| /** @file | |
| The TPM definition block in ACPI table for physical presence | |
| and MemoryClear. | |
| Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR> | |
| Copyright (c) Microsoft Corporation.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| DefinitionBlock ( | |
| "Tpm.aml", | |
| "SSDT", | |
| 2, | |
| "INTEL ", | |
| "TcgTable", | |
| 0x1000 | |
| ) | |
| { | |
| Scope (\_SB) | |
| { | |
| Device (TPM) | |
| { | |
| // | |
| // Define _HID, "PNP0C31" is defined in | |
| // "Secure Startup-FVE and TPM Admin BIOS and Platform Requirements" | |
| // | |
| Name (_HID, EISAID ("PNP0C31")) | |
| // | |
| // Readable name of this device, don't know if this way is correct yet | |
| // | |
| Name (_STR, Unicode ("TPM 1.2 Device")) | |
| // | |
| // Return the resource consumed by TPM device | |
| // | |
| Name (_CRS, ResourceTemplate () { | |
| Memory32Fixed (ReadWrite, 0xfed40000, 0x5000) | |
| }) | |
| // | |
| // Operational region for Smi port access | |
| // | |
| OperationRegion (SMIP, SystemIO, FixedPcdGet16 (PcdSmiCommandIoPort), 1) | |
| Field (SMIP, ByteAcc, NoLock, Preserve) | |
| { | |
| IOPN, 8 | |
| } | |
| // | |
| // Operational region for TPM access | |
| // | |
| OperationRegion (TPMR, SystemMemory, 0xfed40000, 0x5000) | |
| Field (TPMR, AnyAcc, NoLock, Preserve) | |
| { | |
| ACC0, 8, | |
| } | |
| // | |
| // Operational region for TPM support, TPM Physical Presence and TPM Memory Clear | |
| // Region Offset 0xFFFF0000 and Length 0xF0 will be fixed in C code. | |
| // | |
| OperationRegion (TNVS, SystemMemory, 0xFFFF0000, 0xF0) | |
| Field (TNVS, AnyAcc, NoLock, Preserve) | |
| { | |
| PPIN, 8, // Software SMI for Physical Presence Interface | |
| PPIP, 32, // Used for save physical presence parameter | |
| PPRP, 32, // Physical Presence request operation response | |
| PPRQ, 32, // Physical Presence request operation | |
| LPPR, 32, // Last Physical Presence request operation | |
| FRET, 32, // Physical Presence function return code | |
| MCIN, 8, // Software SMI for Memory Clear Interface | |
| MCIP, 32, // Used for save the Mor parameter | |
| MORD, 32, // Memory Overwrite Request Data | |
| MRET, 32, // Memory Overwrite function return code | |
| UCRQ, 32 // Physical Presence request operation to Get User Confirmation Status | |
| } | |
| Method (PTS, 1, Serialized) | |
| { | |
| // | |
| // Detect Sx state for MOR, only S4, S5 need to handle | |
| // | |
| If (LAnd (LLess (Arg0, 6), LGreater (Arg0, 3))) | |
| { | |
| // | |
| // Bit4 -- DisableAutoDetect. 0 -- Firmware MAY autodetect. | |
| // | |
| If (LNot (And (MORD, 0x10))) | |
| { | |
| // | |
| // Trigger the SMI through ACPI _PTS method. | |
| // | |
| Store (0x02, MCIP) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (MCIN, IOPN) | |
| } | |
| } | |
| Return (0) | |
| } | |
| Method (_STA, 0) | |
| { | |
| if (LEqual (ACC0, 0xff)) | |
| { | |
| Return (0) | |
| } | |
| Return (0x0f) | |
| } | |
| // | |
| // TCG Hardware Information | |
| // | |
| Method (HINF, 1, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj}) // IntObj | |
| { | |
| // | |
| // Switch by function index | |
| // | |
| Switch (ToInteger(Arg0)) | |
| { | |
| Case (0) | |
| { | |
| // | |
| // Standard query | |
| // | |
| Return (Buffer () {0x03}) | |
| } | |
| Case (1) | |
| { | |
| // | |
| // Return failure if no TPM present | |
| // | |
| Name(TPMV, Package () {0x01, Package () {0x1, 0x20}}) | |
| if (LEqual (_STA (), 0x00)) | |
| { | |
| Return (Package () {0x00}) | |
| } | |
| // | |
| // Return TPM version | |
| // | |
| Return (TPMV) | |
| } | |
| Default {BreakPoint} | |
| } | |
| Return (Buffer () {0}) | |
