diff options
Diffstat (limited to 'gnu-efi/gnu-efi-3.0/lib/dpath.c')
| -rw-r--r-- | gnu-efi/gnu-efi-3.0/lib/dpath.c | 1035 |
1 files changed, 1035 insertions, 0 deletions
diff --git a/gnu-efi/gnu-efi-3.0/lib/dpath.c b/gnu-efi/gnu-efi-3.0/lib/dpath.c new file mode 100644 index 0000000..11c1b20 --- /dev/null +++ b/gnu-efi/gnu-efi-3.0/lib/dpath.c @@ -0,0 +1,1035 @@ +/*++ + +Copyright (c) 1998 Intel Corporation + +Module Name: + + dpath.c + +Abstract: + MBR & Device Path functions + + + +Revision History + +--*/ + +#include "lib.h" + +#define ALIGN_SIZE(a) ((a % MIN_ALIGNMENT_SIZE) ? MIN_ALIGNMENT_SIZE - (a % MIN_ALIGNMENT_SIZE) : 0) + + + +EFI_DEVICE_PATH * +DevicePathFromHandle ( + IN EFI_HANDLE Handle + ) +{ + EFI_STATUS Status; + EFI_DEVICE_PATH *DevicePath; + + Status = uefi_call_wrapper(BS->HandleProtocol, 3, Handle, &DevicePathProtocol, (VOID*)&DevicePath); + if (EFI_ERROR(Status)) { + DevicePath = NULL; + } + + return DevicePath; +} + + +EFI_DEVICE_PATH * +DevicePathInstance ( + IN OUT EFI_DEVICE_PATH **DevicePath, + OUT UINTN *Size + ) +{ + EFI_DEVICE_PATH *Start, *Next, *DevPath; + UINTN Count; + + DevPath = *DevicePath; + Start = DevPath; + + if (!DevPath) { + return NULL; + } + + // + // Check for end of device path type + // + + for (Count = 0; ; Count++) { + Next = NextDevicePathNode(DevPath); + + if (IsDevicePathEndType(DevPath)) { + break; + } + + if (Count > 01000) { + // + // BugBug: Debug code to catch bogus device paths + // + DEBUG((D_ERROR, "DevicePathInstance: DevicePath %x Size %d", *DevicePath, ((UINT8 *) DevPath) - ((UINT8 *) Start) )); + DumpHex (0, 0, ((UINT8 *) DevPath) - ((UINT8 *) Start), Start); + break; + } + + DevPath = Next; + } + + ASSERT (DevicePathSubType(DevPath) == END_ENTIRE_DEVICE_PATH_SUBTYPE || + DevicePathSubType(DevPath) == END_INSTANCE_DEVICE_PATH_SUBTYPE); + + // + // Set next position + // + + if (DevicePathSubType(DevPath) == END_ENTIRE_DEVICE_PATH_SUBTYPE) { + Next = NULL; + } + + *DevicePath = Next; + + // + // Return size and start of device path instance + // + + *Size = ((UINT8 *) DevPath) - ((UINT8 *) Start); + return Start; +} + +UINTN +DevicePathInstanceCount ( + IN EFI_DEVICE_PATH *DevicePath + ) +{ + UINTN Count, Size; + + Count = 0; + while (DevicePathInstance(&DevicePath, &Size)) { + Count += 1; + } + + return Count; +} + + +EFI_DEVICE_PATH * +AppendDevicePath ( + IN EFI_DEVICE_PATH *Src1, + IN EFI_DEVICE_PATH *Src2 + ) +// Src1 may have multiple "instances" and each instance is appended +// Src2 is appended to each instance is Src1. (E.g., it's possible +// to append a new instance to the complete device path by passing +// it in Src2) +{ + UINTN Src1Size, Src1Inst, Src2Size, Size; + EFI_DEVICE_PATH *Dst, *Inst; + UINT8 *DstPos; + + // + // If there's only 1 path, just duplicate it + // + + if (!Src1) { + ASSERT (!IsDevicePathUnpacked (Src2)); + return