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49ba9447 | 1 | /**@file\r |
2 | Memory Detection for Virtual Machines.\r | |
3 | \r | |
4b455f7b | 4 | Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r |
56d7640a | 5 | This program and the accompanying materials\r |
49ba9447 | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | MemDetect.c\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | //\r | |
20 | // The package level header files this module uses\r | |
21 | //\r | |
22 | #include <PiPei.h>\r | |
23 | \r | |
24 | //\r | |
25 | // The Library classes this module consumes\r | |
26 | //\r | |
6a7cba79 | 27 | #include <Library/BaseMemoryLib.h>\r |
49ba9447 | 28 | #include <Library/DebugLib.h>\r |
29 | #include <Library/HobLib.h>\r | |
30 | #include <Library/IoLib.h>\r | |
c1c2669c | 31 | #include <Library/PcdLib.h>\r |
49ba9447 | 32 | #include <Library/PeimEntryPoint.h>\r |
33 | #include <Library/ResourcePublicationLib.h>\r | |
e8e5cd4a | 34 | #include <Library/MtrrLib.h>\r |
7e5b1b67 | 35 | #include <Library/QemuFwCfgLib.h>\r |
49ba9447 | 36 | \r |
37 | #include "Platform.h"\r | |
38 | #include "Cmos.h"\r | |
39 | \r | |
bc89fe48 LE |
40 | UINT8 mPhysMemAddressWidth;\r |
41 | \r | |
4b455f7b | 42 | UINT32\r |
c0e10976 | 43 | GetSystemMemorySizeBelow4gb (\r |
4b455f7b | 44 | VOID\r |
49ba9447 | 45 | )\r |
46 | {\r | |
47 | UINT8 Cmos0x34;\r | |
48 | UINT8 Cmos0x35;\r | |
49 | \r | |
50 | //\r | |
51 | // CMOS 0x34/0x35 specifies the system memory above 16 MB.\r | |
52 | // * CMOS(0x35) is the high byte\r | |
53 | // * CMOS(0x34) is the low byte\r | |
54 | // * The size is specified in 64kb chunks\r | |
55 | // * Since this is memory above 16MB, the 16MB must be added\r | |
56 | // into the calculation to get the total memory size.\r | |
57 | //\r | |
58 | \r | |
59 | Cmos0x34 = (UINT8) CmosRead8 (0x34);\r | |
60 | Cmos0x35 = (UINT8) CmosRead8 (0x35);\r | |
61 | \r | |
c4046161 | 62 | return (UINT32) (((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);\r |
49ba9447 | 63 | }\r |
64 | \r | |
65 | \r | |
c0e10976 | 66 | STATIC\r |
67 | UINT64\r | |
68 | GetSystemMemorySizeAbove4gb (\r | |
69 | )\r | |
70 | {\r | |
71 | UINT32 Size;\r | |
72 | UINTN CmosIndex;\r | |
73 | \r | |
74 | //\r | |
75 | // CMOS 0x5b-0x5d specifies the system memory above 4GB MB.\r | |
76 | // * CMOS(0x5d) is the most significant size byte\r | |
77 | // * CMOS(0x5c) is the middle size byte\r | |
78 | // * CMOS(0x5b) is the least significant size byte\r | |
79 | // * The size is specified in 64kb chunks\r | |
80 | //\r | |
81 | \r | |
82 | Size = 0;\r | |
83 | for (CmosIndex = 0x5d; CmosIndex >= 0x5b; CmosIndex--) {\r | |
84 | Size = (UINT32) (Size << 8) + (UINT32) CmosRead8 (CmosIndex);\r | |
85 | }\r | |
86 | \r | |
87 | return LShiftU64 (Size, 16);\r | |
88 | }\r | |
89 | \r | |
bc89fe48 | 90 | \r |
d5371680 LE |
91 | /**\r |
92 | Return the highest address that DXE could possibly use, plus one.\r | |
93 | **/\r | |
94 | STATIC\r | |
95 | UINT64\r | |
96 | GetFirstNonAddress (\r | |
97 | VOID\r | |
98 | )\r | |
99 | {\r | |
100 | UINT64 FirstNonAddress;\r | |
7e5b1b67 LE |
101 | UINT64 Pci64Base, Pci64Size;\r |
