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 <ga...@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();
}
--
1.6.0.6
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