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1 | ;------------------------------------------------------------------------------\r | |
2 | ;\r | |
3 | ; Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r | |
4 | ; This program and the accompanying materials\r | |
5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
7 | ; http://opensource.org/licenses/bsd-license.php.\r | |
8 | ;\r | |
9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | ;\r | |
12 | ; Abstract:\r | |
13 | ;\r | |
14 | ; Provide FSP API entry points.\r | |
15 | ;\r | |
16 | ;------------------------------------------------------------------------------\r | |
17 | \r | |
18 | .586p\r | |
19 | .model flat,C\r | |
20 | .code\r | |
21 | .xmm\r | |
22 | \r | |
23 | INCLUDE SaveRestoreSse.inc\r | |
24 | INCLUDE UcodeLoad.inc\r | |
25 | \r | |
26 | ;\r | |
27 | ; Following are fixed PCDs\r | |
28 | ;\r | |
29 | EXTERN PcdGet32(PcdTemporaryRamBase):DWORD\r | |
30 | EXTERN PcdGet32(PcdTemporaryRamSize):DWORD\r | |
31 | EXTERN PcdGet32(PcdFspTemporaryRamSize):DWORD\r | |
32 | \r | |
33 | ;\r | |
34 | ; Following functions will be provided in C\r | |
35 | ;\r | |
36 | EXTERN FspImageSizeOffset:DWORD\r | |
37 | EXTERN SecStartup:PROC\r | |
38 | EXTERN FspApiCallingCheck:PROC\r | |
39 | \r | |
40 | ;\r | |
41 | ; Following functions will be provided in PlatformSecLib\r | |
42 | ;\r | |
43 | EXTERN GetFspBaseAddress:PROC\r | |
44 | EXTERN GetBootFirmwareVolumeOffset:PROC\r | |
45 | EXTERN PlatformTempRamInit:PROC\r | |
46 | EXTERN Pei2LoaderSwitchStack:PROC\r | |
47 | EXTERN FspSelfCheck(FspSelfCheckDflt):PROC\r | |
48 | EXTERN PlatformBasicInit(PlatformBasicInitDflt):PROC\r | |
49 | EXTERN LoadUcode(LoadUcodeDflt):PROC\r | |
50 | \r | |
51 | ;\r | |
52 | ; Define the data length that we saved on the stack top\r | |
53 | ;\r | |
54 | DATA_LEN_OF_PER0 EQU 18h\r | |
55 | DATA_LEN_OF_MCUD EQU 18h\r | |
56 | DATA_LEN_AT_STACK_TOP EQU (DATA_LEN_OF_PER0 + DATA_LEN_OF_MCUD + 4)\r | |
57 | \r | |
58 | ;------------------------------------------------------------------------------\r | |
59 | FspSelfCheckDflt PROC NEAR PUBLIC\r | |
60 | ; Inputs:\r | |
61 | ; eax -> Return address\r | |
62 | ; Outputs:\r | |
63 | ; eax -> 0 - Successful, Non-zero - Failed.\r | |
64 | ; Register Usage:\r | |
65 | ; eax is cleared and ebp is used for return address.\r | |
66 | ; All others reserved.\r | |
67 | \r | |
68 | ; Save return address to EBP\r | |
69 | mov ebp, eax\r | |
70 | \r | |
71 | xor eax, eax\r | |
72 | exit:\r | |
73 | jmp ebp\r | |
74 | FspSelfCheckDflt ENDP\r | |
75 | \r | |
76 | ;------------------------------------------------------------------------------\r | |
77 | PlatformBasicInitDflt PROC NEAR PUBLIC\r | |
78 | ; Inputs:\r | |
79 | ; eax -> Return address\r | |
80 | ; Outputs:\r | |
81 | ; eax -> 0 - Successful, Non-zero - Failed.\r | |
82 | ; Register Usage:\r | |
