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Update PCI bus driver to support non-standard PCI to PCI bridge I/O window alignment, such as 2K/1K/512 byte. Feature PCD PcdPciBridgeIoAlignmentProbe is introduced to turn on/off this feature.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9598 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3
2009-12-24 11:58:04 +00:00
parent 423401f9ea
commit 1ef2678316
7 changed files with 49 additions and 6 deletions
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6
MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
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@@ -236,10 +236,14 @@ PciHostBridgeResourceAllocator (
// enumerator. Several resource tree was created
//
//
// If non-stardard PCI Bridge I/O window alignment is supported,
// set I/O aligment to minimum possible alignment for root bridge.
//
IoBridge = CreateResourceNode (
RootBridgeDev,
0,
0xFFF,
FeaturePcdGet (PcdPciBridgeIoAlignmentProbe) ? 0x1FF: 0xFFF,
0,
PciBarTypeIo16,
PciResUsageTypical