102 | CHAR8 MbString[7 + 1];\r | |
103 | EFI_STATUS Status;\r | |
104 | FIRMWARE_CONFIG_ITEM FwCfgItem;\r | |
105 | UINTN FwCfgSize;\r | |
106 | UINT64 HotPlugMemoryEnd;\r | |
d5371680 LE |
107 | \r |
108 | FirstNonAddress = BASE_4GB + GetSystemMemorySizeAbove4gb ();\r | |
7e5b1b67 LE |
109 | \r |
110 | //\r | |
111 | // If DXE is 32-bit, then we're done; PciBusDxe will degrade 64-bit MMIO\r | |
112 | // resources to 32-bit anyway. See DegradeResource() in\r | |
113 | // "PciResourceSupport.c".\r | |
114 | //\r | |
115 | #ifdef MDE_CPU_IA32\r | |
116 | if (!FeaturePcdGet (PcdDxeIplSwitchToLongMode)) {\r | |
117 | return FirstNonAddress;\r | |
118 | }\r | |
119 | #endif\r | |
120 | \r | |
121 | //\r | |
122 | // Otherwise, in order to calculate the highest address plus one, we must\r | |
123 | // consider the 64-bit PCI host aperture too. Fetch the default size.\r | |
124 | //\r | |
125 | Pci64Size = PcdGet64 (PcdPciMmio64Size);\r | |
126 | \r | |
127 | //\r | |
128 | // See if the user specified the number of megabytes for the 64-bit PCI host\r | |
129 | // aperture. The number of non-NUL characters in MbString allows for\r | |
130 | // 9,999,999 MB, which is approximately 10 TB.\r | |
131 | //\r | |
132 | // As signaled by the "X-" prefix, this knob is experimental, and might go\r | |
133 | // away at any time.\r | |
134 | //\r | |
135 | Status = QemuFwCfgFindFile ("opt/ovmf/X-PciMmio64Mb", &FwCfgItem,\r | |
136 | &FwCfgSize);\r | |
137 | if (!EFI_ERROR (Status)) {\r | |
138 | if (FwCfgSize >= sizeof MbString) {\r | |
139 | DEBUG ((EFI_D_WARN,\r | |
140 | "%a: ignoring malformed 64-bit PCI host aperture size from fw_cfg\n",\r | |
141 | __FUNCTION__));\r | |
142 | } else {\r | |
143 | QemuFwCfgSelectItem (FwCfgItem);\r | |
144 | QemuFwCfgReadBytes (FwCfgSize, MbString);\r | |
145 | MbString[FwCfgSize] = '\0';\r | |
146 | Pci64Size = LShiftU64 (AsciiStrDecimalToUint64 (MbString), 20);\r | |
147 | }\r | |
148 | }\r | |
149 | \r | |
150 | if (Pci64Size == 0) {\r | |
151 | if (mBootMode != BOOT_ON_S3_RESUME) {\r | |
152 | DEBUG ((EFI_D_INFO, "%a: disabling 64-bit PCI host aperture\n",\r | |
153 | __FUNCTION__));\r | |
154 | PcdSet64 (PcdPciMmio64Size, 0);\r | |
155 | }\r | |
156 | \r | |
157 | //\r | |
158 | // There's nothing more to do; the amount of memory above 4GB fully\r | |
159 | // determines the highest address plus one. The memory hotplug area (see\r | |
160 | // below) plays no role for the firmware in this case.\r | |
161 | //\r | |
162 | return FirstNonAddress;\r | |
163 | }\r | |
164 | \r | |
165 | //\r | |
166 | // The "etc/reserved-memory-end" fw_cfg file, when present, contains an\r | |
167 | // absolute, exclusive end address for the memory hotplug area. This area\r | |
168 | // starts right at the end of the memory above 4GB. The 64-bit PCI host\r | |
169 | // aperture must be placed above it.\r | |
170 | //\r | |
171 | Status = QemuFwCfgFindFile ("etc/reserved-memory-end", &FwCfgItem,\r | |
172 | &FwCfgSize);\r | |
173 | if (!EFI_ERROR (Status) && FwCfgSize == sizeof HotPlugMemoryEnd) {\r | |
174 | QemuFwCfgSelectItem (FwCfgItem);\r | |
175 | QemuFwCfgReadBytes (FwCfgSize, &HotPlugMemoryEnd);\r | |
