projects / mirror_edk2.git / blame
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| e42e9404 | 1 | /** @file\r |
| 2 | SMM IPL that produces SMM related runtime protocols and load the SMM Core into SMRAM\r | |
| 3 | \r | |
| 4b5d69d3 | 4 | Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>\r |
| e42e9404 | 5 | This program and the accompanying materials are licensed and made available \r |
| 6 | under the terms and conditions of the BSD License which accompanies this \r | |
| 7 | 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 | **/\r | |
| 14 | \r | |
| 15 | #include <PiDxe.h>\r | |
| 16 | \r | |
| 17 | #include <Protocol/SmmBase2.h>\r | |
| 18 | #include <Protocol/SmmCommunication.h>\r | |
| 19 | #include <Protocol/SmmAccess2.h>\r | |
| 20 | #include <Protocol/SmmConfiguration.h>\r | |
| 21 | #include <Protocol/SmmControl2.h>\r | |
| 22 | #include <Protocol/DxeSmmReadyToLock.h>\r | |
| 07d9dc83 | 23 | #include <Protocol/Cpu.h>\r |
| e42e9404 | 24 | \r |
| 25 | #include <Guid/EventGroup.h>\r | |
| 26 | #include <Guid/EventLegacyBios.h>\r | |
| 3c447c27 | 27 | #include <Guid/LoadModuleAtFixedAddress.h>\r |
| e42e9404 | 28 | \r |
| 29 | #include <Library/BaseLib.h>\r | |
| 30 | #include <Library/BaseMemoryLib.h>\r | |
| 31 | #include <Library/PeCoffLib.h>\r | |
| 32 | #include <Library/CacheMaintenanceLib.h>\r | |
| 33 | #include <Library/MemoryAllocationLib.h>\r | |
| 34 | #include <Library/DebugLib.h>\r | |
| 35 | #include <Library/UefiBootServicesTableLib.h>\r | |
| 36 | #include <Library/DxeServicesTableLib.h>\r | |
| d7aaf1dc | 37 | #include <Library/DxeServicesLib.h>\r |
| e42e9404 | 38 | #include <Library/UefiLib.h>\r |
| 39 | #include <Library/UefiRuntimeLib.h>\r | |
| 3c447c27 | 40 | #include <Library/PcdLib.h>\r |
| 265fff39 | 41 | #include <Library/ReportStatusCodeLib.h>\r |
| e42e9404 | 42 | \r |
| 43 | #include "PiSmmCorePrivateData.h"\r | |
| 44 | \r | |
| 45 | //\r | |
| 46 | // Function prototypes from produced protocols\r | |
| 47 | //\r | |
| 48 | \r | |
| 49 | /**\r | |
| 50 | Indicate whether the driver is currently executing in the SMM Initialization phase.\r | |
| 51 | \r | |
| 52 | @param This The EFI_SMM_BASE2_PROTOCOL instance.\r | |
| 53 | @param InSmram Pointer to a Boolean which, on return, indicates that the driver is currently executing\r | |
| 54 | inside of SMRAM (TRUE) or outside of SMRAM (FALSE).\r | |
| 55 | \r | |
| 56 | @retval EFI_INVALID_PARAMETER InSmram was NULL.\r | |
| 57 | @retval EFI_SUCCESS The call returned successfully.\r | |
| 58 | \r | |
| 59 | **/\r | |
| 60 | EFI_STATUS\r | |
| 61 | EFIAPI\r | |
| 62 | SmmBase2InSmram (\r | |
| 63 | IN CONST EFI_SMM_BASE2_PROTOCOL *This,\r | |
| 64 | OUT BOOLEAN *InSmram\r | |
| 65 | );\r | |
| 66 | \r | |
| 67 | /**\r | |
| 68 | Retrieves the location of the System Management System Table (SMST).\r | |
| 69 | \r | |
| 70 | @param This The EFI_SMM_BASE2_PROTOCOL instance.\r | |
| 71 | @param Smst On return, points to a pointer to the System Management Service Table (SMST).\r | |
| 72 | \r | |
| 73 | @retval EFI_INVALID_PARAMETER Smst or This was invalid.\r | |
| 74 | @retval EFI_SUCCESS The memory was returned to the system.\r | |
| 75 | @retval EFI_UNSUPPORTED Not in SMM.\r | |
| 76 | \r | |
| 77 | **/\r | |
| 78 | EFI_STATUS\r | |
| 79 | EFIAPI\r | |
| 80 | SmmBase2GetSmstLocation (\r | |
| 81 | IN CONST EFI_SMM_BASE2_PROTOCOL *This,\r | |