DuplicateDevicePath (Src2); + } + + if (!Src2) { + ASSERT (!IsDevicePathUnpacked (Src1)); + return DuplicateDevicePath (Src1); + } + + // + // Verify we're not working with unpacked paths + // + +// ASSERT (!IsDevicePathUnpacked (Src1)); +// ASSERT (!IsDevicePathUnpacked (Src2)); + + // + // Append Src2 to every instance in Src1 + // + + Src1Size = DevicePathSize(Src1); + Src1Inst = DevicePathInstanceCount(Src1); + Src2Size = DevicePathSize(Src2); + Size = Src1Size * Src1Inst + Src2Size; + + Dst = AllocatePool (Size); + if (Dst) { + DstPos = (UINT8 *) Dst; + + // + // Copy all device path instances + // + + while ((Inst = DevicePathInstance (&Src1, &Size))) { + + CopyMem(DstPos, Inst, Size); + DstPos += Size; + + CopyMem(DstPos, Src2, Src2Size); + DstPos += Src2Size; + + CopyMem(DstPos, EndInstanceDevicePath, sizeof(EFI_DEVICE_PATH)); + DstPos += sizeof(EFI_DEVICE_PATH); + } + + // Change last end marker + DstPos -= sizeof(EFI_DEVICE_PATH); + CopyMem(DstPos, EndDevicePath, sizeof(EFI_DEVICE_PATH)); + } + + return Dst; +} + + +EFI_DEVICE_PATH * +AppendDevicePathNode ( + IN EFI_DEVICE_PATH *Src1, + IN EFI_DEVICE_PATH *Src2 + ) +// Src1 may have multiple "instances" and each instance is appended +// Src2 is a signal device path node (without a terminator) that is +// appended to each instance is Src1. +{ + EFI_DEVICE_PATH *Temp, *Eop; + UINTN Length; + + // + // Build a Src2 that has a terminator on it + // + + Length = DevicePathNodeLength(Src2); + Temp = AllocatePool (Length + sizeof(EFI_DEVICE_PATH)); + if (!Temp) { + return NULL; + } + + CopyMem (Temp, Src2, Length); + Eop = NextDevicePathNode(Temp); + SetDevicePathEndNode(Eop); + + // + // Append device paths + // + + Src1 = AppendDevicePath (Src1, Temp); + FreePool (Temp); + return Src1; +} + + +EFI_DEVICE_PATH * +FileDevicePath ( + IN EFI_HANDLE Device OPTIONAL, + IN CHAR16 *FileName + ) +/*++ + + N.B. Results are allocated from pool. The caller must FreePool + the resulting device path structure + +--*/ +{ + UINTN Size; + FILEPATH_DEVICE_PATH *FilePath; + EFI_DEVICE_PATH *Eop, *DevicePath; + + Size = StrSize(FileName); + FilePath = AllocateZeroPool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + sizeof(EFI_DEVICE_PATH)); + DevicePath = NULL; + + if (FilePath) { + + // + // Build a file path + // + + FilePath->Header.Type = MEDIA_DEVICE_PATH; + FilePath->Header.SubType = MEDIA_FILEPATH_DP; + SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH); + CopyMem (FilePath->PathName, FileName, Size); + Eop = NextDevicePathNode(&FilePath->Header); + SetDevicePathEndNode(Eop); + + // + // Append file path to device's device path + // + + DevicePath = (EFI_DEVICE_PATH *) FilePath; + if (Device) { + DevicePath = AppendDevicePath ( + DevicePathFromHandle(Device), + DevicePath + ); + + FreePool(FilePath); + } + } + + return DevicePath; +} + + + +UINTN +DevicePathSize ( + IN EFI_DEVICE_PATH *DevPath + ) +{ + EFI_DEVICE_PATH *Start; + + // + // Search for the end of the device path structure + // + + Start = DevPath; + while (!IsDevicePathEnd(DevPath)) { + DevPath = NextDevicePathNode(DevPath); + } + + // + // Compute the size + // + + return ((UINTN) DevPath - (UINTN) Start) + sizeof(EFI_DEVICE_PATH); +} + +EFI_DEVICE_PATH * +DuplicateDevicePath ( + IN EFI_DEVICE_PATH *DevPath + ) +{ + EFI_DEVICE_PATH *NewDevPath; + UINTN Size; + + + // + // Compute the size + // + + Size = DevicePathSize (DevPath); + + // + // Make a copy + // + + NewDevPath = AllocatePool (Size); + if (NewDevPath) { + CopyMem (NewDevPath, DevPath, Size); + } + + return NewDevPath; +} + +EFI_DEVICE_PATH * +UnpackDevicePath ( + IN EFI_DEVICE_PATH *DevPath + ) +{ + EFI_DEVICE_PATH *Src, *Dest, *NewPath; + UINTN Size; + + // + // Walk device path and round sizes to valid boundries + // + + Src = DevPath; + Size = 0; + for (; ;) { + Size += DevicePathNodeLength(Src); + Size += ALIGN_SIZE(Size); + + if (IsDevicePathEnd(Src)) { + break; + } + + Src = NextDevicePathNode(Src); + } + + + // + // Allocate space for the unpacked path + // + + NewPath = AllocateZeroPool (Size); + if (NewPath) { + + ASSERT (((UINTN)NewPath) % MIN_ALIGNMENT_SIZE == 0); + + // + // Copy each node + // + + Src = DevPath; + Dest = NewPath; + for (; ;) { + Size = DevicePathNodeLength(Src); + CopyMem (Dest, Src, Size); + Size += ALIGN_SIZE(Size); + SetDevicePathNodeLength (Dest, Size); + Dest->Type |= EFI_DP_TYPE_UNPACKED; + Dest = (EFI_DEVICE_PATH *) (((UINT8 *) Dest) + Size); + + if (IsDevicePathEnd(Src)) { + break; + } + + Src = NextDevicePathNode(Src); + } + } + + return NewPath; +} + + +EFI_DEVICE_PATH* +AppendDevicePathInstance ( + IN EFI_DEVICE_PATH *Src, + IN EFI_DEVICE_PATH *Instance + ) +{ + UINT8 *Ptr; + EFI_DEVICE_PATH *DevPath; + UINTN SrcSize; + UINTN InstanceSize; + + if (Src == NULL) { + return DuplicateDevicePath (Instance); + } + SrcSize = DevicePathSize(Src); + InstanceSize = DevicePathSize(Instance); + Ptr = AllocatePool (SrcSize + InstanceSize); + DevPath = (EFI_DEVICE_PATH *)Ptr; + ASSERT(DevPath); + + CopyMem (Ptr, Src, SrcSize); +// FreePool (Src); + + while (!IsDevicePathEnd(DevPath)) { + DevPath = NextDevicePathNode(DevPath); + } + // + // Convert the End to an End Instance, since we are + // appending another instacne after this one its a good + // idea. + // + DevPath->SubType = END_INSTANCE_DEVICE_PATH_SUBTYPE; + + DevPath = NextDevicePathNode(DevPath); + CopyMem (DevPath, Instance, InstanceSize); + return (EFI_DEVICE_PATH *)Ptr; +} + +EFI_STATUS +LibDevicePathToInterface ( + IN EFI_GUID *Protocol, + IN EFI_DEVICE_PATH *FilePath, + OUT VOID **Interface + ) +{ + EFI_STATUS Status; + EFI_HANDLE Device; + + Status = uefi_call_wrapper(BS->LocateDevicePath, 3, Protocol, &FilePath, &Device); + + if (!EFI_ERROR(Status)) { + + // If