In macppc ofwboot, sync instruction cache before entering kernel

My PowerBook G4 had some old code in its instruction cache when it
jumped into OpenBSD's kernel.  If I got unlucky with a reordered
kernel, it would trip over the old code, trap into ddb, and fail to
boot.  The same kernel would boot fine on a different macppc with
different firmware.  This problem is rare; I got unlucky only twice,
on 2022-04-26 and 2024-07-01.

This fix tells ofwboot to invalidate the instruction cache for the
loaded kernel before jumping there.

Adapted from NetBSD src/sys/arch/macppc/stand/ofwboot/boot.c

0 files changed, 0 insertions, 0 deletions