| 82 | OUT EFI_SMM_SYSTEM_TABLE2 **Smst\r | |
| 83 | );\r | |
| 84 | \r | |
| 85 | /**\r | |
| 86 | Communicates with a registered handler.\r | |
| 87 | \r | |
| 88 | This function provides a service to send and receive messages from a registered \r | |
| 89 | UEFI service. This function is part of the SMM Communication Protocol that may \r | |
| 90 | be called in physical mode prior to SetVirtualAddressMap() and in virtual mode \r | |
| 91 | after SetVirtualAddressMap().\r | |
| 92 | \r | |
| 93 | @param[in] This The EFI_SMM_COMMUNICATION_PROTOCOL instance.\r | |
| 2292758d | 94 | @param[in, out] CommBuffer A pointer to the buffer to convey into SMRAM.\r |
| 95 | @param[in, out] CommSize The size of the data buffer being passed in.On exit, the size of data\r | |
| e42e9404 | 96 | being returned. Zero if the handler does not wish to reply with any data.\r |
| 97 | \r | |
| 98 | @retval EFI_SUCCESS The message was successfully posted.\r | |
| 99 | @retval EFI_INVALID_PARAMETER The CommBuffer was NULL.\r | |
| 100 | **/\r | |
| 101 | EFI_STATUS\r | |
| 102 | EFIAPI\r | |
| 103 | SmmCommunicationCommunicate (\r | |
| 104 | IN CONST EFI_SMM_COMMUNICATION_PROTOCOL *This,\r | |
| 105 | IN OUT VOID *CommBuffer,\r | |
| 106 | IN OUT UINTN *CommSize\r | |
| 107 | );\r | |
| 108 | \r | |
| 109 | /**\r | |
| 110 | Event notification that is fired every time a gEfiSmmConfigurationProtocol installs.\r | |
| 111 | \r | |
| 112 | @param Event The Event that is being processed, not used.\r | |
| 113 | @param Context Event Context, not used.\r | |
| 114 | \r | |
| 115 | **/\r | |
| 116 | VOID\r | |
| 117 | EFIAPI\r | |
| 118 | SmmIplSmmConfigurationEventNotify (\r | |
| 119 | IN EFI_EVENT Event,\r | |
| 120 | IN VOID *Context\r | |
| 121 | );\r | |
| 122 | \r | |
| 123 | /**\r | |
| 124 | Event notification that is fired every time a DxeSmmReadyToLock protocol is added\r | |
| 125 | or if gEfiEventReadyToBootGuid is signalled.\r | |
| 126 | \r | |
| 127 | @param Event The Event that is being processed, not used.\r | |
| 128 | @param Context Event Context, not used.\r | |
| 129 | \r | |
| 130 | **/\r | |
| 131 | VOID\r | |
| 132 | EFIAPI\r | |
| 133 | SmmIplReadyToLockEventNotify (\r | |
| 134 | IN EFI_EVENT Event,\r | |
| 135 | IN VOID *Context\r | |
| 136 | );\r | |
| 137 | \r | |
| 138 | /**\r | |
| 139 | Event notification that is fired when DxeDispatch Event Group is signaled.\r | |
| 140 | \r | |
| 141 | @param Event The Event that is being processed, not used.\r | |
| 142 | @param Context Event Context, not used.\r | |
| 143 | \r | |
| 5657b268 | 144 | **/\r |
| 145 | VOID\r | |
| 146 | EFIAPI\r | |
| 147 | SmmIplDxeDispatchEventNotify (\r | |
| 148 | IN EFI_EVENT Event,\r | |
| 149 | IN VOID *Context\r | |
| 150 | );\r | |
| 151 | \r | |
| 152 | /**\r | |
| 153 | Event notification that is fired when a GUIDed Event Group is signaled.\r | |
| 154 | \r | |
| 155 | @param Event The Event that is being processed, not used.\r | |
| 156 | @param Context Event Context, not used.\r | |
| 157 | \r | |
| e42e9404 | 158 | **/\r |
| 159 | VOID\r | |
| 160 | EFIAPI\r | |
| 161 | SmmIplGuidedEventNotify (\r | |
| 162 | IN EFI_EVENT Event,\r | |
| 163 | IN VOID *Context\r | |
| 164 | );\r | |
| 165 | \r | |
| 265fff39 JF |
166 | /**\r |
| 167 | Event notification that is fired when EndOfDxe Event Group is signaled.\r | |
| 168 | \r | |