we didn't get a direct match return not found + Status = EFI_NOT_FOUND; + + if (IsDevicePathEnd(FilePath)) { + + // + // It was a direct match, lookup the protocol interface + // + + Status =uefi_call_wrapper(BS->HandleProtocol, 3, Device, Protocol, Interface); + } + } + + // + // If there was an error, do not return an interface + // + + if (EFI_ERROR(Status)) { + *Interface = NULL; + } + + return Status; +} + +VOID +_DevPathPci ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + PCI_DEVICE_PATH *Pci; + + Pci = DevPath; + CatPrint(Str, L"Pci(%x|%x)", Pci->Device, Pci->Function); +} + +VOID +_DevPathPccard ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + PCCARD_DEVICE_PATH *Pccard; + + Pccard = DevPath; + CatPrint(Str, L"Pccard(Socket%x)", Pccard->SocketNumber); +} + +VOID +_DevPathMemMap ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + MEMMAP_DEVICE_PATH *MemMap; + + MemMap = DevPath; + CatPrint(Str, L"MemMap(%d:%x-%x)", + MemMap->MemoryType, + MemMap->StartingAddress, + MemMap->EndingAddress + ); +} + +VOID +_DevPathController ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + CONTROLLER_DEVICE_PATH *Controller; + + Controller = DevPath; + CatPrint(Str, L"Ctrl(%d)", + Controller->Controller + ); +} + +VOID +_DevPathVendor ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + VENDOR_DEVICE_PATH *Vendor; + CHAR16 *Type; + UNKNOWN_DEVICE_VENDOR_DEVICE_PATH *UnknownDevPath; + + Vendor = DevPath; + switch (DevicePathType(&Vendor->Header)) { + case HARDWARE_DEVICE_PATH: Type = L"Hw"; break; + case MESSAGING_DEVICE_PATH: Type = L"Msg"; break; + case MEDIA_DEVICE_PATH: Type = L"Media"; break; + default: Type = L"?"; break; + } + + CatPrint(Str, L"Ven%s(%g", Type, &Vendor->Guid); + if (CompareGuid (&Vendor->Guid, &UnknownDevice) == 0) { + // + // GUID used by EFI to enumerate an EDD 1.1 device + // + UnknownDevPath = (UNKNOWN_DEVICE_VENDOR_DEVICE_PATH *)Vendor; + CatPrint(Str, L":%02x)", UnknownDevPath->LegacyDriveLetter); + } else { + CatPrint(Str, L")"); + } +} + + +VOID +_DevPathAcpi ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + ACPI_HID_DEVICE_PATH *Acpi; + + Acpi = DevPath; + if ((Acpi->HID & PNP_EISA_ID_MASK) == PNP_EISA_ID_CONST) { + CatPrint(Str, L"Acpi(PNP%04x,%x)", EISA_ID_TO_NUM (Acpi->HID), Acpi->UID); + } else { + CatPrint(Str, L"Acpi(%08x,%x)", Acpi->HID, Acpi->UID); + } +} + + +VOID +_DevPathAtapi ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + ATAPI_DEVICE_PATH *Atapi; + + Atapi = DevPath; + CatPrint(Str, L"Ata(%s,%s)", + Atapi->PrimarySecondary ? L"Secondary" : L"Primary", + Atapi->SlaveMaster ? L"Slave" : L"Master" + ); +} + +VOID +_DevPathScsi ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + SCSI_DEVICE_PATH *Scsi; + + Scsi = DevPath; + CatPrint(Str, L"Scsi(Pun%x,Lun%x)", Scsi->Pun, Scsi->Lun); +} + + +VOID +_DevPathFibre ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + FIBRECHANNEL_DEVICE_PATH *Fibre; + + Fibre = DevPath; + CatPrint(Str, L"Fibre(%lx)", Fibre->WWN); +} + +VOID +_DevPath1394 ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + F1394_DEVICE_PATH *F1394; + + F1394 = DevPath; + CatPrint(Str, L"1394(%g)", &F1394->Guid); +} + + + +VOID +_DevPathUsb ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + USB_DEVICE_PATH *Usb; + + Usb = DevPath; + CatPrint(Str, L"Usb(%x)", Usb->Port); +} + + +VOID +_DevPathI2O ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + I2O_DEVICE_PATH *I2O; + + I2O = DevPath; + CatPrint(Str, L"I2O(%x)", I2O->Tid); +} + +VOID +_DevPathMacAddr ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + MAC_ADDR_DEVICE_PATH *MAC; + UINTN HwAddressSize; + UINTN Index; + + MAC = DevPath; + + HwAddressSize = sizeof(EFI_MAC_ADDRESS); + if (MAC->IfType == 0x01 || MAC->IfType == 0x00) { + HwAddressSize = 6; + } + + CatPrint(Str, L"Mac("); + + for(Index = 0; Index < HwAddressSize; Index++) { + CatPrint(Str, L"%02x",MAC->MacAddress.Addr[Index]); + } + CatPrint(Str, L")"); +} + +VOID +_DevPathIPv4 ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + IPv4_DEVICE_PATH *IP; + + IP = DevPath; + CatPrint(Str, L"IPv4(not-done)"); +} + +VOID +_DevPathIPv6 ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + IPv6_DEVICE_PATH *IP; + + IP = DevPath; + CatPrint(Str, L"IP-v6(not-done)"); +} + +VOID +_DevPathInfiniBand ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + INFINIBAND_DEVICE_PATH *InfiniBand; + + InfiniBand = DevPath; + CatPrint(Str, L"InfiniBand(not-done)"); +} + +VOID +_DevPathUart ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + UART_DEVICE_PATH *Uart; + CHAR8 Parity; + + Uart = DevPath; + switch (Uart->Parity) { + case 0 : Parity = 'D'; break; + case 1 : Parity = 'N'; break; + case 2 : Parity = 'E'; break; + case 3 : Parity = 'O'; break; + case 4 : Parity = 'M'; break; + case 5 : Parity = 'S'; break; + default : Parity = 'x'; break; + } + + if (Uart->BaudRate == 0) { + CatPrint(Str, L"Uart(DEFAULT %c",Uart->BaudRate,Parity); + } else { + CatPrint(Str, L"Uart(%d %c",Uart->BaudRate,Parity); + } + + if (Uart->DataBits == 0) { + CatPrint(Str, L"D"); + } else { + CatPrint(Str, L"%d",Uart->DataBits); + } + + switch (Uart->StopBits) { + case 0 : CatPrint(Str, L"D)"); break; + case 1 : CatPrint(Str, L"1)"); break; + case 2 : CatPrint(Str, L"1.5)"); break; + case 3 : CatPrint(Str, L"2)"); break; + default : CatPrint(Str, L"x)"); break; + } +} + + +VOID +_DevPathHardDrive ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + HARDDRIVE_DEVICE_PATH *Hd; + + Hd = DevPath; + switch (Hd->SignatureType) { + case SIGNATURE_TYPE_MBR: + CatPrint(Str, L"HD(Part%d,Sig%08X)", + Hd->PartitionNumber, + *((UINT32 *)(&(Hd->Signature[0]))) + ); + break; + case SIGNATURE_TYPE_GUID: + CatPrint(Str, L"HD(Part%d,Sig%g)", + Hd->PartitionNumber, + (EFI_GUID *) &(Hd->Signature[0]) + ); + break; + default: + CatPrint(Str, L"HD(Part%d,MBRType=%02x,SigType=%02x)", + Hd->PartitionNumber, + Hd->MBRType, + Hd->SignatureType + ); + break; + } +} + +VOID +_DevPathCDROM ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + CDROM_DEVICE_PATH *Cd; + + Cd = DevPath; + CatPrint(Str, L"CDROM(Entry%x)", Cd->BootEntry); +} + +VOID +_DevPathFilePath ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + FILEPATH_DEVICE_PATH *Fp; + + Fp = DevPath; + CatPrint(Str, L"%s", Fp->PathName); +} + +VOID +_DevPathMediaProtocol ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + MEDIA_PROTOCOL_DEVICE_PATH *MediaProt; + + MediaProt = DevPath; + CatPrint(Str, L"%g", &MediaProt->Protocol); +} + +VOID +_DevPathBssBss ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + BBS_BBS_DEVICE_PATH *Bss; + CHAR16 *Type; + + Bss = DevPath; + switch (Bss->DeviceType) { + case BBS_TYPE_FLOPPY: Type = L"Floppy"; break; + case BBS_TYPE_HARDDRIVE: Type = L"Harddrive"; break; + case BBS_TYPE_CDROM: Type = L"CDROM"; break; + case BBS_TYPE_PCMCIA: Type = L"PCMCIA"; break; + case BBS_TYPE_USB: Type = L"Usb"; break; + case BBS_TYPE_EMBEDDED_NETWORK: Type = L"Net"; break; + default: Type = L"?"; break; + } + + CatPrint(Str, L"Bss-%s(%a)", Type, Bss->String); +} + + +VOID +_DevPathEndInstance ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + CatPrint(Str, L","); +} + +VOID +_DevPathNodeUnknown ( + IN OUT POOL_PRINT *Str, + IN VOID *DevPath + ) +{ + CatPrint(Str, L"?"); +} + + +struct { + UINT8 Type; + UINT8 SubType; + VOID (*Function)(POOL_PRINT *, VOID *); +} DevPathTable[] = { + { HARDWARE_DEVICE_PATH, HW_PCI_DP, _DevPathPci}, + { HARDWARE_DEVICE_PATH, HW_PCCARD_DP, _DevPathPccard}, + { HARDWARE_DEVICE_PATH, HW_MEMMAP_DP, _DevPathMemMap}, + { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, _DevPathVendor}, + { HARDWARE_DEVICE_PATH, HW_CONTROLLER_DP, _DevPathController}, + { ACPI_DEVICE_PATH, ACPI_DP, _DevPathAcpi}, + { MESSAGING_DEVICE_PATH, MSG_ATAPI_DP, _DevPathAtapi}, + { MESSAGING_DEVICE_PATH, MSG_SCSI_DP, _DevPathScsi}, + { MESSAGING_DEVICE_PATH, MSG_FIBRECHANNEL_DP, _DevPathFibre}, + { MESSAGING_DEVICE_PATH, MSG_1394_DP, _DevPath1394}, + { MESSAGING_DEVICE_PATH, MSG_USB_DP, _DevPathUsb}, + { MESSAGING_DEVICE_PATH, MSG_I2O_DP, _DevPathI2O}, + { MESSAGING_DEVICE_PATH, MSG_MAC_ADDR_DP, _DevPathMacAddr}, + { MESSAGING_DEVICE_PATH, MSG_IPv4_DP, _DevPathIPv4}, + { MESSAGING_DEVICE_PATH, MSG_IPv6_DP, _DevPathIPv6}, + { MESSAGING_DEVICE_PATH, MSG_INFINIBAND_DP, _DevPathInfiniBand}, + { MESSAGING_DEVICE_PATH, MSG_UART_DP, _DevPathUart}, + { MESSAGING_DEVICE_PATH, MSG_VENDOR_DP, _DevPathVendor}, + { MEDIA_DEVICE_PATH, MEDIA_HARDDRIVE_DP, _DevPathHardDrive}, + { MEDIA_DEVICE_PATH, MEDIA_CDROM_DP, _DevPathCDROM}, + { MEDIA_DEVICE_PATH, MEDIA_VENDOR_DP, _DevPathVendor}, + { MEDIA_DEVICE_PATH, MEDIA_FILEPATH_DP, _DevPathFilePath}, + { MEDIA_DEVICE_PATH, MEDIA_PROTOCOL_DP, _DevPathMediaProtocol}, + { BBS_DEVICE_PATH, BBS_BBS_DP, _DevPathBssBss}, + { END_DEVICE_PATH_TYPE, END_INSTANCE_DEVICE_PATH_SUBTYPE, _DevPathEndInstance}, + { 