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PCI Bus Driver Enhancement

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3960 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
xli24
2007-09-28 04:40:49 +00:00
parent 73c7e13392
commit ff62de3730
4 changed files with 43 additions and 7 deletions
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10
IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
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@ -2161,7 +2161,7 @@ Returns:
}
EFI_STATUS
ResetAllPpbBusReg (
ResetAllPpbBusNumber (
IN PCI_IO_DEVICE *Bridge,
IN UINT8 StartBusNumber
)
@ -2188,6 +2188,7 @@ Returns:
UINT32 Register;
UINT8 Func;
UINT64 Address;
UINT8 SecondaryBus;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
PciRootBridgeIo = Bridge->PciRootBridgeIo;
@ -2207,6 +2208,7 @@ Returns:
);
if (!EFI_ERROR (Status) && (IS_PCI_BRIDGE (&Pci))) {
Register = 0;
Address = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0x18);
Status = PciRootBridgeIoRead (
@ -2217,6 +2219,12 @@ Returns:
1,
&Register
);
SecondaryBus = (UINT8)(Register >> 8);
if (SecondaryBus != 0) {
ResetAllPpbBusNumber (Bridge, SecondaryBus);
}
//
// Reset register 18h, 19h, 1Ah on PCI Bridge
//