diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2009-09-11 15:28:41 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-09-15 21:30:09 -0500 |
| commit | 15fba3279b56333bdb65ead366f82c945ed320d1 (patch) | |
| tree | fdfec8225f9a34aa7b8f2cf8f2fa877039a0c550 /cpu | |
| parent | 9f00409a9d04cf533305531da32437130802f3a3 (diff) | |
ppc/85xx: Disable all async interrupt sources when we boot
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>
Diffstat (limited to 'cpu')
| -rw-r--r-- | 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 48a82eda6d8..a6d1e999b60 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(); } |