| 169 | @param Event The Event that is being processed, not used.\r | |
| 170 | @param Context Event Context, not used.\r | |
| 171 | \r | |
| 172 | **/\r | |
| 173 | VOID\r | |
| 174 | EFIAPI\r | |
| 175 | SmmIplEndOfDxeEventNotify (\r | |
| 176 | IN EFI_EVENT Event,\r | |
| 177 | IN VOID *Context\r | |
| 178 | );\r | |
| 179 | \r | |
| e42e9404 | 180 | /**\r |
| 181 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
| 182 | \r | |
| 183 | This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r | |
| 184 | It convers pointer to new virtual address.\r | |
| 185 | \r | |
| 186 | @param Event Event whose notification function is being invoked.\r | |
| 187 | @param Context Pointer to the notification function's context.\r | |
| 188 | \r | |
| 189 | **/\r | |
| 190 | VOID\r | |
| 191 | EFIAPI\r | |
| 192 | SmmIplSetVirtualAddressNotify (\r | |
| 193 | IN EFI_EVENT Event,\r | |
| 194 | IN VOID *Context\r | |
| 195 | );\r | |
| 196 | \r | |
| 197 | //\r | |
| 198 | // Data structure used to declare a table of protocol notifications and event \r | |
| 199 | // notifications required by the SMM IPL\r | |
| 200 | //\r | |
| 201 | typedef struct {\r | |
| 202 | BOOLEAN Protocol;\r | |
| 203 | BOOLEAN CloseOnLock;\r | |
| 204 | EFI_GUID *Guid;\r | |
| 205 | EFI_EVENT_NOTIFY NotifyFunction;\r | |
| 206 | VOID *NotifyContext;\r | |
| 5657b268 | 207 | EFI_TPL NotifyTpl;\r |
| e42e9404 | 208 | EFI_EVENT Event;\r |
| 209 | } SMM_IPL_EVENT_NOTIFICATION;\r | |
| 210 | \r | |
| 211 | //\r | |
| 212 | // Handle to install the SMM Base2 Protocol and the SMM Communication Protocol\r | |
| 213 | //\r | |
| 214 | EFI_HANDLE mSmmIplHandle = NULL;\r | |
| 215 | \r | |
| 216 | //\r | |
| 217 | // SMM Base 2 Protocol instance\r | |
| 218 | //\r | |
| 219 | EFI_SMM_BASE2_PROTOCOL mSmmBase2 = {\r | |
| 220 | SmmBase2InSmram,\r | |
| 221 | SmmBase2GetSmstLocation\r | |
| 222 | };\r | |
| 223 | \r | |
| 224 | //\r | |
| 225 | // SMM Communication Protocol instance\r | |
| 226 | //\r | |
| 227 | EFI_SMM_COMMUNICATION_PROTOCOL mSmmCommunication = {\r | |
| 228 | SmmCommunicationCommunicate\r | |
| 229 | };\r | |
| 230 | \r | |
| 231 | //\r | |
| 232 | // SMM Core Private Data structure that contains the data shared between\r | |
| 233 | // the SMM IPL and the SMM Core.\r | |
| 234 | //\r | |
| 235 | SMM_CORE_PRIVATE_DATA mSmmCorePrivateData = {\r | |
| 236 | SMM_CORE_PRIVATE_DATA_SIGNATURE, // Signature\r | |
| 237 | NULL, // SmmIplImageHandle\r | |
| 238 | 0, // SmramRangeCount\r | |
| 239 | NULL, // SmramRanges\r | |
| 240 | NULL, // SmmEntryPoint\r | |
| 241 | FALSE, // SmmEntryPointRegistered\r | |
| 242 | FALSE, // InSmm\r | |
| 243 | NULL, // Smst\r | |
| e42e9404 | 244 | NULL, // CommunicationBuffer\r |
| ab780ebf | 245 | 0, // BufferSize\r |
| e42e9404 | 246 | EFI_SUCCESS // ReturnStatus\r |
| 247 | };\r | |
| 248 | \r | |
| 249 | //\r | |
| 250 | // Global pointer used to access mSmmCorePrivateData from outside and inside SMM\r | |
| 251 | //\r | |
| 252 | SMM_CORE_PRIVATE_DATA *gSmmCorePrivate = &mSmmCorePrivateData;\r | |
| 253 | \r | |
| 254 | //\r | |
| 255 | // SMM IPL global variables\r | |
| 256 | //\r | |
| 257 | EFI_SMM_CONTROL2_PROTOCOL *mSmmControl2;\r | |
| 258 | EFI_SMM_ACCESS2_PROTOCOL *mSmmAccess;\r | |
| 259 | EFI_SMRAM_DESCRIPTOR *mCurrentSmramRange;\r | |
| 260 | BOOLEAN mSmmLocked = FALSE;\r | |
