]>
Commit | Line | Data |
---|---|---|
1 | /** @file\r | |
2 | * File managing the MMU for ARMv7 architecture\r | |
3 | *\r | |
4 | * Copyright (c) 2011-2016, ARM Limited. All rights reserved.\r | |
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 <Uefi.h>\r | |
17 | #include <Chipset/ArmV7.h>\r | |
18 | #include <Library/BaseMemoryLib.h>\r | |
19 | #include <Library/CacheMaintenanceLib.h>\r | |
20 | #include <Library/MemoryAllocationLib.h>\r | |
21 | #include <Library/ArmLib.h>\r | |
22 | #include <Library/BaseLib.h>\r | |
23 | #include <Library/DebugLib.h>\r | |
24 | #include <Library/PcdLib.h>\r | |
25 | \r | |
26 | #define ID_MMFR0_SHARELVL_SHIFT 12\r | |
27 | #define ID_MMFR0_SHARELVL_MASK 0xf\r | |
28 | #define ID_MMFR0_SHARELVL_ONE 0\r | |
29 | #define ID_MMFR0_SHARELVL_TWO 1\r | |
30 | \r | |
31 | #define ID_MMFR0_INNERSHR_SHIFT 28\r | |
32 | #define ID_MMFR0_INNERSHR_MASK 0xf\r | |
33 | #define ID_MMFR0_OUTERSHR_SHIFT 8\r | |
34 | #define ID_MMFR0_OUTERSHR_MASK 0xf\r | |
35 | \r | |
36 | #define ID_MMFR0_SHR_IMP_UNCACHED 0\r | |
37 | #define ID_MMFR0_SHR_IMP_HW_COHERENT 1\r | |
38 | #define ID_MMFR0_SHR_IGNORED 0xf\r | |
39 | \r | |
40 | #define __EFI_MEMORY_RWX 0 // no restrictions\r | |
41 | \r | |
42 | #define CACHE_ATTRIBUTE_MASK (EFI_MEMORY_UC | \\r | |
43 | EFI_MEMORY_WC | \\r | |
44 | EFI_MEMORY_WT | \\r | |
45 | EFI_MEMORY_WB | \\r | |
46 | EFI_MEMORY_UCE | \\r | |
47 | EFI_MEMORY_WP)\r | |
48 | \r | |
49 | UINTN\r | |
50 | EFIAPI\r | |
51 | ArmReadIdMmfr0 (\r | |
52 | VOID\r | |
53 | );\r | |
54 | \r | |
55 | BOOLEAN\r | |
56 | EFIAPI\r | |
57 | ArmHasMpExtensions (\r | |
58 | VOID\r | |
59 | );\r | |
60 | \r | |
61 | UINT32\r | |
62 | ConvertSectionAttributesToPageAttributes (\r | |
63 | IN UINT32 SectionAttributes,\r | |
64 | IN BOOLEAN IsLargePage\r | |
65 | )\r | |
66 | {\r | |
67 | UINT32 PageAttributes;\r | |
68 | \r | |
69 | PageAttributes = 0;\r | |
70 | PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_CACHE_POLICY (SectionAttributes, IsLargePage);\r | |
71 | PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AP (SectionAttributes);\r | |
72 | PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_XN (SectionAttributes, IsLargePage);\r | |
73 | PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_NG (SectionAttributes);\r | |
74 | PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_S (SectionAttributes);\r | |
75 | \r | |
76 | return PageAttributes;\r | |
77 | }\r | |
78 | \r | |
79 | STATIC\r | |
80 | BOOLEAN\r | |
81 | PreferNonshareableMemory (\r | |
82 | VOID\r | |
83 | )\r | |
84 | {\r | |
85 | UINTN Mmfr;\r | |
86 | UINTN Val;\r | |
87 | \r | |
88 | if (FeaturePcdGet (PcdNormalMemoryNonshareableOverride)) {\r | |
89 | return TRUE;\r | |
90 | }\r | |
91 | \r | |
92 | //\r | |
93 | // Check whether the innermost level of shareability (the level we will use\r | |
94 | // by default to map normal memory) is implemented with hardware coherency\r | |
95 | // support. Otherwise, revert to mapping as non-shareable.\r | |
96 | //\r | |
97 | Mmfr = ArmReadIdMmfr0 ();\r | |
98 | switch ((Mmfr >> ID_MMFR0_SHARELVL_SHIFT) & ID_MMFR0_SHARELVL_MASK) {\r | |
99 | case ID_MMFR0_SHARELVL_ONE:\r | |
100 | // one level of shareability\r | |
101 | Val = (Mmfr >> ID_MMFR0_OUTERSHR_SHIFT) & ID_MMFR0_OUTERSHR_MASK;\r | |
102 | break;\r | |
103 | case ID_MMFR0_SHARELVL_TWO:\r | |
104 | // two levels of shareability\r | |
105 | Val = (Mmfr >> ID_MMFR0_INNERSHR_SHIFT) & ID_MMFR0_INNERSHR_MASK;\r | |
106 | break;\r | |
107 | default:\r | |
108 | // unexpected value -> shareable is the safe option\r | |
109 | ASSERT (FALSE);\r | |
110 | return FALSE;\r | |
111 | }\r | |
112 | return Val != ID_MMFR0_SHR_IMP_HW_COHERENT;\r | |
113 | }\r | |
114 | \r | |
115 | STATIC\r | |
116 | VOID\r | |
117 | PopulateLevel2PageTable (\r | |
118 | IN UINT32 *SectionEntry,\r | |
119 | IN UINT32 PhysicalBase,\r | |
120 | IN UINT32 RemainLength,\r | |
121 | IN ARM_MEMORY_REGION_ATTRIBUTES Attributes\r | |
122 | )\r | |
123 | {\r | |
124 | UINT32* PageEntry;\r | |
125 | UINT32 Pages;\r | |
126 | UINT32 Index;\r | |
127 | UINT32 PageAttributes;\r | |
128 | UINT32 SectionDescriptor;\r | |
129 | UINT32 TranslationTable;\r | |
130 | UINT32 BaseSectionAddress;\r | |
131 | UINT32 FirstPageOffset;\r | |
132 | \r | |
133 | switch (Attributes) {\r | |
134 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK:\r | |
135 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK:\r | |
136 | PageAttributes = TT_DESCRIPTOR_PAGE_WRITE_BACK;\r | |
137 | break;\r | |