83 | ; eax is cleared and ebp is used for return address.\r | |
84 | ; All others reserved.\r | |
85 | \r | |
86 | ; Save return address to EBP\r | |
87 | mov ebp, eax\r | |
88 | \r | |
89 | xor eax, eax\r | |
90 | exit:\r | |
91 | jmp ebp\r | |
92 | PlatformBasicInitDflt ENDP\r | |
93 | \r | |
94 | ;------------------------------------------------------------------------------\r | |
95 | LoadUcodeDflt PROC NEAR PUBLIC\r | |
96 | ; Inputs:\r | |
97 | ; esp -> LOAD_UCODE_PARAMS pointer\r | |
98 | ; Register Usage:\r | |
99 | ; esp Preserved\r | |
100 | ; All others destroyed\r | |
101 | ; Assumptions:\r | |
102 | ; No memory available, stack is hard-coded and used for return address\r | |
103 | ; Executed by SBSP and NBSP\r | |
104 | ; Beginning of microcode update region starts on paragraph boundary\r | |
105 | \r | |
106 | ;\r | |
107 | ;\r | |
108 | ; Save return address to EBP\r | |
109 | mov ebp, eax\r | |
110 | \r | |
111 | cmp esp, 0\r | |
112 | jz paramerror\r | |
113 | mov eax, dword ptr [esp] ; Parameter pointer\r | |
114 | cmp eax, 0\r | |
115 | jz paramerror\r | |
116 | mov esp, eax\r | |
117 | mov esi, [esp].LOAD_UCODE_PARAMS.ucode_code_addr\r | |
118 | cmp esi, 0\r | |
119 | jnz check_main_header\r | |
120 | \r | |
121 | paramerror:\r | |
122 | mov eax, 080000002h\r | |
123 | jmp exit\r | |
124 | \r | |
125 | mov esi, [esp].LOAD_UCODE_PARAMS.ucode_code_addr\r | |
126 | \r | |
127 | check_main_header:\r | |
128 | ; Get processor signature and platform ID from the installed processor\r | |
129 | ; and save into registers for later use\r | |
130 | ; ebx = processor signature\r | |
131 | ; edx = platform ID\r | |
132 | mov eax, 1\r | |
133 | cpuid\r | |
134 | mov ebx, eax\r | |
135 | mov ecx, MSR_IA32_PLATFORM_ID\r | |
136 | rdmsr\r | |
137 | mov ecx, edx\r | |
138 | shr ecx, 50-32\r | |
139 | and ecx, 7h\r | |
140 | mov edx, 1\r | |
141 | shl edx, cl\r | |
142 | \r | |
143 | ; Current register usage\r | |
144 | ; esp -> stack with paramters\r | |
145 | ; esi -> microcode update to check\r | |
146 | ; ebx = processor signature\r | |
147 | ; edx = platform ID\r | |
148 | \r | |
149 | ; Check for valid microcode header\r | |
150 | ; Minimal test checking for header version and loader version as 1\r | |
151 | mov eax, dword ptr 1\r | |
152 | cmp [esi].ucode_hdr.version, eax\r | |
153 | jne advance_fixed_size\r | |
154 | cmp [esi].ucode_hdr.loader, eax\r | |
155 | jne advance_fixed_size\r | |
156 | \r | |
157 | ; Check if signature and plaform ID match\r | |
158 | cmp ebx, [esi].ucode_hdr.processor\r | |
159 | jne @f\r | |
160 | test edx, [esi].ucode_hdr.flags\r | |
161 | jnz load_check ; Jif signature and platform ID match\r | |
162 | \r | |
163 | @@:\r | |
164 | ; Check if extended header exists\r | |
165 | ; First check if total_size and data_size are valid\r | |
166 | xor eax, eax\r | |
167 | cmp [esi].ucode_hdr.total_size, eax\r | |
168 | je next_microcode\r | |
