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bb4aa855 JJ |
1 | /** @file\r |
2 | Main SEC phase code. Transitions to PEI.\r | |
3 | \r | |
f3e34b9d | 4 | Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>\r |
bb4aa855 JJ |
5 | \r |
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 <PiPei.h>\r | |
17 | \r | |
18 | #include <Library/PeimEntryPoint.h>\r | |
19 | #include <Library/BaseLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/BaseMemoryLib.h>\r | |
22 | #include <Library/PeiServicesLib.h>\r | |
23 | #include <Library/PcdLib.h>\r | |
24 | #include <Library/UefiCpuLib.h>\r | |
25 | #include <Library/DebugAgentLib.h>\r | |
26 | #include <Library/IoLib.h>\r | |
27 | #include <Library/PeCoffLib.h>\r | |
28 | #include <Library/PeCoffGetEntryPointLib.h>\r | |
29 | #include <Library/PeCoffExtraActionLib.h>\r | |
30 | #include <Library/ExtractGuidedSectionLib.h>\r | |
f3e34b9d | 31 | #include <Library/LocalApicLib.h>\r |
bb4aa855 JJ |
32 | \r |
33 | #include <Ppi/TemporaryRamSupport.h>\r | |
34 | \r | |
35 | #define SEC_IDT_ENTRY_COUNT 34\r | |
36 | \r | |
37 | typedef struct _SEC_IDT_TABLE {\r | |
38 | EFI_PEI_SERVICES *PeiService;\r | |
39 | IA32_IDT_GATE_DESCRIPTOR IdtTable[SEC_IDT_ENTRY_COUNT];\r | |
40 | } SEC_IDT_TABLE;\r | |
41 | \r | |
42 | VOID\r | |
43 | EFIAPI\r | |
44 | SecStartupPhase2 (\r | |
45 | IN VOID *Context\r | |
46 | );\r | |
47 | \r | |
48 | EFI_STATUS\r | |
49 | EFIAPI\r | |
50 | TemporaryRamMigration (\r | |
51 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
52 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,\r | |
53 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,\r | |
54 | IN UINTN CopySize\r | |
55 | );\r | |
56 | \r | |
57 | //\r | |
58 | //\r | |
59 | // \r | |
60 | EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI mTemporaryRamSupportPpi = {\r | |
61 | TemporaryRamMigration\r | |
62 | };\r | |
63 | \r | |
64 | EFI_PEI_PPI_DESCRIPTOR mPrivateDispatchTable[] = {\r | |
65 | {\r | |
66 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
67 | &gEfiTemporaryRamSupportPpiGuid,\r | |
68 | &mTemporaryRamSupportPpi\r | |
69 | },\r | |
70 | };\r | |
71 | \r | |
72 | //\r | |
73 | // Template of an IDT entry pointing to 10:FFFFFFE4h.\r | |
74 | //\r | |
75 | IA32_IDT_GATE_DESCRIPTOR mIdtEntryTemplate = {\r | |
76 | { // Bits\r | |
77 | 0xffe4, // OffsetLow\r | |
78 | 0x10, // Selector\r | |
79 | 0x0, // Reserved_0\r | |
80 | IA32_IDT_GATE_TYPE_INTERRUPT_32, // GateType\r | |
81 | 0xffff // OffsetHigh\r | |
82 | } \r | |
83 | };\r | |
84 | \r | |
85 | /**\r | |
86 | Locates the main boot firmware volume.\r | |
87 | \r | |
88 | @param[in,out] BootFv On input, the base of the BootFv\r | |
89 | On output, the decompressed main firmware volume\r | |
90 | \r | |
91 | @retval EFI_SUCCESS The main firmware volume was located and decompressed\r | |
92 | @retval EFI_NOT_FOUND The main firmware volume was not found\r | |
93 | \r | |
94 | **/\r | |
95 | EFI_STATUS\r | |
96 | FindMainFv (\r | |
97 | IN OUT EFI_FIRMWARE_VOLUME_HEADER **BootFv\r | |
98 | )\r | |
99 | {\r | |
100 | EFI_FIRMWARE_VOLUME_HEADER *Fv;\r | |
101 | UINTN Distance;\r | |
102 | \r | |
103 | ASSERT (((UINTN) *BootFv & EFI_PAGE_MASK) == 0);\r | |
104 | \r | |
105 | Fv = *BootFv;\r | |
106 | Distance = (UINTN) (*BootFv)->FvLength;\r | |
107 | do {\r | |
108 | Fv = (EFI_FIRMWARE_VOLUME_HEADER*) ((UINT8*) Fv - EFI_PAGE_SIZE);\r | |
109 | Distance += EFI_PAGE_SIZE;\r | |
110 | if (Distance > SIZE_32MB) {\r | |
111 | return EFI_NOT_FOUND;\r | |
112 | }\r | |
113 | \r | |
114 | if (Fv->Signature != EFI_FVH_SIGNATURE) {\r | |
115 | continue;\r | |
116 | }\r | |
117 | \r | |
118 | if ((UINTN) Fv->FvLength > Distance) {\r | |
119 | continue;\r | |
120 | }\r | |
121 | \r | |
122 | *BootFv = Fv;\r | |
123 | return EFI_SUCCESS;\r | |
124 | \r | |
125 | } while (TRUE);\r | |
126 | }\r | |
127 | \r | |
128 | /**\r | |
129 | Locates a section within a series of sections\r | |
130 | with the specified section type.\r | |
131 | \r | |
4b4b783d JJ |
132 | The Instance parameter indicates which instance of the section\r |
133 | type to return. (0 is first instance, 1 is second...)\r | |
134 | \r | |
bb4aa855 JJ |
135 | @param[in] Sections The sections to search\r |
