1 /** @file 2 The TPM2 definition block in ACPI table for TrEE physical presence 3 and MemoryClear. 4 5 Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR> 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 DefinitionBlock ( 17 "Tpm.aml", 18 "SSDT", 19 2, 20 "INTEL ", 21 "Tpm2Tabl", 22 0x1000 23 ) 24 { 25 Scope (\_SB) 26 { 27 Device (TPM) 28 { 29 // 30 // TREE 31 // 32 Name (_HID, "MSFT0101") 33 34 // 35 // Readable name of this device, don't know if this way is correct yet 36 // 37 Name (_STR, Unicode ("TPM 2.0 Device")) 38 39 // 40 // Return the resource consumed by TPM device 41 // 42 Name (_CRS, ResourceTemplate () { 43 Memory32Fixed (ReadWrite, 0xfed40000, 0x5000) 44 }) 45 46 // 47 // Operational region for Smi port access 48 // 49 OperationRegion (SMIP, SystemIO, 0xB2, 1) 50 Field (SMIP, ByteAcc, NoLock, Preserve) 51 { 52 IOB2, 8 53 } 54 55 // 56 // Operational region for TPM access 57 // 58 OperationRegion (TPMR, SystemMemory, 0xfed40000, 0x5000) 59 Field (TPMR, AnyAcc, NoLock, Preserve) 60 { 61 ACC0, 8, 62 } 63 64 // 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. 67 // 68 OperationRegion (TNVS, SystemMemory, 0xFFFF0000, 0xF0) 69 Field (TNVS, AnyAcc, NoLock, Preserve) 70 { 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 81 } 82 83 Method (PTS, 1, Serialized) 84 { 85 // 86 // Detect Sx state for MOR, only S4, S5 need to handle 87 // 88 If (LAnd (LLess (Arg0, 6), LGreater (Arg0, 3))) 89 { 90 // 91 // Bit4 -- DisableAutoDetect. 0 -- Firmware MAY autodetect. 92 // 93 If (LNot (And (MORD, 0x10))) 94 { 95 // 96 // Triggle the SMI through ACPI _PTS method. 97 // 98 Store (0x02, MCIP) 99 100 // 101 // Triggle the SMI interrupt 102 // 103 Store (MCIN, IOB2) 104 } 105 } 106 Return (0) 107 } 108 109 Method (_STA, 0) 110 { 111 if (LEqual (ACC0, 0xff)) 112 { 113 Return (0) 114 } 115 Return (0x0f) 116 } 117 118 // 119 // TCG Hardware Information 120 // 121 Method (HINF, 3, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 122 { 123 // 124 // Switch by function index 125 // 126 Switch (ToInteger(Arg1)) 127 { 128 Case (0) 129 { 130 // 131 // Standard query 132 // 133 Return (Buffer () {0x03}) 134 } 135 Case (1) 136 { 137 // 138 // Return failure if no TPM present 139 // 140 Name(TPMV, Package () {0x01, Package () {0x2, 0x0}}) 141 if (LEqual (_STA (), 0x00)) 142 { 143 Return (Package () {0x00}) 144 } 145 146 // 147 // Return TPM version 148 // 149 Return (TPMV) 150 } 151 Default {BreakPoint} 152 } 153 Return (Buffer () {0}) 154 } 155 156 Name(TPM2, Package (0x02){ 157 Zero, 158 Zero 159 }) 160 161 Name(TPM3, Package (0x03){ 162 Zero, 163 Zero, 164 Zero 165 }) 166 167 // 168 // TCG Physical Presence Interface 169 // 170 Method (TPPI, 3, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 171 { 172 // 173 // Switch by function index 174 // 175 Switch (ToInteger(Arg1)) 176 { 177 Case (0) 178 { 179 // 180 // Standard query, supports function 1-8 181 // 182 Return (Buffer () {0xFF, 0x01}) 183 } 184 Case (1) 185 { 186 // 