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| author | rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-24 11:58:04 +0000 |
|---|---|---|
| committer | rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-24 11:58:04 +0000 |
| commit | 1ef267831621d709d685c6e65856bdf711ea7b79 (patch) | |
| tree | 2567e917b1103dd46241552267d0d2ff05248900 /MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h | |
| parent | 423401f9ea83daffc754864b922f56f06a84cbab (diff) | |
| download | edk2-1ef267831621d709d685c6e65856bdf711ea7b79.tar.gz edk2-1ef267831621d709d685c6e65856bdf711ea7b79.tar.bz2 edk2-1ef267831621d709d685c6e65856bdf711ea7b79.zip | |
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.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9598 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h index 722f31d03c..90fdaa3b62 100644 --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h @@ -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) \
|