| 265fff39 | 261 | BOOLEAN mEndOfDxe = FALSE;\r |
| 40e8cca5 | 262 | EFI_PHYSICAL_ADDRESS mSmramCacheBase;\r |
| 263 | UINT64 mSmramCacheSize;\r | |
| e42e9404 | 264 | \r |
| 670a563f | 265 | EFI_SMM_COMMUNICATE_HEADER mCommunicateHeader;\r |
| c2aeb66f | 266 | EFI_LOAD_FIXED_ADDRESS_CONFIGURATION_TABLE *mLMFAConfigurationTable = NULL;\r |
| 670a563f | 267 | \r |
| e42e9404 | 268 | //\r |
| 269 | // Table of Protocol notification and GUIDed Event notifications that the SMM IPL requires\r | |
| 270 | //\r | |
| 271 | SMM_IPL_EVENT_NOTIFICATION mSmmIplEvents[] = {\r | |
| 272 | //\r | |
| 2048c585 | 273 | // Declare protocol notification on the SMM Configuration protocol. When this notification is established,\r |
| e42e9404 | 274 | // the associated event is immediately signalled, so the notification function will be executed and the \r |
| 275 | // SMM Configuration Protocol will be found if it is already in the handle database.\r | |
| 276 | //\r | |
| 5657b268 | 277 | { TRUE, FALSE, &gEfiSmmConfigurationProtocolGuid, SmmIplSmmConfigurationEventNotify, &gEfiSmmConfigurationProtocolGuid, TPL_NOTIFY, NULL },\r |
| e42e9404 | 278 | //\r |
| 01331951 | 279 | // Declare protocol notification on DxeSmmReadyToLock protocols. When this notification is established, \r |
| e42e9404 | 280 | // the associated event is immediately signalled, so the notification function will be executed and the \r |
| 281 | // DXE SMM Ready To Lock Protocol will be found if it is already in the handle database.\r | |
| 282 | //\r | |
| 5657b268 | 283 | { TRUE, TRUE, &gEfiDxeSmmReadyToLockProtocolGuid, SmmIplReadyToLockEventNotify, &gEfiDxeSmmReadyToLockProtocolGuid, TPL_CALLBACK, NULL },\r |
| e42e9404 | 284 | //\r |
| 2048c585 | 285 | // Declare event notification on EndOfDxe event. When this notification is established,\r |
| 46ece1ff JY |
286 | // the associated event is immediately signalled, so the notification function will be executed and the \r |
| 287 | // SMM End Of Dxe Protocol will be found if it is already in the handle database.\r | |
| 288 | //\r | |
| dc157845 | 289 | { FALSE, TRUE, &gEfiEndOfDxeEventGroupGuid, SmmIplGuidedEventNotify, &gEfiEndOfDxeEventGroupGuid, TPL_CALLBACK, NULL },\r |
| 46ece1ff | 290 | //\r |
| 265fff39 JF |
291 | // Declare event notification on EndOfDxe event. This is used to set EndOfDxe event signaled flag.\r |
| 292 | //\r | |
| 293 | { FALSE, TRUE, &gEfiEndOfDxeEventGroupGuid, SmmIplEndOfDxeEventNotify, &gEfiEndOfDxeEventGroupGuid, TPL_CALLBACK, NULL },\r | |
| 294 | //\r | |
| e42e9404 | 295 | // Declare event notification on the DXE Dispatch Event Group. This event is signaled by the DXE Core\r |
| 296 | // each time the DXE Core dispatcher has completed its work. When this event is signalled, the SMM Core\r | |
| 297 | // if notified, so the SMM Core can dispatch SMM drivers.\r | |
| 298 | //\r | |
| 5657b268 | 299 | { FALSE, TRUE, &gEfiEventDxeDispatchGuid, SmmIplDxeDispatchEventNotify, &gEfiEventDxeDispatchGuid, TPL_CALLBACK, NULL },\r |
| e42e9404 | 300 | //\r |
| 301 | // Declare event notification on Ready To Boot Event Group. This is an extra event notification that is\r | |
| 302 | // used to make sure SMRAM is locked before any boot options are processed.\r | |
| 303 | //\r | |
| 5657b268 | 304 | { FALSE, TRUE, &gEfiEventReadyToBootGuid, SmmIplReadyToLockEventNotify, &gEfiEventReadyToBootGuid, TPL_CALLBACK, NULL },\r |
