1 /** @file 2 The TPM definition block in ACPI table for physical presence 3 and MemoryClear. 4 5 Copyright (c) 2011 - 2016, 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 "TcgTable", 22 0x1000 23 ) 24 { 25 Scope (\_SB) 26 { 27 Device (TPM) 28 { 29 // 30 // Define _HID, "PNP0C31" is defined in 31 // "Secure Startup-FVE and TPM Admin BIOS and Platform Requirements" 32 // 33 Name (_HID, EISAID ("PNP0C31")) 34 35 // 36 // Readable name of this device, don't know if this way is correct yet 37 // 38 Name (_STR, Unicode ("TPM 1.2 Device")) 39 40 // 41 // Return the resource consumed by TPM device 42 // 43 Name (_CRS, ResourceTemplate () { 44 Memory32Fixed (ReadWrite, 0xfed40000, 0x5000) 45 }) 46 47 // 48 // Operational region for Smi port access 49 // 50 OperationRegion (SMIP, SystemIO, 0xB2, 1) 51 Field (SMIP, ByteAcc, NoLock, Preserve) 52 { 53 IOB2, 8 54 } 55 56 // 57 // Operational region for TPM access 58 // 59 OperationRegion (TPMR, SystemMemory, 0xfed40000, 0x5000) 60 Field (TPMR, AnyAcc, NoLock, Preserve) 61 { 62 ACC0, 8, 63 } 64 65 // 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. 68 // 69 OperationRegion (TNVS, SystemMemory, 0xFFFF0000, 0xF0) 70 Field (TNVS, AnyAcc, NoLock, Preserve) 71 { 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 LPPR, 32, // Last Physical Presence request operation 77 FRET, 32, // Physical Presence function return code 78 MCIN, 8, // Software SMI for Memory Clear Interface 79 MCIP, 32, // Used for save the Mor paramter 80 MORD, 32, // Memory Overwrite Request Data 81 MRET, 32, // Memory Overwrite function return code 82 UCRQ, 32 // Phyical Presence request operation to Get User Confirmation Status 83 } 84 85 Method (PTS, 1, Serialized) 86 { 87 // 88 // Detect Sx state for MOR, only S4, S5 need to handle 89 // 90 If (LAnd (LLess (Arg0, 6), LGreater (Arg0, 3))) 91 { 92 // 93 // Bit4 -- DisableAutoDetect. 0 -- Firmware MAY autodetect. 94 // 95 If (LNot (And (MORD, 0x10))) 96 { 97 // 98 // Triggle the SMI through ACPI _PTS method. 99 // 100 Store (0x02, MCIP) 101 102 // 103 // Triggle the SMI interrupt 104 // 105 Store (MCIN, IOB2) 106 } 107 } 108 Return (0) 109 } 110 111 Method (_STA, 0) 112 { 113 if (LEqual (ACC0, 0xff)) 114 { 115 Return (0) 116 } 117 Return (0x0f) 118 } 119 120 // 121 // TCG Hardware Information 122 // 123 Method (HINF, 3, Serialized, 0, {BuffObj, PkgObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 124 { 125 // 126 // Switch by function index 127 // 128 Switch (ToInteger(Arg1)) 129 { 130 Case (0) 131 { 132 // 133 // Standard query 134 // 135 Return (Buffer () {0x03}) 136 } 137 Case (1) 138 { 139 // 140 // Return failure if no TPM present 141 // 142 Name(TPMV, Package () {0x01, Package () {0x1, 0x20}}) 143 if (LEqual (_STA (), 0x00)) 144 { 145 Return (Package () {0x00}) 146 } 147 148 // 149 // Return TPM version 150 // 151 Return (TPMV) 152 } 153 Default {BreakPoint} 154 } 155 Return (Buffer () {0}) 156 } 157 158 Name(TPM2, Package (0x02){ 159 Zero, 160 Zero 161 }) 162 163 Name(TPM3, Package (0x03){ 164 Zero, 165 Zero, 166 Zero 167 }) 168 169 // 170 // TCG Physical Presence Interface 171 // 172 Method (TPPI, 3, Serialized, 0, {BuffObj, PkgObj, IntObj, StrObj}, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 