169 | cmp [esi].ucode_hdr.data_size, eax\r | |
170 | je next_microcode\r | |
171 | \r | |
172 | ; Then verify total size - sizeof header > data size\r | |
173 | mov ecx, [esi].ucode_hdr.total_size\r | |
174 | sub ecx, sizeof ucode_hdr\r | |
175 | cmp ecx, [esi].ucode_hdr.data_size\r | |
176 | jng next_microcode ; Jif extended header does not exist\r | |
177 | \r | |
178 | ; Set edi -> extended header\r | |
179 | mov edi, esi\r | |
180 | add edi, sizeof ucode_hdr\r | |
181 | add edi, [esi].ucode_hdr.data_size\r | |
182 | \r | |
183 | ; Get count of extended structures\r | |
184 | mov ecx, [edi].ext_sig_hdr.count\r | |
185 | \r | |
186 | ; Move pointer to first signature structure\r | |
187 | add edi, sizeof ext_sig_hdr\r | |
188 | \r | |
189 | check_ext_sig:\r | |
190 | ; Check if extended signature and platform ID match\r | |
191 | cmp [edi].ext_sig.processor, ebx\r | |
192 | jne @f\r | |
193 | test [edi].ext_sig.flags, edx\r | |
194 | jnz load_check ; Jif signature and platform ID match\r | |
195 | @@:\r | |
196 | ; Check if any more extended signatures exist\r | |
197 | add edi, sizeof ext_sig\r | |
198 | loop check_ext_sig\r | |
199 | \r | |
200 | next_microcode:\r | |
201 | ; Advance just after end of this microcode\r | |
202 | xor eax, eax\r | |
203 | cmp [esi].ucode_hdr.total_size, eax\r | |
204 | je @f\r | |
205 | add esi, [esi].ucode_hdr.total_size\r | |
206 | jmp check_address\r | |
207 | @@:\r | |
208 | add esi, dword ptr 2048\r | |
209 | jmp check_address\r | |
210 | \r | |
211 | advance_fixed_size:\r | |
212 | ; Advance by 4X dwords\r | |
213 | add esi, dword ptr 1024\r | |
214 | \r | |
215 | check_address:\r | |
216 | ; Is valid Microcode start point ?\r | |
217 | cmp dword ptr [esi], 0ffffffffh\r | |
218 | jz done\r | |
219 | \r | |
220 | ; Address >= microcode region address + microcode region size?\r | |
221 | mov eax, [esp].LOAD_UCODE_PARAMS.ucode_code_addr\r | |
222 | add eax, [esp].LOAD_UCODE_PARAMS.ucode_code_size\r | |
223 | cmp esi, eax\r | |
224 | jae done ;Jif address is outside of ucode region\r | |
225 | jmp check_main_header\r | |
226 | \r | |
227 | load_check:\r | |
228 | ; Get the revision of the current microcode update loaded\r | |
229 | mov ecx, MSR_IA32_BIOS_SIGN_ID\r | |
230 | xor eax, eax ; Clear EAX\r | |
231 | xor edx, edx ; Clear EDX\r | |
232 | wrmsr ; Load 0 to MSR at 8Bh\r | |
233 | \r | |
234 | mov eax, 1\r | |
235 | cpuid\r | |
236 | mov ecx, MSR_IA32_BIOS_SIGN_ID\r | |
237 | rdmsr ; Get current microcode signature\r | |
238 | \r | |
239 | ; Verify this microcode update is not already loaded\r | |
240 | cmp [esi].ucode_hdr.revision, edx\r | |
241 | je continue\r | |
242 | \r | |
243 | load_microcode:\r | |
244 | ; EAX contains the linear address of the start of the Update Data\r | |
245 | ; EDX contains zero\r | |
246 | ; ECX contains 79h (IA32_BIOS_UPDT_TRIG)\r | |
247 | ; Start microcode load with wrmsr\r | |
