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c1d93242 JY |
1 | /** @file\r |
2 | TIS (TPM Interface Specification) functions used by TPM1.2.\r | |
3 | \r | |
6f785cfc | 4 | Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>\r |
6aaac383 | 5 | (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r |
c1d93242 JY |
6 | This program and the accompanying materials \r |
7 | are licensed and made available under the terms and conditions of the BSD License \r | |
8 | which accompanies this distribution. The full text of the license may be found at \r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Uefi.h>\r | |
17 | #include <IndustryStandard/Tpm12.h>\r | |
18 | #include <Library/BaseLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/IoLib.h>\r | |
21 | #include <Library/TimerLib.h>\r | |
22 | #include <Library/DebugLib.h>\r | |
23 | #include <Library/Tpm12CommandLib.h>\r | |
24 | #include <Library/PcdLib.h>\r | |
25 | \r | |
26 | //\r | |
27 | // Set structure alignment to 1-byte\r | |
28 | //\r | |
29 | #pragma pack (1)\r | |
30 | \r | |
31 | //\r | |
32 | // Register set map as specified in TIS specification Chapter 10\r | |
33 | //\r | |
34 | typedef struct {\r | |
35 | ///\r | |
36 | /// Used to gain ownership for this particular port.\r | |
37 | ///\r | |
38 | UINT8 Access; // 0\r | |
39 | UINT8 Reserved1[7]; // 1\r | |
40 | ///\r | |
41 | /// Controls interrupts.\r | |
42 | ///\r | |
43 | UINT32 IntEnable; // 8\r | |
44 | ///\r | |
45 | /// SIRQ vector to be used by the TPM.\r | |
46 | ///\r | |
47 | UINT8 IntVector; // 0ch\r | |
48 | UINT8 Reserved2[3]; // 0dh\r | |
49 | ///\r | |
50 | /// What caused interrupt.\r | |
51 | ///\r | |
52 | UINT32 IntSts; // 10h\r | |
53 | ///\r | |
54 | /// Shows which interrupts are supported by that particular TPM.\r | |
55 | ///\r | |
56 | UINT32 IntfCapability; // 14h\r | |
57 | ///\r | |
58 | /// Status Register. Provides status of the TPM.\r | |
59 | ///\r | |
60 | UINT8 Status; // 18h\r | |
61 | ///\r | |
62 | /// Number of consecutive writes that can be done to the TPM.\r | |
63 | ///\r | |
64 | UINT16 BurstCount; // 19h\r | |
65 | UINT8 Reserved3[9];\r | |
66 | ///\r | |
67 | /// Read or write FIFO, depending on transaction.\r | |
68 | ///\r | |
69 | UINT32 DataFifo; // 24h\r | |
70 | UINT8 Reserved4[0xed8]; // 28h\r | |
71 | ///\r | |
72 | /// Vendor ID\r | |
73 | ///\r | |
74 | UINT16 Vid; // 0f00h\r | |
75 | ///\r | |
76 | /// Device ID\r | |
77 | ///\r | |
78 | UINT16 Did; // 0f02h\r | |
79 | ///\r | |
80 | /// Revision ID\r | |
81 | ///\r | |
82 | UINT8 Rid; // 0f04h\r | |
83 | ///\r | |
84 | /// TCG defined configuration registers.\r | |
85 | ///\r | |
86 | UINT8 TcgDefined[0x7b]; // 0f05h\r | |
87 | ///\r | |
88 | /// Alias to I/O legacy space.\r | |
89 | ///\r | |
90 | UINT32 LegacyAddress1; // 0f80h\r | |
91 | ///\r | |
92 | /// Additional 8 bits for I/O legacy space extension.\r | |
93 | ///\r | |
