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3b96221f AP |
1 | /**@file\r |
2 | Xen Platform PEI support\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r | |
6 | Copyright (c) 2019, Citrix Systems, Inc.\r | |
7 | \r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | \r | |
10 | **/\r | |
11 | \r | |
12 | //\r | |
13 | // The package level header files this module uses\r | |
14 | //\r | |
15 | #include <PiPei.h>\r | |
16 | \r | |
17 | //\r | |
18 | // The Library classes this module consumes\r | |
19 | //\r | |
51e0bd28 AP |
20 | #include <Library/BaseMemoryLib.h>\r |
21 | #include <Library/CpuLib.h>\r | |
3b96221f AP |
22 | #include <Library/DebugLib.h>\r |
23 | #include <Library/HobLib.h>\r | |
c75c6405 | 24 | #include <Library/LocalApicLib.h>\r |
3b96221f AP |
25 | #include <Library/MemoryAllocationLib.h>\r |
26 | #include <Library/PcdLib.h>\r | |
c75c6405 | 27 | #include <Library/SafeIntLib.h>\r |
3b96221f AP |
28 | #include <Guid/XenInfo.h>\r |
29 | #include <IndustryStandard/E820.h>\r | |
30 | #include <Library/ResourcePublicationLib.h>\r | |
31 | #include <Library/MtrrLib.h>\r | |
51e0bd28 | 32 | #include <IndustryStandard/PageTable.h>\r |
60d26545 | 33 | #include <IndustryStandard/Xen/arch-x86/hvm/start_info.h>\r |
80b619d5 | 34 | #include <Library/XenHypercallLib.h>\r |
a749e1f9 | 35 | #include <IndustryStandard/Xen/memory.h>\r |
3b96221f AP |
36 | \r |
37 | #include "Platform.h"\r | |
38 | #include "Xen.h"\r | |
39 | \r | |
ac0a286f | 40 | STATIC UINT32 mXenLeaf = 0;\r |
3b96221f | 41 | \r |
ac0a286f | 42 | EFI_XEN_INFO mXenInfo;\r |
3b96221f | 43 | \r |
8651e1ce AP |
44 | //\r |
45 | // Location of the firmware info struct setup by hvmloader.\r | |
46 | // Only the E820 table is used by OVMF.\r | |
47 | //\r | |
ac0a286f MK |
48 | EFI_XEN_OVMF_INFO *mXenHvmloaderInfo;\r |
49 | STATIC EFI_E820_ENTRY64 mE820Entries[128];\r | |
50 | STATIC UINT32 mE820EntriesCount;\r | |
8651e1ce | 51 | \r |
3b96221f AP |
52 | /**\r |
53 | Returns E820 map provided by Xen\r | |
54 | \r | |
55 | @param Entries Pointer to E820 map\r | |
56 | @param Count Number of entries\r | |
57 | \r | |
58 | @return EFI_STATUS\r | |
59 | **/\r | |
60 | EFI_STATUS\r | |
61 | XenGetE820Map (\r | |
ac0a286f MK |
62 | EFI_E820_ENTRY64 **Entries,\r |
63 | UINT32 *Count\r | |
3b96221f AP |
64 | )\r |
65 | {\r | |
ac0a286f MK |
66 | INTN ReturnCode;\r |
67 | xen_memory_map_t Parameters;\r | |
68 | UINTN LoopIndex;\r | |
69 | UINTN Index;\r | |
70 | EFI_E820_ENTRY64 TmpEntry;\r | |
a749e1f9 | 71 | \r |
594b5002 AP |
72 | //\r |
73 | // Get E820 produced by hvmloader\r | |
74 | //\r | |
75 | if (mXenHvmloaderInfo != NULL) {\r | |
76 | ASSERT (mXenHvmloaderInfo->E820 < MAX_ADDRESS);\r | |
ac0a286f MK |
77 | *Entries = (EFI_E820_ENTRY64 *)(UINTN)mXenHvmloaderInfo->E820;\r |