0, 0, NULL} +}; + + +CHAR16 * +DevicePathToStr ( + EFI_DEVICE_PATH *DevPath + ) +/*++ + + Turns the Device Path into a printable string. Allcoates + the string from pool. The caller must FreePool the returned + string. + +--*/ +{ + POOL_PRINT Str; + EFI_DEVICE_PATH *DevPathNode; + VOID (*DumpNode)(POOL_PRINT *, VOID *); + UINTN Index, NewSize; + + ZeroMem(&Str, sizeof(Str)); + + // + // Unpacked the device path + // + + DevPath = UnpackDevicePath(DevPath); + ASSERT (DevPath); + + + // + // Process each device path node + // + + DevPathNode = DevPath; + while (!IsDevicePathEnd(DevPathNode)) { + // + // Find the handler to dump this device path node + // + + DumpNode = NULL; + for (Index = 0; DevPathTable[Index].Function; Index += 1) { + + if (DevicePathType(DevPathNode) == DevPathTable[Index].Type && + DevicePathSubType(DevPathNode) == DevPathTable[Index].SubType) { + DumpNode = DevPathTable[Index].Function; + break; + } + } + + // + // If not found, use a generic function + // + + if (!DumpNode) { + DumpNode = _DevPathNodeUnknown; + } + + // + // Put a path seperator in if needed + // + + if (Str.len && DumpNode != _DevPathEndInstance) { + CatPrint (&Str, L"/"); + } + + // + // Print this node of the device path + // + + DumpNode (&Str, DevPathNode); + + // + // Next device path node + // + + DevPathNode = NextDevicePathNode(DevPathNode); + } + + // + // Shrink pool used for string allocation + // + + FreePool (DevPath); + NewSize = (Str.len + 1) * sizeof(CHAR16); + Str.str = ReallocatePool (Str.str, NewSize, NewSize); + Str.str[Str.len] = 0; + return Str.str; +} + +BOOLEAN +LibMatchDevicePaths ( + IN EFI_DEVICE_PATH *Multi, + IN EFI_DEVICE_PATH *Single + ) +{ + EFI_DEVICE_PATH *DevicePath, *DevicePathInst; + UINTN Size; + + if (!Multi || !Single) { + return FALSE; + } + + DevicePath = Multi; + while ((DevicePathInst = DevicePathInstance (&DevicePath, &Size))) { + if (CompareMem (Single, DevicePathInst, Size) == 0) { + return TRUE; + } + } + return FALSE; +} + +EFI_DEVICE_PATH * +LibDuplicateDevicePathInstance ( + IN EFI_DEVICE_PATH *DevPath + ) +{ + EFI_DEVICE_PATH *NewDevPath,*DevicePathInst,*Temp; + UINTN Size = 0; + + // + // get the size of an instance from the input + // + + Temp = DevPath; + DevicePathInst = DevicePathInstance (&Temp, &Size); + + // + // Make a copy and set proper end type + // + NewDevPath = NULL; + if (Size) { + NewDevPath = AllocatePool (Size + sizeof(EFI_DEVICE_PATH)); + } + + if (NewDevPath) { + CopyMem (NewDevPath, DevicePathInst, Size); + Temp = NextDevicePathNode(NewDevPath); + SetDevicePathEndNode(Temp); + } + + return NewDevPath; +} + |