94 | UINT32 LegacyAddress1Ex; // 0f84h\r | |
95 | ///\r | |
96 | /// Alias to second I/O legacy space.\r | |
97 | ///\r | |
98 | UINT32 LegacyAddress2; // 0f88h\r | |
99 | ///\r | |
100 | /// Additional 8 bits for second I/O legacy space extension.\r | |
101 | ///\r | |
102 | UINT32 LegacyAddress2Ex; // 0f8ch\r | |
103 | ///\r | |
104 | /// Vendor-defined configuration registers.\r | |
105 | ///\r | |
106 | UINT8 VendorDefined[0x70];// 0f90h\r | |
107 | } TIS_PC_REGISTERS;\r | |
108 | \r | |
109 | //\r | |
110 | // Restore original structure alignment\r | |
111 | //\r | |
112 | #pragma pack ()\r | |
113 | \r | |
114 | //\r | |
115 | // Define pointer types used to access TIS registers on PC\r | |
116 | //\r | |
117 | typedef TIS_PC_REGISTERS *TIS_PC_REGISTERS_PTR;\r | |
118 | \r | |
119 | //\r | |
120 | // Define bits of ACCESS and STATUS registers\r | |
121 | //\r | |
122 | \r | |
123 | ///\r | |
124 | /// This bit is a 1 to indicate that the other bits in this register are valid.\r | |
125 | ///\r | |
126 | #define TIS_PC_VALID BIT7\r | |
127 | ///\r | |
128 | /// Indicate that this locality is active.\r | |
129 | ///\r | |
130 | #define TIS_PC_ACC_ACTIVE BIT5\r | |
131 | ///\r | |
132 | /// Set to 1 to indicate that this locality had the TPM taken away while\r | |
133 | /// this locality had the TIS_PC_ACC_ACTIVE bit set.\r | |
134 | ///\r | |
135 | #define TIS_PC_ACC_SEIZED BIT4\r | |
136 | ///\r | |
137 | /// Set to 1 to indicate that TPM MUST reset the\r | |
138 | /// TIS_PC_ACC_ACTIVE bit and remove ownership for localities less than the\r | |
139 | /// locality that is writing this bit.\r | |
140 | ///\r | |
141 | #define TIS_PC_ACC_SEIZE BIT3\r | |
142 | ///\r | |
143 | /// When this bit is 1, another locality is requesting usage of the TPM.\r | |
144 | ///\r | |
145 | #define TIS_PC_ACC_PENDIND BIT2\r | |
146 | ///\r | |
147 | /// Set to 1 to indicate that this locality is requesting to use TPM.\r | |
148 | ///\r | |
149 | #define TIS_PC_ACC_RQUUSE BIT1\r | |
150 | ///\r | |
151 | /// A value of 1 indicates that a T/OS has not been established on the platform\r | |
152 | ///\r | |
153 | #define TIS_PC_ACC_ESTABLISH BIT0\r | |
154 | \r | |
155 | ///\r | |
156 | /// When this bit is 1, TPM is in the Ready state, \r | |
157 | /// indicating it is ready to receive a new command.\r | |
158 | ///\r | |
159 | #define TIS_PC_STS_READY BIT6\r | |
160 | ///\r | |
161 | /// Write a 1 to this bit to cause the TPM to execute that command.\r | |
162 | ///\r | |
163 | #define TIS_PC_STS_GO BIT5\r | |
164 | ///\r | |
165 | /// This bit indicates that the TPM has data available as a response.\r | |
166 | ///\r | |
167 | #define TIS_PC_STS_DATA BIT4\r | |
168 | ///\r | |
169 | /// The TPM sets this bit to a value of 1 when it expects another byte of data for a command.\r | |
170 | ///\r | |
171 | #define TIS_PC_STS_EXPECT BIT3\r | |
172 | ///\r | |
