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717fb604 JY |
1 | /** @file\r |
2 | \r | |
6e601a41 | 3 | Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>\r |
717fb604 JY |
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 | **/\r | |
13 | \r | |
14 | #include "PiSmmCpuDxeSmm.h"\r | |
15 | \r | |
ac6613db JY |
16 | //\r |
17 | // attributes for reserved memory before it is promoted to system memory\r | |
18 | //\r | |
19 | #define EFI_MEMORY_PRESENT 0x0100000000000000ULL\r | |
20 | #define EFI_MEMORY_INITIALIZED 0x0200000000000000ULL\r | |
21 | #define EFI_MEMORY_TESTED 0x0400000000000000ULL\r | |
22 | \r | |
717fb604 JY |
23 | #define NEXT_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \\r |
24 | ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) + (Size)))\r | |
25 | \r | |
d2fc7711 JY |
26 | #define PREVIOUS_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \\r |
27 | ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) - (Size)))\r | |
28 | \r | |
29 | EFI_MEMORY_DESCRIPTOR *mUefiMemoryMap;\r | |
30 | UINTN mUefiMemoryMapSize;\r | |
31 | UINTN mUefiDescriptorSize;\r | |
32 | \r | |
ac6613db JY |
33 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR *mGcdMemSpace = NULL;\r |
34 | UINTN mGcdMemNumberOfDesc = 0;\r | |
35 | \r | |
717fb604 JY |
36 | PAGE_ATTRIBUTE_TABLE mPageAttributeTable[] = {\r |
37 | {Page4K, SIZE_4KB, PAGING_4K_ADDRESS_MASK_64},\r | |
38 | {Page2M, SIZE_2MB, PAGING_2M_ADDRESS_MASK_64},\r | |
39 | {Page1G, SIZE_1GB, PAGING_1G_ADDRESS_MASK_64},\r | |
40 | };\r | |
41 | \r | |
42 | /**\r | |
43 | Return page table base.\r | |
44 | \r | |
45 | @return page table base.\r | |
46 | **/\r | |
47 | UINTN\r | |
48 | GetPageTableBase (\r | |
49 | VOID\r | |
50 | )\r | |
51 | {\r | |
52 | return (AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);\r | |
53 | }\r | |
54 | \r | |
55 | /**\r | |
56 | Return length according to page attributes.\r | |
57 | \r | |
58 | @param[in] PageAttributes The page attribute of the page entry.\r | |
59 | \r | |
60 | @return The length of page entry.\r | |
61 | **/\r | |
62 | UINTN\r | |
63 | PageAttributeToLength (\r | |
64 | IN PAGE_ATTRIBUTE PageAttribute\r | |
65 | )\r | |
66 | {\r | |
67 | UINTN Index;\r | |
68 | for (Index = 0; Index < sizeof(mPageAttributeTable)/sizeof(mPageAttributeTable[0]); Index++) {\r | |
69 | if (PageAttribute == mPageAttributeTable[Index].Attribute) {\r | |
70 | return (UINTN)mPageAttributeTable[Index].Length;\r | |
71 | }\r | |
72 | }\r | |
73 | return 0;\r | |
74 | }\r | |
75 | \r | |
76 | /**\r | |
77 | Return address mask according to page attributes.\r | |
78 | \r | |
79 | @param[in] PageAttributes The page attribute of the page entry.\r | |
80 | \r | |
81 | @return The address mask of page entry.\r | |
82 | **/\r | |
83 | UINTN\r | |
84 | PageAttributeToMask (\r | |
85 | IN PAGE_ATTRIBUTE PageAttribute\r | |
86 | )\r | |
87 | {\r | |
88 | UINTN Index;\r | |
89 | for (Index = 0; Index < sizeof(mPageAttributeTable)/sizeof(mPageAttributeTable[0]); Index++) {\r | |
90 | if (PageAttribute == mPageAttributeTable[Index].Attribute) {\r | |
91 | return (UINTN)mPageAttributeTable[Index].AddressMask;\r | |
92 | }\r | |
93 | }\r | |
94 | return 0;\r | |
95 | }\r | |
96 | \r | |
97 | /**\r | |
98 | Return page table entry to match the address.\r | |
99 | \r | |
100 | @param[in] Address The address to be checked.\r | |
101 | @param[out] PageAttributes The page attribute of the page entry.\r | |
102 | \r | |
103 | @return The page entry.\r | |
104 | **/\r | |
105 | VOID *\r | |
106 | GetPageTableEntry (\r | |
107 | IN PHYSICAL_ADDRESS Address,\r | |
108 | OUT PAGE_ATTRIBUTE *PageAttribute\r | |
109 | )\r | |
110 | {\r | |
111 | UINTN Index1;\r | |
112 | UINTN Index2;\r | |
113 | UINTN Index3;\r | |
114 | UINTN Index4;\r | |
115 | UINT64 *L1PageTable;\r | |
116 | UINT64 *L2PageTable;\r | |
117 | UINT64 *L3PageTable;\r | |
118 | UINT64 *L4PageTable;\r | |
119 | \r | |
120 | Index4 = ((UINTN)RShiftU64 (Address, 39)) & PAGING_PAE_INDEX_MASK;\r | |
121 | Index3 = ((UINTN)Address >> 30) & PAGING_PAE_INDEX_MASK;\r | |
122 | Index2 = ((UINTN)Address >> 21) & PAGING_PAE_INDEX_MASK;\r | |
123 | Index1 = ((UINTN)Address >> 12) & PAGING_PAE_INDEX_MASK;\r | |
124 | \r | |
125 | if (sizeof(UINTN) == sizeof(UINT64)) {\r | |
126 | L4PageTable = (UINT64 *)GetPageTableBase ();\r | |
127 | if (L4PageTable[Index4] == 0) {\r | |
128 | *PageAttribute = PageNone;\r | |
129 | return NULL;\r | |
130 | }\r | |
131 | \r | |
241f9149 | 132 | L3PageTable = (UINT64 *)(UINTN)(L4PageTable[Index4] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r |
717fb604 JY |
133 | } else {\r |
134 | L3PageTable = (UINT64 *)GetPageTableBase ();\r | |
135 | }\r | |
136 | if (L3PageTable[Index3] == 0) {\r | |
137 | *PageAttribute = PageNone;\r | |
138 | return NULL;\r | |
139 | }\r | |
140 | if ((L3PageTable[Index3] & IA32_PG_PS) != 0) {\r | |
141 | // 1G\r | |
142 | *PageAttribute = Page1G;\r | |
143 | return &L3PageTable[Index3];\r | |
144 | }\r | |
145 | \r | |
241f9149 | 146 | L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r |
717fb604 JY |
147 | if (L2PageTable[Index2] == 0) {\r |
148 | *PageAttribute = PageNone;\r | |
149 | return NULL;\r | |
150 | }\r | |
151 | if ((L2PageTable[Index2] & IA32_PG_PS) != 0) {\r | |
152 | // 2M\r | |
153 | *PageAttribute = Page2M;\r | |
154 | return &L2PageTable[Index2];\r | |
155 | }\r | |
156 | \r | |
157 | // 4k\r | |
241f9149 | 158 | L1PageTable = (UINT64 *)(UINTN)(L2PageTable[Index2] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r |
717fb604 JY |
159 | if ((L1PageTable[Index1] == 0) && (Address != 0)) {\r |
160 | *PageAttribute = PageNone;\r | |
161 | return NULL;\r | |
162 | }\r | |
163 | *PageAttribute = Page4K;\r | |
164 | return &L1PageTable[Index1];\r | |
165 | }\r | |
166 | \r | |
167 | /**\r | |
168 | Return memory attributes of page entry.\r | |
169 | \r | |
170 | @param[in] PageEntry The page entry.\r | |
171 | \r | |
172 | @return Memory attributes of page entry.\r | |
173 | **/\r | |
174 | UINT64\r | |
175 | GetAttributesFromPageEntry (\r | |
176 | IN UINT64 *PageEntry\r | |
177 | )\r | |
178 | {\r | |
179 | UINT64 Attributes;\r | |
180 | Attributes = 0;\r | |
181 | if ((*PageEntry & IA32_PG_P) == 0) {\r | |
182 | Attributes |= EFI_MEMORY_RP;\r | |
183 | }\r | |
184 | if ((*PageEntry & IA32_PG_RW) == 0) {\r | |
185 | Attributes |= EFI_MEMORY_RO;\r | |
186 | }\r | |
187 | if ((*PageEntry & IA32_PG_NX) != 0) {\r | |
188 | Attributes |= EFI_MEMORY_XP;\r | |
189 | }\r | |
190 | return Attributes;\r | |
191 | }\r | |
192 | \r | |
193 | /**\r | |
194 | Modify memory attributes of page entry.\r | |
195 | \r | |
196 | @param[in] PageEntry The page entry.\r | |
197 | @param[in] Attributes The bit mask of attributes to modify for the memory region.\r | |
198 | @param[in] IsSet TRUE means to set attributes. FALSE means to clear attributes.\r | |
199 | @param[out] IsModified TRUE means page table modified. FALSE means page table not modified.\r | |
200 | **/\r | |
