x86/PCI: host mmconfig detect clean up

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Fix mmconfig detection to not assume a single mmconfig space in the
northbridge, paving the way for AMD fam10h + mcp55 CPUs.  On those, the
MSR has some range, but the mcp55 pci config will have another one.

Also helps the mcp55 + io55 case, where every one will have one range.

If it is mcp55, exclude the range that is used by CPU MSR, in other
words , if the CPU claims busses 0-255, the range in mcp55 is dropped,
because CPU HW will not route those ranges to mcp55 mmconfig to handle
it.

Signed-off-by: Yinghai Lu <yinghai.lu@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

...

This commit is contained in:

Yinghai Lu 2009-03-19 20:55:35 -07:00 • committed by Jesse Barnes

parent fafad5bf06

commit 068258bc15

2 changed files with 120 additions and 60 deletions

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161

arch/x86/pci/mmconfig-shared.c

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15

arch/x86/pci/mmconfig_64.c

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