173 | /// Writes a 1 to this bit to force the TPM to re-send the response.\r | |
174 | ///\r | |
175 | #define TIS_PC_STS_RETRY BIT1\r | |
176 | \r | |
177 | //\r | |
178 | // Default TimeOut value\r | |
179 | //\r | |
180 | #define TIS_TIMEOUT_A (750 * 1000) // 750ms\r | |
181 | #define TIS_TIMEOUT_B (2000 * 1000) // 2s\r | |
182 | #define TIS_TIMEOUT_C (750 * 1000) // 750ms\r | |
183 | #define TIS_TIMEOUT_D (750 * 1000) // 750ms\r | |
184 | \r | |
185 | //\r | |
186 | // Max TPM command/reponse length\r | |
187 | //\r | |
188 | #define TPMCMDBUFLENGTH 1024\r | |
189 | \r | |
190 | /**\r | |
191 | Check whether TPM chip exist.\r | |
192 | \r | |
193 | @param[in] TisReg Pointer to TIS register.\r | |
194 | \r | |
195 | @retval TRUE TPM chip exists.\r | |
196 | @retval FALSE TPM chip is not found.\r | |
197 | **/\r | |
198 | BOOLEAN\r | |
199 | Tpm12TisPcPresenceCheck (\r | |
200 | IN TIS_PC_REGISTERS_PTR TisReg\r | |
201 | )\r | |
202 | {\r | |
203 | UINT8 RegRead;\r | |
204 | \r | |
205 | RegRead = MmioRead8 ((UINTN)&TisReg->Access);\r | |
206 | return (BOOLEAN)(RegRead != (UINT8)-1);\r | |
207 | }\r | |
208 | \r | |
209 | /**\r | |
210 | Check whether the value of a TPM chip register satisfies the input BIT setting.\r | |
211 | \r | |
212 | @param[in] Register Address port of register to be checked.\r | |
213 | @param[in] BitSet Check these data bits are set.\r | |
214 | @param[in] BitClear Check these data bits are clear.\r | |
215 | @param[in] TimeOut The max wait time (unit MicroSecond) when checking register.\r | |
216 | \r | |
217 | @retval EFI_SUCCESS The register satisfies the check bit.\r | |
218 | @retval EFI_TIMEOUT The register can't run into the expected status in time.\r | |
219 | **/\r | |
220 | EFI_STATUS\r | |
c1d93242 JY |
221 | Tpm12TisPcWaitRegisterBits (\r |
222 | IN UINT8 *Register,\r | |
223 | IN UINT8 BitSet,\r | |
224 | IN UINT8 BitClear,\r | |
225 | IN UINT32 TimeOut\r | |
226 | )\r | |
227 | {\r | |
228 | UINT8 RegRead;\r | |
229 | UINT32 WaitTime;\r | |
230 | \r | |
231 | for (WaitTime = 0; WaitTime < TimeOut; WaitTime += 30){\r | |
232 | RegRead = MmioRead8 ((UINTN)Register);\r | |
233 | if ((RegRead & BitSet) == BitSet && (RegRead & BitClear) == 0)\r | |
234 | return EFI_SUCCESS;\r | |
235 | MicroSecondDelay (30);\r | |
236 | }\r | |
237 | return EFI_TIMEOUT;\r | |
238 | }\r | |
239 | \r | |
240 | /**\r | |
241 | Get BurstCount by reading the burstCount field of a TIS regiger \r | |
242 | in the time of default TIS_TIMEOUT_D.\r | |
243 | \r | |
244 | @param[in] TisReg Pointer to TIS register.\r | |
245 | @param[out] BurstCount Pointer to a buffer to store the got BurstConut.\r | |
246 | \r | |
247 | @retval EFI_SUCCESS Get BurstCount.\r | |
248 | @retval EFI_INVALID_PARAMETER TisReg is NULL or BurstCount is NULL.\r | |
249 | @retval EFI_TIMEOUT BurstCount can't be got in time.\r | |
250 | **/\r | |
251 | EFI_STATUS\r | |
c1d93242 JY |
252 | Tpm12TisPcReadBurstCount (\r |
