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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/PciBus.h
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@@ -268,6 +268,12 @@ struct _PCI_IO_DEVICE {
UINT32 SystemPageSize;
UINT16 InitialVFs;
UINT16 ReservedBusNum;
//
// Per PCI to PCI Bridge spec, I/O window is 4K aligned,
// but some chipsets support non-stardard I/O window aligments less than 4K.
// This field is used to support this case.
//
UINT16 BridgeIoAlignment;
};
#define PCI_IO_DEVICE_FROM_PCI_IO_THIS(a) \