136 | @param[in] SizeOfSections Total size of all sections\r | |
137 | @param[in] SectionType The section type to locate\r | |
4b4b783d | 138 | @param[in] Instance The section instance number\r |
bb4aa855 JJ |
139 | @param[out] FoundSection The FFS section if found\r |
140 | \r | |
141 | @retval EFI_SUCCESS The file and section was found\r | |
142 | @retval EFI_NOT_FOUND The file and section was not found\r | |
143 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
144 | \r | |
145 | **/\r | |
146 | EFI_STATUS\r | |
4b4b783d | 147 | FindFfsSectionInstance (\r |
bb4aa855 JJ |
148 | IN VOID *Sections,\r |
149 | IN UINTN SizeOfSections,\r | |
150 | IN EFI_SECTION_TYPE SectionType,\r | |
4b4b783d | 151 | IN UINTN Instance,\r |
bb4aa855 JJ |
152 | OUT EFI_COMMON_SECTION_HEADER **FoundSection\r |
153 | )\r | |
154 | {\r | |
155 | EFI_PHYSICAL_ADDRESS CurrentAddress;\r | |
156 | UINT32 Size;\r | |
157 | EFI_PHYSICAL_ADDRESS EndOfSections;\r | |
158 | EFI_COMMON_SECTION_HEADER *Section;\r | |
159 | EFI_PHYSICAL_ADDRESS EndOfSection;\r | |
160 | \r | |
161 | //\r | |
162 | // Loop through the FFS file sections within the PEI Core FFS file\r | |
163 | //\r | |
164 | EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) Sections;\r | |
165 | EndOfSections = EndOfSection + SizeOfSections;\r | |
166 | for (;;) {\r | |
167 | if (EndOfSection == EndOfSections) {\r | |
168 | break;\r | |
169 | }\r | |
170 | CurrentAddress = (EndOfSection + 3) & ~(3ULL);\r | |
171 | if (CurrentAddress >= EndOfSections) {\r | |
172 | return EFI_VOLUME_CORRUPTED;\r | |
173 | }\r | |
174 | \r | |
175 | Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;\r | |
bb4aa855 JJ |
176 | \r |
177 | Size = SECTION_SIZE (Section);\r | |
178 | if (Size < sizeof (*Section)) {\r | |
179 | return EFI_VOLUME_CORRUPTED;\r | |
180 | }\r | |
181 | \r | |
182 | EndOfSection = CurrentAddress + Size;\r | |
183 | if (EndOfSection > EndOfSections) {\r | |
184 | return EFI_VOLUME_CORRUPTED;\r | |
185 | }\r | |
186 | \r | |
187 | //\r | |
188 | // Look for the requested section type\r | |
189 | //\r | |
190 | if (Section->Type == SectionType) {\r | |
4b4b783d JJ |
191 | if (Instance == 0) {\r |
192 | *FoundSection = Section;\r | |
193 | return EFI_SUCCESS;\r | |
194 | } else {\r | |
195 | Instance--;\r | |
196 | }\r | |
bb4aa855 | 197 | }\r |
bb4aa855 JJ |
198 | }\r |
199 | \r | |
200 | return EFI_NOT_FOUND;\r | |
201 | }\r | |
202 | \r | |
4b4b783d JJ |
203 | /**\r |
204 | Locates a section within a series of sections\r | |
205 | with the specified section type.\r | |
206 | \r | |
207 | @param[in] Sections The sections to search\r | |
208 | @param[in] SizeOfSections Total size of all sections\r | |
209 | @param[in] SectionType The section type to locate\r | |
210 | @param[out] FoundSection The FFS section if found\r | |
211 | \r | |
212 | @retval EFI_SUCCESS The file and section was found\r | |
213 | @retval EFI_NOT_FOUND The file and section was not found\r | |
214 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
215 | \r | |
216 | **/\r | |
217 | EFI_STATUS\r | |
218 | FindFfsSectionInSections (\r | |
219 | IN VOID *Sections,\r | |
220 | IN UINTN SizeOfSections,\r | |
221 | IN EFI_SECTION_TYPE SectionType,\r | |
222 | OUT EFI_COMMON_SECTION_HEADER **FoundSection\r | |
223 | )\r | |
224 | {\r | |
225 | return FindFfsSectionInstance (\r | |
226 | Sections,\r | |
227 | SizeOfSections,\r | |
228 | SectionType,\r | |
229 | 0,\r | |
230 | FoundSection\r | |
231 | );\r | |
232 | }\r | |
233 | \r | |
bb4aa855 JJ |
234 | /**\r |
235 | Locates a FFS file with the specified file type and a section\r | |
236 | within that file with the specified section type.\r | |
237 | \r | |
238 | @param[in] Fv The firmware volume to search\r | |
239 | @param[in] FileType The file type to locate\r | |
240 | @param[in] SectionType The section type to locate\r | |
241 | @param[out] FoundSection The FFS section if found\r | |
242 | \r | |
243 | @retval EFI_SUCCESS The file and section was found\r | |
244 | @retval EFI_NOT_FOUND The file and section was not found\r | |
245 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
246 | \r | |
247 | **/\r | |
248 | EFI_STATUS\r | |
bb4aa855 JJ |
249 | FindFfsFileAndSection (\r |
250 | IN EFI_FIRMWARE_VOLUME_HEADER *Fv,\r | |