176 | \r | |
177 | ASSERT (HotPlugMemoryEnd >= FirstNonAddress);\r | |
178 | FirstNonAddress = HotPlugMemoryEnd;\r | |
179 | }\r | |
180 | \r | |
181 | //\r | |
182 | // SeaBIOS aligns both boundaries of the 64-bit PCI host aperture to 1GB, so\r | |
183 | // that the host can map it with 1GB hugepages. Follow suit.\r | |
184 | //\r | |
185 | Pci64Base = ALIGN_VALUE (FirstNonAddress, (UINT64)SIZE_1GB);\r | |
186 | Pci64Size = ALIGN_VALUE (Pci64Size, (UINT64)SIZE_1GB);\r | |
187 | \r | |
188 | //\r | |
189 | // The 64-bit PCI host aperture should also be "naturally" aligned. The\r | |
190 | // alignment is determined by rounding the size of the aperture down to the\r | |
191 | // next smaller or equal power of two. That is, align the aperture by the\r | |
192 | // largest BAR size that can fit into it.\r | |
193 | //\r | |
194 | Pci64Base = ALIGN_VALUE (Pci64Base, GetPowerOfTwo64 (Pci64Size));\r | |
195 | \r | |
196 | if (mBootMode != BOOT_ON_S3_RESUME) {\r | |
197 | //\r | |
198 | // The core PciHostBridgeDxe driver will automatically add this range to\r | |
199 | // the GCD memory space map through our PciHostBridgeLib instance; here we\r | |
200 | // only need to set the PCDs.\r | |
201 | //\r | |
202 | PcdSet64 (PcdPciMmio64Base, Pci64Base);\r | |
203 | PcdSet64 (PcdPciMmio64Size, Pci64Size);\r | |
204 | DEBUG ((EFI_D_INFO, "%a: Pci64Base=0x%Lx Pci64Size=0x%Lx\n",\r | |
205 | __FUNCTION__, Pci64Base, Pci64Size));\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // The useful address space ends with the 64-bit PCI host aperture.\r | |
210 | //\r | |
211 | FirstNonAddress = Pci64Base + Pci64Size;\r | |
d5371680 LE |
212 | return FirstNonAddress;\r |
213 | }\r | |
214 | \r | |
215 | \r | |
bc89fe48 LE |
216 | /**\r |
217 | Initialize the mPhysMemAddressWidth variable, based on guest RAM size.\r | |
218 | **/\r | |
219 | VOID\r | |
220 | AddressWidthInitialization (\r | |
221 | VOID\r | |
222 | )\r | |
223 | {\r | |
224 | UINT64 FirstNonAddress;\r | |
225 | \r | |
226 | //\r | |
227 | // As guest-physical memory size grows, the permanent PEI RAM requirements\r | |
228 | // are dominated by the identity-mapping page tables built by the DXE IPL.\r | |
229 | // The DXL IPL keys off of the physical address bits advertized in the CPU\r | |
230 | // HOB. To conserve memory, we calculate the minimum address width here.\r | |
231 | //\r | |
d5371680 | 232 | FirstNonAddress = GetFirstNonAddress ();\r |
bc89fe48 LE |
233 | mPhysMemAddressWidth = (UINT8)HighBitSet64 (FirstNonAddress);\r |
234 | \r | |
235 | //\r | |
236 | // If FirstNonAddress is not an integral power of two, then we need an\r | |
237 | // additional bit.\r | |
238 | //\r | |
239 | if ((FirstNonAddress & (FirstNonAddress - 1)) != 0) {\r | |
240 | ++mPhysMemAddressWidth;\r | |
241 | }\r | |
242 | \r | |
243 | //\r | |
244 | // The minimum address width is 36 (covers up to and excluding 64 GB, which\r | |
245 | // is the maximum for Ia32 + PAE). The theoretical architecture maximum for\r | |
246 | // X64 long mode is 52 bits, but the DXE IPL clamps that down to 48 bits. We\r | |