138 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK_NONSHAREABLE:\r | |
139 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK_NONSHAREABLE:\r | |
140 | PageAttributes = TT_DESCRIPTOR_PAGE_WRITE_BACK;\r | |
141 | PageAttributes &= ~TT_DESCRIPTOR_PAGE_S_SHARED;\r | |
142 | break;\r | |
143 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH:\r | |
144 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_THROUGH:\r | |
145 | PageAttributes = TT_DESCRIPTOR_PAGE_WRITE_THROUGH;\r | |
146 | break;\r | |
147 | case ARM_MEMORY_REGION_ATTRIBUTE_DEVICE:\r | |
148 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_DEVICE:\r | |
149 | PageAttributes = TT_DESCRIPTOR_PAGE_DEVICE;\r | |
150 | break;\r | |
151 | case ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED:\r | |
152 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_UNCACHED_UNBUFFERED:\r | |
153 | PageAttributes = TT_DESCRIPTOR_PAGE_UNCACHED;\r | |
154 | break;\r | |
155 | default:\r | |
156 | PageAttributes = TT_DESCRIPTOR_PAGE_UNCACHED;\r | |
157 | break;\r | |
158 | }\r | |
159 | \r | |
160 | if (PreferNonshareableMemory ()) {\r | |
161 | PageAttributes &= ~TT_DESCRIPTOR_PAGE_S_SHARED;\r | |
162 | }\r | |
163 | \r | |
164 | // Check if the Section Entry has already been populated. Otherwise attach a\r | |
165 | // Level 2 Translation Table to it\r | |
166 | if (*SectionEntry != 0) {\r | |
167 | // The entry must be a page table. Otherwise it exists an overlapping in the memory map\r | |
168 | if (TT_DESCRIPTOR_SECTION_TYPE_IS_PAGE_TABLE(*SectionEntry)) {\r | |
169 | TranslationTable = *SectionEntry & TT_DESCRIPTOR_SECTION_PAGETABLE_ADDRESS_MASK;\r | |
170 | } else if ((*SectionEntry & TT_DESCRIPTOR_SECTION_TYPE_MASK) == TT_DESCRIPTOR_SECTION_TYPE_SECTION) {\r | |
171 | // Case where a virtual memory map descriptor overlapped a section entry\r | |
172 | \r | |
173 | // Allocate a Level2 Page Table for this Section\r | |
174 | TranslationTable = (UINTN)AllocatePages(EFI_SIZE_TO_PAGES(TRANSLATION_TABLE_PAGE_SIZE + TRANSLATION_TABLE_PAGE_ALIGNMENT));\r | |
175 | TranslationTable = ((UINTN)TranslationTable + TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK) & ~TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK;\r | |
176 | \r | |
177 | // Translate the Section Descriptor into Page Descriptor\r | |
178 | SectionDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE | ConvertSectionAttributesToPageAttributes (*SectionEntry, FALSE);\r | |
179 | \r | |
180 | BaseSectionAddress = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(*SectionEntry);\r | |
181 | \r | |
182 | // Populate the new Level2 Page Table for the section\r | |
183 | PageEntry = (UINT32*)TranslationTable;\r | |
184 | for (Index = 0; Index < TRANSLATION_TABLE_PAGE_COUNT; Index++) {\r | |
185 | PageEntry[Index] = TT_DESCRIPTOR_PAGE_BASE_ADDRESS(BaseSectionAddress + (Index << 12)) | SectionDescriptor;\r | |
186 | }\r | |
187 | \r | |
188 | // Overwrite the section entry to point to the new Level2 Translation Table\r | |
189 | *SectionEntry = (TranslationTable & TT_DESCRIPTOR_SECTION_PAGETABLE_ADDRESS_MASK) |\r | |
190 | (IS_ARM_MEMORY_REGION_ATTRIBUTES_SECURE(Attributes) ? (1 << 3) : 0) |\r | |
191 | TT_DESCRIPTOR_SECTION_TYPE_PAGE_TABLE;\r | |
192 | } else {\r | |
193 | // We do not support the other section type (16MB Section)\r | |
194 | ASSERT(0);\r | |
195 | return;\r | |
196 | }\r | |
197 | } else {\r | |
198 | TranslationTable = (UINTN)AllocatePages(EFI_SIZE_TO_PAGES(TRANSLATION_TABLE_PAGE_SIZE + TRANSLATION_TABLE_PAGE_ALIGNMENT));\r | |
199 | TranslationTable = ((UINTN)TranslationTable + TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK) & ~TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK;\r | |
200 | \r | |
201 | ZeroMem ((VOID *)TranslationTable, TRANSLATION_TABLE_PAGE_SIZE);\r | |
202 | \r | |
203 | *SectionEntry = (TranslationTable & TT_DESCRIPTOR_SECTION_PAGETABLE_ADDRESS_MASK) |\r | |
204 | (IS_ARM_MEMORY_REGION_ATTRIBUTES_SECURE(Attributes) ? (1 << 3) : 0) |\r | |
205 | TT_DESCRIPTOR_SECTION_TYPE_PAGE_TABLE;\r | |
206 | }\r | |
207 | \r | |
208 | FirstPageOffset = (PhysicalBase & TT_DESCRIPTOR_PAGE_INDEX_MASK) >> TT_DESCRIPTOR_PAGE_BASE_SHIFT;\r | |
209 | PageEntry = (UINT32 *)TranslationTable + FirstPageOffset;\r | |
210 | Pages = RemainLength / TT_DESCRIPTOR_PAGE_SIZE;\r | |
211 | \r | |
212 | ASSERT (FirstPageOffset + Pages <= TRANSLATION_TABLE_PAGE_COUNT);\r | |
213 | \r | |
214 | for (Index = 0; Index < Pages; Index++) {\r | |
215 | *PageEntry++ = TT_DESCRIPTOR_PAGE_BASE_ADDRESS(PhysicalBase) | PageAttributes;\r | |
