[coreboot] Bridge Mem Window/Prefetch Window
Myles Watson
mylesgw at gmail.com
Thu Feb 5 21:21:25 CET 2009
On Mon, Feb 2, 2009 at 9:01 AM, Dan Lykowski <engineerguy3737 at yahoo.com> wrote:
> CoreBoot Kernel Log:
> [ 0.412025] PCI: Bridge: 0000:00:01.0
> [ 0.416027] IO window: 1000-1fff
> [ 0.420032] MEM window: 0xfc500000-0xfc6fffff
> [ 0.427975] PREFETCH window: 0x00000000f0000000- 0x00000000f7ffffff
> [ 0.440718] PCI: Bridge: 0000:00:04.0
> [ 0.448082] IO window: 2000-2fff
> [ 0.454929] MEM window: 0xfc700000-0xfc7fffff
> [ 0.464029] PREFETCH window: disabled.
> [ 0.471919] PCI: Bridge: 0000:00:07.0
> [ 0.479285] IO window: 3000-3fff
> [ 0.486133] MEM window: 0xfc000000-0xfc4fffff
> [ 0.495233] PREFETCH window: disabled.
> [ 0.503122] PCI: Bridge: 0000:00:14.4
> [ 0.510485] IO window: disabled.
> [ 0.517322] MEM window: disabled.
> [ 0.524338] PREFETCH window: disabled.
>
> Closed BIOS:
> [ 0.412025] PCI: Bridge: 0000:00:01.0
> [ 0.416027] IO window: c000-cfff
> [ 0.420032] MEM window: 0xfdd00000-0xfdefffff
> [ 0.427975] PREFETCH window: 0x00000000d0000000- 0x00000000dfffffff
> [ 0.440718] PCI: Bridge: 0000:00:04.0
> [ 0.448082] IO window: e000-efff
> [ 0.454929] MEM window: 0xfda00000-0xfdafffff
> [ 0.464029] PREFETCH window: 0x00000000fd900000 - 0x00000000fd9fffff
> [ 0.471919] PCI: Bridge: 0000:00:07.0
> [ 0.479285] IO window: d000-dfff
> [ 0.486133] MEM window: 0xfd000000-0xfd7fffff
> [ 0.495233] PREFETCH window: 0x00000000fdf00000-0x00000000fdffffff
> [ 0.503122] PCI: Bridge: 0000:00:14.4
> [ 0.510485] IO window: b000-bffff
> [ 0.517322] MEM window: 0xfdc00000-0xfdcfffff
> [ 0.524338] PREFETCH window: 0x00000000fdb00000-0x00000000fdbfffff
I think lspci -tv would help us know what's going on here.
What devices are behind the bridges that don't have prefetchable
memory allocated to them? Is it space reserved for hot-plug?
Thanks,
Myles
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