78 | *Count = mXenHvmloaderInfo->E820EntriesCount;\r | |
594b5002 AP |
79 | \r |
80 | return EFI_SUCCESS;\r | |
3b96221f AP |
81 | }\r |
82 | \r | |
a749e1f9 AP |
83 | //\r |
84 | // Otherwise, get the E820 table from the Xen hypervisor\r | |
85 | //\r | |
86 | \r | |
87 | if (mE820EntriesCount > 0) {\r | |
88 | *Entries = mE820Entries;\r | |
ac0a286f | 89 | *Count = mE820EntriesCount;\r |
a749e1f9 AP |
90 | return EFI_SUCCESS;\r |
91 | }\r | |
92 | \r | |
93 | Parameters.nr_entries = 128;\r | |
94 | set_xen_guest_handle (Parameters.buffer, mE820Entries);\r | |
95 | \r | |
96 | // Returns a errno\r | |
97 | ReturnCode = XenHypercallMemoryOp (XENMEM_memory_map, &Parameters);\r | |
98 | ASSERT (ReturnCode == 0);\r | |
99 | \r | |
100 | mE820EntriesCount = Parameters.nr_entries;\r | |
101 | \r | |
102 | //\r | |
103 | // Sort E820 entries\r | |
104 | //\r | |
105 | for (LoopIndex = 1; LoopIndex < mE820EntriesCount; LoopIndex++) {\r | |
106 | for (Index = LoopIndex; Index < mE820EntriesCount; Index++) {\r | |
107 | if (mE820Entries[Index - 1].BaseAddr > mE820Entries[Index].BaseAddr) {\r | |
ac0a286f MK |
108 | TmpEntry = mE820Entries[Index];\r |
109 | mE820Entries[Index] = mE820Entries[Index - 1];\r | |
a749e1f9 AP |
110 | mE820Entries[Index - 1] = TmpEntry;\r |
111 | }\r | |
112 | }\r | |
113 | }\r | |
114 | \r | |
ac0a286f | 115 | *Count = mE820EntriesCount;\r |
a749e1f9 AP |
116 | *Entries = mE820Entries;\r |
117 | \r | |
118 | return EFI_SUCCESS;\r | |
3b96221f AP |
119 | }\r |
120 | \r | |
121 | /**\r | |
122 | Connects to the Hypervisor.\r | |
123 | \r | |
3b96221f AP |
124 | @return EFI_STATUS\r |
125 | \r | |
126 | **/\r | |
127 | EFI_STATUS\r | |
128 | XenConnect (\r | |
3b96221f AP |
129 | )\r |
130 | {\r | |
ac0a286f MK |
131 | UINT32 Index;\r |
132 | UINT32 TransferReg;\r | |
133 | UINT32 TransferPages;\r | |
134 | UINT32 XenVersion;\r | |
135 | EFI_XEN_OVMF_INFO *Info;\r | |
136 | CHAR8 Sig[sizeof (Info->Signature) + 1];\r | |
137 | UINT32 *PVHResetVectorData;\r | |
138 | RETURN_STATUS Status;\r | |
3b96221f | 139 | \r |
12998837 AP |
140 | ASSERT (mXenLeaf != 0);\r |
141 | \r | |
142 | //\r | |
143 | // Prepare HyperPages to be able to make hypercalls\r | |
144 | //\r | |
145 | \r | |
146 | AsmCpuid (mXenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);\r | |
3b96221f AP |
147 | mXenInfo.HyperPages = AllocatePages (TransferPages);\r |
148 | if (!mXenInfo.HyperPages) {\r | |
149 | return EFI_OUT_OF_RESOURCES;\r | |
150 | }\r | |
151 | \r | |
152 | for (Index = 0; Index < TransferPages; Index++) {\r | |
ac0a286f MK |
153 | AsmWriteMsr64 (\r |
154 | TransferReg,\r | |
155 | (UINTN)mXenInfo.HyperPages +\r | |
156 | (Index << EFI_PAGE_SHIFT) + Index\r | |
157 | );\r | |
3b96221f AP |
158 | }\r |
159 | \r | |
12998837 AP |