216 | PhysicalBase += TT_DESCRIPTOR_PAGE_SIZE;\r | |
217 | }\r | |
218 | \r | |
219 | }\r | |
220 | \r | |
221 | STATIC\r | |
222 | VOID\r | |
223 | FillTranslationTable (\r | |
224 | IN UINT32 *TranslationTable,\r | |
225 | IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryRegion\r | |
226 | )\r | |
227 | {\r | |
228 | UINT32 *SectionEntry;\r | |
229 | UINT32 Attributes;\r | |
230 | UINT32 PhysicalBase;\r | |
231 | UINT64 RemainLength;\r | |
232 | UINT32 PageMapLength;\r | |
233 | \r | |
234 | ASSERT(MemoryRegion->Length > 0);\r | |
235 | \r | |
236 | if (MemoryRegion->PhysicalBase >= SIZE_4GB) {\r | |
237 | return;\r | |
238 | }\r | |
239 | \r | |
240 | PhysicalBase = MemoryRegion->PhysicalBase;\r | |
241 | RemainLength = MIN(MemoryRegion->Length, SIZE_4GB - PhysicalBase);\r | |
242 | \r | |
243 | switch (MemoryRegion->Attributes) {\r | |
244 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK:\r | |
245 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_BACK(0);\r | |
246 | break;\r | |
247 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK_NONSHAREABLE:\r | |
248 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_BACK(0);\r | |
249 | Attributes &= ~TT_DESCRIPTOR_SECTION_S_SHARED;\r | |
250 | break;\r | |
251 | case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH:\r | |
252 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_THROUGH(0);\r | |
253 | break;\r | |
254 | case ARM_MEMORY_REGION_ATTRIBUTE_DEVICE:\r | |
255 | Attributes = TT_DESCRIPTOR_SECTION_DEVICE(0);\r | |
256 | break;\r | |
257 | case ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED:\r | |
258 | Attributes = TT_DESCRIPTOR_SECTION_UNCACHED(0);\r | |
259 | break;\r | |
260 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK:\r | |
261 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_BACK(1);\r | |
262 | break;\r | |
263 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK_NONSHAREABLE:\r | |
264 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_BACK(1);\r | |
265 | Attributes &= ~TT_DESCRIPTOR_SECTION_S_SHARED;\r | |
266 | break;\r | |
267 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_THROUGH:\r | |
268 | Attributes = TT_DESCRIPTOR_SECTION_WRITE_THROUGH(1);\r | |
269 | break;\r | |
270 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_DEVICE:\r | |
271 | Attributes = TT_DESCRIPTOR_SECTION_DEVICE(1);\r | |
272 | break;\r | |
273 | case ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_UNCACHED_UNBUFFERED:\r | |
274 | Attributes = TT_DESCRIPTOR_SECTION_UNCACHED(1);\r | |
275 | break;\r | |
276 | default:\r | |
277 | Attributes = TT_DESCRIPTOR_SECTION_UNCACHED(0);\r | |
278 | break;\r | |
279 | }\r | |
280 | \r | |
281 | if (PreferNonshareableMemory ()) {\r | |
282 | Attributes &= ~TT_DESCRIPTOR_SECTION_S_SHARED;\r | |
283 | }\r | |
284 | \r | |
285 | // Get the first section entry for this mapping\r | |
286 | SectionEntry = TRANSLATION_TABLE_ENTRY_FOR_VIRTUAL_ADDRESS(TranslationTable, MemoryRegion->VirtualBase);\r | |
287 | \r | |
288 | while (RemainLength != 0) {\r | |
289 | if (PhysicalBase % TT_DESCRIPTOR_SECTION_SIZE == 0 &&\r | |
290 | RemainLength >= TT_DESCRIPTOR_SECTION_SIZE) {\r | |
291 | // Case: Physical address aligned on the Section Size (1MB) && the length\r | |
292 | // is greater than the Section Size\r | |
293 | *SectionEntry++ = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(PhysicalBase) | Attributes;\r | |
294 | PhysicalBase += TT_DESCRIPTOR_SECTION_SIZE;\r | |
295 | RemainLength -= TT_DESCRIPTOR_SECTION_SIZE;\r | |
296 | } else {\r | |
297 | PageMapLength = MIN (RemainLength, TT_DESCRIPTOR_SECTION_SIZE -\r | |
298 | (PhysicalBase % TT_DESCRIPTOR_SECTION_SIZE));\r | |
299 | \r | |
300 | // Case: Physical address aligned on the Section Size (1MB) && the length\r | |
301 | // does not fill a section\r | |
302 | // Case: Physical address NOT aligned on the Section Size (1MB)\r | |
303 | PopulateLevel2PageTable (SectionEntry++, PhysicalBase, PageMapLength,\r | |
304 | MemoryRegion->Attributes);\r | |
305 | \r | |
306 | // If it is the last entry\r | |
307 | if (RemainLength < TT_DESCRIPTOR_SECTION_SIZE) {\r | |
308 | break;\r | |
309 | }\r | |
310 | \r | |
311 | PhysicalBase += PageMapLength;\r | |
312 | RemainLength -= PageMapLength;\r | |
313 | }\r | |
314 | }\r | |
315 | }\r | |
316 | \r | |
317 | RETURN_STATUS\r | |
318 | EFIAPI\r | |
319 | ArmConfigureMmu (\r | |
320 | IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable,\r | |
321 | OUT VOID **TranslationTableBase OPTIONAL,\r | |