201 | VOID\r | |
202 | ConvertPageEntryAttribute (\r | |
203 | IN UINT64 *PageEntry,\r | |
204 | IN UINT64 Attributes,\r | |
205 | IN BOOLEAN IsSet,\r | |
206 | OUT BOOLEAN *IsModified\r | |
207 | )\r | |
208 | {\r | |
209 | UINT64 CurrentPageEntry;\r | |
210 | UINT64 NewPageEntry;\r | |
211 | \r | |
212 | CurrentPageEntry = *PageEntry;\r | |
213 | NewPageEntry = CurrentPageEntry;\r | |
214 | if ((Attributes & EFI_MEMORY_RP) != 0) {\r | |
215 | if (IsSet) {\r | |
216 | NewPageEntry &= ~(UINT64)IA32_PG_P;\r | |
217 | } else {\r | |
218 | NewPageEntry |= IA32_PG_P;\r | |
219 | }\r | |
220 | }\r | |
221 | if ((Attributes & EFI_MEMORY_RO) != 0) {\r | |
222 | if (IsSet) {\r | |
223 | NewPageEntry &= ~(UINT64)IA32_PG_RW;\r | |
224 | } else {\r | |
225 | NewPageEntry |= IA32_PG_RW;\r | |
226 | }\r | |
227 | }\r | |
228 | if ((Attributes & EFI_MEMORY_XP) != 0) {\r | |
750ec4ca JY |
229 | if (mXdSupported) {\r |
230 | if (IsSet) {\r | |
231 | NewPageEntry |= IA32_PG_NX;\r | |
232 | } else {\r | |
233 | NewPageEntry &= ~IA32_PG_NX;\r | |
234 | }\r | |
717fb604 JY |
235 | }\r |
236 | }\r | |
237 | *PageEntry = NewPageEntry;\r | |
238 | if (CurrentPageEntry != NewPageEntry) {\r | |
239 | *IsModified = TRUE;\r | |
240 | DEBUG ((DEBUG_VERBOSE, "ConvertPageEntryAttribute 0x%lx", CurrentPageEntry));\r | |
241 | DEBUG ((DEBUG_VERBOSE, "->0x%lx\n", NewPageEntry));\r | |
242 | } else {\r | |
243 | *IsModified = FALSE;\r | |
244 | }\r | |
245 | }\r | |
246 | \r | |
247 | /**\r | |
248 | This function returns if there is need to split page entry.\r | |
249 | \r | |
250 | @param[in] BaseAddress The base address to be checked.\r | |
251 | @param[in] Length The length to be checked.\r | |
252 | @param[in] PageEntry The page entry to be checked.\r | |
253 | @param[in] PageAttribute The page attribute of the page entry.\r | |
254 | \r | |
255 | @retval SplitAttributes on if there is need to split page entry.\r | |
256 | **/\r | |
257 | PAGE_ATTRIBUTE\r | |
258 | NeedSplitPage (\r | |
259 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
260 | IN UINT64 Length,\r | |
261 | IN UINT64 *PageEntry,\r | |
262 | IN PAGE_ATTRIBUTE PageAttribute\r | |
263 | )\r | |
264 | {\r | |
265 | UINT64 PageEntryLength;\r | |
266 | \r | |
267 | PageEntryLength = PageAttributeToLength (PageAttribute);\r | |
268 | \r | |
269 | if (((BaseAddress & (PageEntryLength - 1)) == 0) && (Length >= PageEntryLength)) {\r | |
270 | return PageNone;\r | |
271 | }\r | |
272 | \r | |
273 | if (((BaseAddress & PAGING_2M_MASK) != 0) || (Length < SIZE_2MB)) {\r | |
274 | return Page4K;\r | |
275 | }\r | |
276 | \r | |
277 | return Page2M;\r | |
278 | }\r | |
279 | \r | |
280 | /**\r | |
281 | This function splits one page entry to small page entries.\r | |
282 | \r | |
283 | @param[in] PageEntry The page entry to be splitted.\r | |
284 | @param[in] PageAttribute The page attribute of the page entry.\r | |
285 | @param[in] SplitAttribute How to split the page entry.\r | |
286 | \r | |
287 | @retval RETURN_SUCCESS The page entry is splitted.\r | |
288 | @retval RETURN_UNSUPPORTED The page entry does not support to be splitted.\r | |
289 | @retval RETURN_OUT_OF_RESOURCES No resource to split page entry.\r | |
290 | **/\r | |
291 | RETURN_STATUS\r | |
292 | SplitPage (\r | |
293 | IN UINT64 *PageEntry,\r | |
294 | IN PAGE_ATTRIBUTE PageAttribute,\r | |
295 | IN PAGE_ATTRIBUTE SplitAttribute\r | |
296 | )\r | |
297 | {\r | |
298 | UINT64 BaseAddress;\r | |
299 | UINT64 *NewPageEntry;\r | |
300 | UINTN Index;\r | |
301 | \r | |
302 | ASSERT (PageAttribute == Page2M || PageAttribute == Page1G);\r | |
303 | \r | |
304 | if (PageAttribute == Page2M) {\r | |
305 | //\r | |
306 | // Split 2M to 4K\r | |
307 | //\r | |
308 | ASSERT (SplitAttribute == Page4K);\r | |
309 | if (SplitAttribute == Page4K) {\r | |
310 | NewPageEntry = AllocatePageTableMemory (1);\r | |
311 | DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));\r | |
312 | if (NewPageEntry == NULL) {\r | |
313 | return RETURN_OUT_OF_RESOURCES;\r | |
314 | }\r | |
315 | BaseAddress = *PageEntry & PAGING_2M_ADDRESS_MASK_64;\r | |
316 | for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {\r | |
241f9149 | 317 | NewPageEntry[Index] = (BaseAddress + SIZE_4KB * Index) | mAddressEncMask | ((*PageEntry) & PAGE_PROGATE_BITS);\r |
717fb604 | 318 | }\r |
241f9149 | 319 | (*PageEntry) = (UINT64)(UINTN)NewPageEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;\r |
717fb604 JY |
320 | return RETURN_SUCCESS;\r |
321 | } else {\r | |
322 | return RETURN_UNSUPPORTED;\r | |
323 | }\r | |
324 | } else if (PageAttribute == Page1G) {\r | |
325 | //\r | |
326 | // Split 1G to 2M\r | |
327 | // No need support 1G->4K directly, we should use 1G->2M, then 2M->4K to get more compact page table.\r | |
328 | //\r | |
329 | ASSERT (SplitAttribute == Page2M || SplitAttribute == Page4K);\r | |
330 | if ((SplitAttribute == Page2M || SplitAttribute == Page4K)) {\r | |
331 | NewPageEntry = AllocatePageTableMemory (1);\r | |
332 | DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));\r | |
333 | if (NewPageEntry == NULL) {\r | |
334 | return RETURN_OUT_OF_RESOURCES;\r | |
335 | }\r | |
336 | BaseAddress = *PageEntry & PAGING_1G_ADDRESS_MASK_64;\r | |
337 | for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {\r | |
241f9149 | 338 | NewPageEntry[Index] = (BaseAddress + SIZE_2MB * Index) | mAddressEncMask | IA32_PG_PS | ((*PageEntry) & PAGE_PROGATE_BITS);\r |
717fb604 | 339 | }\r |
241f9149 | 340 | (*PageEntry) = (UINT64)(UINTN)NewPageEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;\r |
717fb604 JY |
341 | return RETURN_SUCCESS;\r |
342 | } else {\r | |
343 | return RETURN_UNSUPPORTED;\r | |
344 | }\r | |
345 | } else {\r | |
346 | return RETURN_UNSUPPORTED;\r | |
347 | }\r | |
348 | }\r | |
349 | \r | |
350 | /**\r | |
351 | This function modifies the page attributes for the memory region specified by BaseAddress and\r | |
352 | Length from their current attributes to the attributes specified by Attributes.\r | |
353 | \r | |
354 | Caller should make sure BaseAddress and Length is at page boundary.\r | |
355 | \r | |
356 | @param[in] BaseAddress The physical address that is the start address of a memory region.\r | |
357 | @param[in] Length The size in bytes of the memory region.\r | |
358 | @param[in] Attributes The bit mask of attributes to modify for the memory region.\r | |
359 | @param[in] IsSet TRUE means to set attributes. FALSE means to clear attributes.\r | |
360 | @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r | |
361 | @param[out] IsModified TRUE means page table modified. FALSE means page table not modified.\r | |
362 | \r | |
363 | @retval RETURN_SUCCESS The attributes were modified for the memory region.\r | |
364 | @retval RETURN_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
365 | BaseAddress and Length cannot be modified.\r | |
366 | @retval RETURN_INVALID_PARAMETER Length is zero.\r | |
367 | Attributes specified an illegal combination of attributes that\r | |
