[coreboot] are the pci devices scanned two rounds?
marcj303 at gmail.com
Wed Sep 26 19:15:57 CEST 2012
On Wed, Sep 26, 2012 at 4:14 AM, 王思源 <wangsiyuanbuaa at gmail.com> wrote:
> it seems that the pci devices are scanned two rounds in our mainboard.
> first round: bus 0 -> bridge 00:14.4 -> bus 1 (this is the vga device
> under the bridge 00:14.4)
> second round: bus 0 -> bridge 00:02.0 -> bridge 00:04.0 -> bridge
> 00:05.0. this bridges are all pcie bridges.
> I want to know whether the two rounds scanning style is right. if it
> is designed to scan two rounds, why?
> any reply is helpful to me.
> thank you!
Yes, there are multiple steps in device tress and pci resource
discovery and allocation.
> WANG Siyuan
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