arm/include/asm/arch-bcm281xx/boot0.h | 8 +- arch/arm/include/asm/arch-sunxi/boot0.h | 34 +++- arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 1 + arch/arm/include/asm/arch-sunxi/dram.h | 2 +- arch/arm/include/asm/arch-sunxi/dram_sun8i_h3.h | 51 +++--- arch/arm/include/asm/armv8/mmu.h | 8 - arch/arm/lib/Makefile | 2 + arch/arm/lib/spl.c | 15 ++ arch/arm/lib/vectors.S | 1 - arch/arm/mach-sunxi/Makefile | 2 + arch/arm/mach-sunxi/board.c | 2 +- arch/arm/mach-sunxi/clock_sun6i.c | 7 +- arch/arm/mach-sunxi/dram_sun8i_h3.c | 215 +++++++++++++++++------- arch/arm/mach-sunxi/spl_switch.c | 60 +++++++ arch/arm/mach-tegra/spl.c | 2 +- board/sunxi/Kconfig | 32 +++- common/spl/spl.c | 9 +- common/spl/spl_fit.c | 8 + common/spl/spl_mmc.c | 2 +- configs/pine64_plus_defconfig | 6 +- configs/sun50i_spl32_defconfig | 11 ++ drivers/mtd/spi/sunxi_spi_spl.c | 3 +- include/common.h | 10 +- include/configs/sunxi-common.h | 4 +- include/spl.h | 19 ++- lib/tiny-printf.c | 43 +++-- 33 files changed, 488 insertions(+), 151 deletions(-) create mode 100644 arch/arm/cpu/armv8/lowlevel_init.S create mode 100644 arch/arm/mach-sunxi/spl_switch.c create mode 100644 configs/sun50i_spl32_defconfig