368 | cannot be set together.\r | |
369 | @retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
370 | the memory resource range.\r | |
371 | @retval RETURN_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
372 | resource range specified by BaseAddress and Length.\r | |
373 | The bit mask of attributes is not support for the memory resource\r | |
374 | range specified by BaseAddress and Length.\r | |
375 | **/\r | |
376 | RETURN_STATUS\r | |
377 | EFIAPI\r | |
378 | ConvertMemoryPageAttributes (\r | |
379 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
380 | IN UINT64 Length,\r | |
381 | IN UINT64 Attributes,\r | |
382 | IN BOOLEAN IsSet,\r | |
383 | OUT BOOLEAN *IsSplitted, OPTIONAL\r | |
384 | OUT BOOLEAN *IsModified OPTIONAL\r | |
385 | )\r | |
386 | {\r | |
387 | UINT64 *PageEntry;\r | |
388 | PAGE_ATTRIBUTE PageAttribute;\r | |
389 | UINTN PageEntryLength;\r | |
390 | PAGE_ATTRIBUTE SplitAttribute;\r | |
391 | RETURN_STATUS Status;\r | |
392 | BOOLEAN IsEntryModified;\r | |
714c2603 | 393 | EFI_PHYSICAL_ADDRESS MaximumSupportMemAddress;\r |
717fb604 JY |
394 | \r |
395 | ASSERT (Attributes != 0);\r | |
396 | ASSERT ((Attributes & ~(EFI_MEMORY_RP | EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0);\r | |
397 | \r | |
398 | ASSERT ((BaseAddress & (SIZE_4KB - 1)) == 0);\r | |
399 | ASSERT ((Length & (SIZE_4KB - 1)) == 0);\r | |
400 | \r | |
401 | if (Length == 0) {\r | |
402 | return RETURN_INVALID_PARAMETER;\r | |
403 | }\r | |
404 | \r | |
714c2603 SZ |
405 | MaximumSupportMemAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, mPhysicalAddressBits) - 1);\r |
406 | if (BaseAddress > MaximumSupportMemAddress) {\r | |
407 | return RETURN_UNSUPPORTED;\r | |
408 | }\r | |
409 | if (Length > MaximumSupportMemAddress) {\r | |
410 | return RETURN_UNSUPPORTED;\r | |
411 | }\r | |
412 | if ((Length != 0) && (BaseAddress > MaximumSupportMemAddress - (Length - 1))) {\r | |
413 | return RETURN_UNSUPPORTED;\r | |
414 | }\r | |
415 | \r | |
717fb604 JY |
416 | // DEBUG ((DEBUG_ERROR, "ConvertMemoryPageAttributes(%x) - %016lx, %016lx, %02lx\n", IsSet, BaseAddress, Length, Attributes));\r |
417 | \r | |
418 | if (IsSplitted != NULL) {\r | |
419 | *IsSplitted = FALSE;\r | |
420 | }\r | |
421 | if (IsModified != NULL) {\r | |
422 | *IsModified = FALSE;\r | |
423 | }\r | |
424 | \r | |
425 | //\r | |
426 | // Below logic is to check 2M/4K page to make sure we donot waist memory.\r | |
427 | //\r | |
428 | while (Length != 0) {\r | |
429 | PageEntry = GetPageTableEntry (BaseAddress, &PageAttribute);\r | |
430 | if (PageEntry == NULL) {\r | |
431 | return RETURN_UNSUPPORTED;\r | |
432 | }\r | |
433 | PageEntryLength = PageAttributeToLength (PageAttribute);\r | |
434 | SplitAttribute = NeedSplitPage (BaseAddress, Length, PageEntry, PageAttribute);\r | |
435 | if (SplitAttribute == PageNone) {\r | |
436 | ConvertPageEntryAttribute (PageEntry, Attributes, IsSet, &IsEntryModified);\r | |
437 | if (IsEntryModified) {\r | |
438 | if (IsModified != NULL) {\r | |
439 | *IsModified = TRUE;\r | |
440 | }\r | |
441 | }\r | |
442 | //\r | |
443 | // Convert success, move to next\r | |
444 | //\r | |
445 | BaseAddress += PageEntryLength;\r | |
446 | Length -= PageEntryLength;\r | |
447 | } else {\r | |
448 | Status = SplitPage (PageEntry, PageAttribute, SplitAttribute);\r | |
449 | if (RETURN_ERROR (Status)) {\r | |
450 | return RETURN_UNSUPPORTED;\r | |
451 | }\r | |
452 | if (IsSplitted != NULL) {\r | |
453 | *IsSplitted = TRUE;\r | |
454 | }\r | |
455 | if (IsModified != NULL) {\r | |
456 | *IsModified = TRUE;\r | |
457 | }\r | |
458 | //\r | |
459 | // Just split current page\r | |
460 | // Convert success in next around\r | |
461 | //\r | |
462 | }\r | |
463 | }\r | |
464 | \r | |
465 | return RETURN_SUCCESS;\r | |
466 | }\r | |
467 | \r | |
468 | /**\r | |
469 | FlushTlb on current processor.\r | |
470 | \r | |
471 | @param[in,out] Buffer Pointer to private data buffer.\r | |
472 | **/\r | |
473 | VOID\r | |
474 | EFIAPI\r | |
475 | FlushTlbOnCurrentProcessor (\r | |
476 | IN OUT VOID *Buffer\r | |
477 | )\r | |
478 | {\r | |
479 | CpuFlushTlb ();\r | |
480 | }\r | |
481 | \r | |
482 | /**\r | |
483 | FlushTlb for all processors.\r | |
484 | **/\r | |
485 | VOID\r | |
486 | FlushTlbForAll (\r | |
487 | VOID\r | |
488 | )\r | |
489 | {\r | |
490 | UINTN Index;\r | |
491 | \r | |
492 | FlushTlbOnCurrentProcessor (NULL);\r | |
493 | \r | |
494 | for (Index = 0; Index < gSmst->NumberOfCpus; Index++) {\r | |
495 | if (Index != gSmst->CurrentlyExecutingCpu) {\r | |
496 | // Force to start up AP in blocking mode,\r | |
497 | SmmBlockingStartupThisAp (FlushTlbOnCurrentProcessor, Index, NULL);\r | |
498 | // Do not check return status, because AP might not be present in some corner cases.\r | |
499 | }\r | |
500 | }\r | |
501 | }\r | |
502 | \r | |
503 | /**\r | |
504 | This function sets the attributes for the memory region specified by BaseAddress and\r | |
505 | Length from their current attributes to the attributes specified by Attributes.\r | |
506 | \r | |
507 | @param[in] BaseAddress The physical address that is the start address of a memory region.\r | |
508 | @param[in] Length The size in bytes of the memory region.\r | |
509 | @param[in] Attributes The bit mask of attributes to set for the memory region.\r | |
510 | @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r | |
511 | \r | |
512 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
513 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
514 | BaseAddress and Length cannot be modified.\r | |
515 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
516 | Attributes specified an illegal combination of attributes that\r | |
517 | cannot be set together.\r | |
518 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
519 | the memory resource range.\r | |
520 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
521 | resource range specified by BaseAddress and Length.\r | |
522 | The bit mask of attributes is not support for the memory resource\r | |
523 | range specified by BaseAddress and Length.\r | |
524 | \r | |
525 | **/\r | |
526 | EFI_STATUS\r | |
527 | EFIAPI\r | |
528 | SmmSetMemoryAttributesEx (\r | |
529 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
530 | IN UINT64 Length,\r | |
531 | IN UINT64 Attributes,\r | |
532 | OUT BOOLEAN *IsSplitted OPTIONAL\r | |
533 | )\r | |
534 | {\r | |
535 | EFI_STATUS Status;\r | |
536 | BOOLEAN IsModified;\r | |
537 | \r | |
538 | Status = ConvertMemoryPageAttributes (BaseAddress, Length, Attributes, TRUE, IsSplitted, &IsModified);\r | |
539 | if (!EFI_ERROR(Status)) {\r | |
540 | if (IsModified) {\r | |
541 | //\r | |
542 | // Flush TLB as last step\r | |
543 | //\r | |
544 | FlushTlbForAll();\r | |
545 | }\r | |
546 | }\r | |
547 | \r | |
548 | return Status;\r | |
549 | }\r | |
550 | \r | |
551 | /**\r | |
552 | This function clears the attributes for the memory region specified by BaseAddress and\r | |
553 | Length from their current attributes to the attributes specified by Attributes.\r | |
