We should make sure to clear MSR[ME, CE, DE] when we boot an OS image since we have changed the exception vectors and the OSes vectors might not be setup we should avoid async interrupts at all costs.

Signed-off-by: Kumar Gala galak@kernel.crashing.org --- cpu/mpc85xx/cpu_init.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/cpu/mpc85xx/cpu_init.c b/cpu/mpc85xx/cpu_init.c index 48a82ed..a6d1e99 100644 --- a/cpu/mpc85xx/cpu_init.c +++ b/cpu/mpc85xx/cpu_init.c @@ -364,5 +364,16 @@ extern void setup_ivors(void);

void arch_preboot_os(void) { + u32 msr; + + /* + * We are changing interrupt offsets and are about to boot the OS so + * we need to make sure we disable all async interrupts. EE is already + * disabled by the time we get called. + */ + msr = mfmsr(); + msr &= ~(MSR_ME|MSR_CE|MSR_DE); + mtmsr(msr); + setup_ivors(); }