322 | OUT UINTN *TranslationTableSize OPTIONAL\r | |
323 | )\r | |
324 | {\r | |
325 | VOID* TranslationTable;\r | |
326 | ARM_MEMORY_REGION_ATTRIBUTES TranslationTableAttribute;\r | |
327 | UINT32 TTBRAttributes;\r | |
328 | \r | |
329 | // Allocate pages for translation table.\r | |
330 | TranslationTable = AllocatePages (EFI_SIZE_TO_PAGES (TRANSLATION_TABLE_SECTION_SIZE + TRANSLATION_TABLE_SECTION_ALIGNMENT));\r | |
331 | if (TranslationTable == NULL) {\r | |
332 | return RETURN_OUT_OF_RESOURCES;\r | |
333 | }\r | |
334 | TranslationTable = (VOID*)(((UINTN)TranslationTable + TRANSLATION_TABLE_SECTION_ALIGNMENT_MASK) & ~TRANSLATION_TABLE_SECTION_ALIGNMENT_MASK);\r | |
335 | \r | |
336 | if (TranslationTableBase != NULL) {\r | |
337 | *TranslationTableBase = TranslationTable;\r | |
338 | }\r | |
339 | \r | |
340 | if (TranslationTableSize != NULL) {\r | |
341 | *TranslationTableSize = TRANSLATION_TABLE_SECTION_SIZE;\r | |
342 | }\r | |
343 | \r | |
344 | ZeroMem (TranslationTable, TRANSLATION_TABLE_SECTION_SIZE);\r | |
345 | \r | |
346 | // By default, mark the translation table as belonging to a uncached region\r | |
347 | TranslationTableAttribute = ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED;\r | |
348 | while (MemoryTable->Length != 0) {\r | |
349 | // Find the memory attribute for the Translation Table\r | |
350 | if (((UINTN)TranslationTable >= MemoryTable->PhysicalBase) && ((UINTN)TranslationTable <= MemoryTable->PhysicalBase - 1 + MemoryTable->Length)) {\r | |
351 | TranslationTableAttribute = MemoryTable->Attributes;\r | |
352 | }\r | |
353 | \r | |
354 | FillTranslationTable (TranslationTable, MemoryTable);\r | |
355 | MemoryTable++;\r | |
356 | }\r | |
357 | \r | |
358 | // Translate the Memory Attributes into Translation Table Register Attributes\r | |
359 | if ((TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK) ||\r | |
360 | (TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK)) {\r | |
361 | TTBRAttributes = ArmHasMpExtensions () ? TTBR_MP_WRITE_BACK_ALLOC : TTBR_WRITE_BACK_ALLOC;\r | |
362 | } else {\r | |
363 | // Page tables must reside in memory mapped as write-back cacheable\r | |
364 | ASSERT (0);\r | |
365 | return RETURN_UNSUPPORTED;\r | |
366 | }\r | |
367 | \r | |
368 | if (TTBRAttributes & TTBR_SHAREABLE) {\r | |
369 | if (PreferNonshareableMemory ()) {\r | |
370 | TTBRAttributes ^= TTBR_SHAREABLE;\r | |
371 | } else {\r | |
372 | //\r | |
373 | // Unlike the S bit in the short descriptors, which implies inner shareable\r | |
374 | // on an implementation that supports two levels, the meaning of the S bit\r | |
375 | // in the TTBR depends on the NOS bit, which defaults to Outer Shareable.\r | |
376 | // However, we should only set this bit after we have confirmed that the\r | |
377 | // implementation supports multiple levels, or else the NOS bit is UNK/SBZP\r | |
378 | //\r | |
379 | if (((ArmReadIdMmfr0 () >> 12) & 0xf) != 0) {\r | |
380 | TTBRAttributes |= TTBR_NOT_OUTER_SHAREABLE;\r | |
381 | }\r | |
382 | }\r | |
383 | }\r | |
384 | \r | |
385 | ArmCleanInvalidateDataCache ();\r | |
386 | ArmInvalidateInstructionCache ();\r | |
387 | \r | |
388 | ArmDisableDataCache ();\r | |
389 | ArmDisableInstructionCache();\r | |
390 | // TLBs are also invalidated when calling ArmDisableMmu()\r | |
391 | ArmDisableMmu ();\r | |
392 | \r | |
393 | // Make sure nothing sneaked into the cache\r | |
394 | ArmCleanInvalidateDataCache ();\r | |
395 | ArmInvalidateInstructionCache ();\r | |
396 | \r | |
397 | ArmSetTTBR0 ((VOID *)(UINTN)(((UINTN)TranslationTable & ~TRANSLATION_TABLE_SECTION_ALIGNMENT_MASK) | (TTBRAttributes & 0x7F)));\r | |
398 | \r | |
399 | //\r | |
400 | // The TTBCR register value is undefined at reset in the Non-Secure world.\r | |
401 | // Writing 0 has the effect of:\r | |
402 | // Clearing EAE: Use short descriptors, as mandated by specification.\r | |
403 | // Clearing PD0 and PD1: Translation Table Walk Disable is off.\r | |
404 | // Clearing N: Perform all translation table walks through TTBR0.\r | |
405 | // (0 is the default reset value in systems not implementing\r | |
406 | // the Security Extensions.)\r | |
407 | //\r | |
408 | ArmSetTTBCR (0);\r | |
409 | \r | |
410 | ArmSetDomainAccessControl (DOMAIN_ACCESS_CONTROL_NONE(15) |\r | |
411 | DOMAIN_ACCESS_CONTROL_NONE(14) |\r | |
412 | DOMAIN_ACCESS_CONTROL_NONE(13) |\r | |
413 | DOMAIN_ACCESS_CONTROL_NONE(12) |\r | |
414 | DOMAIN_ACCESS_CONTROL_NONE(11) |\r | |
415 | DOMAIN_ACCESS_CONTROL_NONE(10) |\r | |