160 | //\r |
161 | // Find out the Xen version\r | |
162 | //\r | |
163 | \r | |
164 | AsmCpuid (mXenLeaf + 1, &XenVersion, NULL, NULL, NULL);\r | |
ac0a286f MK |
165 | DEBUG ((\r |
166 | DEBUG_ERROR,\r | |
167 | "Detected Xen version %d.%d\n",\r | |
168 | XenVersion >> 16,\r | |
169 | XenVersion & 0xFFFF\r | |
170 | ));\r | |
3b96221f AP |
171 | mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r |
172 | mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r | |
173 | \r | |
8651e1ce AP |
174 | //\r |
175 | // Check if there are information left by hvmloader\r | |
176 | //\r | |
177 | \r | |
ac0a286f | 178 | Info = (EFI_XEN_OVMF_INFO *)(UINTN)OVMF_INFO_PHYSICAL_ADDRESS;\r |
8651e1ce AP |
179 | //\r |
180 | // Copy the signature, and make it null-terminated.\r | |
181 | //\r | |
ac0a286f MK |
182 | AsciiStrnCpyS (\r |
183 | Sig,\r | |
184 | sizeof (Sig),\r | |
185 | (CHAR8 *)&Info->Signature,\r | |
186 | sizeof (Info->Signature)\r | |
187 | );\r | |
8651e1ce AP |
188 | if (AsciiStrCmp (Sig, "XenHVMOVMF") == 0) {\r |
189 | mXenHvmloaderInfo = Info;\r | |
190 | } else {\r | |
191 | mXenHvmloaderInfo = NULL;\r | |
192 | }\r | |
3b96221f | 193 | \r |
60d26545 AP |
194 | mXenInfo.RsdpPvh = NULL;\r |
195 | \r | |
196 | //\r | |
197 | // Locate and use information from the start of day structure if we have\r | |
198 | // booted via the PVH entry point.\r | |
199 | //\r | |
200 | \r | |
ac0a286f | 201 | PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);\r |
60d26545 AP |
202 | //\r |
203 | // That magic value is written in XenResetVector/Ia32/XenPVHMain.asm\r | |
204 | //\r | |
205 | if (PVHResetVectorData[1] == SIGNATURE_32 ('X', 'P', 'V', 'H')) {\r | |
ac0a286f | 206 | struct hvm_start_info *HVMStartInfo;\r |
60d26545 | 207 | \r |
ac0a286f | 208 | HVMStartInfo = (VOID *)(UINTN)PVHResetVectorData[0];\r |
60d26545 AP |
209 | if (HVMStartInfo->magic == XEN_HVM_START_MAGIC_VALUE) {\r |
210 | ASSERT (HVMStartInfo->rsdp_paddr != 0);\r | |
211 | if (HVMStartInfo->rsdp_paddr != 0) {\r | |
212 | mXenInfo.RsdpPvh = (VOID *)(UINTN)HVMStartInfo->rsdp_paddr;\r | |
213 | }\r | |
214 | }\r | |
215 | }\r | |
216 | \r | |
3b96221f AP |
217 | BuildGuidDataHob (\r |
218 | &gEfiXenInfoGuid,\r | |
219 | &mXenInfo,\r | |
ac0a286f | 220 | sizeof (mXenInfo)\r |
3b96221f AP |
221 | );\r |
222 | \r | |
80b619d5 AP |
223 | //\r |
224 | // Initialize the XenHypercall library, now that the XenInfo HOB is\r | |
225 | // available\r | |
226 | //\r | |
227 | Status = XenHypercallLibInit ();\r | |
228 | ASSERT_RETURN_ERROR (Status);\r | |
229 | \r | |
3b96221f AP |
230 | return EFI_SUCCESS;\r |
231 | }\r | |
232 | \r | |
233 | /**\r | |
234 | Figures out if we are running inside Xen HVM.\r | |
235 | \r | |
236 | @retval TRUE Xen was detected\r | |
237 | @retval FALSE Xen was not detected\r | |
238 | \r | |
239 | **/\r | |
240 | BOOLEAN\r | |
241 | XenDetect (\r | |
242 | VOID\r | |
243 | )\r | |
244 | {\r | |
ac0a286f | 245 | UINT8 Signature[13];\r |
3b96221f AP |
246 | \r |
247 | if (mXenLeaf != 0) {\r | |
248 | return TRUE;\r | |
249 | }\r | |
250 | \r | |
251 | Signature[12] = '\0';\r | |
252 | for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {\r | |
ac0a286f MK |
253 | AsmCpuid (\r |
254 | mXenLeaf,\r | |
255 | NULL,\r | |
256 | (UINT32 *)&Signature[0],\r | |
257 | (UINT32 *)&Signature[4],\r | |
258 | (UINT32 *)&Signature[8]\r | |
259 | );\r | |
260 | \r | |
261 | if (!AsciiStrCmp ((CHAR8 *)Signature, "XenVMMXenVMM")) {\r | |
3b96221f AP |
262 | return TRUE;\r |
263 | }\r | |
264 | }\r | |
265 | \r | |
266 | mXenLeaf = 0;\r | |
267 | return FALSE;\r | |
268 | }\r | |
269 | \r | |
4022f7fa AP |
270 | BOOLEAN\r |
271 | XenHvmloaderDetected (\r | |
272 | VOID\r | |
273 | )\r | |
274 | {\r | |
275 | return (mXenHvmloaderInfo != NULL);\r | |
276 | }\r | |
3b96221f | 277 | \r |
64eac295 AP |
278 | BOOLEAN\r |
279 | XenPvhDetected (\r | |
280 | VOID\r | |
281 | )\r | |
282 | {\r | |
283 | //\r | |
284 | // This function should only be used after XenConnect\r | |
285 | //\r | |
286 | ASSERT (mXenInfo.HyperPages != NULL);\r | |
287 | \r | |
288 | return mXenHvmloaderInfo == NULL;\r | |
289 | }\r | |
290 | \r | |
3b96221f AP |
291 | VOID\r |
292 | XenPublishRamRegions (\r | |
293 | VOID\r | |
294 | )\r | |
295 | {\r | |
ac0a286f MK |
296 | EFI_E820_ENTRY64 *E820Map;\r |
297 | UINT32 E820EntriesCount;\r | |
298 | EFI_STATUS Status;\r | |
299 | EFI_E820_ENTRY64 *Entry;\r | |
300 | UINTN Index;\r | |
301 | UINT64 LapicBase;\r | |
302 | UINT64 LapicEnd;\r | |
3b96221f AP |
303 | \r |
304 | DEBUG ((DEBUG_INFO, "Using memory map provided by Xen\n"));\r | |
305 | \r | |
306 | //\r | |
307 | // Parse RAM in E820 map\r | |
308 | //\r | |
309 | E820EntriesCount = 0;\r | |
ac0a286f | 310 | Status = XenGetE820Map (&E820Map, &E820EntriesCount);\r |
3b96221f AP |
311 | ASSERT_EFI_ERROR (Status);\r |
312 | \r | |
77d35f50 AP |
313 | AddMemoryBaseSizeHob (0, 0xA0000);\r |
314 | //\r | |
315 | // Video memory + Legacy BIOS region, to allow Linux to boot.\r | |
316 | //\r | |
317 | AddReservedMemoryBaseSizeHob (0xA0000, BASE_1MB - 0xA0000, TRUE);\r | |
318 | \r | |
24465c38 | 319 | LapicBase = PcdGet32 (PcdCpuLocalApicBaseAddress);\r |
ac0a286f | 320 | LapicEnd = LapicBase + SIZE_1MB;\r |
24465c38 AP |
321 | AddIoMemoryRangeHob (LapicBase, LapicEnd);\r |
322 | \r | |
323 | for (Index = 0; Index < E820EntriesCount; Index++) {\r | |
ac0a286f MK |
324 | UINT64 Base;\r |
325 | UINT64 End;\r | |
326 | UINT64 ReservedBase;\r | |
327 | UINT64 ReservedEnd;\r | |
24465c38 AP |
328 | \r |
329 | Entry = &E820Map[Index];\r | |
330 | \r | |