554 | \r | |
555 | @param[in] BaseAddress The physical address that is the start address of a memory region.\r | |
556 | @param[in] Length The size in bytes of the memory region.\r | |
557 | @param[in] Attributes The bit mask of attributes to clear for the memory region.\r | |
558 | @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r | |
559 | \r | |
560 | @retval EFI_SUCCESS The attributes were cleared for the memory region.\r | |
561 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
562 | BaseAddress and Length cannot be modified.\r | |
563 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
564 | Attributes specified an illegal combination of attributes that\r | |
aae02dcc | 565 | cannot be cleared together.\r |
717fb604 JY |
566 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r |
567 | the memory resource range.\r | |
568 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
569 | resource range specified by BaseAddress and Length.\r | |
aae02dcc | 570 | The bit mask of attributes is not supported for the memory resource\r |
717fb604 JY |
571 | range specified by BaseAddress and Length.\r |
572 | \r | |
573 | **/\r | |
574 | EFI_STATUS\r | |
575 | EFIAPI\r | |
576 | SmmClearMemoryAttributesEx (\r | |
577 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
578 | IN UINT64 Length,\r | |
579 | IN UINT64 Attributes,\r | |
580 | OUT BOOLEAN *IsSplitted OPTIONAL\r | |
581 | )\r | |
582 | {\r | |
583 | EFI_STATUS Status;\r | |
584 | BOOLEAN IsModified;\r | |
585 | \r | |
586 | Status = ConvertMemoryPageAttributes (BaseAddress, Length, Attributes, FALSE, IsSplitted, &IsModified);\r | |
587 | if (!EFI_ERROR(Status)) {\r | |
588 | if (IsModified) {\r | |
589 | //\r | |
590 | // Flush TLB as last step\r | |
591 | //\r | |
592 | FlushTlbForAll();\r | |
593 | }\r | |
594 | }\r | |
595 | \r | |
596 | return Status;\r | |
597 | }\r | |
598 | \r | |
599 | /**\r | |
600 | This function sets the attributes for the memory region specified by BaseAddress and\r | |
601 | Length from their current attributes to the attributes specified by Attributes.\r | |
602 | \r | |
603 | @param[in] BaseAddress The physical address that is the start address of a memory region.\r | |
604 | @param[in] Length The size in bytes of the memory region.\r | |
605 | @param[in] Attributes The bit mask of attributes to set for the memory region.\r | |
606 | \r | |
607 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
608 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
609 | BaseAddress and Length cannot be modified.\r | |
610 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
611 | Attributes specified an illegal combination of attributes that\r | |
612 | cannot be set together.\r | |
613 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
614 | the memory resource range.\r | |
615 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
616 | resource range specified by BaseAddress and Length.\r | |
aae02dcc | 617 | The bit mask of attributes is not supported for the memory resource\r |
717fb604 JY |
618 | range specified by BaseAddress and Length.\r |
619 | \r | |
620 | **/\r | |
621 | EFI_STATUS\r | |
622 | EFIAPI\r | |
623 | SmmSetMemoryAttributes (\r | |
624 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
625 | IN UINT64 Length,\r | |
626 | IN UINT64 Attributes\r | |
627 | )\r | |
628 | {\r | |
629 | return SmmSetMemoryAttributesEx (BaseAddress, Length, Attributes, NULL);\r | |
630 | }\r | |
631 | \r | |
632 | /**\r | |
633 | This function clears the attributes for the memory region specified by BaseAddress and\r | |
634 | Length from their current attributes to the attributes specified by Attributes.\r | |
635 | \r | |
636 | @param[in] BaseAddress The physical address that is the start address of a memory region.\r | |
637 | @param[in] Length The size in bytes of the memory region.\r | |
638 | @param[in] Attributes The bit mask of attributes to clear for the memory region.\r | |
639 | \r | |
640 | @retval EFI_SUCCESS The attributes were cleared for the memory region.\r | |
641 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
642 | BaseAddress and Length cannot be modified.\r | |
643 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
644 | Attributes specified an illegal combination of attributes that\r | |
aae02dcc | 645 | cannot be cleared together.\r |
717fb604 JY |
646 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r |
647 | the memory resource range.\r | |
648 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
649 | resource range specified by BaseAddress and Length.\r | |
aae02dcc | 650 | The bit mask of attributes is not supported for the memory resource\r |
717fb604 JY |
651 | range specified by BaseAddress and Length.\r |
652 | \r | |
653 | **/\r | |
654 | EFI_STATUS\r | |
655 | EFIAPI\r | |
656 | SmmClearMemoryAttributes (\r | |
657 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
658 | IN UINT64 Length,\r | |
659 | IN UINT64 Attributes\r | |
660 | )\r | |
661 | {\r | |
662 | return SmmClearMemoryAttributesEx (BaseAddress, Length, Attributes, NULL);\r | |
663 | }\r | |
664 | \r | |
665 | \r | |
666 | \r | |
667 | /**\r | |
668 | Retrieves a pointer to the system configuration table from the SMM System Table\r | |
669 | based on a specified GUID.\r | |
670 | \r | |
671 | @param[in] TableGuid The pointer to table's GUID type.\r | |
672 | @param[out] Table The pointer to the table associated with TableGuid in the EFI System Table.\r | |
673 | \r | |
674 | @retval EFI_SUCCESS A configuration table matching TableGuid was found.\r | |
675 | @retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found.\r | |
676 | \r | |
677 | **/\r | |
678 | EFI_STATUS\r | |
679 | EFIAPI\r | |
680 | SmmGetSystemConfigurationTable (\r | |
681 | IN EFI_GUID *TableGuid,\r | |
682 | OUT VOID **Table\r | |
683 | )\r | |
684 | {\r | |
685 | UINTN Index;\r | |
686 | \r | |
687 | ASSERT (TableGuid != NULL);\r | |
688 | ASSERT (Table != NULL);\r | |
689 | \r | |
690 | *Table = NULL;\r | |
691 | for (Index = 0; Index < gSmst->NumberOfTableEntries; Index++) {\r | |
692 | if (CompareGuid (TableGuid, &(gSmst->SmmConfigurationTable[Index].VendorGuid))) {\r | |
693 | *Table = gSmst->SmmConfigurationTable[Index].VendorTable;\r | |
694 | return EFI_SUCCESS;\r | |
695 | }\r | |
696 | }\r | |
697 | \r | |
698 | return EFI_NOT_FOUND;\r | |
699 | }\r | |
700 | \r | |
701 | /**\r | |
702 | This function sets SMM save state buffer to be RW and XP.\r | |
703 | **/\r | |
704 | VOID\r | |
705 | PatchSmmSaveStateMap (\r | |
706 | VOID\r | |
707 | )\r | |
708 | {\r | |
709 | UINTN Index;\r | |
710 | UINTN TileCodeSize;\r | |
711 | UINTN TileDataSize;\r | |
712 | UINTN TileSize;\r | |
713 | \r | |
714 | TileCodeSize = GetSmiHandlerSize ();\r | |
715 | TileCodeSize = ALIGN_VALUE(TileCodeSize, SIZE_4KB);\r | |
f12367a0 | 716 | TileDataSize = (SMRAM_SAVE_STATE_MAP_OFFSET - SMM_PSD_OFFSET) + sizeof (SMRAM_SAVE_STATE_MAP);\r |
717fb604 JY |
717 | TileDataSize = ALIGN_VALUE(TileDataSize, SIZE_4KB);\r |