251 | IN EFI_FV_FILETYPE FileType,\r | |
252 | IN EFI_SECTION_TYPE SectionType,\r | |
253 | OUT EFI_COMMON_SECTION_HEADER **FoundSection\r | |
254 | )\r | |
255 | {\r | |
256 | EFI_STATUS Status;\r | |
257 | EFI_PHYSICAL_ADDRESS CurrentAddress;\r | |
258 | EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;\r | |
259 | EFI_FFS_FILE_HEADER *File;\r | |
260 | UINT32 Size;\r | |
261 | EFI_PHYSICAL_ADDRESS EndOfFile;\r | |
262 | \r | |
263 | if (Fv->Signature != EFI_FVH_SIGNATURE) {\r | |
c67178b7 | 264 | DEBUG ((EFI_D_ERROR, "FV at %p does not have FV header signature\n", Fv));\r |
bb4aa855 JJ |
265 | return EFI_VOLUME_CORRUPTED;\r |
266 | }\r | |
267 | \r | |
268 | CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Fv;\r | |
269 | EndOfFirmwareVolume = CurrentAddress + Fv->FvLength;\r | |
270 | \r | |
271 | //\r | |
272 | // Loop through the FFS files in the Boot Firmware Volume\r | |
273 | //\r | |
274 | for (EndOfFile = CurrentAddress + Fv->HeaderLength; ; ) {\r | |
275 | \r | |
276 | CurrentAddress = (EndOfFile + 7) & ~(7ULL);\r | |
277 | if (CurrentAddress > EndOfFirmwareVolume) {\r | |
278 | return EFI_VOLUME_CORRUPTED;\r | |
279 | }\r | |
280 | \r | |
281 | File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;\r | |
282 | Size = *(UINT32*) File->Size & 0xffffff;\r | |
283 | if (Size < (sizeof (*File) + sizeof (EFI_COMMON_SECTION_HEADER))) {\r | |
284 | return EFI_VOLUME_CORRUPTED;\r | |
285 | }\r | |
bb4aa855 JJ |
286 | \r |
287 | EndOfFile = CurrentAddress + Size;\r | |
288 | if (EndOfFile > EndOfFirmwareVolume) {\r | |
289 | return EFI_VOLUME_CORRUPTED;\r | |
290 | }\r | |
291 | \r | |
292 | //\r | |
293 | // Look for the request file type\r | |
294 | //\r | |
295 | if (File->Type != FileType) {\r | |
bb4aa855 JJ |
296 | continue;\r |
297 | }\r | |
298 | \r | |
299 | Status = FindFfsSectionInSections (\r | |
300 | (VOID*) (File + 1),\r | |
301 | (UINTN) EndOfFile - (UINTN) (File + 1),\r | |
302 | SectionType,\r | |
303 | FoundSection\r | |
304 | );\r | |
305 | if (!EFI_ERROR (Status) || (Status == EFI_VOLUME_CORRUPTED)) {\r | |
306 | return Status;\r | |
307 | }\r | |
308 | }\r | |
309 | }\r | |
310 | \r | |
311 | /**\r | |
312 | Locates the compressed main firmware volume and decompresses it.\r | |
313 | \r | |
314 | @param[in,out] Fv On input, the firmware volume to search\r | |
b36f701d | 315 | On output, the decompressed BOOT/PEI FV\r |
bb4aa855 JJ |
316 | \r |
317 | @retval EFI_SUCCESS The file and section was found\r | |
318 | @retval EFI_NOT_FOUND The file and section was not found\r | |
319 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
320 | \r | |
321 | **/\r | |
322 | EFI_STATUS\r | |
b36f701d | 323 | DecompressMemFvs (\r |
bb4aa855 JJ |
324 | IN OUT EFI_FIRMWARE_VOLUME_HEADER **Fv\r |
325 | )\r | |
326 | {\r | |
327 | EFI_STATUS Status;\r | |
328 | EFI_GUID_DEFINED_SECTION *Section;\r | |
329 | UINT32 OutputBufferSize;\r | |
330 | UINT32 ScratchBufferSize;\r | |
331 | UINT16 SectionAttribute;\r | |
332 | UINT32 AuthenticationStatus;\r | |
333 | VOID *OutputBuffer;\r | |
334 | VOID *ScratchBuffer;\r | |
b36f701d JJ |
335 | EFI_FIRMWARE_VOLUME_IMAGE_SECTION *FvSection;\r |
336 | EFI_FIRMWARE_VOLUME_HEADER *PeiMemFv;\r | |
337 | EFI_FIRMWARE_VOLUME_HEADER *DxeMemFv;\r | |
bb4aa855 | 338 | \r |
b36f701d | 339 | FvSection = (EFI_FIRMWARE_VOLUME_IMAGE_SECTION*) NULL;\r |
bb4aa855 JJ |
340 | \r |
341 | Status = FindFfsFileAndSection (\r | |
342 | *Fv,\r | |
343 | EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE,\r | |
344 | EFI_SECTION_GUID_DEFINED,\r | |
345 | (EFI_COMMON_SECTION_HEADER**) &Section\r | |
346 | );\r | |
347 | if (EFI_ERROR (Status)) {\r | |
348 | DEBUG ((EFI_D_ERROR, "Unable to find GUID defined section\n"));\r | |
349 | return Status;\r | |
350 | }\r | |
351 | \r | |
352 | Status = ExtractGuidedSectionGetInfo (\r | |
353 | Section,\r | |
354 | &OutputBufferSize,\r | |
355 | &ScratchBufferSize,\r | |
356 | &SectionAttribute\r | |
357 | );\r | |
358 | if (EFI_ERROR (Status)) {\r | |
359 | DEBUG ((EFI_D_ERROR, "Unable to GetInfo for GUIDed section\n"));\r | |
360 | return Status;\r | |
361 | }\r | |
362 | \r | |
b36f701d | 363 | OutputBuffer = (VOID*) ((UINT8*)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase) + SIZE_1MB);\r |
