2 The TPM2 definition block in ACPI table for TCG2 physical presence
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6 (c)Copyright 2016 HP Development Company, L.P.<BR>
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33 Name (_HID, "MSFT0101")
36 // Readable name of this device, don't know if this way is correct yet
38 Name (_STR, Unicode ("TPM 2.0 Device"))
41 // Return the resource consumed by TPM device
43 Name (_CRS, ResourceTemplate () {
44 Memory32Fixed (ReadWrite, 0xfed40000, 0x5000)
48 // Operational region for Smi port access
50 OperationRegion (SMIP, SystemIO, 0xB2, 1)
51 Field (SMIP, ByteAcc, NoLock, Preserve)
57 // Operational region for TPM access
59 OperationRegion (TPMR, SystemMemory, 0xfed40000, 0x5000)
60 Field (TPMR, AnyAcc, NoLock, Preserve)
66 // Operational region for TPM support, TPM Physical Presence and TPM Memory Clear
67 // Region Offset 0xFFFF0000 and Length 0xF0 will be fixed in C code.
69 OperationRegion (TNVS, SystemMemory, 0xFFFF0000, 0xF0)
70 Field (TNVS, AnyAcc, NoLock, Preserve)
72 PPIN, 8, // Software SMI for Physical Presence Interface
73 PPIP, 32, // Used for save physical presence paramter
74 PPRP, 32, // Physical Presence request operation response
75 PPRQ, 32, // Physical Presence request operation
76 PPRM, 32, // Physical Presence request operation parameter
77 LPPR, 32, // Last Physical Presence request operation
78 FRET, 32, // Physical Presence function return code
79 MCIN, 8, // Software SMI for Memory Clear Interface
80 MCIP, 32, // Used for save the Mor paramter
81 MORD, 32, // Memory Overwrite Request Data
82 MRET, 32 // Memory Overwrite function return code
85 Method (PTS, 1, Serialized)
88 // Detect Sx state for MOR, only S4, S5 need to handle
90 If (LAnd (LLess (Arg0, 6), LGreater (Arg0, 3)))
93 // Bit4 -- DisableAutoDetect. 0 -- Firmware MAY autodetect.
95 If (LNot (And (MORD, 0x10)))
98 // Triggle the SMI through ACPI _PTS method.
103 // Triggle the SMI interrupt
113 if (LEqual (ACC0, 0xff))
121 // TCG Hardware Information
123 Method (HINF, 3, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
126 // Switch by function index
128 Switch (ToInteger(Arg1))
135 Return (Buffer () {0x03})
140 // Return failure if no TPM present
142 Name(TPMV, Package () {0x01, Package () {0x2, 0x0}})
143 if (LEqual (_STA (), 0x00))
145 Return (Package () {0x00})
149 // Return TPM version
155 Return (Buffer () {0})
158 Name(TPM2, Package (0x02){
163 Name(TPM3, Package (0x03){
170 // TCG Physical Presence Interface
172 Method (TPPI, 3, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
175 // Switch by function index
177 Switch (ToInteger(Arg1))
182 // Standard query, supports function 1-8
184 Return (Buffer () {0xFF, 0x01})
189 // a) Get Physical Presence Interface Version
196 // b) Submit TPM Operation Request to Pre-OS Environment
199 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
203 // Triggle the SMI interrupt
213 // c) Get Pending TPM Operation Requested By the OS
216 Store (PPRQ, Index (TPM2, 0x01))
222 // d) Get Platform-Specific Action to Transition to Pre-OS Environment
229 // e) Return TPM Operation Response to OS Environment
234 // Triggle the SMI interrupt
238 Store (LPPR, Index (TPM3, 0x01))
239 Store (PPRP, Index (TPM3, 0x02))
247 // f) Submit preferred user language (Not implemented)
256 // g) Submit TPM Operation Request to Pre-OS Environment 2
259 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
261 If (LEqual (PPRQ, 23)) {
262 Store (DerefOf (Index (Arg2, 0x01)), PPRM)
266 // Triggle the SMI interrupt
274 // e) Get User Confirmation Status for Operation
277 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
280 // Triggle the SMI interrupt
292 Method (TMCI, 3, Serialized, 0, IntObj, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
295 // Switch by function index
297 Switch (ToInteger (Arg1))
302 // Standard query, supports function 1-1
304 Return (Buffer () {0x03})
309 // Save the Operation Value of the Request to MORD (reserved memory)
311 Store (DerefOf (Index (Arg2, 0x00)), MORD)
314 // Triggle the SMI through ACPI _DSM method.
319 // Triggle the SMI interrupt
329 Method (_DSM, 4, Serialized, 0, UnknownObj, {BuffObj, IntObj, IntObj, PkgObj})
333 // TCG Hardware Information
335 If(LEqual(Arg0, ToUUID ("cf8e16a5-c1e8-4e25-b712-4f54a96702c8")))
337 Return (HINF (Arg1, Arg2, Arg3))
341 // TCG Physical Presence Interface
343 If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653")))
345 Return (TPPI (Arg1, Arg2, Arg3))
349 // TCG Memory Clear Interface
351 If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d")))
353 Return (TMCI (Arg1, Arg2, Arg3))
356 Return (Buffer () {0})