718 | TileSize = TileDataSize + TileCodeSize - 1;\r | |
719 | TileSize = 2 * GetPowerOfTwo32 ((UINT32)TileSize);\r | |
720 | \r | |
721 | DEBUG ((DEBUG_INFO, "PatchSmmSaveStateMap:\n"));\r | |
722 | for (Index = 0; Index < mMaxNumberOfCpus - 1; Index++) {\r | |
723 | //\r | |
724 | // Code\r | |
725 | //\r | |
726 | SmmSetMemoryAttributes (\r | |
727 | mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET,\r | |
728 | TileCodeSize,\r | |
729 | EFI_MEMORY_RO\r | |
730 | );\r | |
731 | SmmClearMemoryAttributes (\r | |
732 | mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET,\r | |
733 | TileCodeSize,\r | |
734 | EFI_MEMORY_XP\r | |
735 | );\r | |
736 | \r | |
737 | //\r | |
738 | // Data\r | |
739 | //\r | |
740 | SmmClearMemoryAttributes (\r | |
741 | mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET + TileCodeSize,\r | |
742 | TileSize - TileCodeSize,\r | |
743 | EFI_MEMORY_RO\r | |
744 | );\r | |
745 | SmmSetMemoryAttributes (\r | |
746 | mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET + TileCodeSize,\r | |
747 | TileSize - TileCodeSize,\r | |
748 | EFI_MEMORY_XP\r | |
749 | );\r | |
750 | }\r | |
751 | \r | |
752 | //\r | |
753 | // Code\r | |
754 | //\r | |
755 | SmmSetMemoryAttributes (\r | |
756 | mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET,\r | |
757 | TileCodeSize,\r | |
758 | EFI_MEMORY_RO\r | |
759 | );\r | |
760 | SmmClearMemoryAttributes (\r | |
761 | mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET,\r | |
762 | TileCodeSize,\r | |
763 | EFI_MEMORY_XP\r | |
764 | );\r | |
765 | \r | |
766 | //\r | |
767 | // Data\r | |
768 | //\r | |
769 | SmmClearMemoryAttributes (\r | |
770 | mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET + TileCodeSize,\r | |
771 | SIZE_32KB - TileCodeSize,\r | |
772 | EFI_MEMORY_RO\r | |
773 | );\r | |
774 | SmmSetMemoryAttributes (\r | |
775 | mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET + TileCodeSize,\r | |
776 | SIZE_32KB - TileCodeSize,\r | |
777 | EFI_MEMORY_XP\r | |
778 | );\r | |
779 | }\r | |
780 | \r | |
6e601a41 SZ |
781 | /**\r |
782 | This function sets GDT/IDT buffer to be RO and XP.\r | |
783 | **/\r | |
784 | VOID\r | |
785 | PatchGdtIdtMap (\r | |
786 | VOID\r | |
787 | )\r | |
788 | {\r | |
789 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
790 | UINTN Size;\r | |
791 | \r | |
792 | //\r | |
793 | // GDT\r | |
794 | //\r | |
795 | DEBUG ((DEBUG_INFO, "PatchGdtIdtMap - GDT:\n"));\r | |
796 | \r | |
797 | BaseAddress = mGdtBuffer;\r | |
798 | Size = ALIGN_VALUE(mGdtBufferSize, SIZE_4KB);\r | |
799 | //\r | |
800 | // The range should have been set to RO\r | |
801 | // if it is allocated with EfiRuntimeServicesCode.\r | |
802 | //\r | |
803 | SmmSetMemoryAttributes (\r | |
804 | BaseAddress,\r | |
805 | Size,\r | |
806 | EFI_MEMORY_XP\r | |
807 | );\r | |
808 | \r | |
809 | //\r | |
810 | // IDT\r | |
811 | //\r | |
812 | DEBUG ((DEBUG_INFO, "PatchGdtIdtMap - IDT:\n"));\r | |
813 | \r | |
814 | BaseAddress = gcSmiIdtr.Base;\r | |
815 | Size = ALIGN_VALUE(gcSmiIdtr.Limit + 1, SIZE_4KB);\r | |
fe90d0d2 SZ |
816 | //\r |
817 | // The range should have been set to RO\r | |
818 | // if it is allocated with EfiRuntimeServicesCode.\r | |
819 | //\r | |
6e601a41 SZ |
820 | SmmSetMemoryAttributes (\r |
821 | BaseAddress,\r | |
822 | Size,\r | |
823 | EFI_MEMORY_XP\r | |
824 | );\r | |
825 | }\r | |
826 | \r | |
717fb604 JY |
827 | /**\r |
828 | This function sets memory attribute according to MemoryAttributesTable.\r | |
829 | **/\r | |
830 | VOID\r | |
831 | SetMemMapAttributes (\r | |
832 | VOID\r | |
833 | )\r | |
834 | {\r | |
835 | EFI_MEMORY_DESCRIPTOR *MemoryMap;\r | |
836 | EFI_MEMORY_DESCRIPTOR *MemoryMapStart;\r | |
837 | UINTN MemoryMapEntryCount;\r | |
838 | UINTN DescriptorSize;\r | |
839 | UINTN Index;\r | |
840 | EDKII_PI_SMM_MEMORY_ATTRIBUTES_TABLE *MemoryAttributesTable;\r | |
841 | \r | |
842 | SmmGetSystemConfigurationTable (&gEdkiiPiSmmMemoryAttributesTableGuid, (VOID **)&MemoryAttributesTable);\r | |
843 | if (MemoryAttributesTable == NULL) {\r | |
844 | DEBUG ((DEBUG_INFO, "MemoryAttributesTable - NULL\n"));\r | |
845 | return ;\r | |
846 | }\r | |
847 | \r | |
848 | DEBUG ((DEBUG_INFO, "MemoryAttributesTable:\n"));\r | |
849 | DEBUG ((DEBUG_INFO, " Version - 0x%08x\n", MemoryAttributesTable->Version));\r | |
850 | DEBUG ((DEBUG_INFO, " NumberOfEntries - 0x%08x\n", MemoryAttributesTable->NumberOfEntries));\r | |
851 | DEBUG ((DEBUG_INFO, " DescriptorSize - 0x%08x\n", MemoryAttributesTable->DescriptorSize));\r | |
852 | \r | |
853 | MemoryMapEntryCount = MemoryAttributesTable->NumberOfEntries;\r | |
854 | DescriptorSize = MemoryAttributesTable->DescriptorSize;\r | |
855 | MemoryMapStart = (EFI_MEMORY_DESCRIPTOR *)(MemoryAttributesTable + 1);\r | |
856 | MemoryMap = MemoryMapStart;\r | |
857 | for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r | |
858 | DEBUG ((DEBUG_INFO, "Entry (0x%x)\n", MemoryMap));\r | |
859 | DEBUG ((DEBUG_INFO, " Type - 0x%x\n", MemoryMap->Type));\r | |
860 | DEBUG ((DEBUG_INFO, " PhysicalStart - 0x%016lx\n", MemoryMap->PhysicalStart));\r | |
861 | DEBUG ((DEBUG_INFO, " VirtualStart - 0x%016lx\n", MemoryMap->VirtualStart));\r | |
862 | DEBUG ((DEBUG_INFO, " NumberOfPages - 0x%016lx\n", MemoryMap->NumberOfPages));\r | |
863 | DEBUG ((DEBUG_INFO, " Attribute - 0x%016lx\n", MemoryMap->Attribute));\r | |
864 | MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);\r | |
865 | }\r | |
866 | \r | |
867 | MemoryMap = MemoryMapStart;\r | |
868 | for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r | |
869 | DEBUG ((DEBUG_VERBOSE, "SetAttribute: Memory Entry - 0x%lx, 0x%x\n", MemoryMap->PhysicalStart, MemoryMap->NumberOfPages));\r | |
870 | switch (MemoryMap->Type) {\r | |
871 | case EfiRuntimeServicesCode:\r | |
872 | SmmSetMemoryAttributes (\r | |
873 | MemoryMap->PhysicalStart,\r | |
874 | EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r | |
875 | EFI_MEMORY_RO\r | |
876 | );\r | |
877 | break;\r | |
878 | case EfiRuntimeServicesData:\r | |
879 | SmmSetMemoryAttributes (\r | |
880 | MemoryMap->PhysicalStart,\r | |
881 | EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r | |
882 | EFI_MEMORY_XP\r | |
883 | );\r | |
884 | break;\r | |
885 | default:\r | |
886 | SmmSetMemoryAttributes (\r | |
887 | MemoryMap->PhysicalStart,\r | |
888 | EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r | |
889 | EFI_MEMORY_XP\r | |
890 | );\r | |
891 | break;\r | |
892 | }\r | |
893 | MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);\r | |
894 | }\r | |
895 | \r | |
896 | PatchSmmSaveStateMap ();\r | |
897 | PatchGdtIdtMap ();\r | |
898 | \r | |
899 | return ;\r | |
900 | }\r | |
d2fc7711 JY |
901 | \r |
902 | /**\r | |
903 | Sort memory map entries based upon PhysicalStart, from low to high.\r | |
904 | \r | |
905 | @param MemoryMap A pointer to the buffer in which firmware places\r | |
906 | the current memory map.\r | |
907 | @param MemoryMapSize Size, in bytes, of the MemoryMap buffer.\r | |