bb4aa855 | 364 | ScratchBuffer = ALIGN_POINTER ((UINT8*) OutputBuffer + OutputBufferSize, SIZE_1MB);\r |
9beac0d8 LE |
365 | \r |
366 | DEBUG ((EFI_D_VERBOSE, "%a: OutputBuffer@%p+0x%x ScratchBuffer@%p+0x%x "\r | |
367 | "PcdOvmfDecompressionScratchEnd=0x%x\n", __FUNCTION__, OutputBuffer,\r | |
368 | OutputBufferSize, ScratchBuffer, ScratchBufferSize,\r | |
369 | PcdGet32 (PcdOvmfDecompressionScratchEnd)));\r | |
370 | ASSERT ((UINTN)ScratchBuffer + ScratchBufferSize ==\r | |
371 | PcdGet32 (PcdOvmfDecompressionScratchEnd));\r | |
372 | \r | |
bb4aa855 JJ |
373 | Status = ExtractGuidedSectionDecode (\r |
374 | Section,\r | |
375 | &OutputBuffer,\r | |
376 | ScratchBuffer,\r | |
377 | &AuthenticationStatus\r | |
378 | );\r | |
379 | if (EFI_ERROR (Status)) {\r | |
380 | DEBUG ((EFI_D_ERROR, "Error during GUID section decode\n"));\r | |
381 | return Status;\r | |
382 | }\r | |
383 | \r | |
b36f701d | 384 | Status = FindFfsSectionInstance (\r |
bb4aa855 JJ |
385 | OutputBuffer,\r |
386 | OutputBufferSize,\r | |
387 | EFI_SECTION_FIRMWARE_VOLUME_IMAGE,\r | |
b36f701d JJ |
388 | 0,\r |
389 | (EFI_COMMON_SECTION_HEADER**) &FvSection\r | |
bb4aa855 JJ |
390 | );\r |
391 | if (EFI_ERROR (Status)) {\r | |
b36f701d | 392 | DEBUG ((EFI_D_ERROR, "Unable to find PEI FV section\n"));\r |
bb4aa855 JJ |
393 | return Status;\r |
394 | }\r | |
395 | \r | |
b36f701d JJ |
396 | ASSERT (SECTION_SIZE (FvSection) ==\r |
397 | (PcdGet32 (PcdOvmfPeiMemFvSize) + sizeof (*FvSection)));\r | |
398 | ASSERT (FvSection->Type == EFI_SECTION_FIRMWARE_VOLUME_IMAGE);\r | |
bb4aa855 | 399 | \r |
b36f701d JJ |
400 | PeiMemFv = (EFI_FIRMWARE_VOLUME_HEADER*)(UINTN) PcdGet32 (PcdOvmfPeiMemFvBase);\r |
401 | CopyMem (PeiMemFv, (VOID*) (FvSection + 1), PcdGet32 (PcdOvmfPeiMemFvSize));\r | |
402 | \r | |
403 | if (PeiMemFv->Signature != EFI_FVH_SIGNATURE) {\r | |
404 | DEBUG ((EFI_D_ERROR, "Extracted FV at %p does not have FV header signature\n", PeiMemFv));\r | |
405 | CpuDeadLoop ();\r | |
406 | return EFI_VOLUME_CORRUPTED;\r | |
407 | }\r | |
408 | \r | |
409 | Status = FindFfsSectionInstance (\r | |
410 | OutputBuffer,\r | |
411 | OutputBufferSize,\r | |
412 | EFI_SECTION_FIRMWARE_VOLUME_IMAGE,\r | |
413 | 1,\r | |
414 | (EFI_COMMON_SECTION_HEADER**) &FvSection\r | |
415 | );\r | |
416 | if (EFI_ERROR (Status)) {\r | |
417 | DEBUG ((EFI_D_ERROR, "Unable to find DXE FV section\n"));\r | |
418 | return Status;\r | |
419 | }\r | |
420 | \r | |
421 | ASSERT (FvSection->Type == EFI_SECTION_FIRMWARE_VOLUME_IMAGE);\r | |
422 | ASSERT (SECTION_SIZE (FvSection) ==\r | |
423 | (PcdGet32 (PcdOvmfDxeMemFvSize) + sizeof (*FvSection)));\r | |
424 | \r | |
425 | DxeMemFv = (EFI_FIRMWARE_VOLUME_HEADER*)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase);\r | |
426 | CopyMem (DxeMemFv, (VOID*) (FvSection + 1), PcdGet32 (PcdOvmfDxeMemFvSize));\r | |
427 | \r | |
428 | if (DxeMemFv->Signature != EFI_FVH_SIGNATURE) {\r | |
429 | DEBUG ((EFI_D_ERROR, "Extracted FV at %p does not have FV header signature\n", DxeMemFv));\r | |
bb4aa855 JJ |
430 | CpuDeadLoop ();\r |
431 | return EFI_VOLUME_CORRUPTED;\r | |
432 | }\r | |
433 | \r | |
b36f701d | 434 | *Fv = PeiMemFv;\r |
bb4aa855 JJ |
435 | return EFI_SUCCESS;\r |
436 | }\r | |
437 | \r | |
438 | /**\r | |
439 | Locates the PEI Core entry point address\r | |
440 | \r | |
441 | @param[in] Fv The firmware volume to search\r | |
442 | @param[out] PeiCoreEntryPoint The entry point of the PEI Core image\r | |
443 | \r | |
444 | @retval EFI_SUCCESS The file and section was found\r | |
445 | @retval EFI_NOT_FOUND The file and section was not found\r | |
446 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
447 | \r | |
448 | **/\r | |
449 | EFI_STATUS\r | |
bb4aa855 JJ |
450 | FindPeiCoreImageBaseInFv (\r |
451 | IN EFI_FIRMWARE_VOLUME_HEADER *Fv,\r | |
452 | OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase\r | |
453 | )\r | |
454 | {\r | |
455 | EFI_STATUS Status;\r | |
456 | EFI_COMMON_SECTION_HEADER *Section;\r | |
457 | \r | |
458 | Status = FindFfsFileAndSection (\r | |
459 | Fv,\r | |
460 | EFI_FV_FILETYPE_PEI_CORE,\r | |
461 | EFI_SECTION_PE32,\r | |
462 | &Section\r | |
463 | );\r | |
464 | if (EFI_ERROR (Status)) {\r | |
465 | Status = FindFfsFileAndSection (\r | |
466 | Fv,\r | |
467 | EFI_FV_FILETYPE_PEI_CORE,\r | |