253 | IN TIS_PC_REGISTERS_PTR TisReg,\r | |
254 | OUT UINT16 *BurstCount\r | |
255 | )\r | |
256 | {\r | |
257 | UINT32 WaitTime;\r | |
258 | UINT8 DataByte0;\r | |
259 | UINT8 DataByte1;\r | |
260 | \r | |
261 | if (BurstCount == NULL || TisReg == NULL) {\r | |
262 | return EFI_INVALID_PARAMETER;\r | |
263 | }\r | |
264 | \r | |
265 | WaitTime = 0;\r | |
266 | do {\r | |
267 | //\r | |
268 | // TIS_PC_REGISTERS_PTR->burstCount is UINT16, but it is not 2bytes aligned,\r | |
269 | // so it needs to use MmioRead8 to read two times\r | |
270 | //\r | |
271 | DataByte0 = MmioRead8 ((UINTN)&TisReg->BurstCount);\r | |
272 | DataByte1 = MmioRead8 ((UINTN)&TisReg->BurstCount + 1);\r | |
273 | *BurstCount = (UINT16)((DataByte1 << 8) + DataByte0);\r | |
274 | if (*BurstCount != 0) {\r | |
275 | return EFI_SUCCESS;\r | |
276 | }\r | |
277 | MicroSecondDelay (30);\r | |
278 | WaitTime += 30;\r | |
279 | } while (WaitTime < TIS_TIMEOUT_D);\r | |
280 | \r | |
281 | return EFI_TIMEOUT;\r | |
282 | }\r | |
283 | \r | |
284 | /**\r | |
285 | Set TPM chip to ready state by sending ready command TIS_PC_STS_READY \r | |
286 | to Status Register in time.\r | |
287 | \r | |
288 | @param[in] TisReg Pointer to TIS register.\r | |
289 | \r | |
290 | @retval EFI_SUCCESS TPM chip enters into ready state.\r | |
291 | @retval EFI_INVALID_PARAMETER TisReg is NULL.\r | |
292 | @retval EFI_TIMEOUT TPM chip can't be set to ready state in time.\r | |
293 | **/\r | |
294 | EFI_STATUS\r | |
c1d93242 JY |
295 | Tpm12TisPcPrepareCommand (\r |
296 | IN TIS_PC_REGISTERS_PTR TisReg\r | |
297 | )\r | |
298 | {\r | |
299 | EFI_STATUS Status;\r | |
300 | \r | |
301 | if (TisReg == NULL) {\r | |
302 | return EFI_INVALID_PARAMETER;\r | |
303 | }\r | |
304 | \r | |
305 | MmioWrite8((UINTN)&TisReg->Status, TIS_PC_STS_READY);\r | |
306 | Status = Tpm12TisPcWaitRegisterBits (\r | |
307 | &TisReg->Status,\r | |
308 | TIS_PC_STS_READY,\r | |
309 | 0,\r | |
310 | TIS_TIMEOUT_B\r | |
311 | );\r | |
312 | return Status;\r | |
313 | }\r | |
314 | \r | |
315 | /**\r | |
316 | Get the control of TPM chip by sending requestUse command TIS_PC_ACC_RQUUSE \r | |
317 | to ACCESS Register in the time of default TIS_TIMEOUT_A.\r | |
318 | \r | |
319 | @param[in] TisReg Pointer to TIS register.\r | |
320 | \r | |
321 | @retval EFI_SUCCESS Get the control of TPM chip.\r | |
322 | @retval EFI_INVALID_PARAMETER TisReg is NULL.\r | |
323 | @retval EFI_NOT_FOUND TPM chip doesn't exit.\r | |
324 | @retval EFI_TIMEOUT Can't get the TPM control in time.\r | |
325 | **/\r | |
326 | EFI_STATUS\r | |
c1d93242 JY |
327 | Tpm12TisPcRequestUseTpm (\r |
328 | IN TIS_PC_REGISTERS_PTR TisReg\r | |
329 | )\r | |
330 | {\r | |
331 | EFI_STATUS Status;\r | |
332 | \r | |
333 | if (TisReg == NULL) {\r | |
334 | return EFI_INVALID_PARAMETER;\r | |
335 | }\r | |
336 | \r | |
337 | if (!Tpm12TisPcPresenceCheck (TisReg)) {\r | |
