diff options
Diffstat (limited to 'OvmfPkg/Library')
| -rw-r--r-- | OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.c b/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.c index 567f6f9..7c1f375 100644 --- a/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.c +++ b/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.c @@ -986,6 +986,50 @@ TranslatePciOfwNodes ( Eui64[7], Eui64[6], Eui64[5], Eui64[4],
Eui64[3], Eui64[2], Eui64[1], Eui64[0]
);
+ } else if (NumNodes >= FirstNonBridge + 2 &&
+ SubstringEq (OfwNode[FirstNonBridge + 0].DriverName, "usb") &&
+ SubstringEq (OfwNode[FirstNonBridge + 1].DriverName, "storage")) {
+ //
+ // OpenFirmware device path (usb-storage device in XHCI port):
+ //
+ // /pci@i0cf8/usb@3[,1]/storage@2/channel@0/disk@0,0
+ // ^ ^ ^ ^ ^ ^ ^
+ // | | | | fixed fixed
+ // | | | XHCI port number, 1-based
+ // | | PCI function corresponding to XHCI (optional)
+ // | PCI slot holding XHCI
+ // PCI root at system bus port, PIO
+ //
+ // UEFI device path prefix:
+ //
+ // PciRoot(0x0)/Pci(0x3,0x1)/USB(0x1,0x0)
+ // ^ ^
+ // | XHCI port number in 0-based notation
+ // 0x0 if PCI function is 0, or absent from OFW
+ //
+ RETURN_STATUS ParseStatus;
+ UINT64 OneBasedXhciPort;
+
+ NumEntries = 1;
+ ParseStatus = ParseUnitAddressHexList (
+ OfwNode[FirstNonBridge + 1].UnitAddress,
+ &OneBasedXhciPort,
+ &NumEntries
+ );
+ if (RETURN_ERROR (ParseStatus) || OneBasedXhciPort == 0) {
+ return RETURN_UNSUPPORTED;
+ }
+
+ Written = UnicodeSPrintAsciiFormat (
+ Translated,
+ *TranslatedSize * sizeof (*Translated), // BufferSize in bytes
+ "PciRoot(0x%x)%s/Pci(0x%Lx,0x%Lx)/USB(0x%Lx,0x0)",
+ PciRoot,
+ Bridges,
+ PciDevFun[0],
+ PciDevFun[1],
+ OneBasedXhciPort - 1
+ );
} else {
//
// Generic OpenFirmware device path for PCI devices:
|