468 | EFI_SECTION_TE,\r | |
469 | &Section\r | |
470 | );\r | |
471 | if (EFI_ERROR (Status)) {\r | |
472 | DEBUG ((EFI_D_ERROR, "Unable to find PEI Core image\n"));\r | |
473 | return Status;\r | |
474 | }\r | |
475 | }\r | |
476 | \r | |
477 | *PeiCoreImageBase = (EFI_PHYSICAL_ADDRESS)(UINTN)(Section + 1);\r | |
478 | return EFI_SUCCESS;\r | |
479 | }\r | |
480 | \r | |
a781f709 JJ |
481 | \r |
482 | /**\r | |
483 | Reads 8-bits of CMOS data.\r | |
484 | \r | |
485 | Reads the 8-bits of CMOS data at the location specified by Index.\r | |
486 | The 8-bit read value is returned.\r | |
487 | \r | |
488 | @param Index The CMOS location to read.\r | |
489 | \r | |
490 | @return The value read.\r | |
491 | \r | |
492 | **/\r | |
493 | STATIC\r | |
494 | UINT8\r | |
495 | CmosRead8 (\r | |
496 | IN UINTN Index\r | |
497 | )\r | |
498 | {\r | |
499 | IoWrite8 (0x70, (UINT8) Index);\r | |
500 | return IoRead8 (0x71);\r | |
501 | }\r | |
502 | \r | |
503 | \r | |
504 | STATIC\r | |
505 | BOOLEAN\r | |
506 | IsS3Resume (\r | |
507 | VOID\r | |
508 | )\r | |
509 | {\r | |
510 | return (CmosRead8 (0xF) == 0xFE);\r | |
511 | }\r | |
512 | \r | |
513 | \r | |
514 | STATIC\r | |
515 | EFI_STATUS\r | |
516 | GetS3ResumePeiFv (\r | |
517 | IN OUT EFI_FIRMWARE_VOLUME_HEADER **PeiFv\r | |
518 | )\r | |
519 | {\r | |
520 | *PeiFv = (EFI_FIRMWARE_VOLUME_HEADER*)(UINTN) PcdGet32 (PcdOvmfPeiMemFvBase);\r | |
521 | return EFI_SUCCESS;\r | |
522 | }\r | |
523 | \r | |
524 | \r | |
bb4aa855 JJ |
525 | /**\r |
526 | Locates the PEI Core entry point address\r | |
527 | \r | |
528 | @param[in,out] Fv The firmware volume to search\r | |
529 | @param[out] PeiCoreEntryPoint The entry point of the PEI Core image\r | |
530 | \r | |
531 | @retval EFI_SUCCESS The file and section was found\r | |
532 | @retval EFI_NOT_FOUND The file and section was not found\r | |
533 | @retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted\r | |
534 | \r | |
535 | **/\r | |
536 | VOID\r | |
bb4aa855 JJ |
537 | FindPeiCoreImageBase (\r |
538 | IN OUT EFI_FIRMWARE_VOLUME_HEADER **BootFv,\r | |
539 | OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase\r | |
540 | )\r | |
541 | {\r | |
efb0f16e LE |
542 | BOOLEAN S3Resume;\r |
543 | \r | |
bb4aa855 JJ |
544 | *PeiCoreImageBase = 0;\r |
545 | \r | |
efb0f16e LE |
546 | S3Resume = IsS3Resume ();\r |
547 | if (S3Resume && !FeaturePcdGet (PcdSmmSmramRequire)) {\r | |
548 | //\r | |
549 | // A malicious runtime OS may have injected something into our previously\r | |
550 | // decoded PEI FV, but we don't care about that unless SMM/SMRAM is required.\r | |
551 | //\r | |
a781f709 JJ |
552 | DEBUG ((EFI_D_VERBOSE, "SEC: S3 resume\n"));\r |
553 | GetS3ResumePeiFv (BootFv);\r | |
554 | } else {\r | |
efb0f16e LE |
555 | //\r |
556 | // We're either not resuming, or resuming "securely" -- we'll decompress\r | |
557 | // both PEI FV and DXE FV from pristine flash.\r | |
558 | //\r | |
559 | DEBUG ((EFI_D_VERBOSE, "SEC: %a\n",\r | |
560 | S3Resume ? "S3 resume (with PEI decompression)" : "Normal boot"));\r | |
a781f709 | 561 | FindMainFv (BootFv);\r |
bb4aa855 | 562 | \r |
a781f709 JJ |
563 | DecompressMemFvs (BootFv);\r |
564 | }\r | |
bb4aa855 JJ |
565 | \r |
566 | FindPeiCoreImageBaseInFv (*BootFv, PeiCoreImageBase);\r | |
567 | }\r | |
568 | \r | |
569 | /**\r | |
570 | Find core image base.\r | |
571 | \r | |
572 | **/\r | |
573 | EFI_STATUS\r | |
bb4aa855 JJ |
574 | FindImageBase (\r |
575 | IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,\r | |
576 | OUT EFI_PHYSICAL_ADDRESS *SecCoreImageBase\r | |
577 | )\r | |
578 | {\r | |
579 | EFI_PHYSICAL_ADDRESS CurrentAddress;\r | |
580 | EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;\r | |
581 | EFI_FFS_FILE_HEADER *File;\r | |
582 | UINT32 Size;\r | |
583 | EFI_PHYSICAL_ADDRESS EndOfFile;\r | |
584 | EFI_COMMON_SECTION_HEADER *Section;\r | |
585 | EFI_PHYSICAL_ADDRESS EndOfSection;\r | |
586 | \r | |
587 | *SecCoreImageBase = 0;\r | |
588 | \r | |
589 | CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr;\r | |
590 | EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength;\r | |
591 | \r | |
592 | //\r | |
593 | // Loop through the FFS files in the Boot Firmware Volume\r | |
594 | //\r | |
