/** @file The TPM2 definition block in ACPI table for TCG2 physical presence and MemoryClear. Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
(c)Copyright 2016 HP Development Company, L.P.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/ DefinitionBlock ( "Tpm.aml", "SSDT", 2, "INTEL ", "Tpm2Tabl", 0x1000 ) { Scope (\_SB) { Device (TPM) { // // TCG2 // Name (_HID, "NNN0000") // // Reserve 1 more byte for ACPI HID // Noop Name (_CID, "MSFT0101") // // Readable name of this device, don't know if this way is correct yet // Name (_STR, Unicode ("TPM 2.0 Device")) // // Return the resource consumed by TPM device // Name (_CRS, ResourceTemplate () { Memory32Fixed (ReadWrite, 0xfed40000, 0x5000) }) // // Operational region for Smi port access // OperationRegion (SMIP, SystemIO, 0xB2, 1) Field (SMIP, ByteAcc, NoLock, Preserve) { IOB2, 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 paramter PPRP, 32, // Physical Presence request operation response PPRQ, 32, // Physical Presence request operation PPRM, 32, // Physical Presence request operation parameter 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 paramter MORD, 32, // Memory Overwrite Request Data MRET, 32, // Memory Overwrite function return code UCRQ, 32 // Phyical 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))) { // // Triggle the SMI through ACPI _PTS method. // Store (0x02, MCIP) // // Triggle the SMI interrupt // Store (MCIN, IOB2) } } Return (0) } Method (_STA, 0) { if (LEqual (ACC0, 0xff)) { Return (0) } Return (0x0f) } // // TCG Hardware Information // Method (HINF, 3, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj { // // Switch by function index // Switch (ToInteger(Arg1)) { Case (0) { // // Standard query // Return (Buffer () {0x03}) } Case (1) { // // Return failure if no TPM present // Name(TPMV, Package () {0x01, Package () {0x2, 0x0}}) 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, 3, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj { // // Switch by function index // Switch (ToInteger(Arg1)) { Case (0) { // // Standard query, supports function 1-8 // Return (Buffer () {0xFF, 0x01}) } Case (1) { // // a) Get Physical Presence Interface Version // Return ("$PV") } Case (2) { // // b) Submit TPM Operation Request to Pre-OS Environment // Store (DerefOf (Index (Arg2, 0x00)), PPRQ) Store (0, PPRM) Store (0x02, PPIP) // // Triggle the SMI interrupt // Store (PPIN, IOB2) 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) // // Triggle the SMI interrupt // Store (PPIN, IOB2) 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 (Arg2, 0x00)), PPRQ) Store (0, PPRM) If (LEqual (PPRQ, 23)) { Store (DerefOf (Index (Arg2, 0x01)), PPRM) } // // Triggle the SMI interrupt // Store (PPIN, IOB2) Return (FRET) } Case (8) { // // e) Get User Confirmation Status for Operation // Store (8, PPIP) Store (DerefOf (Index (Arg2, 0x00)), UCRQ) // // Triggle the SMI interrupt // Store (PPIN, IOB2) Return (FRET) } Default {BreakPoint} } Return (1) } Method (TMCI, 3, Serialized, 0, IntObj, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj { // // Switch by function index // Switch (ToInteger (Arg1)) { 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 (Arg2, 0x00)), MORD) // // Triggle the SMI through ACPI _DSM method. // Store (0x01, MCIP) // // Triggle the SMI interrupt // Store (MCIN, IOB2) 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 (Arg1, Arg2, Arg3)) } // // TCG Physical Presence Interface // If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653"))) { Return (TPPI (Arg1, Arg2, Arg3)) } // // TCG Memory Clear Interface // If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d"))) { Return (TMCI (Arg1, Arg2, Arg3)) } Return (Buffer () {0}) } } } }