173 { 174 // 175 // Switch by function index 176 // 177 Switch (ToInteger(Arg1)) 178 { 179 Case (0) 180 { 181 // 182 // Standard query, supports function 1-8 183 // 184 Return (Buffer () {0xFF, 0x01}) 185 } 186 Case (1) 187 { 188 // 189 // a) Get Physical Presence Interface Version 190 // 191 Return ("1.2") 192 } 193 Case (2) 194 { 195 // 196 // b) Submit TPM Operation Request to Pre-OS Environment 197 // 198 199 Store (DerefOf (Index (Arg2, 0x00)), PPRQ) 200 Store (0x02, PPIP) 201 202 // 203 // Triggle the SMI interrupt 204 // 205 Store (PPIN, IOB2) 206 Return (FRET) 207 208 209 } 210 Case (3) 211 { 212 // 213 // c) Get Pending TPM Operation Requested By the OS 214 // 215 216 Store (PPRQ, Index (TPM2, 0x01)) 217 Return (TPM2) 218 } 219 Case (4) 220 { 221 // 222 // d) Get Platform-Specific Action to Transition to Pre-OS Environment 223 // 224 Return (2) 225 } 226 Case (5) 227 { 228 // 229 // e) Return TPM Operation Response to OS Environment 230 // 231 Store (0x05, PPIP) 232 233 // 234 // Triggle the SMI interrupt 235 // 236 Store (PPIN, IOB2) 237 238 Store (LPPR, Index (TPM3, 0x01)) 239 Store (PPRP, Index (TPM3, 0x02)) 240 241 Return (TPM3) 242 } 243 Case (6) 244 { 245 246 // 247 // f) Submit preferred user language (Not implemented) 248 // 249 250 Return (3) 251 252 } 253 Case (7) 254 { 255 // 256 // g) Submit TPM Operation Request to Pre-OS Environment 2 257 // 258 Store (7, PPIP) 259 Store (DerefOf (Index (Arg2, 0x00)), PPRQ) 260 261 // 262 // Triggle the SMI interrupt 263 // 264 Store (PPIN, IOB2) 265 Return (FRET) 266 } 267 Case (8) 268 { 269 // 270 // e) Get User Confirmation Status for Operation 271 // 272 Store (8, PPIP) 273 Store (DerefOf (Index (Arg2, 0x00)), UCRQ) 274 275 // 276 // Triggle the SMI interrupt 277 // 278 Store (PPIN, IOB2) 279 280 Return (FRET) 281 } 282 283 Default {BreakPoint} 284 } 285 Return (1) 286 } 287 288 Method (TMCI, 3, Serialized, 0, IntObj, {UnknownObj, UnknownObj, UnknownObj}) // IntObj, IntObj, PkgObj 289 { 290 // 291 // Switch by function index 292 // 293 Switch (ToInteger (Arg1)) 294 { 295 Case (0) 296 { 297 // 298 // Standard query, supports function 1-1 299 // 300 Return (Buffer () {0x03}) 301 } 302 Case (1) 303 { 304 // 305 // Save the Operation Value of the Request to MORD (reserved memory) 306 // 307 Store (DerefOf (Index (Arg2, 0x00)), MORD) 308 309 // 310 // Triggle the SMI through ACPI _DSM method. 311 // 312 Store (0x01, MCIP) 313 314 // 315 // Triggle the SMI interrupt 316 // 317 Store (MCIN, IOB2) 318 Return (MRET) 319 } 320 Default {BreakPoint} 321 } 322 Return (1) 323 } 324 325 Method (_DSM, 4, Serialized, 0, UnknownObj, {BuffObj, IntObj, IntObj, PkgObj}) 326 { 327 328 // 329 // TCG Hardware Information 330 // 331 If(LEqual(Arg0, ToUUID ("cf8e16a5-c1e8-4e25-b712-4f54a96702c8"))) 332 { 333 Return (HINF (Arg1, Arg2, Arg3)) 334 } 335 336 // 337 // TCG Physical Presence Interface 338 // 339 If(LEqual(Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653"))) 340 { 341 Return (TPPI (Arg1, Arg2, Arg3)) 342 } 343 344 // 345 // TCG Memory Clear Interface 346 // 347 If(LEqual(Arg0, ToUUID ("376054ed-cc13-4675-901c-4756d7f2d45d"))) 348 { 349 Return (TMCI (Arg1, Arg2, Arg3)) 350 } 351 352 Return (Buffer () {0}) 353 } 354 } 355 } 356 } 357