| e42e9404 | 305 | //\r |
| 306 | // Declare event notification on Legacy Boot Event Group. This is used to inform the SMM Core that the platform \r | |
| 307 | // is performing a legacy boot operation, and that the UEFI environment is no longer available and the SMM Core \r | |
| 308 | // must guarantee that it does not access any UEFI related structures outside of SMRAM.\r | |
| 53ec4d7f | 309 | // It is also to inform the SMM Core to notify SMM driver that system enter legacy boot.\r |
| e42e9404 | 310 | //\r |
| 5657b268 | 311 | { FALSE, FALSE, &gEfiEventLegacyBootGuid, SmmIplGuidedEventNotify, &gEfiEventLegacyBootGuid, TPL_CALLBACK, NULL },\r |
| e42e9404 | 312 | //\r |
| 53ec4d7f SZ |
313 | // Declare event notification on Exit Boot Services Event Group. This is used to inform the SMM Core\r |
| 314 | // to notify SMM driver that system enter exit boot services.\r | |
| 315 | //\r | |
| 316 | { FALSE, FALSE, &gEfiEventExitBootServicesGuid, SmmIplGuidedEventNotify, &gEfiEventExitBootServicesGuid, TPL_CALLBACK, NULL },\r | |
| 317 | //\r | |
| 318 | // Declare event notification on Ready To Boot Event Group. This is used to inform the SMM Core\r | |
| 319 | // to notify SMM driver that system enter ready to boot.\r | |
| 320 | //\r | |
| 321 | { FALSE, FALSE, &gEfiEventReadyToBootGuid, SmmIplGuidedEventNotify, &gEfiEventReadyToBootGuid, TPL_CALLBACK, NULL },\r | |
| 322 | //\r | |
| e42e9404 | 323 | // Declare event notification on SetVirtualAddressMap() Event Group. This is used to convert gSmmCorePrivate \r |
| 324 | // and mSmmControl2 from physical addresses to virtual addresses.\r | |
| 325 | //\r | |
| 5657b268 | 326 | { FALSE, FALSE, &gEfiEventVirtualAddressChangeGuid, SmmIplSetVirtualAddressNotify, NULL, TPL_CALLBACK, NULL },\r |
| e42e9404 | 327 | //\r |
| 328 | // Terminate the table of event notifications\r | |
| 329 | //\r | |
| 5657b268 | 330 | { FALSE, FALSE, NULL, NULL, NULL, TPL_CALLBACK, NULL }\r |
| e42e9404 | 331 | };\r |
| 332 | \r | |
| 40e8cca5 | 333 | /**\r |
| 334 | Find the maximum SMRAM cache range that covers the range specified by SmramRange.\r | |
| 335 | \r | |
| 336 | This function searches and joins all adjacent ranges of SmramRange into a range to be cached.\r | |
| 337 | \r | |
| 338 | @param SmramRange The SMRAM range to search from.\r | |
| 339 | @param SmramCacheBase The returned cache range base.\r | |
| 340 | @param SmramCacheSize The returned cache range size.\r | |
| 341 | \r | |
| 342 | **/\r | |
| 343 | VOID\r | |
| 344 | GetSmramCacheRange (\r | |
| 345 | IN EFI_SMRAM_DESCRIPTOR *SmramRange,\r | |
| 346 | OUT EFI_PHYSICAL_ADDRESS *SmramCacheBase,\r | |
| 347 | OUT UINT64 *SmramCacheSize\r | |
| 348 | )\r | |
| 349 | {\r | |
| 350 | UINTN Index;\r | |
| 351 | EFI_PHYSICAL_ADDRESS RangeCpuStart;\r | |
| 352 | UINT64 RangePhysicalSize;\r | |
| 353 | BOOLEAN FoundAjacentRange;\r | |
| 354 | \r | |
| 355 | *SmramCacheBase = SmramRange->CpuStart;\r | |
| 356 | *SmramCacheSize = SmramRange->PhysicalSize;\r | |
| 357 | \r | |
| 358 | do {\r | |
| 359 | FoundAjacentRange = FALSE;\r | |
| 360 | for (Index = 0; Index < gSmmCorePrivate->SmramRangeCount; Index++) {\r | |
| 361 | RangeCpuStart = gSmmCorePrivate->SmramRanges[Index].CpuStart;\r | |
| 362 | RangePhysicalSize = gSmmCorePrivate->SmramRanges[Index].PhysicalSize;\r | |
| 363 | if (RangeCpuStart < *SmramCacheBase && *SmramCacheBase == (RangeCpuStart + RangePhysicalSize)) {\r | |