338 | return EFI_NOT_FOUND;\r | |
339 | }\r | |
340 | \r | |
341 | MmioWrite8((UINTN)&TisReg->Access, TIS_PC_ACC_RQUUSE);\r | |
342 | Status = Tpm12TisPcWaitRegisterBits (\r | |
343 | &TisReg->Access,\r | |
344 | (UINT8)(TIS_PC_ACC_ACTIVE |TIS_PC_VALID),\r | |
345 | 0,\r | |
346 | TIS_TIMEOUT_A\r | |
347 | );\r | |
348 | return Status;\r | |
349 | }\r | |
350 | \r | |
351 | /**\r | |
352 | Send a command to TPM for execution and return response data.\r | |
353 | \r | |
354 | @param[in] TisReg TPM register space base address. \r | |
355 | @param[in] BufferIn Buffer for command data. \r | |
356 | @param[in] SizeIn Size of command data. \r | |
357 | @param[in, out] BufferOut Buffer for response data. \r | |
358 | @param[in, out] SizeOut Size of response data. \r | |
359 | \r | |
360 | @retval EFI_SUCCESS Operation completed successfully.\r | |
c1d93242 JY |
361 | @retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.\r |
362 | @retval EFI_DEVICE_ERROR Unexpected device behavior.\r | |
363 | @retval EFI_UNSUPPORTED Unsupported TPM version\r | |
364 | \r | |
365 | **/\r | |
366 | EFI_STATUS\r | |
367 | Tpm12TisTpmCommand (\r | |
368 | IN TIS_PC_REGISTERS_PTR TisReg,\r | |
369 | IN UINT8 *BufferIn,\r | |
370 | IN UINT32 SizeIn,\r | |
371 | IN OUT UINT8 *BufferOut,\r | |
372 | IN OUT UINT32 *SizeOut\r | |
373 | )\r | |
374 | {\r | |
375 | EFI_STATUS Status;\r | |
376 | UINT16 BurstCount;\r | |
377 | UINT32 Index;\r | |
378 | UINT32 TpmOutSize;\r | |
379 | UINT16 Data16;\r | |
380 | UINT32 Data32;\r | |
381 | \r | |
382 | DEBUG_CODE (\r | |
383 | UINTN DebugSize;\r | |
384 | \r | |
6aaac383 | 385 | DEBUG ((EFI_D_VERBOSE, "Tpm12TisTpmCommand Send - "));\r |
c1d93242 JY |
386 | if (SizeIn > 0x100) {\r |
387 | DebugSize = 0x40;\r | |
388 | } else {\r | |
389 | DebugSize = SizeIn;\r | |
390 | }\r | |
391 | for (Index = 0; Index < DebugSize; Index++) {\r | |
6aaac383 | 392 | DEBUG ((EFI_D_VERBOSE, "%02x ", BufferIn[Index]));\r |
c1d93242 JY |
393 | }\r |
394 | if (DebugSize != SizeIn) {\r | |
6aaac383 | 395 | DEBUG ((EFI_D_VERBOSE, "...... "));\r |
c1d93242 | 396 | for (Index = SizeIn - 0x20; Index < SizeIn; Index++) {\r |
6aaac383 | 397 | DEBUG ((EFI_D_VERBOSE, "%02x ", BufferIn[Index]));\r |
c1d93242 JY |
398 | }\r |
399 | }\r | |
6aaac383 | 400 | DEBUG ((EFI_D_VERBOSE, "\n"));\r |
c1d93242 JY |
401 | );\r |
402 | TpmOutSize = 0;\r | |
403 | \r | |
404 | Status = Tpm12TisPcPrepareCommand (TisReg);\r | |
405 | if (EFI_ERROR (Status)){\r | |
406 | DEBUG ((DEBUG_ERROR, "Tpm12 is not ready for command!\n"));\r | |
6f785cfc | 407 | return EFI_DEVICE_ERROR;\r |
c1d93242 JY |
408 | }\r |
409 | //\r | |
410 | // Send the command data to Tpm\r | |
411 | //\r | |
412 | Index = 0;\r | |
413 | while (Index < SizeIn) {\r | |
414 | Status = Tpm12TisPcReadBurstCount (TisReg, &BurstCount);\r | |
415 | if (EFI_ERROR (Status)) {\r | |
6f785cfc | 416 | Status = EFI_DEVICE_ERROR;\r |
c1d93242 JY |