908 | @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.\r | |
909 | **/\r | |
910 | STATIC\r | |
911 | VOID\r | |
912 | SortMemoryMap (\r | |
913 | IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,\r | |
914 | IN UINTN MemoryMapSize,\r | |
915 | IN UINTN DescriptorSize\r | |
916 | )\r | |
917 | {\r | |
918 | EFI_MEMORY_DESCRIPTOR *MemoryMapEntry;\r | |
919 | EFI_MEMORY_DESCRIPTOR *NextMemoryMapEntry;\r | |
920 | EFI_MEMORY_DESCRIPTOR *MemoryMapEnd;\r | |
921 | EFI_MEMORY_DESCRIPTOR TempMemoryMap;\r | |
922 | \r | |
923 | MemoryMapEntry = MemoryMap;\r | |
924 | NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r | |
925 | MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) MemoryMap + MemoryMapSize);\r | |
926 | while (MemoryMapEntry < MemoryMapEnd) {\r | |
927 | while (NextMemoryMapEntry < MemoryMapEnd) {\r | |
928 | if (MemoryMapEntry->PhysicalStart > NextMemoryMapEntry->PhysicalStart) {\r | |
929 | CopyMem (&TempMemoryMap, MemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r | |
930 | CopyMem (MemoryMapEntry, NextMemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r | |
931 | CopyMem (NextMemoryMapEntry, &TempMemoryMap, sizeof(EFI_MEMORY_DESCRIPTOR));\r | |
932 | }\r | |
933 | \r | |
934 | NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r | |
935 | }\r | |
936 | \r | |
937 | MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r | |
938 | NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r | |
939 | }\r | |
940 | }\r | |
941 | \r | |
942 | /**\r | |
943 | Return if a UEFI memory page should be marked as not present in SMM page table.\r | |
944 | If the memory map entries type is\r | |
945 | EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r | |
946 | EfiUnusableMemory, EfiACPIReclaimMemory, return TRUE.\r | |
947 | Or return FALSE.\r | |
948 | \r | |
949 | @param[in] MemoryMap A pointer to the memory descriptor.\r | |
950 | \r | |
951 | @return TRUE The memory described will be marked as not present in SMM page table.\r | |
952 | @return FALSE The memory described will not be marked as not present in SMM page table.\r | |
953 | **/\r | |
954 | BOOLEAN\r | |
955 | IsUefiPageNotPresent (\r | |
956 | IN EFI_MEMORY_DESCRIPTOR *MemoryMap\r | |
957 | )\r | |
958 | {\r | |
959 | switch (MemoryMap->Type) {\r | |
960 | case EfiLoaderCode:\r | |
961 | case EfiLoaderData:\r | |
962 | case EfiBootServicesCode:\r | |
963 | case EfiBootServicesData:\r | |
964 | case EfiConventionalMemory:\r | |
965 | case EfiUnusableMemory:\r | |
966 | case EfiACPIReclaimMemory:\r | |
967 | return TRUE;\r | |
968 | default:\r | |
969 | return FALSE;\r | |
970 | }\r | |
971 | }\r | |
972 | \r | |
973 | /**\r | |
974 | Merge continous memory map entries whose type is\r | |
975 | EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r | |
976 | EfiUnusableMemory, EfiACPIReclaimMemory, because the memory described by\r | |
977 | these entries will be set as NOT present in SMM page table.\r | |
978 | \r | |
979 | @param[in, out] MemoryMap A pointer to the buffer in which firmware places\r | |
980 | the current memory map.\r | |
981 | @param[in, out] MemoryMapSize A pointer to the size, in bytes, of the\r | |
982 | MemoryMap buffer. On input, this is the size of\r | |
983 | the current memory map. On output,\r | |
984 | it is the size of new memory map after merge.\r | |
985 | @param[in] DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.\r | |
986 | **/\r | |
987 | STATIC\r | |
988 | VOID\r | |
989 | MergeMemoryMapForNotPresentEntry (\r | |
990 | IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,\r | |
991 | IN OUT UINTN *MemoryMapSize,\r | |
992 | IN UINTN DescriptorSize\r | |
993 | )\r | |
994 | {\r | |
995 | EFI_MEMORY_DESCRIPTOR *MemoryMapEntry;\r | |
996 | EFI_MEMORY_DESCRIPTOR *MemoryMapEnd;\r | |
997 | UINT64 MemoryBlockLength;\r | |
998 | EFI_MEMORY_DESCRIPTOR *NewMemoryMapEntry;\r | |
999 | EFI_MEMORY_DESCRIPTOR *NextMemoryMapEntry;\r | |
1000 | \r | |
1001 | MemoryMapEntry = MemoryMap;\r | |
1002 | NewMemoryMapEntry = MemoryMap;\r | |
1003 | MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) MemoryMap + *MemoryMapSize);\r | |
1004 | while ((UINTN)MemoryMapEntry < (UINTN)MemoryMapEnd) {\r | |
1005 | CopyMem (NewMemoryMapEntry, MemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r | |
1006 | NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r | |
1007 | \r | |
1008 | do {\r | |
1009 | MemoryBlockLength = (UINT64) (EFI_PAGES_TO_SIZE((UINTN)MemoryMapEntry->NumberOfPages));\r | |
1010 | if (((UINTN)NextMemoryMapEntry < (UINTN)MemoryMapEnd) &&\r | |
1011 | IsUefiPageNotPresent(MemoryMapEntry) && IsUefiPageNotPresent(NextMemoryMapEntry) &&\r | |
1012 | ((MemoryMapEntry->PhysicalStart + MemoryBlockLength) == NextMemoryMapEntry->PhysicalStart)) {\r | |
1013 | MemoryMapEntry->NumberOfPages += NextMemoryMapEntry->NumberOfPages;\r | |
1014 | if (NewMemoryMapEntry != MemoryMapEntry) {\r | |
1015 | NewMemoryMapEntry->NumberOfPages += NextMemoryMapEntry->NumberOfPages;\r | |
1016 | }\r | |
1017 | \r | |
1018 | NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r | |
1019 | continue;\r | |
1020 | } else {\r | |
1021 | MemoryMapEntry = PREVIOUS_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r | |
1022 | break;\r | |
1023 | }\r | |
1024 | } while (TRUE);\r | |
1025 | \r | |
1026 | MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r | |
1027 | NewMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NewMemoryMapEntry, DescriptorSize);\r | |
1028 | }\r | |
1029 | \r | |
1030 | *MemoryMapSize = (UINTN)NewMemoryMapEntry - (UINTN)MemoryMap;\r | |
1031 | \r | |
1032 | return ;\r | |
1033 | }\r | |
1034 | \r | |
ac6613db JY |
1035 | /**\r |
1036 | This function caches the GCD memory map information.\r | |
1037 | **/\r | |
1038 | VOID\r | |
1039 | GetGcdMemoryMap (\r | |
1040 | VOID\r | |
1041 | )\r | |
1042 | {\r | |
1043 | UINTN NumberOfDescriptors;\r | |
1044 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemSpaceMap;\r | |
1045 | EFI_STATUS Status;\r | |
1046 | UINTN Index;\r | |
1047 | \r | |
1048 | Status = gDS->GetMemorySpaceMap (&NumberOfDescriptors, &MemSpaceMap);\r | |
1049 | if (EFI_ERROR (Status)) {\r | |
1050 | return ;\r | |
1051 | }\r | |
1052 | \r | |
1053 | mGcdMemNumberOfDesc = 0;\r | |
1054 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
1055 | if (MemSpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeReserved &&\r | |
1056 | (MemSpaceMap[Index].Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==\r | |
1057 | (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)\r | |
1058 | ) {\r | |
1059 | mGcdMemNumberOfDesc++;\r | |
1060 | }\r | |
1061 | }\r | |
1062 | \r | |
1063 | mGcdMemSpace = AllocateZeroPool (mGcdMemNumberOfDesc * sizeof (EFI_GCD_MEMORY_SPACE_DESCRIPTOR));\r | |
1064 | ASSERT (mGcdMemSpace != NULL);\r | |
1065 | if (mGcdMemSpace == NULL) {\r | |
1066 | mGcdMemNumberOfDesc = 0;\r | |
1067 | gBS->FreePool (MemSpaceMap);\r | |
1068 | return ;\r | |
1069 | }\r | |
1070 | \r | |
1071 | mGcdMemNumberOfDesc = 0;\r | |