247 | // can simply assert that here, since 48 bits are good enough for 256 TB.\r | |
248 | //\r | |
249 | if (mPhysMemAddressWidth <= 36) {\r | |
250 | mPhysMemAddressWidth = 36;\r | |
251 | }\r | |
252 | ASSERT (mPhysMemAddressWidth <= 48);\r | |
253 | }\r | |
254 | \r | |
255 | \r | |
256 | /**\r | |
257 | Calculate the cap for the permanent PEI memory.\r | |
258 | **/\r | |
259 | STATIC\r | |
260 | UINT32\r | |
261 | GetPeiMemoryCap (\r | |
262 | VOID\r | |
263 | )\r | |
264 | {\r | |
265 | BOOLEAN Page1GSupport;\r | |
266 | UINT32 RegEax;\r | |
267 | UINT32 RegEdx;\r | |
268 | UINT32 Pml4Entries;\r | |
269 | UINT32 PdpEntries;\r | |
270 | UINTN TotalPages;\r | |
271 | \r | |
272 | //\r | |
273 | // If DXE is 32-bit, then just return the traditional 64 MB cap.\r | |
274 | //\r | |
275 | #ifdef MDE_CPU_IA32\r | |
276 | if (!FeaturePcdGet (PcdDxeIplSwitchToLongMode)) {\r | |
277 | return SIZE_64MB;\r | |
278 | }\r | |
279 | #endif\r | |
280 | \r | |
281 | //\r | |
282 | // Dependent on physical address width, PEI memory allocations can be\r | |
283 | // dominated by the page tables built for 64-bit DXE. So we key the cap off\r | |
284 | // of those. The code below is based on CreateIdentityMappingPageTables() in\r | |
285 | // "MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c".\r | |
286 | //\r | |
287 | Page1GSupport = FALSE;\r | |
288 | if (PcdGetBool (PcdUse1GPageTable)) {\r | |
289 | AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);\r | |
290 | if (RegEax >= 0x80000001) {\r | |
291 | AsmCpuid (0x80000001, NULL, NULL, NULL, &RegEdx);\r | |
292 | if ((RegEdx & BIT26) != 0) {\r | |
293 | Page1GSupport = TRUE;\r | |
294 | }\r | |
295 | }\r | |
296 | }\r | |
297 | \r | |
298 | if (mPhysMemAddressWidth <= 39) {\r | |
299 | Pml4Entries = 1;\r | |
300 | PdpEntries = 1 << (mPhysMemAddressWidth - 30);\r | |
301 | ASSERT (PdpEntries <= 0x200);\r | |
302 | } else {\r | |
303 | Pml4Entries = 1 << (mPhysMemAddressWidth - 39);\r | |
304 | ASSERT (Pml4Entries <= 0x200);\r | |
305 | PdpEntries = 512;\r | |
306 | }\r | |
307 | \r | |
308 | TotalPages = Page1GSupport ? Pml4Entries + 1 :\r | |
309 | (PdpEntries + 1) * Pml4Entries + 1;\r | |
310 | ASSERT (TotalPages <= 0x40201);\r | |
311 | \r | |
312 | //\r | |
313 | // Add 64 MB for miscellaneous allocations. Note that for\r | |
314 | // mPhysMemAddressWidth values close to 36, the cap will actually be\r | |
315 | // dominated by this increment.\r | |
316 | //\r | |
317 | return (UINT32)(EFI_PAGES_TO_SIZE (TotalPages) + SIZE_64MB);\r | |
318 | }\r | |
319 | \r | |
320 | \r | |
36658fff WL |
321 | /**\r |
322 | Publish PEI core memory\r | |
323 | \r | |
324 | @return EFI_SUCCESS The PEIM initialized successfully.\r | |
325 | \r | |
326 | **/\r | |
327 | EFI_STATUS\r | |
328 | PublishPeiMemory (\r | |
329 | VOID\r | |
330 | )\r | |
331 | {\r | |
332 | EFI_STATUS Status;\r | |
333 | EFI_PHYSICAL_ADDRESS MemoryBase;\r | |
334 | UINT64 MemorySize;\r | |
335 | UINT64 LowerMemorySize;\r | |
bc89fe48 | 336 | UINT32 PeiMemoryCap;\r |
36658fff | 337 | \r |
8e54500f JJ |
338 | if (mBootMode == BOOT_ON_S3_RESUME) {\r |
339 | MemoryBase = PcdGet32 (PcdS3AcpiReservedMemoryBase);\r | |
