答复: Why devices ARE or NOT on bus 0 ?

[YhLu]

Does "up" "across" control something now?

cpu k8 "cpu0"
        register "across" = "{ .chip = &amd8131, .ht_width=16, .ht_speed=600
}"
end

YH

-----邮件原件-----
发件人: ebiederman at lnxi.com [mailto:ebiederman at lnxi.com] 
发送时间: 2004年4月26日 16:20
收件人: Li-Ta Lo
抄送: LinuxBIOS
主题: Re: Why devices ARE or NOT on bus 0 ?

Li-Ta Lo <ollie at lanl.gov> writes:

> On Mon, 2004-04-26 at 11:58, Eric W. Biederman wrote:
> > Li-Ta Lo <ollie at lanl.gov> writes:
> > 
> > > > You might need to specify the bridges/busses in Config.lb.
> > > > I know the current code works and can handle this.
> > > > 
> > > > > Does anyone can help on this ?
> > > > 
> > > > Without something like a serial console trace so that the details
> > > > of what are going on are clear I don't know.
> > > > 
> > > 
> > > Please see that attached log. As you ca see the HyperTransport scan
> > > is not actually done in northbridge.c:amdk8_scan_chain(). It only
> > > prints the message before and after the for loop but skip the loop.
> > 
> > Please reread my hunch below.  It looks like I nailed it on the head.
> > The fact that the first pci_scan_bus shows devices below 0x18 is
> > confirmation of this.
> > 
> > mainboard_operations needs to specify amdk8_scan_root_bus.
> > 
> 
> 
> What exactly are you talking about ? It is amdk8_scan_root_bus
> in ibm/e325/mainboard.c.
> 
> static struct device_operations mainboard_operations = {
> 	.read_resources   = root_dev_read_resources,
> 	.set_resources    = root_dev_set_resources,
> 	.enable_resources = enable_childrens_resources,
> 	.init             = mainboard_init,
> 	.scan_bus         = amdk8_scan_root_bus,
> 	.enable           = 0,
> };

Hmm.  So it is there.

For some reason it is not being called.  A missing chip.h perhaps?

My old copy of that code does:
	max = pci_scan_bus(&root->link[0], PCI_DEVFN(0x18, 0), 0xff, max);

So it starts at device 0x18 (The first cpu) and works down.  That is
not happening so that code is not being called.

I don't know why/how it is failing except possibly for fragility in
the config tool.  But I observe it is not.

Eric
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