This is an updated and slightly extended version of the SPL FIT loading series I posted as an RFC some weeks ago. I tried to fix all bugs that have been pointed out by the diligent reviewers, also added patches to automatically build the FIT images.
The first patch is a bug fix for a regression introduced with -rc1. I put this in there to allow people testing the series and to provide an actual patch for this fix, which should make it still into 2017.03. The next four patches introduce the core of the extened SPL FIT loading support, see below for a description. Patches 6-9 make some room in the sunxi 64-bit SPL to allow compiling in the FIT loading bits. Patch 10 and 11 let the SPL choose the proper DT from the FIT image. The next two patches add the infrastructure and an actual generator script, so the FIT image is automatically created at build time. Patches 14 and 15 enable the SPL FIT support in the Pine64 and the OrangePi PC 2 defconfigs. The last two patches are new and eventually store a DT file name in the SPL header, so U-Boot can easily pick the proper DT when scanning the FIT image. The idea is that this DT name should stay with the board, ideally on eMMC or SPI flash. So both U-Boot and a firmware update tool could identify a board, updating with compatible firmware while keeping the DT name in place. Ideally a board vendor would once seed this name onto on-board storage like SPI flash.
Let me know what you think!
Cheers, Andre.
Based on top of sunxi/master (35affe7698e9).
------- Currently the FIT format is not used to its full potential in the SPL: It only loads the first image from the /images node and appends the proper FDT. Some boards and platforms would benefit from loading more images before starting U-Boot proper, notably Allwinner A64 and ARMv8 Rockchip boards, which use an ARM Trusted Firmware (ATF) image to be executed before U-Boot.
This series tries to solve this in a board agnostic and generic way: We extend the SPL FIT loading scheme to allow loading multiple images. So apart from loading the image which is referenced by the "firmware" property in the respective configuration node and placing the DTB right behind it, we iterate over all strings in the "loadable" property. Each image referenced there will be loaded to its specified load address. The entry point U-Boot eventually branches to will be taken from the first image to explicitly provide the "entry" property, or, if none of them does so, from the load address of the "firmware" image. This keeps the scheme compatible with the FIT images our Makefile creates automatically at the moment. Apart from the already mentioned ATF scenario this opens up more usage scenarios, of which the commit message of patch 04/11 lists some. The remaining patches prepare ane finally enable this scheme for the 64-bit Allwinner boards.
Andre Przywara (15): SPL: FIT: refactor FDT loading SPL: FIT: rework U-Boot image loading SPL: FIT: factor out spl_load_fit_image() SPL: FIT: allow loading multiple images tools: mksunxiboot: allow larger SPL binaries armv8: SPL: only compile GIC code if needed armv8: fsl: move ccn504 code into FSL Makefile sunxi: A64: move SPL stack to end of SRAM A2 sunxi: SPL: store RAM size in gd sunxi: SPL: add FIT config selector for Pine64 boards Makefile: add rules to generate SPL FIT images sunxi: A64: Pine64: introduce FIT generator script sunxi: Pine64: defconfig: enable SPL FIT support sunxi: OrangePi-PC2: defconfig: enable SPL FIT support sunxi: use SPL header DT name for FIT board matching
Philipp Tomsich (1): armv8: spl: Call spl_relocate_stack_gd for ARMv8
Siarhei Siamashka (1): sunxi: Store the device tree name in the SPL header
Kconfig | 17 ++ Makefile | 20 +++ arch/arm/cpu/armv8/fsl-layerscape/Makefile | 1 + arch/arm/include/asm/arch-sunxi/spl.h | 19 ++- arch/arm/lib/Makefile | 3 +- arch/arm/lib/crt0_64.S | 14 +- board/sunxi/board.c | 36 ++++- board/sunxi/mksunxi_fit_atf.sh | 73 +++++++++ common/spl/spl_fit.c | 246 +++++++++++++++++------------ configs/orangepi_pc2_defconfig | 6 + configs/pine64_plus_defconfig | 6 + include/configs/sunxi-common.h | 17 +- scripts/Makefile.spl | 3 +- tools/mksunxiboot.c | 51 +++++- 14 files changed, 387 insertions(+), 125 deletions(-) create mode 100755 board/sunxi/mksunxi_fit_atf.sh