Wolfgang (and others who can/want),
Please test this patch; it should add a complete barrier to make sure that all fixups are written to RAM before jumping there, and that no remnants subsist of the old unfixed code in the instruction paths. However, I cannot even do basic testing on it as I have no 1136 board, so I cannot rule out even basic mistakes.
When this works I'll do a proper [PATCH].
Amicalement, Albert.
diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index 8b63192..f49f1de 100644 --- a/arch/arm/cpu/arm1136/start.S +++ b/arch/arm/cpu/arm1136/start.S @@ -257,6 +257,11 @@ fixloop: add r2, r2, #4 cmp r2, r3 bne fixloop + /* fixups done, cleanup caches if used and prefetch buffer */ + mov r3, #0 + mcr p15, 0, r3, c7, c10, 4 /* data synchronization barrier */ + mcr p15, 0, r3, c7, c5, 0 /* invalidate instruction cache */ + mcr p15, 0, r3, c7, c5, 4 /* flush prefetch buffer */ #endif #endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */