[coreboot] (no subject)

[Nick]

Sorry for not adding a subject to this thread - realized the second after I
hit send :)

I made some progress by manually adding IOAPIC #4 (assuming its address is
fixed) - Linux kernel does not panic anymore and some IRQ routing started
working, but there are still some issues.

I'm still wondering why the detection code used on other MCP-55 boards
fails.

On Wed, May 13, 2015 at 12:15 PM, Nick <nochristrequired at gmail.com> wrote:

> Hi,
>
> I'm looking for a little advice (or steering in the right direction) in
> regards to IOAPICs and how Coreboot manages detection. I have two MCP-55
> chipsets just like the nVidia l1_2pvv board.
>
> When I boot Linux under the *vendor bios* with apic debugging enabled, I
> can see that I have two IOAPICs-
>
> [    0.000000] IOAPIC[0]: apic_id 4, version 17, address 0xfec00000, GSI
> 0-23
> [    0.000000] IOAPIC[1]: apic_id 5, version 17, address 0xb0400000, GSI
> 24-47
>
> And, when I boot using Coreboot*,* I have only one-
>
> [    0.000000] IOAPIC[0]: apic_id 5, version 17, address 0xf4340000, GSI
> 0-23
>
> Now, I'm sure this output is coming from the MP Table which Linux is
> reading back.
>
> In mptable.c a lot of the MCP-55 boards share this detection code for
> building the MP Table. Mine will only enter the if statement for bus_mcp55b.
>
> get_bus_conf();
> sbdn = sysconf.sbdn;
> m = sysconf.mb;
>
>
> dev = dev_find_slot(m->bus_mcp55, PCI_DEVFN(sbdn+ 0x1,0));
> if (dev) {
> res = find_resource(dev, PCI_BASE_ADDRESS_1);
> if (res)
> smp_write_ioapic(mc, m->apicid_mcp55, 0x11, res->base);
>
>
> if (m->bus_mcp55b) {
> dev = dev_find_slot(m->bus_mcp55b, PCI_DEVFN(m->sbdnb + 0x1,0));
> if (dev) {
> res = find_resource(dev, PCI_BASE_ADDRESS_1);
> if (res)
> smp_write_ioapic(mc, m->apicid_mcp55b, 0x11, res->base);
>
> So, my question is - what is responsible for detecting the IOAPICs? Is
> there some configuration somewhere which I may be missing? Any tips for
> where to look?
>
> Here's a full output from Coreboot and the Linux kernel(apic=debug
> show_lapic=all): *http://pastebin.com/PMVtt6hU
> <http://pastebin.com/PMVtt6hU>*
>
> Here's Linux kernel output from the vendor bios:* http://pastebin.com/VscyMxM2
> <http://pastebin.com/VscyMxM2>* (MPTable @ line 110.)
>
> Thanks in advance!
>
> -Nick
>
>
>
> --
> coreboot mailing list: coreboot at coreboot.org
> http://www.coreboot.org/mailman/listinfo/coreboot
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.coreboot.org/pipermail/coreboot/attachments/20150513/eadff0e8/attachment.html>