248 | mov eax, esi\r | |
249 | add eax, sizeof ucode_hdr\r | |
250 | xor edx, edx\r | |
251 | mov ecx, MSR_IA32_BIOS_UPDT_TRIG\r | |
252 | wrmsr\r | |
253 | mov eax, 1\r | |
254 | cpuid\r | |
255 | \r | |
256 | continue:\r | |
257 | jmp next_microcode\r | |
258 | \r | |
259 | done:\r | |
260 | mov eax, 1\r | |
261 | cpuid\r | |
262 | mov ecx, MSR_IA32_BIOS_SIGN_ID\r | |
263 | rdmsr ; Get current microcode signature\r | |
264 | xor eax, eax\r | |
265 | cmp edx, 0\r | |
266 | jnz exit\r | |
267 | mov eax, 08000000Eh\r | |
268 | \r | |
269 | exit:\r | |
270 | jmp ebp\r | |
271 | \r | |
272 | LoadUcodeDflt ENDP\r | |
273 | \r | |
274 | ;----------------------------------------------------------------------------\r | |
275 | ; TempRamInit API\r | |
276 | ;\r | |
277 | ; This FSP API will load the microcode update, enable code caching for the\r | |
278 | ; region specified by the boot loader and also setup a temporary stack to be\r | |
279 | ; used till main memory is initialized.\r | |
280 | ;\r | |
281 | ;----------------------------------------------------------------------------\r | |
282 | TempRamInitApi PROC NEAR PUBLIC\r | |
283 | ;\r | |
284 | ; Ensure SSE is enabled\r | |
285 | ;\r | |
286 | ENABLE_SSE\r | |
287 | \r | |
288 | ;\r | |
289 | ; Save EBP, EBX, ESI, EDI & ESP in XMM7 & XMM6\r | |
290 | ;\r | |
291 | SAVE_REGS\r | |
292 | \r | |
293 | ;\r | |
294 | ; Save timestamp into XMM4 & XMM5\r | |
295 | ;\r | |
296 | rdtsc\r | |
297 | SAVE_EAX\r | |
298 | SAVE_EDX\r | |
299 | \r | |
300 | ;\r | |
301 | ; Check Parameter\r | |
302 | ;\r | |
303 | mov eax, dword ptr [esp + 4]\r | |
304 | cmp eax, 0\r | |
305 | mov eax, 80000002h\r | |
306 | jz NemInitExit\r | |
307 | \r | |
308 | ;\r | |
309 | ; CPUID/DeviceID check\r | |
310 | ;\r | |
311 | mov eax, @F\r | |
312 | jmp FspSelfCheck ; Note: ESP can not be changed.\r | |
313 | @@:\r | |
314 | cmp eax, 0\r | |
315 | jnz NemInitExit\r | |
316 | \r | |
317 | ;\r | |
318 | ; Platform Basic Init.\r | |
319 | ;\r | |
320 | mov eax, @F\r | |
321 | jmp PlatformBasicInit\r | |
322 | @@:\r | |
323 | cmp eax, 0\r | |
324 | jnz NemInitExit\r | |
325 | \r | |
326 | ;\r | |
327 | ; Load microcode\r | |
328 | ;\r | |
329 | mov eax, @F\r | |
330 | add esp, 4\r | |
331 | jmp LoadUcode\r | |
332 | @@:\r | |
333 | LOAD_ESP\r | |
334 | cmp eax, 0\r | |
335 | jnz NemInitExit\r | |
336 | \r | |
337 | ;\r | |
338 | ; Call platform NEM init\r | |
339 | ;\r | |
340 | mov eax, @F\r | |
341 | add esp, 4\r | |
342 | jmp PlatformTempRamInit\r | |
343 | @@:\r | |
344 | LOAD_ESP\r | |
345 | cmp eax, 0\r | |
346 | jnz NemInitExit\r | |
347 | \r | |
348 | ;\r | |
349 | ; Save parameter pointer in edx\r | |
350 | ;\r | |
351 | mov edx, dword ptr [esp + 4]\r | |
352 | \r | |
353 | ;\r | |
354 | ; Enable FSP STACK\r | |
355 | ;\r | |
356 | mov esp, PcdGet32(PcdTemporaryRamBase)\r | |
357 | add esp, PcdGet32(PcdTemporaryRamSize)\r | |