| 364 | *SmramCacheBase = RangeCpuStart;\r | |
| 365 | *SmramCacheSize += RangePhysicalSize;\r | |
| 366 | FoundAjacentRange = TRUE;\r | |
| 367 | } else if ((*SmramCacheBase + *SmramCacheSize) == RangeCpuStart && RangePhysicalSize > 0) {\r | |
| 368 | *SmramCacheSize += RangePhysicalSize;\r | |
| 369 | FoundAjacentRange = TRUE;\r | |
| 370 | }\r | |
| 371 | }\r | |
| 372 | } while (FoundAjacentRange);\r | |
| 373 | \r | |
| 374 | }\r | |
| 375 | \r | |
| e42e9404 | 376 | /**\r |
| 377 | Indicate whether the driver is currently executing in the SMM Initialization phase.\r | |
| 378 | \r | |
| 379 | @param This The EFI_SMM_BASE2_PROTOCOL instance.\r | |
| 380 | @param InSmram Pointer to a Boolean which, on return, indicates that the driver is currently executing\r | |
| 381 | inside of SMRAM (TRUE) or outside of SMRAM (FALSE).\r | |
| 382 | \r | |
| 383 | @retval EFI_INVALID_PARAMETER InSmram was NULL.\r | |
| 384 | @retval EFI_SUCCESS The call returned successfully.\r | |
| 385 | \r | |
| 386 | **/\r | |
| 387 | EFI_STATUS\r | |
| 388 | EFIAPI\r | |
| 389 | SmmBase2InSmram (\r | |
| 390 | IN CONST EFI_SMM_BASE2_PROTOCOL *This,\r | |
| 391 | OUT BOOLEAN *InSmram\r | |
| 392 | )\r | |
| 393 | {\r | |
| 394 | if (InSmram == NULL) {\r | |
| 395 | return EFI_INVALID_PARAMETER;\r | |
| 396 | }\r | |
| 397 | \r | |
| 398 | *InSmram = gSmmCorePrivate->InSmm;\r | |
| 399 | \r | |
| 400 | return EFI_SUCCESS;\r | |
| 401 | }\r | |
| 402 | \r | |
| 403 | /**\r | |
| 404 | Retrieves the location of the System Management System Table (SMST).\r | |
| 405 | \r | |
| 406 | @param This The EFI_SMM_BASE2_PROTOCOL instance.\r | |
| 407 | @param Smst On return, points to a pointer to the System Management Service Table (SMST).\r | |
| 408 | \r | |
| 409 | @retval EFI_INVALID_PARAMETER Smst or This was invalid.\r | |
| 410 | @retval EFI_SUCCESS The memory was returned to the system.\r | |
| 411 | @retval EFI_UNSUPPORTED Not in SMM.\r | |
| 412 | \r | |
| 413 | **/\r | |
| 414 | EFI_STATUS\r | |
| 415 | EFIAPI\r | |
| 416 | SmmBase2GetSmstLocation (\r | |
| 417 | IN CONST EFI_SMM_BASE2_PROTOCOL *This,\r | |
| 418 | OUT EFI_SMM_SYSTEM_TABLE2 **Smst\r | |
| 419 | )\r | |
| 420 | {\r | |
| 421 | if ((This == NULL) ||(Smst == NULL)) {\r | |
| 422 | return EFI_INVALID_PARAMETER;\r | |
| 423 | }\r | |
| 424 | \r | |
| 425 | if (!gSmmCorePrivate->InSmm) {\r | |
| 426 | return EFI_UNSUPPORTED;\r | |
| 427 | }\r | |
| 428 | \r | |
| 429 | *Smst = gSmmCorePrivate->Smst;\r | |
| 430 | \r | |
| 431 | return EFI_SUCCESS;\r | |
| 432 | }\r | |
| 433 | \r | |
| 434 | /**\r | |
| 435 | Communicates with a registered handler.\r | |
| 436 | \r | |
| 437 | This function provides a service to send and receive messages from a registered \r | |
| 438 | UEFI service. This function is part of the SMM Communication Protocol that may \r | |
| 439 | be called in physical mode prior to SetVirtualAddressMap() and in virtual mode \r | |
| 440 | after SetVirtualAddressMap().\r | |
| 441 | \r | |
| 442 | @param[in] This The EFI_SMM_COMMUNICATION_PROTOCOL instance.\r | |
| d1632f69 SZ |
443 | @param[in, out] CommBuffer A pointer to the buffer to convey into SMRAM.\r |
| 444 | @param[in, out] CommSize The size of the data buffer being passed in. On exit, the size of data\r | |
| e42e9404 | 445 | being returned. Zero if the handler does not wish to reply with any data.\r |