416 | DOMAIN_ACCESS_CONTROL_NONE( 9) |\r | |
417 | DOMAIN_ACCESS_CONTROL_NONE( 8) |\r | |
418 | DOMAIN_ACCESS_CONTROL_NONE( 7) |\r | |
419 | DOMAIN_ACCESS_CONTROL_NONE( 6) |\r | |
420 | DOMAIN_ACCESS_CONTROL_NONE( 5) |\r | |
421 | DOMAIN_ACCESS_CONTROL_NONE( 4) |\r | |
422 | DOMAIN_ACCESS_CONTROL_NONE( 3) |\r | |
423 | DOMAIN_ACCESS_CONTROL_NONE( 2) |\r | |
424 | DOMAIN_ACCESS_CONTROL_NONE( 1) |\r | |
425 | DOMAIN_ACCESS_CONTROL_CLIENT(0));\r | |
426 | \r | |
427 | ArmEnableInstructionCache();\r | |
428 | ArmEnableDataCache();\r | |
429 | ArmEnableMmu();\r | |
430 | return RETURN_SUCCESS;\r | |
431 | }\r | |
432 | \r | |
433 | STATIC\r | |
434 | EFI_STATUS\r | |
435 | ConvertSectionToPages (\r | |
436 | IN EFI_PHYSICAL_ADDRESS BaseAddress\r | |
437 | )\r | |
438 | {\r | |
439 | UINT32 FirstLevelIdx;\r | |
440 | UINT32 SectionDescriptor;\r | |
441 | UINT32 PageTableDescriptor;\r | |
442 | UINT32 PageDescriptor;\r | |
443 | UINT32 Index;\r | |
444 | \r | |
445 | volatile ARM_FIRST_LEVEL_DESCRIPTOR *FirstLevelTable;\r | |
446 | volatile ARM_PAGE_TABLE_ENTRY *PageTable;\r | |
447 | \r | |
448 | DEBUG ((EFI_D_PAGE, "Converting section at 0x%x to pages\n", (UINTN)BaseAddress));\r | |
449 | \r | |
450 | // Obtain page table base\r | |
451 | FirstLevelTable = (ARM_FIRST_LEVEL_DESCRIPTOR *)ArmGetTTBR0BaseAddress ();\r | |
452 | \r | |
453 | // Calculate index into first level translation table for start of modification\r | |
454 | FirstLevelIdx = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(BaseAddress) >> TT_DESCRIPTOR_SECTION_BASE_SHIFT;\r | |
455 | ASSERT (FirstLevelIdx < TRANSLATION_TABLE_SECTION_COUNT);\r | |
456 | \r | |
457 | // Get section attributes and convert to page attributes\r | |
458 | SectionDescriptor = FirstLevelTable[FirstLevelIdx];\r | |
459 | PageDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE | ConvertSectionAttributesToPageAttributes (SectionDescriptor, FALSE);\r | |
460 | \r | |
461 | // Allocate a page table for the 4KB entries (we use up a full page even though we only need 1KB)\r | |
462 | PageTable = (volatile ARM_PAGE_TABLE_ENTRY *)AllocatePages (1);\r | |
463 | if (PageTable == NULL) {\r | |
464 | return EFI_OUT_OF_RESOURCES;\r | |
465 | }\r | |
466 | \r | |
467 | // Write the page table entries out\r | |
468 | for (Index = 0; Index < TRANSLATION_TABLE_PAGE_COUNT; Index++) {\r | |
469 | PageTable[Index] = TT_DESCRIPTOR_PAGE_BASE_ADDRESS(BaseAddress + (Index << 12)) | PageDescriptor;\r | |
470 | }\r | |
471 | \r | |
472 | // Formulate page table entry, Domain=0, NS=0\r | |
473 | PageTableDescriptor = (((UINTN)PageTable) & TT_DESCRIPTOR_SECTION_PAGETABLE_ADDRESS_MASK) | TT_DESCRIPTOR_SECTION_TYPE_PAGE_TABLE;\r | |
474 | \r | |
475 | // Write the page table entry out, replacing section entry\r | |
476 | FirstLevelTable[FirstLevelIdx] = PageTableDescriptor;\r | |
477 | \r | |
478 | return EFI_SUCCESS;\r | |
479 | }\r | |
480 | \r | |
481 | STATIC\r | |
482 | EFI_STATUS\r | |
483 | UpdatePageEntries (\r | |
484 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
485 | IN UINT64 Length,\r | |
486 | IN UINT64 Attributes,\r | |
487 | OUT BOOLEAN *FlushTlbs OPTIONAL\r | |
488 | )\r | |
489 | {\r | |
490 | EFI_STATUS Status;\r | |
491 | UINT32 EntryValue;\r | |
492 | UINT32 EntryMask;\r | |
493 | UINT32 FirstLevelIdx;\r | |
494 | UINT32 Offset;\r | |
495 | UINT32 NumPageEntries;\r | |
496 | UINT32 Descriptor;\r | |
497 | UINT32 p;\r | |
498 | UINT32 PageTableIndex;\r | |
499 | UINT32 PageTableEntry;\r | |
500 | UINT32 CurrentPageTableEntry;\r | |
501 | VOID *Mva;\r | |
502 | \r | |
503 | volatile ARM_FIRST_LEVEL_DESCRIPTOR *FirstLevelTable;\r | |
504 | volatile ARM_PAGE_TABLE_ENTRY *PageTable;\r | |
505 | \r | |
506 | Status = EFI_SUCCESS;\r | |
507 | \r | |
508 | // EntryMask: bitmask of values to change (1 = change this value, 0 = leave alone)\r | |
509 | // EntryValue: values at bit positions specified by EntryMask\r | |
510 | EntryMask = TT_DESCRIPTOR_PAGE_TYPE_MASK | TT_DESCRIPTOR_PAGE_AP_MASK;\r | |
511 | if (Attributes & EFI_MEMORY_XP) {\r | |
512 | EntryValue = TT_DESCRIPTOR_PAGE_TYPE_PAGE_XN;\r | |
513 | } else {\r | |
514 | EntryValue = TT_DESCRIPTOR_PAGE_TYPE_PAGE;\r | |
515 | }\r | |
516 | \r | |
517 | // Although the PI spec is unclear on this, the GCD guarantees that only\r | |
518 | // one Attribute bit is set at a time, so the order of the conditionals below\r | |
519 | // is irrelevant. If no memory attribute is specified, we preserve whatever\r | |
520 | // memory type is set in the page tables, and update the permission attributes\r | |