358 | \r | |
359 | push DATA_LEN_OF_MCUD ; Size of the data region\r | |
360 | push 4455434Dh ; Signature of the data region 'MCUD'\r | |
361 | push dword ptr [edx + 4] ; Microcode size\r | |
362 | push dword ptr [edx + 0] ; Microcode base\r | |
363 | push dword ptr [edx + 12] ; Code size\r | |
364 | push dword ptr [edx + 8] ; Code base\r | |
365 | \r | |
366 | ;\r | |
367 | ; Save API entry/exit timestamp into stack\r | |
368 | ;\r | |
369 | push DATA_LEN_OF_PER0 ; Size of the data region\r | |
370 | push 30524550h ; Signature of the data region 'PER0'\r | |
371 | rdtsc\r | |
372 | push edx\r | |
373 | push eax\r | |
374 | LOAD_EAX\r | |
375 | LOAD_EDX\r | |
376 | push edx\r | |
377 | push eax\r | |
378 | \r | |
379 | ;\r | |
380 | ; Terminator for the data on stack\r | |
381 | ;\r | |
382 | push 0\r | |
383 | \r | |
384 | ;\r | |
385 | ; Set ECX/EDX to the bootloader temporary memory range\r | |
386 | ;\r | |
387 | mov ecx, PcdGet32(PcdTemporaryRamBase)\r | |
388 | mov edx, ecx\r | |
389 | add edx, PcdGet32(PcdTemporaryRamSize)\r | |
390 | sub edx, PcdGet32(PcdFspTemporaryRamSize)\r | |
391 | \r | |
392 | xor eax, eax\r | |
393 | \r | |
394 | NemInitExit:\r | |
395 | ;\r | |
396 | ; Load EBP, EBX, ESI, EDI & ESP from XMM7 & XMM6\r | |
397 | ;\r | |
398 | LOAD_REGS\r | |
399 | ret\r | |
400 | TempRamInitApi ENDP\r | |
401 | \r | |
402 | ;----------------------------------------------------------------------------\r | |
403 | ; FspInit API\r | |
404 | ;\r | |
405 | ; This FSP API will perform the processor and chipset initialization.\r | |
406 | ; This API will not return. Instead, it transfers the control to the\r | |
407 | ; ContinuationFunc provided in the parameter.\r | |
408 | ;\r | |
409 | ;----------------------------------------------------------------------------\r | |
410 | FspInitApi PROC NEAR PUBLIC\r | |
411 | ;\r | |
412 | ; Stack must be ready\r | |
413 | ;\r | |
414 | push 087654321h\r | |
415 | pop eax\r | |
416 | cmp eax, 087654321h\r | |
417 | jz @F\r | |
418 | mov eax, 080000003h\r | |
419 | jmp exit\r | |
420 | \r | |
421 | @@:\r | |
422 | ;\r | |
423 | ; Additional check\r | |
424 | ;\r | |
425 | pushad\r | |
426 | push 1\r | |
427 | call FspApiCallingCheck\r | |
428 | add esp, 4\r | |
429 | mov dword ptr [esp + 4 * 7], eax\r | |
430 | popad\r | |
431 | cmp eax, 0\r | |
432 | jz @F\r | |
433 | jmp exit\r | |
434 | \r | |
435 | @@:\r | |
436 | ;\r | |
437 | ; Store the address in FSP which will return control to the BL\r | |
438 | ;\r | |
439 | push offset exit\r | |
440 | \r | |
441 | ;\r | |
442 | ; Create a Task Frame in the stack for the Boot Loader\r | |
443 | ;\r | |
444 | pushfd ; 2 pushf for 4 byte alignment\r | |
445 | cli\r | |
446 | pushad\r | |
447 | \r | |
448 | ; Reserve 8 bytes for IDT save/restore\r | |
449 | sub esp, 8\r | |
450 | sidt fword ptr [esp]\r | |
451 | \r | |
452 | ;\r | |
