This series tries to solve three issues we currently have on Allwinner boards: - The DRAM sizing routine can only cope with power-of-two sized DRAM. - The DRAM sizing routine steps through all DRAM, possibly hitting secure memory. - The SPL header versioning is quite strict and tends to break every time we need to update it. - On some Allwinner SoCs the maximum supported DRAM size of the DRAM controller is bigger than the accessible DRAM size of the CPU.
So Andre Przywara adapted something along the lines of semantic versioning[1], where we can add backwards-compatible changes to the SPL header without breaking every tool.
The second patch and the third patches introduces the version schema and does necessary refactors, then the fourth and the fifth patches prepare for 3GiB memory support. The sixth patch finally enables the SPL header to store the the DRAM size, and let U-Boot binary check which range is accessible when picking the data.
The first patch is a prepare for the other patches, as without it newly introduced code will make H6 SPL overflow, which makes the patchset not possible to test, as the only available 3GiB DRAM device now is the 3GiB version of Pine H64 sample.
Andre Przywara (3): sunxi: Extend SPL header versioning sunxi: board.c: refactor SPL header checks sunxi: store DRAM size in SPL header
Icenowy Zheng (3): sunxi: disable Pine A64 model detection code on other boards sunxi: map DRAM part with 3G size sunxi: add Kconfig option for the maximum accessible DRAM
arch/arm/include/asm/arch-sunxi/spl.h | 22 +++++--- arch/arm/mach-sunxi/Kconfig | 18 +++++++ arch/arm/mach-sunxi/board.c | 2 +- board/sunxi/board.c | 74 ++++++++++++++++++++++----- configs/pine64_plus_defconfig | 1 + 5 files changed, 97 insertions(+), 20 deletions(-)