On Mar 12, 2011, at 4:56 PM, Kumar Gala wrote:
On Mar 3, 2011, at 8:59 AM, Jimi Xenidis wrote:
I was surprised to find myself at the decrement interrupt when running my new stuff. That is against ePAPR, right? Does u-boot at least make sure that the DEC is set to some large value before it leaps at me? I don't mind forcing EE=0 but I'd like to make sure I make it that far into the code :) -JX
Jimi,
Not sure how or why you are seeing this, but u-boot should disable interrupts in common/cmd_bootm.c
Look for disable_interrupts() -> this should set MSR[EE] = 0.
Sorry, this is my brain fart. I was running my unit tests (on SimiCS p4080ds) and when I set MSR[EE]=1 to get a doorbell, I got a DEC (as one should according to interrupt order). Turns out that TSR[DIS] was on when my program took over, and this is ePAPR legal. I need to reset the DEC in my code.
Sorry for the confusion. -JX
- k
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