Liu Tao liutao@safe-mail.net writes:
Hello,
My K8 board hangs after "ht reset -" is printed, the post card at 0x80 is reseted to 0xff, so I think 8111 has performed the RESET_L and LDTRST_L signal. On my board the LDTRST_L signal drives to the RESET_L pin of K8 and RESET# pin of 8131, is this routing OK?
Hmm I don't think LDTRESET# should drive the cpu's reset# signal. But I am not certain.
Does the RESET_L signal of K8 updates the ht freq/width during reseting the CPU?
The ht freq/width are updated earlier and the reset causes the changes to take effect.
Is this a cold/hard reset to CPU?
As opposed to a soft reset yes. The power is expected to remain on for the duration so ht freq/width can be retained in the chips.
The short answer is that optimizing the hypertransport speed and frequency is an optimization. So you can disable the reset and see how far you board gets otherwise. That should give you a little more time to debug the reset path.
Eric