521 | // only.\r | |
522 | if (Attributes & EFI_MEMORY_UC) {\r | |
523 | // modify cacheability attributes\r | |
524 | EntryMask |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_MASK;\r | |
525 | // map to strongly ordered\r | |
526 | EntryValue |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_STRONGLY_ORDERED; // TEX[2:0] = 0, C=0, B=0\r | |
527 | } else if (Attributes & EFI_MEMORY_WC) {\r | |
528 | // modify cacheability attributes\r | |
529 | EntryMask |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_MASK;\r | |
530 | // map to normal non-cachable\r | |
531 | EntryValue |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_NON_CACHEABLE; // TEX [2:0]= 001 = 0x2, B=0, C=0\r | |
532 | } else if (Attributes & EFI_MEMORY_WT) {\r | |
533 | // modify cacheability attributes\r | |
534 | EntryMask |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_MASK;\r | |
535 | // write through with no-allocate\r | |
536 | EntryValue |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_WRITE_THROUGH_NO_ALLOC; // TEX [2:0] = 0, C=1, B=0\r | |
537 | } else if (Attributes & EFI_MEMORY_WB) {\r | |
538 | // modify cacheability attributes\r | |
539 | EntryMask |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_MASK;\r | |
540 | // write back (with allocate)\r | |
541 | EntryValue |= TT_DESCRIPTOR_PAGE_CACHE_POLICY_WRITE_BACK_ALLOC; // TEX [2:0] = 001, C=1, B=1\r | |
542 | } else if (Attributes & CACHE_ATTRIBUTE_MASK) {\r | |
543 | // catch unsupported memory type attributes\r | |
544 | ASSERT (FALSE);\r | |
545 | return EFI_UNSUPPORTED;\r | |
546 | }\r | |
547 | \r | |
548 | if (Attributes & EFI_MEMORY_RO) {\r | |
549 | EntryValue |= TT_DESCRIPTOR_PAGE_AP_RO_RO;\r | |
550 | } else {\r | |
551 | EntryValue |= TT_DESCRIPTOR_PAGE_AP_RW_RW;\r | |
552 | }\r | |
553 | \r | |
554 | // Obtain page table base\r | |
555 | FirstLevelTable = (ARM_FIRST_LEVEL_DESCRIPTOR *)ArmGetTTBR0BaseAddress ();\r | |
556 | \r | |
557 | // Calculate number of 4KB page table entries to change\r | |
558 | NumPageEntries = Length / TT_DESCRIPTOR_PAGE_SIZE;\r | |
559 | \r | |
560 | // Iterate for the number of 4KB pages to change\r | |
561 | Offset = 0;\r | |
562 | for(p = 0; p < NumPageEntries; p++) {\r | |
563 | // Calculate index into first level translation table for page table value\r | |
564 | \r | |
565 | FirstLevelIdx = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(BaseAddress + Offset) >> TT_DESCRIPTOR_SECTION_BASE_SHIFT;\r | |
566 | ASSERT (FirstLevelIdx < TRANSLATION_TABLE_SECTION_COUNT);\r | |
567 | \r | |
568 | // Read the descriptor from the first level page table\r | |
569 | Descriptor = FirstLevelTable[FirstLevelIdx];\r | |
570 | \r | |
571 | // Does this descriptor need to be converted from section entry to 4K pages?\r | |
572 | if (!TT_DESCRIPTOR_SECTION_TYPE_IS_PAGE_TABLE(Descriptor)) {\r | |
573 | Status = ConvertSectionToPages (FirstLevelIdx << TT_DESCRIPTOR_SECTION_BASE_SHIFT);\r | |
574 | if (EFI_ERROR(Status)) {\r | |
575 | // Exit for loop\r | |
576 | break;\r | |
577 | }\r | |
578 | \r | |
579 | // Re-read descriptor\r | |
580 | Descriptor = FirstLevelTable[FirstLevelIdx];\r | |
581 | if (FlushTlbs != NULL) {\r | |
582 | *FlushTlbs = TRUE;\r | |
583 | }\r | |
584 | }\r | |
585 | \r | |
586 | // Obtain page table base address\r | |
587 | PageTable = (ARM_PAGE_TABLE_ENTRY *)TT_DESCRIPTOR_PAGE_BASE_ADDRESS(Descriptor);\r | |
588 | \r | |
589 | // Calculate index into the page table\r | |
590 | PageTableIndex = ((BaseAddress + Offset) & TT_DESCRIPTOR_PAGE_INDEX_MASK) >> TT_DESCRIPTOR_PAGE_BASE_SHIFT;\r | |
591 | ASSERT (PageTableIndex < TRANSLATION_TABLE_PAGE_COUNT);\r | |
592 | \r | |
593 | // Get the entry\r | |
594 | CurrentPageTableEntry = PageTable[PageTableIndex];\r | |
595 | \r | |
596 | // Mask off appropriate fields\r | |
597 | PageTableEntry = CurrentPageTableEntry & ~EntryMask;\r | |
598 | \r | |
599 | // Mask in new attributes and/or permissions\r | |
600 | PageTableEntry |= EntryValue;\r | |
601 | \r | |
602 | if (CurrentPageTableEntry != PageTableEntry) {\r | |
603 | Mva = (VOID *)(UINTN)((((UINTN)FirstLevelIdx) << TT_DESCRIPTOR_SECTION_BASE_SHIFT) + (PageTableIndex << TT_DESCRIPTOR_PAGE_BASE_SHIFT));\r | |
604 | \r | |
605 | // Only need to update if we are changing the entry\r | |
606 | PageTable[PageTableIndex] = PageTableEntry;\r | |
607 | ArmUpdateTranslationTableEntry ((VOID *)&PageTable[PageTableIndex], Mva);\r | |
608 | }\r | |
609 | \r | |
610 | Status = EFI_SUCCESS;\r | |
611 | Offset += TT_DESCRIPTOR_PAGE_SIZE;\r | |