595 | for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) {\r | |
596 | \r | |
597 | CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;\r | |
598 | if (CurrentAddress > EndOfFirmwareVolume) {\r | |
599 | return EFI_NOT_FOUND;\r | |
600 | }\r | |
601 | \r | |
602 | File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;\r | |
603 | Size = *(UINT32*) File->Size & 0xffffff;\r | |
604 | if (Size < sizeof (*File)) {\r | |
605 | return EFI_NOT_FOUND;\r | |
606 | }\r | |
607 | \r | |
608 | EndOfFile = CurrentAddress + Size;\r | |
609 | if (EndOfFile > EndOfFirmwareVolume) {\r | |
610 | return EFI_NOT_FOUND;\r | |
611 | }\r | |
612 | \r | |
613 | //\r | |
614 | // Look for SEC Core\r | |
615 | //\r | |
616 | if (File->Type != EFI_FV_FILETYPE_SECURITY_CORE) {\r | |
617 | continue;\r | |
618 | }\r | |
619 | \r | |
620 | //\r | |
621 | // Loop through the FFS file sections within the FFS file\r | |
622 | //\r | |
623 | EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) (File + 1);\r | |
624 | for (;;) {\r | |
625 | CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;\r | |
626 | Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;\r | |
627 | \r | |
628 | Size = *(UINT32*) Section->Size & 0xffffff;\r | |
629 | if (Size < sizeof (*Section)) {\r | |
630 | return EFI_NOT_FOUND;\r | |
631 | }\r | |
632 | \r | |
633 | EndOfSection = CurrentAddress + Size;\r | |
634 | if (EndOfSection > EndOfFile) {\r | |
635 | return EFI_NOT_FOUND;\r | |
636 | }\r | |
637 | \r | |
638 | //\r | |
639 | // Look for executable sections\r | |
640 | //\r | |
641 | if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) {\r | |
642 | if (File->Type == EFI_FV_FILETYPE_SECURITY_CORE) {\r | |
643 | *SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) (Section + 1);\r | |
644 | }\r | |
645 | break;\r | |
646 | }\r | |
647 | }\r | |
648 | \r | |
649 | //\r | |
650 | // SEC Core image found\r | |
651 | //\r | |
652 | if (*SecCoreImageBase != 0) {\r | |
653 | return EFI_SUCCESS;\r | |
654 | }\r | |
655 | }\r | |
656 | }\r | |
657 | \r | |
658 | /*\r | |
659 | Find and return Pei Core entry point.\r | |
660 | \r | |
661 | It also find SEC and PEI Core file debug inforamtion. It will report them if\r | |
662 | remote debug is enabled.\r | |
663 | \r | |
664 | **/\r | |
665 | VOID\r | |
bb4aa855 JJ |
666 | FindAndReportEntryPoints (\r |
667 | IN EFI_FIRMWARE_VOLUME_HEADER **BootFirmwareVolumePtr,\r | |
668 | OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint\r | |
669 | )\r | |
670 | {\r | |
671 | EFI_STATUS Status;\r | |
672 | EFI_PHYSICAL_ADDRESS SecCoreImageBase;\r | |
673 | EFI_PHYSICAL_ADDRESS PeiCoreImageBase;\r | |
674 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
675 | \r | |
676 | //\r | |
677 | // Find SEC Core and PEI Core image base\r | |
678 | //\r | |
679 | Status = FindImageBase (*BootFirmwareVolumePtr, &SecCoreImageBase);\r | |
680 | ASSERT_EFI_ERROR (Status);\r | |
681 | \r | |
682 | FindPeiCoreImageBase (BootFirmwareVolumePtr, &PeiCoreImageBase);\r | |
683 | \r | |
684 | ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));\r | |
685 | //\r | |
686 | // Report SEC Core debug information when remote debug is enabled\r | |
687 | //\r | |
688 | ImageContext.ImageAddress = SecCoreImageBase;\r | |
689 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r | |
690 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r | |
691 | \r | |
692 | //\r | |
693 | // Report PEI Core debug information when remote debug is enabled\r | |
694 | //\r | |
695 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)PeiCoreImageBase;\r | |
696 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r | |
697 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r | |
698 | \r | |
699 | //\r | |
700 | // Find PEI Core entry point\r | |
701 | //\r | |
702 | Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint);\r | |
703 | if (EFI_ERROR (Status)) {\r | |
704 | *PeiCoreEntryPoint = 0;\r | |
705 | }\r | |
706 | \r | |
707 | return;\r | |
708 | }\r | |
709 | \r | |
710 | VOID\r | |
711 | EFIAPI\r | |
712 | SecCoreStartupWithStack (\r | |
713 | IN EFI_FIRMWARE_VOLUME_HEADER *BootFv,\r | |
714 | IN VOID *TopOfCurrentStack\r | |
715 | )\r | |
716 | {\r | |
717 | EFI_SEC_PEI_HAND_OFF SecCoreData;\r | |
