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Tpm20Acpi
Function Table
| Address | Name | Description |
|---|---|---|
| ReadUnaligned64 | ||
| IsHobGuidEqual | ||
| IoWrite16 | ||
| IoRead32 | ||
| ReadTimestampCounter | ||
| ReadCallerEflags | ||
| CpuPause | ||
| EnableInterrupts | ||
| DisableInterrupts | ||
| InitializeAcpiSupport | ||
| GetHobList | ||
| AssertHandler | ||
| DebugPrint | ||
| InitializeUefiBootServicesTable | ||
| PcdGet32 | ||
| PcdSet32 | ||
| AsciiStrLen | ||
| LibGetDsdt | ||
| AcpiAmlWriteInteger | ||
| IsTpmHwPresent | ||
| GetTpmInterfaceType | ||
| IsTpmAvailable | ||
| PciExpressRead | ||
| Tpm20AcpiInitEntry | ||
| ModuleEntryPoint | ||
| Global | variables - UEFI boot/runtime services | |
| EFI_HANDLE | gImageHandle = NULL; | |
| Module | global variables | |
| UINT64 | mHobList = 0; ///< HOB list pointer (cached) | |
| Static | (internal) function prototypes | |
| UEFI | Boot Services Table Library initialization | |
| Memory | Operations | |
| Overlapping | with Source before Destination: copy backwards | |
| CopyMemBackwards | (Dst, Source, Length); | |
| LengthRemaining | = Length; | |
| Unaligned | and string operations | |
| ACPI | PM1a_CNT.SLP_TYPx + SLP_EN | |
| Protocol | locator helpers | |
| Allocate | 5 pages for ACPI tables | |
| HOB | list management | |
| End | of HOB list | |
| return | NULL; | |
| Assert | and Debug | |
| Read | CMOS index 0x4B to determine debug routing | |
| CmosIndex | = __inbyte (0x70); | |
| DSDT | Locator | |
| Check | cache first | |
| if | (mDsdtAddr != 0 && mXsdtDsdtAddr != 0) { | |
| Locate | ACPI Support protocol | |
| AcpiSupport | = GetAcpiSupportProtocol (); | |
| Get | the RSDT/XSDT table | |
| TableIndex | = 0; | |
| Check | for RSDT (1.0b) or XSDT (2.0+) | |
| if | ((UINT32 )Table == EFI_ACPI_RSDT_SIGNATURE) { | |
| RSDT | found - search for DSDT pointer | |
| NumberOfTableEntries | = ((UINT32 )((UINT8 *)Table + 4) - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof (UINT32); | |
| NumberOfTableEntries | = ((UINT32 )((UINT8 *)Table + 4) - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof (UINT64); | |
| Report | if we couldn't find DSDT | |
| if | (mDsdtAddr == 0 && mXsdtDsdtAddr == 0) { | |
| ACPI | AML Write Helper | |
| Search | for the signature in the DSDT | |
| for | (Offset = FoundOffset; Offset < DsdtSize; Offset += 4) { | |
| Check | the AML NameString prefix before the signature | |
| BytePtr | = (UINT8 *)(DsdtBase + FoundOffset - 1); | |
| Skip | past this match and search again | |
| DsdtSize | -= FoundOffset + 4; | |
| Write | the value based on the AML opcode after the signature | |
| switch | (*(BytePtr + 4)) { | |
| Replace | ZeroOp/OneOp with the value | |
| if | (Value > 1) { | |
| TPM | Hardware Detection | |
| PCI | Express MMIO access | |
| Main | TPM ACPI Initialization | |
| Locate | DSDT | |
| Status | = LibGetDsdt (&DsdtAddr); | |
| Initialize | ACPI tables | |
| InitializeAcpiSupport | (); | |
| Detect | TPM hardware availability | |
| if | (!IsTpmAvailable ()) { | |
| No | TPM: set defaults | |
| No | TPM | |
| Write | no-TPM configuration to DSDT | |
| Status | = AcpiAmlWriteInteger (DsdtAddr, MAX_UINT32, SIGNATURE_AMDT, 0); | |
| Write | "TPMM" with default stolen address (no TPM) | |
| Status | = AcpiAmlWriteInteger (DsdtAddr, MAX_UINT32, SIGNATURE_TPMM, 0xFED00000); | |
| TPM | is available - write TPMF=1 | |
| Status | = AcpiAmlWriteInteger (DsdtAddr, MAX_UINT32, SIGNATURE_TPMF, 1); | |
| Check | if TPM has active interface | |
| if | (MEMORY[TPM_REG_BASE + TPM_CTRL_AREA_OFFSET] == 0xFFFFFFFF) { | |
| TPM | with no active interface (TPP mode) | |
| mTpmMode | = 7; | |
| Dump | CtrlAreaMap registers | |
| DEBUG | ((DEBUG_INFO, "CtrlAreaMap->Error = %x \n", MEMORY[TPM_REG_BASE + TPM_CTRL_ERROR])); | |
| Program | "DTPT" with 1 | |
| Status | = AcpiAmlWriteInteger (DsdtAddr, MAX_UINT32, SIGNATURE_DTPT, 1); | |
| TPM | with active interface - find stolen address from HOB | |
| HobPtr | = GetHobList (); | |
| Determine | stolen address | |
| StolenAddr | = STOLEN_ADDR_DEFAULT; | |
| TPM2 | with DMA | |
| Zero | the stolen memory region if it's not the default location | |
| if | (StolenAddr != STOLEN_ADDR_DEFAULT) { | |
| Set | up TPM control area in stolen memory | |
| Response | (UINT32 )(StolenAddr + 36) = 0; // ResponseSize | |
| Command | buffer | |
| Program | "DTPT" with 0 | |
| Status | = AcpiAmlWriteInteger (DsdtAddr, MAX_UINT32, SIGNATURE_DTPT, 0); | |
| Install | TPM2 ACPI table | |
| if | (mTpmMode == 2) { | |
| Allocate | and populate TPM2 table | |
| Status | = gBS->AllocatePool (EfiBootServicesData, 56, &BufferPtr); | |
| Copy | "TPM24" signature header (52 bytes) | |
| CopyMem | (BufferPtr, "TPM24", 52); | |
| Install | via ACPI table protocol | |
| Status | = ((EFI_ACPI_TABLE_PROTOCOL *)DsdtInterface)->InstallAcpiTable ( | |
| Direct | install of TPM24 signature | |
| Signal | that initialization is complete | |
| Status | = gBS->SignalEvent ((EFI_EVENT)a1); | |
| Module | Entry Point | |
| Initialize | UEFI Boot/Runtime Services Table | |
| InitializeUefiBootServicesTable | (ImageHandle, SystemTable); | |
| Initialize | PCD database via LocateProtocol | |
| mPcdDb | = (UINT64)PcdGet32 (5); | |
| Detect | TPM hardware via EFLAGS.IF check | |
| if | (ReadCallerEflags () & 0x200) { | |
| Timeout | loop using TSC | |
| while | (((IoRead32 (1288) + 357 - IoRead32 (1288)) & 0x800000) == 0) { | |
| Register | the initialization event via CreateEvent | |
| return | gBS->CreateEvent ( |
Generated by HR650X BIOS Decompilation Project