340 | MemorySize = PcdGet32 (PcdS3AcpiReservedMemorySize);\r | |
341 | } else {\r | |
342 | LowerMemorySize = GetSystemMemorySizeBelow4gb ();\r | |
b09c1c6f LE |
343 | if (FeaturePcdGet (PcdSmmSmramRequire)) {\r |
344 | //\r | |
345 | // TSEG is chipped from the end of low RAM\r | |
346 | //\r | |
347 | LowerMemorySize -= FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r | |
348 | }\r | |
8e54500f | 349 | \r |
bc89fe48 LE |
350 | PeiMemoryCap = GetPeiMemoryCap ();\r |
351 | DEBUG ((EFI_D_INFO, "%a: mPhysMemAddressWidth=%d PeiMemoryCap=%u KB\n",\r | |
352 | __FUNCTION__, mPhysMemAddressWidth, PeiMemoryCap >> 10));\r | |
353 | \r | |
8e54500f JJ |
354 | //\r |
355 | // Determine the range of memory to use during PEI\r | |
356 | //\r | |
efb0f16e LE |
357 | // Technically we could lay the permanent PEI RAM over SEC's temporary\r |
358 | // decompression and scratch buffer even if "secure S3" is needed, since\r | |
359 | // their lifetimes don't overlap. However, PeiFvInitialization() will cover\r | |
360 | // RAM up to PcdOvmfDecompressionScratchEnd with an EfiACPIMemoryNVS memory\r | |
361 | // allocation HOB, and other allocations served from the permanent PEI RAM\r | |
362 | // shouldn't overlap with that HOB.\r | |
363 | //\r | |
364 | MemoryBase = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire) ?\r | |
365 | PcdGet32 (PcdOvmfDecompressionScratchEnd) :\r | |
366 | PcdGet32 (PcdOvmfDxeMemFvBase) + PcdGet32 (PcdOvmfDxeMemFvSize);\r | |
8e54500f | 367 | MemorySize = LowerMemorySize - MemoryBase;\r |
bc89fe48 LE |
368 | if (MemorySize > PeiMemoryCap) {\r |
369 | MemoryBase = LowerMemorySize - PeiMemoryCap;\r | |
370 | MemorySize = PeiMemoryCap;\r | |
8e54500f | 371 | }\r |
36658fff WL |
372 | }\r |
373 | \r | |
374 | //\r | |
375 | // Publish this memory to the PEI Core\r | |
376 | //\r | |
377 | Status = PublishSystemMemory(MemoryBase, MemorySize);\r | |
378 | ASSERT_EFI_ERROR (Status);\r | |
379 | \r | |
380 | return Status;\r | |
381 | }\r | |
382 | \r | |
c0e10976 | 383 | \r |
49ba9447 | 384 | /**\r |
c034906e | 385 | Peform Memory Detection for QEMU / KVM\r |
49ba9447 | 386 | \r |
387 | **/\r | |
c034906e JJ |
388 | STATIC\r |
389 | VOID\r | |
390 | QemuInitializeRam (\r | |
391 | VOID\r | |
49ba9447 | 392 | )\r |
393 | {\r | |
c0e10976 | 394 | UINT64 LowerMemorySize;\r |
395 | UINT64 UpperMemorySize;\r | |
79d274b8 LE |
396 | MTRR_SETTINGS MtrrSettings;\r |
397 | EFI_STATUS Status;\r | |
49ba9447 | 398 | \r |
c034906e | 399 | DEBUG ((EFI_D_INFO, "%a called\n", __FUNCTION__));\r |
49ba9447 | 400 | \r |
401 | //\r | |
402 | // Determine total memory size available\r | |
403 | //\r | |
c0e10976 | 404 | LowerMemorySize = GetSystemMemorySizeBelow4gb ();\r |
405 | UpperMemorySize = GetSystemMemorySizeAbove4gb ();\r | |
49ba9447 | 406 | \r |
bd386eaf JJ |
407 | if (mBootMode != BOOT_ON_S3_RESUME) {\r |
408 | //\r | |
409 | // Create memory HOBs\r | |
410 | //\r | |
bd386eaf | 411 | AddMemoryRangeHob (0, BASE_512KB + BASE_128KB);\r |
b09c1c6f LE |
412 | \r |
413 | if (FeaturePcdGet (PcdSmmSmramRequire)) {\r | |
414 | UINT32 TsegSize;\r | |
415 | \r | |
416 | TsegSize = FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r | |
