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diff --git a/README.md b/README.md new file mode 100644 index 0000000..34fdf32 --- /dev/null +++ b/README.md @@ -0,0 +1,28 @@ +# tashaboot + +Small multi stage bootloader for powerpc and arm64. The goal is a +bootloader you can read in an afternoon. Every knob is a #define in one +obvious place, each board is a board.h, and the flasher takes an +editable boot.conf. + +Scope, plainly: tashaboot lives in the loaded payload slot, the one +device firmware hands off to. On qcom that is the ABL / BOOT partition +slot, on open firmware boxes it is whatever that stage loads. It loads +a kernel, or chainloads another bootloader, lk2nd style. The boot ROM +is upstream of all of that, it decides whether tashaboot ever runs, and +tashaboot does not touch it. + +Targets: +- powerpc: qemu pseries and the OSUOSL LPAR it runs on +- arm64: qemu virt first, real boards after + +Design rules: +- small enough to read in one sitting, no mini libc, no driver zoo +- board.h per board, one config header per arch +- boot.conf parsed at flash time, not boot time +- fail loud: if a load fails you see it on the console, not a hang + +Status: skeleton. No code yet. C base first (OSU senior project +candidate), asm and bringup after. + +License: GPL-2.0 |