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TCMDXE
Function Table
| Address | Name | Description |
|---|---|---|
| TcmReportError | ||
| TcmAssertFail | ||
| TcmReadUnaligned64 | ||
| TcmPciExpressGetAddr | ||
| TcmIoWriteEnable | ||
| TcmRegisterWrite | ||
| TcmReadWord | ||
| TcmCheckResponse | ||
| TcmMicroDelay | ||
| TcmFifoTransmit | ||
| TcmStartup | ||
| TcmContinueSelfTest | ||
| TcmPhysicalEnable | ||
| TcmPhysicalDisable | ||
| TcmPhysicalSetDeactivated | ||
| TcmForceClear | ||
| TcmGetFlags | ||
| TcmDxeEntryPoint | ||
| Global | data | |
| EFI_HANDLE | gImageHandle = NULL; | |
| TCM | callback GUID from .rdata section | |
| extern | EFI_GUID gTcpaCallbackGuid; // {0x6B221186, 0x7E6F, 0x4A71, ...} @ 0x18D0 | |
| TCM | vendor/device ID signature | |
| TCM | FIFO interface constants | |
| TPM_STANY | response tag | |
| Debug | print wrappers | |
| Check | CMOS register 0x4B for debug level | |
| IoWrite8 | **(0x70, (IoRead8 (0x70) & 0x80) | 0x4B);** |
| EFI_D_INFO | equivalent | |
| UEFI | Library context init | |
| HOB | list not found - assert | |
| TcmReportError | ( | |
| PCI | Express / MMIO helpers | |
| 0x0500 | - enable decode | |
| TCM | FIFO I/O primitives | |
| Microsecond | delay via RDTSC | |
| Check | EFLAGS.IF before disabling interrupts | |
| InterruptsEnabled | = (AsmReadEflags () & 0x200) != 0; | |
| Disable | interrupts during the calibrated delay loop | |
| AsmDisableInterrupts | (); | |
| TCM | FIFO command transmit/receive | |
| Check | TCM presence: DID_VID must not be 0xFF | |
| if | (MmioRead8 (TcmAddr + TCM_FIFO_REG_DID_VID) == 0xFF) { | |
| Acquire | locality: write active locality request | |
| if | (MmioRead8 (TcmAddr + TCM_FIFO_REG_ACCESS) == 0xFF) { | |
| Wait | for locality to be granted: Access register < 0xFF | |
| Status | = TcmRegisterWrite ( | |
| Prepare | for command: set STS.commandReady | |
| MmioWrite8 | (TcmAddr + TCM_FIFO_REG_STS, TCM_STS_CMD_READY); | |
| STS | reg relative | |
| Write | command bytes to FIFO | |
| Index | = 0; | |
| Wait | for STS_EXPECT to be set | |
| Check | burst count before writing | |
| May | be unused depending on TCM model | |
| Write | data byte to FIFO | |
| ByteVal | = SendBuffer[Index]; | |
| Signal | end of data | |
| Trigger | command execution: write GO bit | |
| MmioWrite8 | (TcmAddr + TCM_FIFO_REG_STS, TCM_STS_GO); | |
| Wait | for data available | |
| Read | response data | |
| Read | status word to get FIFO byte count | |
| TcmReadWord | (Locality, &FifoWord); | |
| Buffer | too small | |
| Read | remaining bytes | |
| while | (FifoWord > 0) { | |
| Check | whether we have the full response header | |
| if | (RecvIdx >= 6) { | |
| Locality | release: clear access register | |
| MmioWrite8 | (TcmAddr + TCM_FIFO_REG_ACCESS, 0x20); | |
| Strip | header: response is at offset 10 from raw data | |
| DataSize | = RecvIdx - 10; | |
| Return | success / status | |
| return | TcmCheckResponse ((UINT16 *)RecvBuffer); | |
| TCM | command wrappers | |
| reuse | buffer for response | |
| After | physical enable, set deactivated flag to FALSE | |
| Status | = TcmPhysicalSetDeactivated (FALSE); | |
| First | set deactivated flag to TRUE, then physical disable | |
| Status | = TcmPhysicalSetDeactivated (TRUE); | |
| Get | volatile flags via sub-capability 273 | |
| Ordinal | = 273; | |
| UEFI | Driver Entry Point | |
| Must | have ImageHandle | |
| if | (ImageHandle == NULL) { | |
| Must | have SystemTable | |
| if | (SystemTable == NULL) { | |
| Must | have BootServices | |
| if | (gBootServices == NULL) { | |
| Must | have RuntimeServices | |
| if | (gRuntimeServices == NULL) { | |
| Initialize | HOB list | |
| Initialize | PCI Express MMIO base address | |
| gPciExpressBaseAddress | = ((UINT64 (*)(UINTN))TcmGetPcdDb ()->GetPcd ())(5); | |
| If | PCI Express decoding is enabled, write the decode enable register | |
| if | ((INT8)TcmPciExpressGetAddr (1024068) >= 0) { | |
| Check | for TCM presence via signature word at DID_VID register | |
| TcmSignature | = AsmReadEflags (); | |
| Disable | interrupts, check TCM signature | |
| If | TCM signature matches, register callback | |
| if | (MmioRead16 (TCM_BASE_ADDRESS + TCM_FIFO_REG_DID_VID) == TCM_SIGNATURE_WORD) { | |
| Calibrated | delay to ensure TCM is ready | |
| TcmMicroDelay | (1288); | |
| Wait | for TCM ready... | |
| while | ((((UINT32)TcmSignature + 357 - (UINT32)IoRead32 (1288)) & 0x800000) == 0) { | |
| Consume | remaining RDTSC delta | |
| TCM | found - register the TCG callback | |
| AsmReadTsc | (); // Flush | |
| Register | callback for TCG physical presence protocol | |
| Status | = gBootServices->RegisterProtocolNotify ( | |
| Callback | function |
Generated by HR650X BIOS Decompilation Project