417 | goto Exit;\r |
418 | }\r | |
419 | for (; BurstCount > 0 && Index < SizeIn; BurstCount--) {\r | |
420 | MmioWrite8((UINTN)&TisReg->DataFifo, *(BufferIn + Index));\r | |
421 | Index++;\r | |
422 | }\r | |
423 | }\r | |
424 | //\r | |
425 | // Check the Tpm status STS_EXPECT change from 1 to 0\r | |
426 | //\r | |
427 | Status = Tpm12TisPcWaitRegisterBits (\r | |
428 | &TisReg->Status,\r | |
429 | (UINT8) TIS_PC_VALID,\r | |
430 | TIS_PC_STS_EXPECT,\r | |
431 | TIS_TIMEOUT_C\r | |
432 | );\r | |
433 | if (EFI_ERROR (Status)) {\r | |
434 | DEBUG ((DEBUG_ERROR, "Tpm12 The send buffer too small!\n"));\r | |
435 | Status = EFI_BUFFER_TOO_SMALL;\r | |
436 | goto Exit;\r | |
437 | }\r | |
438 | //\r | |
439 | // Executed the TPM command and waiting for the response data ready\r | |
440 | //\r | |
441 | MmioWrite8((UINTN)&TisReg->Status, TIS_PC_STS_GO);\r | |
442 | Status = Tpm12TisPcWaitRegisterBits (\r | |
443 | &TisReg->Status,\r | |
444 | (UINT8) (TIS_PC_VALID | TIS_PC_STS_DATA),\r | |
445 | 0,\r | |
446 | TIS_TIMEOUT_B\r | |
447 | );\r | |
448 | if (EFI_ERROR (Status)) {\r | |
449 | DEBUG ((DEBUG_ERROR, "Wait for Tpm12 response data time out!!\n"));\r | |
6f785cfc | 450 | Status = EFI_DEVICE_ERROR;\r |
c1d93242 JY |
451 | goto Exit;\r |
452 | }\r | |
453 | //\r | |
454 | // Get response data header\r | |
455 | //\r | |
456 | Index = 0;\r | |
457 | BurstCount = 0;\r | |
458 | while (Index < sizeof (TPM_RSP_COMMAND_HDR)) {\r | |
459 | Status = Tpm12TisPcReadBurstCount (TisReg, &BurstCount);\r | |
460 | if (EFI_ERROR (Status)) {\r | |
6f785cfc | 461 | Status = EFI_DEVICE_ERROR;\r |
c1d93242 JY |
462 | goto Exit;\r |
463 | }\r | |
464 | for (; BurstCount > 0; BurstCount--) {\r | |
465 | *(BufferOut + Index) = MmioRead8 ((UINTN)&TisReg->DataFifo);\r | |
466 | Index++;\r | |
467 | if (Index == sizeof (TPM_RSP_COMMAND_HDR)) break;\r | |
468 | }\r | |
469 | }\r | |
470 | DEBUG_CODE (\r | |
6aaac383 | 471 | DEBUG ((EFI_D_VERBOSE, "Tpm12TisTpmCommand ReceiveHeader - "));\r |
c1d93242 | 472 | for (Index = 0; Index < sizeof (TPM_RSP_COMMAND_HDR); Index++) {\r |
6aaac383 | 473 | DEBUG ((EFI_D_VERBOSE, "%02x ", BufferOut[Index]));\r |
c1d93242 | 474 | }\r |
6aaac383 | 475 | DEBUG ((EFI_D_VERBOSE, "\n"));\r |
c1d93242 JY |
476 | );\r |
477 | //\r | |
478 | // Check the reponse data header (tag,parasize and returncode )\r | |
479 | //\r | |
480 | CopyMem (&Data16, BufferOut, sizeof (UINT16));\r | |
481 | if (SwapBytes16 (Data16) != TPM_TAG_RSP_COMMAND) {\r | |
482 | DEBUG ((EFI_D_ERROR, "TPM12: TPM_ST_RSP error - %x\n", TPM_TAG_RSP_COMMAND));\r | |
483 | Status = EFI_UNSUPPORTED;\r | |
484 | goto Exit;\r | |
485 | }\r | |
486 | \r | |
487 | CopyMem (&Data32, (BufferOut + 2), sizeof (UINT32));\r | |
488 | TpmOutSize = SwapBytes32 (Data32);\r | |
489 | if (*SizeOut < TpmOutSize) {\r | |
490 | Status = EFI_BUFFER_TOO_SMALL;\r | |
491 | goto Exit;\r | |
492 | }\r | |
