[coreboot] Cold reset in Tyan s2912
yinghailu at gmail.com
Tue Feb 5 18:45:36 CET 2008
On Feb 5, 2008 7:48 AM, Roman Kononov <kononov at dls.net> wrote:
> On 2008-02-05 00:48 yhlu said the following:
> > On Feb 4, 2008 9:29 PM, Roman Kononov <kononov at dls.net> wrote:
> >> I have difficulty cold-resetting Tyan s2912, which has mcp55.
> >> The sequence
> >> outb(0x2,0xcf9);
> >> outb(0x6,0xcf9);
> >> is a warm reset. It does not reset the HyperTransport link frequency and width.
> > how do you know?
> > do you have other co-processor or htx installed?
> I have a co-processor.
> The sequence I hope to have:
> 1) Power up. Power-on reset. The co-processor takes long time to become
> alive (~500s). By this time the CPU thinks that the HT link is dead.
> 2) CPU issues another reset.
> 3) The CPU re-initializes the HT link and the connection is happy.
> With the above sequence, the step 3) is a warm reset, and the CPU does
> not attempt to re-initialize the link.
that is co-processor problem.
Please talk the co-processor vendor about that. they have solution for
you problem. otherwise return that to get one from another vendor.
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