| d1632f69 | 446 | This parameter is optional and may be NULL.\r |
| e42e9404 | 447 | \r |
| 448 | @retval EFI_SUCCESS The message was successfully posted.\r | |
| 449 | @retval EFI_INVALID_PARAMETER The CommBuffer was NULL.\r | |
| d1632f69 SZ |
450 | @retval EFI_BAD_BUFFER_SIZE The buffer is too large for the MM implementation.\r |
| 451 | If this error is returned, the MessageLength field\r | |
| 452 | in the CommBuffer header or the integer pointed by\r | |
| 453 | CommSize, are updated to reflect the maximum payload\r | |
| 454 | size the implementation can accommodate.\r | |
| 455 | @retval EFI_ACCESS_DENIED The CommunicateBuffer parameter or CommSize parameter,\r | |
| 456 | if not omitted, are in address range that cannot be\r | |
| 457 | accessed by the MM environment.\r | |
| 458 | \r | |
| e42e9404 | 459 | **/\r |
| 460 | EFI_STATUS\r | |
| 461 | EFIAPI\r | |
| 462 | SmmCommunicationCommunicate (\r | |
| 463 | IN CONST EFI_SMM_COMMUNICATION_PROTOCOL *This,\r | |
| 464 | IN OUT VOID *CommBuffer,\r | |
| d1632f69 | 465 | IN OUT UINTN *CommSize OPTIONAL\r |
| e42e9404 | 466 | )\r |
| 467 | {\r | |
| 468 | EFI_STATUS Status;\r | |
| 469 | EFI_SMM_COMMUNICATE_HEADER *CommunicateHeader;\r | |
| 470 | BOOLEAN OldInSmm;\r | |
| d1632f69 | 471 | UINTN TempCommSize;\r |
| e42e9404 | 472 | \r |
| 473 | //\r | |
| 474 | // Check parameters\r | |
| 475 | //\r | |
| d1632f69 | 476 | if (CommBuffer == NULL) {\r |
| e42e9404 | 477 | return EFI_INVALID_PARAMETER;\r |
| 478 | }\r | |
| 479 | \r | |
| d1632f69 SZ |
480 | CommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) CommBuffer;\r |
| 481 | \r | |
| 482 | if (CommSize == NULL) {\r | |
| 483 | TempCommSize = OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + CommunicateHeader->MessageLength;\r | |
| 484 | } else {\r | |
| 485 | TempCommSize = *CommSize;\r | |
| 486 | //\r | |
| 487 | // CommSize must hold HeaderGuid and MessageLength\r | |
| 488 | //\r | |
| 489 | if (TempCommSize < OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)) {\r | |
| 490 | return EFI_INVALID_PARAMETER;\r | |
| 491 | }\r | |
| ab780ebf JY |
492 | }\r |
| 493 | \r | |
| e42e9404 | 494 | //\r |
| 495 | // If not already in SMM, then generate a Software SMI\r | |
| 496 | //\r | |
| 497 | if (!gSmmCorePrivate->InSmm && gSmmCorePrivate->SmmEntryPointRegistered) {\r | |
| 498 | //\r | |
| 499 | // Put arguments for Software SMI in gSmmCorePrivate\r | |
| 500 | //\r | |
| 501 | gSmmCorePrivate->CommunicationBuffer = CommBuffer;\r | |
| d1632f69 | 502 | gSmmCorePrivate->BufferSize = TempCommSize;\r |
| e42e9404 | 503 | \r |
| 504 | //\r | |
| 505 | // Generate Software SMI\r | |
| 506 | //\r | |
| 507 | Status = mSmmControl2->Trigger (mSmmControl2, NULL, NULL, FALSE, 0);\r | |
| 508 | if (EFI_ERROR (Status)) {\r | |
| 509 | return EFI_UNSUPPORTED;\r | |
| 510 | }\r | |
| 511 | \r | |
| 512 | //\r | |
| 513 | // Return status from software SMI \r | |
| 514 | //\r | |
| d1632f69 SZ |
515 | if (CommSize != NULL) {\r |
| 516 | *CommSize = gSmmCorePrivate->BufferSize;\r | |
| 517 | }\r | |
| e42e9404 | 518 | return gSmmCorePrivate->ReturnStatus;\r |
| 519 | }\r | |
| 520 | \r | |
| 521 | //\r | |
| 522 | // If we are in SMM, then the execution mode must be physical, which means that\r | |
| 523 | // OS established virtual addresses can not be used. If SetVirtualAddressMap()\r | |