417 | AddMemoryRangeHob (BASE_1MB, LowerMemorySize - TsegSize);\r | |
418 | AddReservedMemoryBaseSizeHob (LowerMemorySize - TsegSize, TsegSize,\r | |
419 | TRUE);\r | |
420 | } else {\r | |
421 | AddMemoryRangeHob (BASE_1MB, LowerMemorySize);\r | |
422 | }\r | |
423 | \r | |
cfc80e2e LE |
424 | if (UpperMemorySize != 0) {\r |
425 | AddUntestedMemoryBaseSizeHob (BASE_4GB, UpperMemorySize);\r | |
426 | }\r | |
bd386eaf | 427 | }\r |
49ba9447 | 428 | \r |
79d274b8 LE |
429 | //\r |
430 | // We'd like to keep the following ranges uncached:\r | |
431 | // - [640 KB, 1 MB)\r | |
432 | // - [LowerMemorySize, 4 GB)\r | |
433 | //\r | |
434 | // Everything else should be WB. Unfortunately, programming the inverse (ie.\r | |
435 | // keeping the default UC, and configuring the complement set of the above as\r | |
436 | // WB) is not reliable in general, because the end of the upper RAM can have\r | |
437 | // practically any alignment, and we may not have enough variable MTRRs to\r | |
438 | // cover it exactly.\r | |
439 | //\r | |
440 | if (IsMtrrSupported ()) {\r | |
441 | MtrrGetAllMtrrs (&MtrrSettings);\r | |
442 | \r | |
443 | //\r | |
444 | // MTRRs disabled, fixed MTRRs disabled, default type is uncached\r | |
445 | //\r | |
446 | ASSERT ((MtrrSettings.MtrrDefType & BIT11) == 0);\r | |
447 | ASSERT ((MtrrSettings.MtrrDefType & BIT10) == 0);\r | |
448 | ASSERT ((MtrrSettings.MtrrDefType & 0xFF) == 0);\r | |
449 | \r | |
450 | //\r | |
451 | // flip default type to writeback\r | |
452 | //\r | |
453 | SetMem (&MtrrSettings.Fixed, sizeof MtrrSettings.Fixed, 0x06);\r | |
454 | ZeroMem (&MtrrSettings.Variables, sizeof MtrrSettings.Variables);\r | |
455 | MtrrSettings.MtrrDefType |= BIT11 | BIT10 | 6;\r | |
456 | MtrrSetAllMtrrs (&MtrrSettings);\r | |
e8e5cd4a | 457 | \r |
79d274b8 LE |
458 | //\r |
459 | // Set memory range from 640KB to 1MB to uncacheable\r | |
460 | //\r | |
461 | Status = MtrrSetMemoryAttribute (BASE_512KB + BASE_128KB,\r | |
462 | BASE_1MB - (BASE_512KB + BASE_128KB), CacheUncacheable);\r | |
463 | ASSERT_EFI_ERROR (Status);\r | |
e8e5cd4a | 464 | \r |
79d274b8 LE |
465 | //\r |
466 | // Set memory range from the "top of lower RAM" (RAM below 4GB) to 4GB as\r | |
467 | // uncacheable\r | |
468 | //\r | |
469 | Status = MtrrSetMemoryAttribute (LowerMemorySize,\r | |
470 | SIZE_4GB - LowerMemorySize, CacheUncacheable);\r | |
471 | ASSERT_EFI_ERROR (Status);\r | |
c0e10976 | 472 | }\r |
49ba9447 | 473 | }\r |
474 | \r | |
c034906e JJ |
475 | /**\r |
476 | Publish system RAM and reserve memory regions\r | |
477 | \r | |
478 | **/\r | |
479 | VOID\r | |
480 | InitializeRamRegions (\r | |
481 | VOID\r | |
482 | )\r | |
483 | {\r | |
2818c158 JJ |
484 | if (!mXen) {\r |
485 | QemuInitializeRam ();\r | |
486 | } else {\r | |
2818c158 JJ |
487 | XenPublishRamRegions ();\r |
488 | }\r | |
8e54500f JJ |
489 | \r |
490 | if (mS3Supported && mBootMode != BOOT_ON_S3_RESUME) {\r | |
491 | //\r | |
492 | // This is the memory range that will be used for PEI on S3 resume\r | |
493 | //\r | |
494 | BuildMemoryAllocationHob (\r | |
495 | (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdS3AcpiReservedMemoryBase),\r | |