1072 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
1073 | if (MemSpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeReserved &&\r | |
1074 | (MemSpaceMap[Index].Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==\r | |
1075 | (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)\r | |
1076 | ) {\r | |
1077 | CopyMem (\r | |
1078 | &mGcdMemSpace[mGcdMemNumberOfDesc],\r | |
1079 | &MemSpaceMap[Index],\r | |
1080 | sizeof(EFI_GCD_MEMORY_SPACE_DESCRIPTOR)\r | |
1081 | );\r | |
1082 | mGcdMemNumberOfDesc++;\r | |
1083 | }\r | |
1084 | }\r | |
1085 | \r | |
1086 | gBS->FreePool (MemSpaceMap);\r | |
1087 | }\r | |
1088 | \r | |
d2fc7711 JY |
1089 | /**\r |
1090 | This function caches the UEFI memory map information.\r | |
1091 | **/\r | |
1092 | VOID\r | |
1093 | GetUefiMemoryMap (\r | |
1094 | VOID\r | |
1095 | )\r | |
1096 | {\r | |
1097 | EFI_STATUS Status;\r | |
1098 | UINTN MapKey;\r | |
1099 | UINT32 DescriptorVersion;\r | |
1100 | EFI_MEMORY_DESCRIPTOR *MemoryMap;\r | |
1101 | UINTN UefiMemoryMapSize;\r | |
1102 | \r | |
1103 | DEBUG ((DEBUG_INFO, "GetUefiMemoryMap\n"));\r | |
1104 | \r | |
1105 | UefiMemoryMapSize = 0;\r | |
1106 | MemoryMap = NULL;\r | |
1107 | Status = gBS->GetMemoryMap (\r | |
1108 | &UefiMemoryMapSize,\r | |
1109 | MemoryMap,\r | |
1110 | &MapKey,\r | |
1111 | &mUefiDescriptorSize,\r | |
1112 | &DescriptorVersion\r | |
1113 | );\r | |
1114 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
1115 | \r | |
1116 | do {\r | |
1117 | Status = gBS->AllocatePool (EfiBootServicesData, UefiMemoryMapSize, (VOID **)&MemoryMap);\r | |
1118 | ASSERT (MemoryMap != NULL);\r | |
1119 | if (MemoryMap == NULL) {\r | |
1120 | return ;\r | |
1121 | }\r | |
1122 | \r | |
1123 | Status = gBS->GetMemoryMap (\r | |
1124 | &UefiMemoryMapSize,\r | |
1125 | MemoryMap,\r | |
1126 | &MapKey,\r | |
1127 | &mUefiDescriptorSize,\r | |
1128 | &DescriptorVersion\r | |
1129 | );\r | |
1130 | if (EFI_ERROR (Status)) {\r | |
1131 | gBS->FreePool (MemoryMap);\r | |
1132 | MemoryMap = NULL;\r | |
1133 | }\r | |
1134 | } while (Status == EFI_BUFFER_TOO_SMALL);\r | |
1135 | \r | |
403f5476 HW |
1136 | if (MemoryMap == NULL) {\r |
1137 | return ;\r | |
1138 | }\r | |
1139 | \r | |
d2fc7711 JY |
1140 | SortMemoryMap (MemoryMap, UefiMemoryMapSize, mUefiDescriptorSize);\r |
1141 | MergeMemoryMapForNotPresentEntry (MemoryMap, &UefiMemoryMapSize, mUefiDescriptorSize);\r | |
1142 | \r | |
1143 | mUefiMemoryMapSize = UefiMemoryMapSize;\r | |
1144 | mUefiMemoryMap = AllocateCopyPool (UefiMemoryMapSize, MemoryMap);\r | |
1145 | ASSERT (mUefiMemoryMap != NULL);\r | |
1146 | \r | |
1147 | gBS->FreePool (MemoryMap);\r | |
ac6613db JY |
1148 | \r |
1149 | //\r | |
1150 | // Get additional information from GCD memory map.\r | |
1151 | //\r | |
1152 | GetGcdMemoryMap ();\r | |
d2fc7711 JY |
1153 | }\r |
1154 | \r | |
1155 | /**\r | |
1156 | This function sets UEFI memory attribute according to UEFI memory map.\r | |
1157 | \r | |
1158 | The normal memory region is marked as not present, such as\r | |
1159 | EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r | |
1160 | EfiUnusableMemory, EfiACPIReclaimMemory.\r | |
1161 | **/\r | |
1162 | VOID\r | |
1163 | SetUefiMemMapAttributes (\r | |
1164 | VOID\r | |
1165 | )\r | |
1166 | {\r | |
714c2603 | 1167 | EFI_STATUS Status;\r |
d2fc7711 JY |
1168 | EFI_MEMORY_DESCRIPTOR *MemoryMap;\r |
1169 | UINTN MemoryMapEntryCount;\r | |
1170 | UINTN Index;\r | |
1171 | \r | |
1172 | DEBUG ((DEBUG_INFO, "SetUefiMemMapAttributes\n"));\r | |
1173 | \r | |
ac6613db JY |
1174 | if (mUefiMemoryMap != NULL) {\r |
1175 | MemoryMapEntryCount = mUefiMemoryMapSize/mUefiDescriptorSize;\r | |
1176 | MemoryMap = mUefiMemoryMap;\r | |
1177 | for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r | |
1178 | if (IsUefiPageNotPresent(MemoryMap)) {\r | |
1179 | Status = SmmSetMemoryAttributes (\r | |
1180 | MemoryMap->PhysicalStart,\r | |
1181 | EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r | |
1182 | EFI_MEMORY_RP\r | |
1183 | );\r | |
1184 | DEBUG ((\r | |
1185 | DEBUG_INFO,\r | |
1186 | "UefiMemory protection: 0x%lx - 0x%lx %r\n",\r | |
1187 | MemoryMap->PhysicalStart,\r | |
1188 | MemoryMap->PhysicalStart + (UINT64)EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r | |
1189 | Status\r | |
1190 | ));\r | |
1191 | }\r | |
1192 | MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mUefiDescriptorSize);\r | |
1193 | }\r | |
d2fc7711 | 1194 | }\r |
ac6613db JY |
1195 | //\r |
1196 | // Do not free mUefiMemoryMap, it will be checked in IsSmmCommBufferForbiddenAddress().\r | |
1197 | //\r | |
d2fc7711 | 1198 | \r |
ac6613db JY |
1199 | //\r |
1200 | // Set untested memory as not present.\r | |
1201 | //\r | |
1202 | if (mGcdMemSpace != NULL) {\r | |
1203 | for (Index = 0; Index < mGcdMemNumberOfDesc; Index++) {\r | |
714c2603 | 1204 | Status = SmmSetMemoryAttributes (\r |
ac6613db JY |
1205 | mGcdMemSpace[Index].BaseAddress,\r |
1206 | mGcdMemSpace[Index].Length,\r | |
714c2603 SZ |
1207 | EFI_MEMORY_RP\r |
1208 | );\r | |
1209 | DEBUG ((\r | |
1210 | DEBUG_INFO,\r | |
ac6613db JY |
1211 | "GcdMemory protection: 0x%lx - 0x%lx %r\n",\r |
1212 | mGcdMemSpace[Index].BaseAddress,\r | |
1213 | mGcdMemSpace[Index].BaseAddress + mGcdMemSpace[Index].Length,\r | |
714c2603 SZ |
1214 | Status\r |
1215 | ));\r | |
d2fc7711 | 1216 | }\r |
d2fc7711 | 1217 | }\r |
d2fc7711 | 1218 | //\r |
ac6613db | 1219 | // Do not free mGcdMemSpace, it will be checked in IsSmmCommBufferForbiddenAddress().\r |
d2fc7711 JY |
1220 | //\r |
1221 | }\r | |
1222 | \r | |
1223 | /**\r | |
1224 | Return if the Address is forbidden as SMM communication buffer.\r | |
1225 | \r | |
1226 | @param[in] Address the address to be checked\r | |
1227 | \r | |
1228 | @return TRUE The address is forbidden as SMM communication buffer.\r | |
1229 | @return FALSE The address is allowed as SMM communication buffer.\r | |
1230 | **/\r | |
1231 | BOOLEAN\r | |
1232 | IsSmmCommBufferForbiddenAddress (\r | |
1233 | IN UINT64 Address\r | |
1234 | )\r | |
1235 | {\r | |
1236 | EFI_MEMORY_DESCRIPTOR *MemoryMap;\r | |
1237 | UINTN MemoryMapEntryCount;\r | |
1238 | UINTN Index;\r | |
1239 | \r | |
ac6613db JY |
1240 | if (mUefiMemoryMap != NULL) {\r |
1241 | MemoryMap = mUefiMemoryMap;\r | |
1242 | MemoryMapEntryCount = mUefiMemoryMapSize/mUefiDescriptorSize;\r | |
1243 | for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r | |
1244 | if (IsUefiPageNotPresent (MemoryMap)) {\r | |
1245 | if ((Address >= MemoryMap->PhysicalStart) &&\r | |
1246 | (Address < MemoryMap->PhysicalStart + EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages)) ) {\r | |
1247 | return TRUE;\r | |
1248 | }\r | |
1249 | }\r | |
1250 | MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mUefiDescriptorSize);\r | |
1251 | }\r | |
403f5476 HW |
1252 | }\r |
1253 | \r | |
ac6613db JY |
1254 | if (mGcdMemSpace != NULL) {\r |
1255 | for (Index = 0; Index < mGcdMemNumberOfDesc; Index++) {\r | |
1256 | if ((Address >= mGcdMemSpace[Index].BaseAddress) &&\r | |