331 | //\r | |
332 | // Round up the start address, and round down the end address.\r | |
333 | //\r | |
334 | Base = ALIGN_VALUE (Entry->BaseAddr, (UINT64)EFI_PAGE_SIZE);\r | |
ac0a286f | 335 | End = (Entry->BaseAddr + Entry->Length) & ~(UINT64)EFI_PAGE_MASK;\r |
24465c38 | 336 | \r |
77d35f50 AP |
337 | //\r |
338 | // Ignore the first 1MB, this is handled before the loop.\r | |
339 | //\r | |
340 | if (Base < BASE_1MB) {\r | |
341 | Base = BASE_1MB;\r | |
342 | }\r | |
ac0a286f | 343 | \r |
77d35f50 AP |
344 | if (Base >= End) {\r |
345 | continue;\r | |
346 | }\r | |
347 | \r | |
24465c38 | 348 | switch (Entry->Type) {\r |
ac0a286f MK |
349 | case EfiAcpiAddressRangeMemory:\r |
350 | AddMemoryRangeHob (Base, End);\r | |
351 | break;\r | |
352 | case EfiAcpiAddressRangeACPI:\r | |
353 | AddReservedMemoryRangeHob (Base, End, FALSE);\r | |
354 | break;\r | |
355 | case EfiAcpiAddressRangeReserved:\r | |
356 | //\r | |
357 | // hvmloader marks a range that overlaps with the local APIC memory\r | |
358 | // mapped region as reserved, but CpuDxe wants it as mapped IO. We\r | |
359 | // have already added it as mapped IO, so skip it here.\r | |
360 | //\r | |
361 | \r | |
362 | //\r | |
363 | // add LAPIC predecessor range, if any\r | |
364 | //\r | |
365 | ReservedBase = Base;\r | |
366 | ReservedEnd = MIN (End, LapicBase);\r | |
367 | if (ReservedBase < ReservedEnd) {\r | |
368 | AddReservedMemoryRangeHob (ReservedBase, ReservedEnd, FALSE);\r | |
369 | }\r | |
370 | \r | |
371 | //\r | |
372 | // add LAPIC successor range, if any\r | |
373 | //\r | |
374 | ReservedBase = MAX (Base, LapicEnd);\r | |
375 | ReservedEnd = End;\r | |
376 | if (ReservedBase < ReservedEnd) {\r | |
377 | AddReservedMemoryRangeHob (ReservedBase, ReservedEnd, FALSE);\r | |
378 | }\r | |
379 | \r | |
380 | break;\r | |
381 | default:\r | |
382 | break;\r | |
3b96221f AP |
383 | }\r |
384 | }\r | |
385 | }\r | |
386 | \r | |
51e0bd28 AP |
387 | EFI_STATUS\r |
388 | PhysicalAddressIdentityMapping (\r | |
ac0a286f | 389 | IN EFI_PHYSICAL_ADDRESS AddressToMap\r |
51e0bd28 AP |
390 | )\r |
391 | {\r | |
392 | INTN Index;\r | |
393 | PAGE_MAP_AND_DIRECTORY_POINTER *L4, *L3;\r | |
394 | PAGE_TABLE_ENTRY *PageTable;\r | |
395 | \r | |
396 | DEBUG ((DEBUG_INFO, "Mapping 1:1 of address 0x%lx\n", (UINT64)AddressToMap));\r | |
397 | \r | |
398 | // L4 / Top level Page Directory Pointers\r | |
399 | \r | |
ac0a286f | 400 | L4 = (VOID *)(UINTN)PcdGet32 (PcdOvmfSecPageTablesBase);\r |
51e0bd28 AP |
401 | Index = PML4_OFFSET (AddressToMap);\r |
402 | \r | |
403 | if (!L4[Index].Bits.Present) {\r | |
404 | L3 = AllocatePages (1);\r | |
405 | if (L3 == NULL) {\r | |
406 | return EFI_OUT_OF_RESOURCES;\r | |
407 | }\r | |
408 | \r | |
409 | ZeroMem (L3, EFI_PAGE_SIZE);\r | |
410 | \r | |
