On 01/20/2015 03:42 PM, Timothy Pearson wrote:
On 01/20/2015 03:36 PM, Jonathan A. Kollasch wrote:
On Tue, Jan 20, 2015 at 03:28:45PM -0600, Timothy Pearson wrote:
On 01/20/2015 01:55 PM, Timothy Pearson wrote:
All,
I have been working on porting Coreboot to a new CK804-based K10
mainboard; it warm boots but will not cold boot due to IRQ/MSI
configuration issues.
While tracing the IRQ problem I noticed that the CK804 PCI function
numbers change from the proprietary BIOS to Coreboot:
Proprietary:
-[0000:00]-+-00.0 NVIDIA Corporation CK804 Memory Controller
[10de:005e]
+-01.0 NVIDIA Corporation CK804 ISA Bridge [10de:0051]
+-01.1 NVIDIA Corporation CK804 SMBus [10de:0052]
...etc...
Coreboot:
-[0000:00]-+-01.0 NVIDIA Corporation CK804 Memory Controller
[10de:005e]
+-02.0 NVIDIA Corporation CK804 ISA Bridge [10de:0051]
+-02.1 NVIDIA Corporation CK804 SMBus [10de:0052]
This, in turn, causes Linux to not detect the CK804 root bridge.
Has anyone else seen this with the CK804 chipset? Is there a magic
register somewhere that configures the CK804 to use the "correct" PCI
function numbers?
The only pertinent quirk of this mainboard is that Asus put the
CK804 on
HT link 1, not 0 or 2 as is more common.
Thanks!
Looks like I was writing too quickly..."function number" above
should be "device number". Nothing responds to a PCI vendor ID
probe at PCI_DEV(0,0,0) which seems to indicate the CK804 itself has
renumbered its internal devices, but I don't currently know why or
how.
Coreboot supports dual-ck804 boards, perhaps the ck804 got enumerated
at the
secondary offset? (starting at something like bus 0x40 or 0x80)
Jonathan Kollasch
I had thought of that, but the bus number reported is 00 (correct) while
the device numbers are off by one. I have placed the CK804 on bus 1 for
debugging but all that does is cause the boot to fail earlier as
Coreboot itself looks for the CK804 on bus 0; the PCI device numbers
stay at their incorrectly shifted values.
Is there an example of the lspci output for a dual-CK804 board? A quick
Google search didn't turn up anything; I wanted to see if the CK804
detects the HT link it's on and shifts its device numbering.
Thanks!
For anyone interested I manually located the offending control register:
CK804 PCI configuration register 0x44 bit 16 (quite possibly a single
nibble in bits 19-16, though this is untested) controls the device
numbering offset. My CK804 initialized that nibble to 1; clearing it
reset the device numbering
--
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645
http://www.raptorengineeringinc.com
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