1257 | (Address < mGcdMemSpace[Index].BaseAddress + mGcdMemSpace[Index].Length) ) {\r | |
d2fc7711 JY |
1258 | return TRUE;\r |
1259 | }\r | |
1260 | }\r | |
d2fc7711 | 1261 | }\r |
ac6613db | 1262 | \r |
d2fc7711 JY |
1263 | return FALSE;\r |
1264 | }\r | |
827330cc JW |
1265 | \r |
1266 | /**\r | |
1267 | This function set given attributes of the memory region specified by\r | |
1268 | BaseAddress and Length.\r | |
1269 | \r | |
1270 | @param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.\r | |
1271 | @param BaseAddress The physical address that is the start address of\r | |
1272 | a memory region.\r | |
1273 | @param Length The size in bytes of the memory region.\r | |
1274 | @param Attributes The bit mask of attributes to set for the memory\r | |
1275 | region.\r | |
1276 | \r | |
1277 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
1278 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
1279 | Attributes specified an illegal combination of\r | |
1280 | attributes that cannot be set together.\r | |
1281 | @retval EFI_UNSUPPORTED The processor does not support one or more\r | |
1282 | bytes of the memory resource range specified\r | |
1283 | by BaseAddress and Length.\r | |
aae02dcc | 1284 | The bit mask of attributes is not supported for\r |
827330cc JW |
1285 | the memory resource range specified by\r |
1286 | BaseAddress and Length.\r | |
1287 | \r | |
1288 | **/\r | |
1289 | EFI_STATUS\r | |
1290 | EFIAPI\r | |
1291 | EdkiiSmmSetMemoryAttributes (\r | |
1292 | IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,\r | |
1293 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
1294 | IN UINT64 Length,\r | |
1295 | IN UINT64 Attributes\r | |
1296 | )\r | |
1297 | {\r | |
1298 | return SmmSetMemoryAttributes (BaseAddress, Length, Attributes);\r | |
1299 | }\r | |
1300 | \r | |
1301 | /**\r | |
1302 | This function clears given attributes of the memory region specified by\r | |
1303 | BaseAddress and Length.\r | |
1304 | \r | |
1305 | @param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.\r | |
1306 | @param BaseAddress The physical address that is the start address of\r | |
1307 | a memory region.\r | |
1308 | @param Length The size in bytes of the memory region.\r | |
aae02dcc | 1309 | @param Attributes The bit mask of attributes to clear for the memory\r |
827330cc JW |
1310 | region.\r |
1311 | \r | |
aae02dcc | 1312 | @retval EFI_SUCCESS The attributes were cleared for the memory region.\r |
827330cc JW |
1313 | @retval EFI_INVALID_PARAMETER Length is zero.\r |
1314 | Attributes specified an illegal combination of\r | |
aae02dcc | 1315 | attributes that cannot be cleared together.\r |
827330cc JW |
1316 | @retval EFI_UNSUPPORTED The processor does not support one or more\r |
1317 | bytes of the memory resource range specified\r | |
1318 | by BaseAddress and Length.\r | |
aae02dcc | 1319 | The bit mask of attributes is not supported for\r |
827330cc JW |
1320 | the memory resource range specified by\r |
1321 | BaseAddress and Length.\r | |
1322 | \r | |
1323 | **/\r | |
1324 | EFI_STATUS\r | |
1325 | EFIAPI\r | |
1326 | EdkiiSmmClearMemoryAttributes (\r | |
1327 | IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,\r | |
1328 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
1329 | IN UINT64 Length,\r | |
1330 | IN UINT64 Attributes\r | |
1331 | )\r | |
1332 | {\r | |
1333 | return SmmClearMemoryAttributes (BaseAddress, Length, Attributes);\r | |
1334 | }\r | |
1335 | \r | |
1336 | /**\r | |
aae02dcc | 1337 | This function retrieves the attributes of the memory region specified by\r |
827330cc JW |
1338 | BaseAddress and Length. If different attributes are got from different part\r |
1339 | of the memory region, EFI_NO_MAPPING will be returned.\r | |
1340 | \r | |
1341 | @param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.\r | |
1342 | @param BaseAddress The physical address that is the start address of\r | |
1343 | a memory region.\r | |
1344 | @param Length The size in bytes of the memory region.\r | |
1345 | @param Attributes Pointer to attributes returned.\r | |
1346 | \r | |
1347 | @retval EFI_SUCCESS The attributes got for the memory region.\r | |
1348 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
1349 | Attributes is NULL.\r | |
1350 | @retval EFI_NO_MAPPING Attributes are not consistent cross the memory\r | |
1351 | region.\r | |
1352 | @retval EFI_UNSUPPORTED The processor does not support one or more\r | |
1353 | bytes of the memory resource range specified\r | |
1354 | by BaseAddress and Length.\r | |
827330cc JW |
1355 | \r |
1356 | **/\r | |
1357 | EFI_STATUS\r | |
1358 | EFIAPI\r | |
1359 | EdkiiSmmGetMemoryAttributes (\r | |
1360 | IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,\r | |
1361 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
1362 | IN UINT64 Length,\r | |
1363 | OUT UINT64 *Attributes\r | |
1364 | )\r | |
1365 | {\r | |
1366 | EFI_PHYSICAL_ADDRESS Address;\r | |
1367 | UINT64 *PageEntry;\r | |
1368 | UINT64 MemAttr;\r | |
1369 | PAGE_ATTRIBUTE PageAttr;\r | |
1370 | INT64 Size;\r | |
1371 | \r | |
1372 | if (Length < SIZE_4KB || Attributes == NULL) {\r | |
1373 | return EFI_INVALID_PARAMETER;\r | |
1374 | }\r | |
1375 | \r | |
1376 | Size = (INT64)Length;\r | |
1377 | MemAttr = (UINT64)-1;\r | |
1378 | \r | |
1379 | do {\r | |
1380 | \r | |
1381 | PageEntry = GetPageTableEntry (BaseAddress, &PageAttr);\r | |
1382 | if (PageEntry == NULL || PageAttr == PageNone) {\r | |
1383 | return EFI_UNSUPPORTED;\r | |
1384 | }\r | |
1385 | \r | |
1386 | //\r | |
1387 | // If the memory range is cross page table boundary, make sure they\r | |
1388 | // share the same attribute. Return EFI_NO_MAPPING if not.\r | |
1389 | //\r | |
1390 | *Attributes = GetAttributesFromPageEntry (PageEntry);\r | |
1391 | if (MemAttr != (UINT64)-1 && *Attributes != MemAttr) {\r | |
1392 | return EFI_NO_MAPPING;\r | |
1393 | }\r | |
1394 | \r | |
1395 | switch (PageAttr) {\r | |
1396 | case Page4K:\r | |
1397 | Address = *PageEntry & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64;\r | |
1398 | Size -= (SIZE_4KB - (BaseAddress - Address));\r | |
1399 | BaseAddress += (SIZE_4KB - (BaseAddress - Address));\r | |
1400 | break;\r | |
1401 | \r | |
1402 | case Page2M:\r | |
1403 | Address = *PageEntry & ~mAddressEncMask & PAGING_2M_ADDRESS_MASK_64;\r | |
1404 | Size -= SIZE_2MB - (BaseAddress - Address);\r | |
1405 | BaseAddress += SIZE_2MB - (BaseAddress - Address);\r | |
1406 | break;\r | |
1407 | \r | |
1408 | case Page1G:\r | |
1409 | Address = *PageEntry & ~mAddressEncMask & PAGING_1G_ADDRESS_MASK_64;\r | |
1410 | Size -= SIZE_1GB - (BaseAddress - Address);\r | |
1411 | BaseAddress += SIZE_1GB - (BaseAddress - Address);\r | |
1412 | break;\r | |
1413 | \r | |
1414 | default:\r | |
1415 | return EFI_UNSUPPORTED;\r | |
1416 | }\r | |
1417 | \r | |
1418 | MemAttr = *Attributes;\r | |
1419 | \r | |
1420 | } while (Size > 0);\r | |
1421 | \r | |
1422 | return EFI_SUCCESS;\r | |
1423 | }\r | |
1424 | \r |