ac0a286f MK |
411 | L4[Index].Bits.ReadWrite = 1;\r |
412 | L4[Index].Bits.Accessed = 1;\r | |
51e0bd28 | 413 | L4[Index].Bits.PageTableBaseAddress = (EFI_PHYSICAL_ADDRESS)L3 >> 12;\r |
ac0a286f | 414 | L4[Index].Bits.Present = 1;\r |
51e0bd28 AP |
415 | }\r |
416 | \r | |
417 | // L3 / Next level Page Directory Pointers\r | |
418 | \r | |
ac0a286f | 419 | L3 = (VOID *)(EFI_PHYSICAL_ADDRESS)(L4[Index].Bits.PageTableBaseAddress << 12);\r |
51e0bd28 AP |
420 | Index = PDP_OFFSET (AddressToMap);\r |
421 | \r | |
422 | if (!L3[Index].Bits.Present) {\r | |
423 | PageTable = AllocatePages (1);\r | |
424 | if (PageTable == NULL) {\r | |
425 | return EFI_OUT_OF_RESOURCES;\r | |
426 | }\r | |
427 | \r | |
428 | ZeroMem (PageTable, EFI_PAGE_SIZE);\r | |
429 | \r | |
ac0a286f MK |
430 | L3[Index].Bits.ReadWrite = 1;\r |
431 | L3[Index].Bits.Accessed = 1;\r | |
51e0bd28 | 432 | L3[Index].Bits.PageTableBaseAddress = (EFI_PHYSICAL_ADDRESS)PageTable >> 12;\r |
ac0a286f | 433 | L3[Index].Bits.Present = 1;\r |
51e0bd28 AP |
434 | }\r |
435 | \r | |
436 | // L2 / Page Table Entries\r | |
437 | \r | |
ac0a286f MK |
438 | PageTable = (VOID *)(EFI_PHYSICAL_ADDRESS)(L3[Index].Bits.PageTableBaseAddress << 12);\r |
439 | Index = PDE_OFFSET (AddressToMap);\r | |
51e0bd28 AP |
440 | \r |
441 | if (!PageTable[Index].Bits.Present) {\r | |
ac0a286f MK |
442 | PageTable[Index].Bits.ReadWrite = 1;\r |
443 | PageTable[Index].Bits.Accessed = 1;\r | |
444 | PageTable[Index].Bits.Dirty = 1;\r | |
445 | PageTable[Index].Bits.MustBe1 = 1;\r | |
51e0bd28 | 446 | PageTable[Index].Bits.PageTableBaseAddress = AddressToMap >> 21;\r |
ac0a286f | 447 | PageTable[Index].Bits.Present = 1;\r |
51e0bd28 AP |
448 | }\r |
449 | \r | |
450 | CpuFlushTlb ();\r | |
451 | \r | |
452 | return EFI_SUCCESS;\r | |
453 | }\r | |
c75c6405 AP |
454 | \r |
455 | STATIC\r | |
456 | EFI_STATUS\r | |
457 | MapSharedInfoPage (\r | |
ac0a286f | 458 | IN VOID *PagePtr\r |
c75c6405 AP |
459 | )\r |
460 | {\r | |
461 | xen_add_to_physmap_t Parameters;\r | |
462 | INTN ReturnCode;\r | |
463 | \r | |
464 | Parameters.domid = DOMID_SELF;\r | |
465 | Parameters.space = XENMAPSPACE_shared_info;\r | |
ac0a286f MK |
466 | Parameters.idx = 0;\r |
467 | Parameters.gpfn = (UINTN)PagePtr >> EFI_PAGE_SHIFT;\r | |
468 | ReturnCode = XenHypercallMemoryOp (XENMEM_add_to_physmap, &Parameters);\r | |
c75c6405 AP |
469 | if (ReturnCode != 0) {\r |
470 | return EFI_NO_MAPPING;\r | |
471 | }\r | |
ac0a286f | 472 | \r |
c75c6405 AP |
473 | return EFI_SUCCESS;\r |
474 | }\r | |
475 | \r | |
476 | STATIC\r | |
477 | VOID\r | |
478 | UnmapXenPage (\r | |
ac0a286f | 479 | IN VOID *PagePtr\r |
c75c6405 AP |
480 | )\r |
481 | {\r | |
ac0a286f MK |
482 | xen_remove_from_physmap_t Parameters;\r |
483 | INTN ReturnCode;\r | |
c75c6405 AP |
484 | \r |
