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powerpc/47x: Make sure mcsr is cleared before enabling machine check interrupts

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Clear the machine check syndrom register before enabling machine check
interrupts.  The initial state of the tlb can lead to parity errors being
flagged early after a cold boot.

Signed-off-by: Dave Kleikamp <[email protected]>
Signed-off-by: Josh Boyer <[email protected]>
This commit is contained in:
Dave Kleikamp 2010-08-18 06:44:23 +00:00 • committed by Josh Boyer
commit 029b8f662b
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/kernel/head_44x.S
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@ -113,6 +113,10 @@ _ENTRY(_start);
stw r5, 0(r4) /* Save abatron_pteptrs at a fixed location */
stw r6, 0(r5)
/* Clear the Machine Check Syndrome Register */
li r0,0
mtspr SPRN_MCSR,r0
/* Let's move on */
lis r4,start_kernel@h
ori r4,r4,start_kernel@l