187 // a) Get Physical Presence Interface Version 188 // 189 Return ("1.2") 190 } 191 Case (2) 192 { 193 // 194 // b) Submit TPM Operation Request to Pre-OS Environment 195 // 196 197 Store (DerefOf (Index (Arg2, 0x00)), PPRQ) 198 Store (0x02, PPIP) 199 200 // 201 // Triggle the SMI interrupt 202 // 203 Store (PPIN, IOB2) 204 Return (FRET) 205 206 207 } 208 Case (3) 209 { 210 // 211 // c) Get Pending TPM Operation Requested By the OS 212 // 213 214 Store (PPRQ, Index (TPM2, 0x01)) 215 Return (TPM2) 216 } 217 Case (4) 218 { 219 // 220 // d) Get Platform-Specific Action to Transition to Pre-OS Environment 221 // 222 Return (2) 223 } 224 Case (5) 225 { 226 // 227 // e) Return TPM Operation Response to OS Environment 228 // 229 Store (0x05, PPIP) 230 231 // 232 // Triggle the SMI interrupt 233 // 234 Store (PPIN, IOB2) 235 236 Store (LPPR, Index (TPM3, 0x01)) 237 Store (PPRP, Index (TPM3, 0x02)) 238 239 Return (TPM3) 240 } 241 Case (6) 242 { 243 244 // 245 // f) Submit preferred user language (Not implemented) 246 // 247 248 Return (3) 249 250 } 251 Case (7) 252 { 253 // 254 // g) Submit TPM Operation Request to Pre-OS Environment 2 255 // 256 Store (7, PPIP) 257 Store (DerefOf (Index (Arg2, 0x00)), PPRQ) 258 259 // 260 // Triggle the SMI interrupt 261 // 262 Store (PPIN, IOB2) 263 Return (FRET) 264 } 265 Case (8) 266 { 267 // 268 // e) Get User Confirmation Status for Operation 269 // 270 Store (8, PPIP) 271 Store (DerefOf (Index (Arg2, 0x00)), PPRQ) 272 273 // 274 // Triggle the SMI interrupt 275 // 276 Store (PPIN, IOB2) 277 278 Return (FRET) 279 } 280 281 Default {BreakPoint} 282 } 283 Return (1) 284 } 285 286 Method (TMCI, 3, Serialized, 0, IntObj, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 287 { 288 // 289 // Switch by function index 290 // 291 Switch (ToInteger (Arg1)) 292 { 293 Case (0) 294 { 295 // 296 // Standard query, supports function 1-1 297 // 298 Return (Buffer () {0x03}) 299 } 300 Case (1) 301 { 302 // 303 // Save the Operation Value of the Request to MORD (reserved memory) 304 // 305 Store (DerefOf (Index (Arg2, 0x00)), MORD) 306 307 // 308 // Triggle the SMI through ACPI _DSM method. 309 // 310 Store (0x01, MCIP) 311 312 // 313 // Triggle the SMI interrupt 314 // 315 Store (MCIN, IOB2) 316 Return (MRET) 317 } 318 Default {BreakPoint} 319 } 320 Return (1) 321 } 322 323 Method (_DSM, 4, Serialized, 0, UnknownObj, {BuffObj, IntObj, IntObj, PkgObj}) 324 { 325 326 // 327 // TCG Hardware Information 328 // 329 If(LEqual(Arg0, ToUUID ("cf8e16a5-c1e8-4e25-b712-4f54a96702c8"))) 330 { 331 Return (HINF (Arg1, Arg2, Arg3)) 332 } 333 334 // 335 // TCG Physical Presence Interface 336 // 337 If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653"))) 338 { 339 Return (TPPI (Arg1, Arg2, Arg3)) 340 } 341 342 // 343 // TCG Memory Clear Interface 344 // 345 If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d"))) 346 { 347 Return (TMCI (Arg1, Arg2, Arg3)) 348 } 349 350 Return (Buffer () {0}) 351 } 352 } 353 } 354 } 355