612 | \r | |
613 | } // End first level translation table loop\r | |
614 | \r | |
615 | return Status;\r | |
616 | }\r | |
617 | \r | |
618 | STATIC\r | |
619 | EFI_STATUS\r | |
620 | UpdateSectionEntries (\r | |
621 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
622 | IN UINT64 Length,\r | |
623 | IN UINT64 Attributes\r | |
624 | )\r | |
625 | {\r | |
626 | EFI_STATUS Status = EFI_SUCCESS;\r | |
627 | UINT32 EntryMask;\r | |
628 | UINT32 EntryValue;\r | |
629 | UINT32 FirstLevelIdx;\r | |
630 | UINT32 NumSections;\r | |
631 | UINT32 i;\r | |
632 | UINT32 CurrentDescriptor;\r | |
633 | UINT32 Descriptor;\r | |
634 | VOID *Mva;\r | |
635 | volatile ARM_FIRST_LEVEL_DESCRIPTOR *FirstLevelTable;\r | |
636 | \r | |
637 | // EntryMask: bitmask of values to change (1 = change this value, 0 = leave alone)\r | |
638 | // EntryValue: values at bit positions specified by EntryMask\r | |
639 | \r | |
640 | // Make sure we handle a section range that is unmapped\r | |
641 | EntryMask = TT_DESCRIPTOR_SECTION_TYPE_MASK | TT_DESCRIPTOR_SECTION_XN_MASK |\r | |
642 | TT_DESCRIPTOR_SECTION_AP_MASK;\r | |
643 | EntryValue = TT_DESCRIPTOR_SECTION_TYPE_SECTION;\r | |
644 | \r | |
645 | // Although the PI spec is unclear on this, the GCD guarantees that only\r | |
646 | // one Attribute bit is set at a time, so the order of the conditionals below\r | |
647 | // is irrelevant. If no memory attribute is specified, we preserve whatever\r | |
648 | // memory type is set in the page tables, and update the permission attributes\r | |
649 | // only.\r | |
650 | if (Attributes & EFI_MEMORY_UC) {\r | |
651 | // modify cacheability attributes\r | |
652 | EntryMask |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_MASK;\r | |
653 | // map to strongly ordered\r | |
654 | EntryValue |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_STRONGLY_ORDERED; // TEX[2:0] = 0, C=0, B=0\r | |
655 | } else if (Attributes & EFI_MEMORY_WC) {\r | |
656 | // modify cacheability attributes\r | |
657 | EntryMask |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_MASK;\r | |
658 | // map to normal non-cachable\r | |
659 | EntryValue |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_NON_CACHEABLE; // TEX [2:0]= 001 = 0x2, B=0, C=0\r | |
660 | } else if (Attributes & EFI_MEMORY_WT) {\r | |
661 | // modify cacheability attributes\r | |
662 | EntryMask |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_MASK;\r | |
663 | // write through with no-allocate\r | |
664 | EntryValue |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_WRITE_THROUGH_NO_ALLOC; // TEX [2:0] = 0, C=1, B=0\r | |
665 | } else if (Attributes & EFI_MEMORY_WB) {\r | |
666 | // modify cacheability attributes\r | |
667 | EntryMask |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_MASK;\r | |
668 | // write back (with allocate)\r | |
669 | EntryValue |= TT_DESCRIPTOR_SECTION_CACHE_POLICY_WRITE_BACK_ALLOC; // TEX [2:0] = 001, C=1, B=1\r | |
670 | } else if (Attributes & CACHE_ATTRIBUTE_MASK) {\r | |
671 | // catch unsupported memory type attributes\r | |
672 | ASSERT (FALSE);\r | |
673 | return EFI_UNSUPPORTED;\r | |
674 | }\r | |
675 | \r | |
676 | if (Attributes & EFI_MEMORY_RO) {\r | |
677 | EntryValue |= TT_DESCRIPTOR_SECTION_AP_RO_RO;\r | |
678 | } else {\r | |
679 | EntryValue |= TT_DESCRIPTOR_SECTION_AP_RW_RW;\r | |
680 | }\r | |
681 | \r | |
682 | if (Attributes & EFI_MEMORY_XP) {\r | |
683 | EntryValue |= TT_DESCRIPTOR_SECTION_XN_MASK;\r | |
684 | }\r | |
685 | \r | |
686 | // obtain page table base\r | |
687 | FirstLevelTable = (ARM_FIRST_LEVEL_DESCRIPTOR *)ArmGetTTBR0BaseAddress ();\r | |
688 | \r | |
689 | // calculate index into first level translation table for start of modification\r | |
690 | FirstLevelIdx = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(BaseAddress) >> TT_DESCRIPTOR_SECTION_BASE_SHIFT;\r | |
691 | ASSERT (FirstLevelIdx < TRANSLATION_TABLE_SECTION_COUNT);\r | |
692 | \r | |
693 | // calculate number of 1MB first level entries this applies to\r | |
694 | NumSections = Length / TT_DESCRIPTOR_SECTION_SIZE;\r | |
695 | \r | |
696 | // iterate through each descriptor\r | |
697 | for(i=0; i<NumSections; i++) {\r | |
698 | CurrentDescriptor = FirstLevelTable[FirstLevelIdx + i];\r | |
699 | \r | |
700 | // has this descriptor already been coverted to pages?\r | |
701 | if (TT_DESCRIPTOR_SECTION_TYPE_IS_PAGE_TABLE(CurrentDescriptor)) {\r | |
702 | // forward this 1MB range to page table function instead\r | |
703 | Status = UpdatePageEntries (\r | |
