Hello Walfqang, > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Marc Jones > Sent: Tuesday, January 17, 2012 3:23 AM > To: Wolfgang Kamp - datakamp > Cc: [email protected] > Subject: Re: [coreboot] Issue with CIMX/SB800 PCIe Port Initialization > > On Mon, Jan 16, 2012 at 10:18 AM, Wolfgang Kamp - datakamp > <[email protected]> wrote: > > Hello, > > > > > > > > I found a problem with the PCI enumeration of the PCIe Ports in the > > CIMX/SB800 Southbridge for the INAGUA platform. > > > > The .../southbridge/amd/cimx/sb800/late.c routine calls the function > > sb_Before_PCI_Init after > > > > case (0x16 >>3) | 2. This means when the PCI Express ports (0x15 <<3) | > 0 > > are probed in the routine ../devices/pci_device.c function > > > > pci_probe_dev they are not yet initialized. The probing fails and also > > devices behind the bridge are not recognized. > > > > Behind the PCIe bridge I have an Intel 82574 LAN chip. > > > > But if I move the call to sb_Before_PCI_Init behind case (0x15 <<3) | > 0 the > > enumeration succeed but coreboot crashes later into nothing. The Sage > > Debugger fails. > > > > I can't imagine why. > > > > > > > > Marc have you any idea? > > This looks like a problem in the sb800 cimx wrapper logic. Cimx > doesn't treat the devices separately. it lumps all the configuration > and enables together, making the coreboot chipset device enable > callback fail to enable the device, so it gets disabled. The sb900 > wrapper appears to fix this issue with cimx setup in early init. You > may want to try porting those changes to the sb800. > > I don't know why it fails later, but I assume it is due to the missing > config since you moved the call earlier in the process. You could try > calling it multiple times. I'm not sure how it handles that, though. > > Kerry, > Do you have any comments? If the enumeration fail, I suggest you should check the PCIE deassert GPIO setting. Thanks
Kerry > > > Marc > > -- > http://se-eng.com > > -- > coreboot mailing list: [email protected] > http://www.coreboot.org/mailman/listinfo/coreboot -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