485 | Parameters.domid = DOMID_SELF;\r | |
ac0a286f MK |
486 | Parameters.gpfn = (UINTN)PagePtr >> EFI_PAGE_SHIFT;\r |
487 | ReturnCode = XenHypercallMemoryOp (XENMEM_remove_from_physmap, &Parameters);\r | |
c75c6405 AP |
488 | ASSERT (ReturnCode == 0);\r |
489 | }\r | |
490 | \r | |
c75c6405 AP |
491 | STATIC\r |
492 | UINT64\r | |
493 | GetCpuFreq (\r | |
ac0a286f | 494 | IN XEN_VCPU_TIME_INFO *VcpuTime\r |
c75c6405 AP |
495 | )\r |
496 | {\r | |
ac0a286f MK |
497 | UINT32 Version;\r |
498 | UINT32 TscToSystemMultiplier;\r | |
499 | INT8 TscShift;\r | |
500 | UINT64 CpuFreq;\r | |
c75c6405 AP |
501 | \r |
502 | do {\r | |
503 | Version = VcpuTime->Version;\r | |
504 | MemoryFence ();\r | |
505 | TscToSystemMultiplier = VcpuTime->TscToSystemMultiplier;\r | |
ac0a286f | 506 | TscShift = VcpuTime->TscShift;\r |
c75c6405 AP |
507 | MemoryFence ();\r |
508 | } while (((Version & 1) != 0) && (Version != VcpuTime->Version));\r | |
509 | \r | |
510 | CpuFreq = DivU64x32 (LShiftU64 (1000000000ULL, 32), TscToSystemMultiplier);\r | |
511 | if (TscShift >= 0) {\r | |
ac0a286f | 512 | CpuFreq = RShiftU64 (CpuFreq, TscShift);\r |
c75c6405 | 513 | } else {\r |
ac0a286f | 514 | CpuFreq = LShiftU64 (CpuFreq, -TscShift);\r |
c75c6405 | 515 | }\r |
ac0a286f | 516 | \r |
c75c6405 AP |
517 | return CpuFreq;\r |
518 | }\r | |
519 | \r | |
520 | STATIC\r | |
521 | VOID\r | |
522 | XenDelay (\r | |
ac0a286f MK |
523 | IN XEN_VCPU_TIME_INFO *VcpuTimeInfo,\r |
524 | IN UINT64 DelayNs\r | |
c75c6405 AP |
525 | )\r |
526 | {\r | |
ac0a286f MK |
527 | UINT64 Tick;\r |
528 | UINT64 CpuFreq;\r | |
529 | UINT64 Delay;\r | |
530 | UINT64 DelayTick;\r | |
531 | UINT64 NewTick;\r | |
532 | RETURN_STATUS Status;\r | |
c75c6405 AP |
533 | \r |
534 | Tick = AsmReadTsc ();\r | |
535 | \r | |
536 | CpuFreq = GetCpuFreq (VcpuTimeInfo);\r | |
ac0a286f | 537 | Status = SafeUint64Mult (DelayNs, CpuFreq, &Delay);\r |
c75c6405 | 538 | if (EFI_ERROR (Status)) {\r |
ac0a286f MK |
539 | DEBUG ((\r |
540 | DEBUG_ERROR,\r | |
c75c6405 | 541 | "XenDelay (%lu ns): delay too big in relation to CPU freq %lu Hz\n",\r |
ac0a286f MK |
542 | DelayNs,\r |
543 | CpuFreq\r | |
544 | ));\r | |
c75c6405 AP |
545 | ASSERT_EFI_ERROR (Status);\r |
546 | CpuDeadLoop ();\r | |
547 | }\r | |
548 | \r | |
549 | DelayTick = DivU64x32 (Delay, 1000000000);\r | |
550 | \r | |
551 | NewTick = Tick + DelayTick;\r | |
552 | \r | |
553 | //\r | |
554 | // Check for overflow\r | |
555 | //\r | |
556 | if (NewTick < Tick) {\r | |
557 | //\r | |
558 | // Overflow, wait for TSC to also overflow\r | |
559 | //\r | |
560 | while (AsmReadTsc () >= Tick) {\r | |
561 | CpuPause ();\r | |
562 | }\r | |
563 | }\r | |
564 | \r | |
565 | while (AsmReadTsc () <= NewTick) {\r | |
566 | CpuPause ();\r | |
567 | }\r | |
568 | }\r | |