718 | SEC_IDT_TABLE IdtTableInStack;\r | |
719 | IA32_DESCRIPTOR IdtDescriptor;\r | |
720 | UINT32 Index;\r | |
320b4f08 LE |
721 | volatile UINT8 *Table;\r |
722 | \r | |
723 | //\r | |
724 | // To ensure SMM can't be compromised on S3 resume, we must force re-init of\r | |
725 | // the BaseExtractGuidedSectionLib. Since this is before library contructors\r | |
726 | // are called, we must use a loop rather than SetMem.\r | |
727 | //\r | |
728 | Table = (UINT8*)(UINTN)FixedPcdGet64 (PcdGuidedExtractHandlerTableAddress);\r | |
729 | for (Index = 0;\r | |
730 | Index < FixedPcdGet32 (PcdGuidedExtractHandlerTableSize);\r | |
731 | ++Index) {\r | |
732 | Table[Index] = 0;\r | |
733 | }\r | |
bb4aa855 JJ |
734 | \r |
735 | ProcessLibraryConstructorList (NULL, NULL);\r | |
736 | \r | |
c67178b7 | 737 | DEBUG ((EFI_D_INFO,\r |
bb4aa855 JJ |
738 | "SecCoreStartupWithStack(0x%x, 0x%x)\n",\r |
739 | (UINT32)(UINTN)BootFv,\r | |
740 | (UINT32)(UINTN)TopOfCurrentStack\r | |
741 | ));\r | |
742 | \r | |
743 | //\r | |
744 | // Initialize floating point operating environment\r | |
745 | // to be compliant with UEFI spec.\r | |
746 | //\r | |
747 | InitializeFloatingPointUnits ();\r | |
748 | \r | |
749 | //\r | |
750 | // Initialize IDT\r | |
751 | // \r | |
752 | IdtTableInStack.PeiService = NULL;\r | |
753 | for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {\r | |
754 | CopyMem (&IdtTableInStack.IdtTable[Index], &mIdtEntryTemplate, sizeof (mIdtEntryTemplate));\r | |
755 | }\r | |
756 | \r | |
757 | IdtDescriptor.Base = (UINTN)&IdtTableInStack.IdtTable;\r | |
758 | IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);\r | |
759 | \r | |
760 | AsmWriteIdtr (&IdtDescriptor);\r | |
761 | \r | |
b382ede3 JJ |
762 | #if defined (MDE_CPU_X64)\r |
763 | //\r | |
764 | // ASSERT that the Page Tables were set by the reset vector code to\r | |
765 | // the address we expect.\r | |
766 | //\r | |
767 | ASSERT (AsmReadCr3 () == (UINTN) PcdGet32 (PcdOvmfSecPageTablesBase));\r | |
768 | #endif\r | |
769 | \r | |
bb4aa855 JJ |
770 | //\r |
771 | // |-------------| <-- TopOfCurrentStack\r | |
772 | // | Stack | 32k\r | |
773 | // |-------------|\r | |
774 | // | Heap | 32k\r | |
775 | // |-------------| <-- SecCoreData.TemporaryRamBase\r | |
776 | //\r | |
777 | \r | |
7cb6b0e0 JJ |
778 | ASSERT ((UINTN) (PcdGet32 (PcdOvmfSecPeiTempRamBase) +\r |
779 | PcdGet32 (PcdOvmfSecPeiTempRamSize)) ==\r | |
780 | (UINTN) TopOfCurrentStack);\r | |
781 | \r | |
bb4aa855 JJ |
782 | //\r |
783 | // Initialize SEC hand-off state\r | |
784 | //\r | |
785 | SecCoreData.DataSize = sizeof(EFI_SEC_PEI_HAND_OFF);\r | |
786 | \r | |
7cb6b0e0 | 787 | SecCoreData.TemporaryRamSize = (UINTN) PcdGet32 (PcdOvmfSecPeiTempRamSize);\r |
bb4aa855 JJ |
788 | SecCoreData.TemporaryRamBase = (VOID*)((UINT8 *)TopOfCurrentStack - SecCoreData.TemporaryRamSize);\r |
789 | \r | |
790 | SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;\r | |
791 | SecCoreData.PeiTemporaryRamSize = SecCoreData.TemporaryRamSize >> 1;\r | |
792 | \r | |
793 | SecCoreData.StackBase = (UINT8 *)SecCoreData.TemporaryRamBase + SecCoreData.PeiTemporaryRamSize;\r | |
794 | SecCoreData.StackSize = SecCoreData.TemporaryRamSize >> 1;\r | |
795 | \r | |
796 | SecCoreData.BootFirmwareVolumeBase = BootFv;\r | |
797 | SecCoreData.BootFirmwareVolumeSize = (UINTN) BootFv->FvLength;\r | |
798 | \r | |
799 | //\r | |
800 | // Make sure the 8259 is masked before initializing the Debug Agent and the debug timer is enabled\r | |
801 | //\r | |
802 | IoWrite8 (0x21, 0xff);\r | |
803 | IoWrite8 (0xA1, 0xff);\r | |
f3e34b9d MK |
804 | \r |
805 | //\r | |
806 | // Initialize Local APIC Timer hardware and disable Local APIC Timer\r | |
807 | // interrupts before initializing the Debug Agent and the debug timer is\r | |
808 | // enabled.\r | |
809 | //\r | |
810 | InitializeApicTimer (0, MAX_UINT32, TRUE, 5);\r | |
811 | DisableApicTimerInterrupt ();\r | |
bb4aa855 JJ |
812 | \r |
813 | //\r | |
814 | // Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.\r | |
815 | //\r | |
816 | InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);\r | |
817 | }\r | |
818 | \r | |
819 | /**\r | |
820 | Caller provided function to be invoked at the end of InitializeDebugAgent().\r | |
821 | \r | |
