On modern Allwinner SoCs (tested: H2+, A64, H5, H6) the BootROM can
actually load the SPL also from sector 256 (128KB) of an SD card or eMMC
chip. For more details, see [1].
In this case the boot source indicator (written at offset 0x28 of SRAM A1)
has bit 4 set, so it's 0x10 for SD card and 0x12
Hi,
I am not sure this is widely known, at least I couldn't find anything
about it:
While looking at the eMMC content of the Eachlink H6 Mini TV box, I was
surprised to find an identical boot0 copy at offset 128KB of the eMMC
device, in addition to the usual version at 8K.
Some experiments later