569 | \r | |
c75c6405 AP |
570 | /**\r |
571 | Calculate the frequency of the Local Apic Timer\r | |
572 | **/\r | |
573 | VOID\r | |
574 | CalibrateLapicTimer (\r | |
575 | VOID\r | |
576 | )\r | |
577 | {\r | |
ac0a286f MK |
578 | XEN_SHARED_INFO *SharedInfo;\r |
579 | XEN_VCPU_TIME_INFO *VcpuTimeInfo;\r | |
580 | UINT32 TimerTick, TimerTick2, DiffTimer;\r | |
581 | UINT64 TscTick, TscTick2;\r | |
582 | UINT64 Freq;\r | |
583 | UINT64 Dividend;\r | |
584 | EFI_STATUS Status;\r | |
585 | \r | |
586 | SharedInfo = (VOID *)((UINTN)PcdGet32 (PcdCpuLocalApicBaseAddress) + SIZE_1MB);\r | |
587 | Status = PhysicalAddressIdentityMapping ((EFI_PHYSICAL_ADDRESS)SharedInfo);\r | |
c75c6405 | 588 | if (EFI_ERROR (Status)) {\r |
ac0a286f MK |
589 | DEBUG ((\r |
590 | DEBUG_ERROR,\r | |
c75c6405 | 591 | "Failed to add page table entry for Xen shared info page: %r\n",\r |
ac0a286f MK |
592 | Status\r |
593 | ));\r | |
c75c6405 AP |
594 | ASSERT_EFI_ERROR (Status);\r |
595 | return;\r | |
596 | }\r | |
597 | \r | |
598 | Status = MapSharedInfoPage (SharedInfo);\r | |
599 | if (EFI_ERROR (Status)) {\r | |
ac0a286f MK |
600 | DEBUG ((\r |
601 | DEBUG_ERROR,\r | |
602 | "Failed to map Xen's shared info page: %r\n",\r | |
603 | Status\r | |
604 | ));\r | |
c75c6405 AP |
605 | ASSERT_EFI_ERROR (Status);\r |
606 | return;\r | |
607 | }\r | |
608 | \r | |
609 | VcpuTimeInfo = &SharedInfo->VcpuInfo[0].Time;\r | |
610 | \r | |
611 | InitializeApicTimer (1, MAX_UINT32, TRUE, 0);\r | |
612 | DisableApicTimerInterrupt ();\r | |
613 | \r | |
614 | TimerTick = GetApicTimerCurrentCount ();\r | |
ac0a286f | 615 | TscTick = AsmReadTsc ();\r |
c75c6405 AP |
616 | XenDelay (VcpuTimeInfo, 1000000ULL);\r |
617 | TimerTick2 = GetApicTimerCurrentCount ();\r | |
ac0a286f | 618 | TscTick2 = AsmReadTsc ();\r |
c75c6405 AP |
619 | \r |
620 | DiffTimer = TimerTick - TimerTick2;\r | |
ac0a286f | 621 | Status = SafeUint64Mult (GetCpuFreq (VcpuTimeInfo), DiffTimer, &Dividend);\r |
c75c6405 AP |
622 | if (EFI_ERROR (Status)) {\r |
623 | DEBUG ((DEBUG_ERROR, "overflow while calculating APIC frequency\n"));\r | |
ac0a286f MK |
624 | DEBUG ((\r |
625 | DEBUG_ERROR,\r | |
626 | "CPU freq: %lu Hz; APIC timer tick count for 1 ms: %u\n",\r | |
627 | GetCpuFreq (VcpuTimeInfo),\r | |
628 | DiffTimer\r | |
629 | ));\r | |
c75c6405 AP |
630 | ASSERT_EFI_ERROR (Status);\r |
631 | CpuDeadLoop ();\r | |
632 | }\r | |
633 | \r | |
634 | Freq = DivU64x64Remainder (Dividend, TscTick2 - TscTick, NULL);\r | |
635 | DEBUG ((DEBUG_INFO, "APIC Freq % 8lu Hz\n", Freq));\r | |
636 | \r | |
71cdb91f AP |
637 | ASSERT (Freq <= MAX_UINT32);\r |
638 | Status = PcdSet32S (PcdFSBClock, (UINT32)Freq);\r | |
639 | ASSERT_EFI_ERROR (Status);\r | |
640 | \r | |
c75c6405 AP |
641 | UnmapXenPage (SharedInfo);\r |
642 | }\r |