493 | *SizeOut = TpmOutSize;\r | |
494 | //\r | |
495 | // Continue reading the remaining data\r | |
496 | //\r | |
497 | while ( Index < TpmOutSize ) {\r | |
498 | for (; BurstCount > 0; BurstCount--) {\r | |
499 | *(BufferOut + Index) = MmioRead8 ((UINTN)&TisReg->DataFifo);\r | |
500 | Index++;\r | |
501 | if (Index == TpmOutSize) {\r | |
502 | Status = EFI_SUCCESS;\r | |
503 | goto Exit;\r | |
504 | }\r | |
505 | }\r | |
506 | Status = Tpm12TisPcReadBurstCount (TisReg, &BurstCount);\r | |
507 | if (EFI_ERROR (Status)) {\r | |
6f785cfc | 508 | Status = EFI_DEVICE_ERROR;\r |
c1d93242 JY |
509 | goto Exit;\r |
510 | }\r | |
511 | }\r | |
512 | Exit:\r | |
513 | DEBUG_CODE (\r | |
6aaac383 | 514 | DEBUG ((EFI_D_VERBOSE, "Tpm12TisTpmCommand Receive - "));\r |
c1d93242 | 515 | for (Index = 0; Index < TpmOutSize; Index++) {\r |
6aaac383 | 516 | DEBUG ((EFI_D_VERBOSE, "%02x ", BufferOut[Index]));\r |
c1d93242 | 517 | }\r |
6aaac383 | 518 | DEBUG ((EFI_D_VERBOSE, "\n"));\r |
c1d93242 JY |
519 | );\r |
520 | MmioWrite8((UINTN)&TisReg->Status, TIS_PC_STS_READY);\r | |
521 | return Status;\r | |
522 | }\r | |
523 | \r | |
524 | /**\r | |
525 | This service enables the sending of commands to the TPM12.\r | |
526 | \r | |
527 | @param[in] InputParameterBlockSize Size of the TPM12 input parameter block.\r | |
528 | @param[in] InputParameterBlock Pointer to the TPM12 input parameter block.\r | |
529 | @param[in,out] OutputParameterBlockSize Size of the TPM12 output parameter block.\r | |
530 | @param[in] OutputParameterBlock Pointer to the TPM12 output parameter block.\r | |
531 | \r | |
532 | @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.\r | |
533 | @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.\r | |
534 | @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small. \r | |
535 | **/\r | |
536 | EFI_STATUS\r | |
537 | EFIAPI\r | |
538 | Tpm12SubmitCommand (\r | |
539 | IN UINT32 InputParameterBlockSize,\r | |
540 | IN UINT8 *InputParameterBlock,\r | |
541 | IN OUT UINT32 *OutputParameterBlockSize,\r | |
542 | IN UINT8 *OutputParameterBlock\r | |
543 | )\r | |
544 | {\r | |
545 | return Tpm12TisTpmCommand (\r | |
546 | (TIS_PC_REGISTERS_PTR) (UINTN) PcdGet64 (PcdTpmBaseAddress),\r | |
547 | InputParameterBlock,\r | |
548 | InputParameterBlockSize,\r | |
549 | OutputParameterBlock,\r | |
550 | OutputParameterBlockSize\r | |
551 | );\r | |
552 | }\r | |
553 | \r | |
554 | /**\r | |
555 | This service requests use TPM12.\r | |
556 | \r | |
557 | @retval EFI_SUCCESS Get the control of TPM12 chip.\r | |
558 | @retval EFI_NOT_FOUND TPM12 not found.\r | |
559 | @retval EFI_DEVICE_ERROR Unexpected device behavior.\r | |
560 | **/\r | |
561 | EFI_STATUS\r | |
562 | EFIAPI\r | |
563 | Tpm12RequestUseTpm (\r | |
564 | VOID\r | |
565 | )\r | |
566 | {\r | |
567 | return Tpm12TisPcRequestUseTpm ((TIS_PC_REGISTERS_PTR) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r | |
568 | }\r |