496 | (UINT64)(UINTN) PcdGet32 (PcdS3AcpiReservedMemorySize),\r | |
497 | EfiACPIMemoryNVS\r | |
498 | );\r | |
e249f906 LE |
499 | \r |
500 | //\r | |
501 | // Cover the initial RAM area used as stack and temporary PEI heap.\r | |
502 | //\r | |
503 | // This is reserved as ACPI NVS so it can be used on S3 resume.\r | |
504 | //\r | |
505 | BuildMemoryAllocationHob (\r | |
506 | PcdGet32 (PcdOvmfSecPeiTempRamBase),\r | |
507 | PcdGet32 (PcdOvmfSecPeiTempRamSize),\r | |
508 | EfiACPIMemoryNVS\r | |
509 | );\r | |
78a38b73 | 510 | \r |
ad43bc6b LE |
511 | //\r |
512 | // SEC stores its table of GUIDed section handlers here.\r | |
513 | //\r | |
514 | BuildMemoryAllocationHob (\r | |
515 | PcdGet64 (PcdGuidedExtractHandlerTableAddress),\r | |
516 | PcdGet32 (PcdGuidedExtractHandlerTableSize),\r | |
517 | EfiACPIMemoryNVS\r | |
518 | );\r | |
519 | \r | |
78a38b73 LE |
520 | #ifdef MDE_CPU_X64\r |
521 | //\r | |
522 | // Reserve the initial page tables built by the reset vector code.\r | |
523 | //\r | |
524 | // Since this memory range will be used by the Reset Vector on S3\r | |
525 | // resume, it must be reserved as ACPI NVS.\r | |
526 | //\r | |
527 | BuildMemoryAllocationHob (\r | |
528 | (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfSecPageTablesBase),\r | |
529 | (UINT64)(UINTN) PcdGet32 (PcdOvmfSecPageTablesSize),\r | |
530 | EfiACPIMemoryNVS\r | |
531 | );\r | |
532 | #endif\r | |
0e8a31f5 | 533 | }\r |
6a7cba79 | 534 | \r |
0e8a31f5 | 535 | if (mBootMode != BOOT_ON_S3_RESUME) {\r |
1a7edbbc LE |
536 | if (!FeaturePcdGet (PcdSmmSmramRequire)) {\r |
537 | //\r | |
538 | // Reserve the lock box storage area\r | |
539 | //\r | |
540 | // Since this memory range will be used on S3 resume, it must be\r | |
541 | // reserved as ACPI NVS.\r | |
542 | //\r | |
543 | // If S3 is unsupported, then various drivers might still write to the\r | |
544 | // LockBox area. We ought to prevent DXE from serving allocation requests\r | |
545 | // such that they would overlap the LockBox storage.\r | |
546 | //\r | |
547 | ZeroMem (\r | |
548 | (VOID*)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r | |
549 | (UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize)\r | |
550 | );\r | |
551 | BuildMemoryAllocationHob (\r | |
552 | (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r | |
553 | (UINT64)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize),\r | |
554 | mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData\r | |
555 | );\r | |
556 | }\r | |
b09c1c6f LE |
557 | \r |
558 | if (FeaturePcdGet (PcdSmmSmramRequire)) {\r | |
559 | UINT32 TsegSize;\r | |
560 | \r | |
561 | //\r | |
562 | // Make sure the TSEG area that we reported as a reserved memory resource\r | |
563 | // cannot be used for reserved memory allocations.\r | |
564 | //\r | |
565 | TsegSize = FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r | |
566 | BuildMemoryAllocationHob (\r | |
567 | GetSystemMemorySizeBelow4gb() - TsegSize,\r | |
568 | TsegSize,\r | |
569 | EfiReservedMemoryType\r | |
570 | );\r | |
571 | }\r | |
8e54500f | 572 | }\r |
c034906e | 573 | }\r |