#!/bin/bash
# B6P rollback — restore the B5b cache (ext2 extlinux -> exact golden mm1, 409bbb11). Needs 9008 via HW EDL (D+->GND). boot/aboot untouched.
# After this, power-on boots golden mm1 via extlinux again. (Deeper rollback to stock Android cache: b5b/B5b-rollback.sh, 817118e4.)
cd ~/doc/modem/jz08-aurora || exit 1
L=firehose/007050e100000000_394a2e47cf830150_fhprg_peek.bin ; O=logs/b6p/rollback ; mkdir -p $O
B=b5b/cache-extlinux-mm1.img
[ "$(sha256sum $B | cut -d' ' -f1)" = 409bbb11c34d95c867c5cc1a33a686a7ecd5fcb4d43b5c592f334cd402114ed9 ] || { echo "STOP: rollback image hash"; exit 1; }
edl --loader=$L printgpt > $O/00-printgpt.log 2>&1
edl --loader=$L w cache $B > $O/cache-w.log 2>&1
edl --loader=$L r cache $O/cache-rb.bin > /dev/null 2>&1 ; cmp $B $O/cache-rb.bin && echo CACHE_RESTORED_B5B
sha256sum $B $O/cache-rb.bin