453 | ; Setup new FSP stack\r | |
454 | ;\r | |
455 | mov eax, esp\r | |
456 | mov esp, PcdGet32(PcdTemporaryRamBase)\r | |
457 | add esp, PcdGet32(PcdTemporaryRamSize)\r | |
458 | sub esp, (DATA_LEN_AT_STACK_TOP + 40h)\r | |
459 | \r | |
460 | ;\r | |
461 | ; Save the bootloader's stack pointer\r | |
462 | ;\r | |
463 | push eax\r | |
464 | \r | |
465 | ;\r | |
466 | ; Pass entry point of the PEI core\r | |
467 | ;\r | |
468 | call GetFspBaseAddress\r | |
469 | mov edi, FspImageSizeOffset\r | |
470 | mov edi, DWORD PTR [eax + edi]\r | |
471 | add edi, eax\r | |
472 | sub edi, 20h\r | |
473 | add eax, DWORD PTR [edi]\r | |
474 | push eax\r | |
475 | \r | |
476 | ;\r | |
477 | ; Pass BFV into the PEI Core\r | |
478 | ; It uses relative address to calucate the actual boot FV base\r | |
479 | ; For FSP impleantion with single FV, PcdFlashFvRecoveryBase and\r | |
480 | ; PcdFspAreaBaseAddress are the same. For FSP with mulitple FVs,\r | |
481 | ; they are different. The code below can handle both cases.\r | |
482 | ;\r | |
483 | call GetFspBaseAddress\r | |
484 | mov edi, eax\r | |
485 | call GetBootFirmwareVolumeOffset\r | |
486 | add eax, edi\r | |
487 | push eax\r | |
488 | \r | |
489 | ;\r | |
490 | ; Pass stack base and size into the PEI Core\r | |
491 | ;\r | |
492 | mov eax, PcdGet32(PcdTemporaryRamBase)\r | |
493 | add eax, PcdGet32(PcdTemporaryRamSize)\r | |
494 | sub eax, PcdGet32(PcdFspTemporaryRamSize)\r | |
495 | push eax\r | |
496 | push PcdGet32(PcdFspTemporaryRamSize)\r | |
497 | \r | |
498 | ;\r | |
499 | ; Pass Control into the PEI Core\r | |
500 | ;\r | |
501 | call SecStartup\r | |
502 | \r | |
503 | exit:\r | |
504 | ret\r | |
505 | \r | |
506 | FspInitApi ENDP\r | |
507 | \r | |
508 | ;----------------------------------------------------------------------------\r | |
509 | ; NotifyPhase API\r | |
510 | ;\r | |
511 | ; This FSP API will notify the FSP about the different phases in the boot\r | |
512 | ; process\r | |
513 | ;\r | |
514 | ;----------------------------------------------------------------------------\r | |
515 | NotifyPhaseApi PROC C PUBLIC\r | |
516 | ;\r | |
517 | ; Stack must be ready\r | |
518 | ;\r | |
519 | push 087654321h\r | |
520 | pop eax\r | |
521 | cmp eax, 087654321h\r | |
522 | jz @F\r | |
523 | mov eax, 080000003h\r | |
524 | jmp err_exit\r | |
525 | \r | |
526 | @@:\r | |
527 | ;\r | |
528 | ; Verify the calling condition\r | |
529 | ;\r | |
530 | pushad\r | |
531 | push 2\r | |
532 | call FspApiCallingCheck\r | |
533 | add esp, 4\r | |
534 | mov dword ptr [esp + 4 * 7], eax\r | |
535 | popad\r | |
536 | \r | |
537 | cmp eax, 0\r | |
538 | jz @F\r | |
539 | \r | |
540 | ;\r | |
541 | ; Error return\r | |
542 | ;\r | |
543 | err_exit:\r | |
544 | ret\r | |
545 | \r | |
546 | @@:\r | |
547 | jmp Pei2LoaderSwitchStack\r | |
548 | \r | |
549 | NotifyPhaseApi ENDP\r | |
550 | \r | |
551 | \r | |
552 | END\r |