| } | |
| Name(TPM2, Package (0x02){ | |
| Zero, | |
| Zero | |
| }) | |
| Name(TPM3, Package (0x03){ | |
| Zero, | |
| Zero, | |
| Zero | |
| }) | |
| // | |
| // TCG Physical Presence Interface | |
| // | |
| Method (TPPI, 2, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj}) // IntObj, PkgObj | |
| { | |
| // | |
| // Switch by function index | |
| // | |
| Switch (ToInteger(Arg0)) | |
| { | |
| Case (0) | |
| { | |
| // | |
| // Standard query, supports function 1-8 | |
| // | |
| Return (Buffer () {0xFF, 0x01}) | |
| } | |
| Case (1) | |
| { | |
| // | |
| // a) Get Physical Presence Interface Version | |
| // | |
| Return ("1.2") | |
| } | |
| Case (2) | |
| { | |
| // | |
| // b) Submit TPM Operation Request to Pre-OS Environment | |
| // | |
| Store (DerefOf (Index (Arg1, 0x00)), PPRQ) | |
| Store (0x02, PPIP) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (PPIN, IOPN) | |
| Return (FRET) | |
| } | |
| Case (3) | |
| { | |
| // | |
| // c) Get Pending TPM Operation Requested By the OS | |
| // | |
| Store (PPRQ, Index (TPM2, 0x01)) | |
| Return (TPM2) | |
| } | |
| Case (4) | |
| { | |
| // | |
| // d) Get Platform-Specific Action to Transition to Pre-OS Environment | |
| // | |
| Return (2) | |
| } | |
| Case (5) | |
| { | |
| // | |
| // e) Return TPM Operation Response to OS Environment | |
| // | |
| Store (0x05, PPIP) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (PPIN, IOPN) | |
| Store (LPPR, Index (TPM3, 0x01)) | |
| Store (PPRP, Index (TPM3, 0x02)) | |
| Return (TPM3) | |
| } | |
| Case (6) | |
| { | |
| // | |
| // f) Submit preferred user language (Not implemented) | |
| // | |
| Return (3) | |
| } | |
| Case (7) | |
| { | |
| // | |
| // g) Submit TPM Operation Request to Pre-OS Environment 2 | |
| // | |
| Store (7, PPIP) | |
| Store (DerefOf (Index (Arg1, 0x00)), PPRQ) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (PPIN, IOPN) | |
| Return (FRET) | |
| } | |
| Case (8) | |
| { | |
| // | |
| // e) Get User Confirmation Status for Operation | |
| // | |
| Store (8, PPIP) | |
| Store (DerefOf (Index (Arg1, 0x00)), UCRQ) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (PPIN, IOPN) | |
| Return (FRET) | |
| } | |
| Default {BreakPoint} | |
| } | |
| Return (1) | |
| } | |
| Method (TMCI, 2, Serialized, 0, IntObj, {UnknownObj, UnknownObj}) // IntObj, PkgObj | |
| { | |
| // | |
| // Switch by function index | |
| // | |
| Switch (ToInteger (Arg0)) | |
| { | |
| Case (0) | |
| { | |
| // | |
| // Standard query, supports function 1-1 | |
| // | |
| Return (Buffer () {0x03}) | |
| } | |
| Case (1) | |
| { | |
| // | |
| // Save the Operation Value of the Request to MORD (reserved memory) | |
| // | |
| Store (DerefOf (Index (Arg1, 0x00)), MORD) | |
| // | |
| // Trigger the SMI through ACPI _DSM method. | |
| // | |
| Store (0x01, MCIP) | |
| // | |
| // Trigger the SMI interrupt | |
| // | |
| Store (MCIN, IOPN) | |
| Return (MRET) | |
| } | |
| Default {BreakPoint} | |
| } | |
| Return (1) | |
| } | |
| Method (_DSM, 4, Serialized, 0, UnknownObj, {BuffObj, IntObj, IntObj, PkgObj}) | |
| { | |
| // | |
| // TCG Hardware Information | |
| // | |
| If(LEqual(Arg0, ToUUID ("cf8e16a5-c1e8-4e25-b712-4f54a96702c8"))) | |
| { | |
| Return (HINF (Arg2)) | |
| } | |
| // | |
| // TCG Physical Presence Interface | |
| // | |
| If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653"))) | |
| { | |
| Return (TPPI (Arg2, Arg3)) | |
| } | |
| // | |
| // TCG Memory Clear Interface | |
| // | |
| If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d"))) | |
| { | |
| Return (TMCI (Arg2, Arg3)) | |
| } | |
| Return (Buffer () {0}) | |
| } | |
| } | |
| } | |
| } |