822 | Entry point to the C language phase of SEC. After the SEC assembly\r | |
823 | code has initialized some temporary memory and set up the stack,\r | |
824 | the control is transferred to this function.\r | |
825 | \r | |
826 | @param[in] Context The first input parameter of InitializeDebugAgent().\r | |
827 | \r | |
828 | **/\r | |
829 | VOID\r | |
830 | EFIAPI\r | |
831 | SecStartupPhase2(\r | |
832 | IN VOID *Context\r | |
833 | )\r | |
834 | {\r | |
835 | EFI_SEC_PEI_HAND_OFF *SecCoreData;\r | |
836 | EFI_FIRMWARE_VOLUME_HEADER *BootFv;\r | |
837 | EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;\r | |
838 | \r | |
839 | SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;\r | |
840 | \r | |
841 | //\r | |
842 | // Find PEI Core entry point. It will report SEC and Pei Core debug information if remote debug\r | |
843 | // is enabled.\r | |
844 | //\r | |
845 | BootFv = (EFI_FIRMWARE_VOLUME_HEADER *)SecCoreData->BootFirmwareVolumeBase;\r | |
846 | FindAndReportEntryPoints (&BootFv, &PeiCoreEntryPoint);\r | |
847 | SecCoreData->BootFirmwareVolumeBase = BootFv;\r | |
848 | SecCoreData->BootFirmwareVolumeSize = (UINTN) BootFv->FvLength;\r | |
849 | \r | |
850 | //\r | |
851 | // Transfer the control to the PEI core\r | |
852 | //\r | |
853 | (*PeiCoreEntryPoint) (SecCoreData, (EFI_PEI_PPI_DESCRIPTOR *)&mPrivateDispatchTable);\r | |
854 | \r | |
855 | //\r | |
856 | // If we get here then the PEI Core returned, which is not recoverable.\r | |
857 | //\r | |
858 | ASSERT (FALSE);\r | |
859 | CpuDeadLoop ();\r | |
860 | }\r | |
861 | \r | |
862 | EFI_STATUS\r | |
863 | EFIAPI\r | |
864 | TemporaryRamMigration (\r | |
865 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
866 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,\r | |
867 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,\r | |
868 | IN UINTN CopySize\r | |
869 | )\r | |
870 | {\r | |
871 | IA32_DESCRIPTOR IdtDescriptor;\r | |
872 | VOID *OldHeap;\r | |
873 | VOID *NewHeap;\r | |
874 | VOID *OldStack;\r | |
875 | VOID *NewStack;\r | |
876 | DEBUG_AGENT_CONTEXT_POSTMEM_SEC DebugAgentContext;\r | |
877 | BOOLEAN OldStatus;\r | |
878 | BASE_LIBRARY_JUMP_BUFFER JumpBuffer;\r | |
879 | \r | |
c67178b7 | 880 | DEBUG ((EFI_D_INFO,\r |
6394c35a LE |
881 | "TemporaryRamMigration(0x%Lx, 0x%Lx, 0x%Lx)\n",\r |
882 | TemporaryMemoryBase,\r | |
883 | PermanentMemoryBase,\r | |
884 | (UINT64)CopySize\r | |
c67178b7 | 885 | ));\r |
bb4aa855 JJ |
886 | \r |
887 | OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r | |
888 | NewHeap = (VOID*)((UINTN)PermanentMemoryBase + (CopySize >> 1));\r | |
889 | \r | |
890 | OldStack = (VOID*)((UINTN)TemporaryMemoryBase + (CopySize >> 1));\r | |
891 | NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r | |
892 | \r | |
893 | DebugAgentContext.HeapMigrateOffset = (UINTN)NewHeap - (UINTN)OldHeap;\r | |
894 | DebugAgentContext.StackMigrateOffset = (UINTN)NewStack - (UINTN)OldStack;\r | |
895 | \r | |
896 | OldStatus = SaveAndSetDebugTimerInterrupt (FALSE);\r | |
897 | InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, (VOID *) &DebugAgentContext, NULL);\r | |
898 | \r | |
899 | //\r | |
900 | // Migrate Heap\r | |
901 | //\r | |
902 | CopyMem (NewHeap, OldHeap, CopySize >> 1);\r | |
903 | \r | |
904 | //\r | |
905 | // Migrate Stack\r | |
906 | //\r | |
907 | CopyMem (NewStack, OldStack, CopySize >> 1);\r | |
908 | \r | |
909 | //\r | |
910 | // Rebase IDT table in permanent memory\r | |
911 | //\r | |
912 | AsmReadIdtr (&IdtDescriptor);\r | |
913 | IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;\r | |
914 | \r | |
915 | AsmWriteIdtr (&IdtDescriptor);\r | |
916 | \r | |
917 | //\r | |
918 | // Use SetJump()/LongJump() to switch to a new stack.\r | |
919 | // \r | |
920 | if (SetJump (&JumpBuffer) == 0) {\r | |
921 | #if defined (MDE_CPU_IA32)\r | |
922 | JumpBuffer.Esp = JumpBuffer.Esp + DebugAgentContext.StackMigrateOffset;\r | |
923 | #endif \r | |
924 | #if defined (MDE_CPU_X64)\r | |
925 | JumpBuffer.Rsp = JumpBuffer.Rsp + DebugAgentContext.StackMigrateOffset;\r | |
926 | #endif \r | |
927 | LongJump (&JumpBuffer, (UINTN)-1);\r | |
928 | }\r | |
929 | \r | |
930 | SaveAndSetDebugTimerInterrupt (OldStatus);\r | |
931 | \r | |
932 | return EFI_SUCCESS;\r | |
933 | }\r | |
934 | \r |