2 The TPM2 definition block in ACPI table for TrEE physical presence
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32 Name (_HID, "MSFT0101")
35 // Readable name of this device, don't know if this way is correct yet
37 Name (_STR, Unicode ("TPM 2.0 Device"))
40 // Return the resource consumed by TPM device
42 Name (_CRS, ResourceTemplate () {
43 Memory32Fixed (ReadWrite, 0xfed40000, 0x5000)
47 // Operational region for Smi port access
49 OperationRegion (SMIP, SystemIO, 0xB2, 1)
50 Field (SMIP, ByteAcc, NoLock, Preserve)
56 // Operational region for TPM access
58 OperationRegion (TPMR, SystemMemory, 0xfed40000, 0x5000)
59 Field (TPMR, AnyAcc, NoLock, Preserve)
65 // Operational region for TPM support, TPM Physical Presence and TPM Memory Clear
66 // Region Offset 0xFFFF0000 and Length 0xF0 will be fixed in C code.
68 OperationRegion (TNVS, SystemMemory, 0xFFFF0000, 0xF0)
69 Field (TNVS, AnyAcc, NoLock, Preserve)
71 PPIN, 8, // Software SMI for Physical Presence Interface
72 PPIP, 32, // Used for save physical presence paramter
73 PPRP, 32, // Physical Presence request operation response
74 PPRQ, 32, // Physical Presence request operation
75 LPPR, 32, // Last Physical Presence request operation
76 FRET, 32, // Physical Presence function return code
77 MCIN, 8, // Software SMI for Memory Clear Interface
78 MCIP, 32, // Used for save the Mor paramter
79 MORD, 32, // Memory Overwrite Request Data
80 MRET, 32 // Memory Overwrite function return code
83 Method (PTS, 1, Serialized)
86 // Detect Sx state for MOR, only S4, S5 need to handle
88 If (LAnd (LLess (Arg0, 6), LGreater (Arg0, 3)))
91 // Bit4 -- DisableAutoDetect. 0 -- Firmware MAY autodetect.
93 If (LNot (And (MORD, 0x10)))
96 // Triggle the SMI through ACPI _PTS method.
101 // Triggle the SMI interrupt
111 if (LEqual (ACC0, 0xff))
119 // TCG Hardware Information
121 Method (HINF, 3, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
124 // Switch by function index
126 Switch (ToInteger(Arg1))
133 Return (Buffer () {0x03})
138 // Return failure if no TPM present
140 Name(TPMV, Package () {0x01, Package () {0x2, 0x0}})
141 if (LEqual (_STA (), 0x00))
143 Return (Package () {0x00})
147 // Return TPM version
153 Return (Buffer () {0})
156 Name(TPM2, Package (0x02){
161 Name(TPM3, Package (0x03){
168 // TCG Physical Presence Interface
170 Method (TPPI, 3, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
173 // Switch by function index
175 Switch (ToInteger(Arg1))
180 // Standard query, supports function 1-8
182 Return (Buffer () {0xFF, 0x01})
187 // a) Get Physical Presence Interface Version
194 // b) Submit TPM Operation Request to Pre-OS Environment
197 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
201 // Triggle the SMI interrupt
211 // c) Get Pending TPM Operation Requested By the OS
214 Store (PPRQ, Index (TPM2, 0x01))
220 // d) Get Platform-Specific Action to Transition to Pre-OS Environment
227 // e) Return TPM Operation Response to OS Environment
232 // Triggle the SMI interrupt
236 Store (LPPR, Index (TPM3, 0x01))
237 Store (PPRP, Index (TPM3, 0x02))
245 // f) Submit preferred user language (Not implemented)
254 // g) Submit TPM Operation Request to Pre-OS Environment 2
257 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
260 // Triggle the SMI interrupt
268 // e) Get User Confirmation Status for Operation
271 Store (DerefOf (Index (Arg2, 0x00)), PPRQ)
274 // Triggle the SMI interrupt
286 Method (TMCI, 3, Serialized, 0, IntObj, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj
289 // Switch by function index
291 Switch (ToInteger (Arg1))
296 // Standard query, supports function 1-1
298 Return (Buffer () {0x03})
303 // Save the Operation Value of the Request to MORD (reserved memory)
305 Store (DerefOf (Index (Arg2, 0x00)), MORD)
308 // Triggle the SMI through ACPI _DSM method.
313 // Triggle the SMI interrupt
323 Method (_DSM, 4, Serialized, 0, UnknownObj, {BuffObj, IntObj, IntObj, PkgObj})
327 // TCG Hardware Information
329 If(LEqual(Arg0, ToUUID ("cf8e16a5-c1e8-4e25-b712-4f54a96702c8")))
331 Return (HINF (Arg1, Arg2, Arg3))
335 // TCG Physical Presence Interface
337 If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653")))
339 Return (TPPI (Arg1, Arg2, Arg3))
343 // TCG Memory Clear Interface
345 If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d")))
347 Return (TMCI (Arg1, Arg2, Arg3))
350 Return (Buffer () {0})