704 | (FirstLevelIdx + i) << TT_DESCRIPTOR_SECTION_BASE_SHIFT,\r | |
705 | TT_DESCRIPTOR_SECTION_SIZE,\r | |
706 | Attributes,\r | |
707 | NULL);\r | |
708 | } else {\r | |
709 | // still a section entry\r | |
710 | \r | |
711 | if (CurrentDescriptor != 0) {\r | |
712 | // mask off appropriate fields\r | |
713 | Descriptor = CurrentDescriptor & ~EntryMask;\r | |
714 | } else {\r | |
715 | Descriptor = ((UINTN)FirstLevelIdx + i) << TT_DESCRIPTOR_SECTION_BASE_SHIFT;\r | |
716 | }\r | |
717 | \r | |
718 | // mask in new attributes and/or permissions\r | |
719 | Descriptor |= EntryValue;\r | |
720 | \r | |
721 | if (CurrentDescriptor != Descriptor) {\r | |
722 | Mva = (VOID *)(UINTN)(((UINTN)FirstLevelIdx + i) << TT_DESCRIPTOR_SECTION_BASE_SHIFT);\r | |
723 | \r | |
724 | // Only need to update if we are changing the descriptor\r | |
725 | FirstLevelTable[FirstLevelIdx + i] = Descriptor;\r | |
726 | ArmUpdateTranslationTableEntry ((VOID *)&FirstLevelTable[FirstLevelIdx + i], Mva);\r | |
727 | }\r | |
728 | \r | |
729 | Status = EFI_SUCCESS;\r | |
730 | }\r | |
731 | }\r | |
732 | \r | |
733 | return Status;\r | |
734 | }\r | |
735 | \r | |
736 | EFI_STATUS\r | |
737 | ArmSetMemoryAttributes (\r | |
738 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
739 | IN UINT64 Length,\r | |
740 | IN UINT64 Attributes\r | |
741 | )\r | |
742 | {\r | |
743 | EFI_STATUS Status;\r | |
744 | UINT64 ChunkLength;\r | |
745 | BOOLEAN FlushTlbs;\r | |
746 | \r | |
747 | if (Length == 0) {\r | |
748 | return EFI_SUCCESS;\r | |
749 | }\r | |
750 | \r | |
751 | FlushTlbs = FALSE;\r | |
752 | while (Length > 0) {\r | |
753 | if ((BaseAddress % TT_DESCRIPTOR_SECTION_SIZE == 0) &&\r | |
754 | Length >= TT_DESCRIPTOR_SECTION_SIZE) {\r | |
755 | \r | |
756 | ChunkLength = Length - Length % TT_DESCRIPTOR_SECTION_SIZE;\r | |
757 | \r | |
758 | DEBUG ((DEBUG_PAGE,\r | |
759 | "SetMemoryAttributes(): MMU section 0x%lx length 0x%lx to %lx\n",\r | |
760 | BaseAddress, ChunkLength, Attributes));\r | |
761 | \r | |
762 | Status = UpdateSectionEntries (BaseAddress, ChunkLength, Attributes);\r | |
763 | \r | |
764 | FlushTlbs = TRUE;\r | |
765 | } else {\r | |
766 | \r | |
767 | //\r | |
768 | // Process page by page until the next section boundary, but only if\r | |
769 | // we have more than a section's worth of area to deal with after that.\r | |
770 | //\r | |
771 | ChunkLength = TT_DESCRIPTOR_SECTION_SIZE -\r | |
772 | (BaseAddress % TT_DESCRIPTOR_SECTION_SIZE);\r | |
773 | if (ChunkLength + TT_DESCRIPTOR_SECTION_SIZE > Length) {\r | |
774 | ChunkLength = Length;\r | |
775 | }\r | |
776 | \r | |
777 | DEBUG ((DEBUG_PAGE,\r | |
778 | "SetMemoryAttributes(): MMU page 0x%lx length 0x%lx to %lx\n",\r | |
779 | BaseAddress, ChunkLength, Attributes));\r | |
780 | \r | |
781 | Status = UpdatePageEntries (BaseAddress, ChunkLength, Attributes,\r | |
782 | &FlushTlbs);\r | |
783 | }\r | |
784 | \r | |
785 | if (EFI_ERROR (Status)) {\r | |
786 | break;\r | |
787 | }\r | |
788 | \r | |
789 | BaseAddress += ChunkLength;\r | |
790 | Length -= ChunkLength;\r | |
791 | }\r | |
792 | \r | |
793 | if (FlushTlbs) {\r | |
794 | ArmInvalidateTlb ();\r | |
795 | }\r | |
796 | return Status;\r | |
797 | }\r | |
798 | \r | |
799 | EFI_STATUS\r | |
800 | ArmSetMemoryRegionNoExec (\r | |
801 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
802 | IN UINT64 Length\r | |
803 | )\r | |
804 | {\r | |
805 | return ArmSetMemoryAttributes (BaseAddress, Length, EFI_MEMORY_XP);\r | |
806 | }\r | |
807 | \r | |
808 | EFI_STATUS\r | |
809 | ArmClearMemoryRegionNoExec (\r | |
810 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
811 | IN UINT64 Length\r | |
812 | )\r | |
813 | {\r | |
814 | return ArmSetMemoryAttributes (BaseAddress, Length, __EFI_MEMORY_RWX);\r | |
815 | }\r | |
816 | \r | |
817 | EFI_STATUS\r | |
818 | ArmSetMemoryRegionReadOnly (\r | |
819 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
820 | IN UINT64 Length\r | |
821 | )\r | |
822 | {\r | |
823 | return ArmSetMemoryAttributes (BaseAddress, Length, EFI_MEMORY_RO);\r | |
824 | }\r | |
825 | \r | |
826 | EFI_STATUS\r | |
827 | ArmClearMemoryRegionReadOnly (\r | |
828 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
829 | IN UINT64 Length\r | |
830 | )\r | |
831 | {\r | |
832 | return ArmSetMemoryAttributes (BaseAddress, Length, __EFI_MEMORY_RWX);\r | |
833 | }\r | |
834 | \r | |
835 | RETURN_STATUS\r | |
836 | EFIAPI\r | |
837 | ArmMmuBaseLibConstructor (\r | |
838 | VOID\r | |
839 | )\r | |
840 | {\r | |
841 | return RETURN_SUCCESS;\r | |
842 | }\r |