| d1632f69 SZ |
524 | // has been called, then a direct invocation of the Software SMI is not allowed,\r |
| 525 | // so return EFI_INVALID_PARAMETER.\r | |
| e42e9404 | 526 | //\r |
| 527 | if (EfiGoneVirtual()) {\r | |
| 528 | return EFI_INVALID_PARAMETER;\r | |
| 529 | }\r | |
| 530 | \r | |
| 3c5963cf | 531 | //\r |
| 96756716 | 532 | // If we are not in SMM, don't allow call SmiManage() directly when SMRAM is closed or locked.\r |
| 3c5963cf | 533 | //\r |
| 96756716 | 534 | if ((!gSmmCorePrivate->InSmm) && (!mSmmAccess->OpenState || mSmmAccess->LockState)) {\r |
| 3c5963cf | 535 | return EFI_INVALID_PARAMETER;\r |
| 536 | }\r | |
| 537 | \r | |
| e42e9404 | 538 | //\r |
| 539 | // Save current InSmm state and set InSmm state to TRUE\r | |
| 540 | //\r | |
| 541 | OldInSmm = gSmmCorePrivate->InSmm;\r | |
| 542 | gSmmCorePrivate->InSmm = TRUE;\r | |
| 543 | \r | |
| 544 | //\r | |
| 4b5d69d3 | 545 | // Before SetVirtualAddressMap(), we are in SMM or SMRAM is open and unlocked, call SmiManage() directly.\r |
| e42e9404 | 546 | //\r |
| d1632f69 | 547 | TempCommSize -= OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);\r |
| e42e9404 | 548 | Status = gSmmCorePrivate->Smst->SmiManage (\r |
| 549 | &CommunicateHeader->HeaderGuid, \r | |
| 550 | NULL, \r | |
| 551 | CommunicateHeader->Data, \r | |
| d1632f69 | 552 | &TempCommSize\r |
| e42e9404 | 553 | );\r |
| d1632f69 SZ |
554 | TempCommSize += OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);\r |
| 555 | if (CommSize != NULL) {\r | |
| 556 | *CommSize = TempCommSize;\r | |
| 557 | }\r | |
| e42e9404 | 558 | \r |
| 559 | //\r | |
| 560 | // Restore original InSmm state\r | |
| 561 | //\r | |
| 562 | gSmmCorePrivate->InSmm = OldInSmm;\r | |
| 563 | \r | |
| d5b339a9 | 564 | return (Status == EFI_SUCCESS) ? EFI_SUCCESS : EFI_NOT_FOUND;\r |
| e42e9404 | 565 | }\r |
| 566 | \r | |
| 567 | /**\r | |
| 5657b268 | 568 | Event notification that is fired when GUIDed Event Group is signaled.\r |
| e42e9404 | 569 | \r |
| 570 | @param Event The Event that is being processed, not used.\r | |
| 571 | @param Context Event Context, not used.\r | |
| 572 | \r | |
| 573 | **/\r | |
| 574 | VOID\r | |
| 575 | EFIAPI\r | |
| 576 | SmmIplGuidedEventNotify (\r | |
| 577 | IN EFI_EVENT Event,\r | |
| 578 | IN VOID *Context\r | |
| 579 | )\r | |
| 580 | {\r | |
| e42e9404 | 581 | UINTN Size;\r |
| 582 | \r | |
| 583 | //\r | |
| 584 | // Use Guid to initialize EFI_SMM_COMMUNICATE_HEADER structure \r | |
| 585 | //\r | |
| 670a563f JY |
586 | CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);\r |
| 587 | mCommunicateHeader.MessageLength = 1;\r | |
| 588 | mCommunicateHeader.Data[0] = 0;\r | |
| e42e9404 | 589 | \r |
| 590 | //\r | |
| 591 | // Generate the Software SMI and return the result\r | |
| 592 | //\r | |
| 670a563f JY |
593 | Size = sizeof (mCommunicateHeader);\r |
| 594 | SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);\r | |
| e42e9404 | 595 | }\r |
| 596 | \r | |
| 265fff39 JF |
597 | /**\r |
| 598 | Event notification that is fired when EndOfDxe Event Group is signaled.\r | |
| 599 | \r | |
| 600 | @param Event The Event that is being processed, not used.\r | |
| 601 | @param Context Event Context, not used.\r | |
| 602 | \r | |
| 603 | **/\r | |
| 604 | VOID\r | |
| 605 | EFIAPI\r | |
| 606 | SmmIplEndOfDxeEventNotify (\r | |
| 607 | IN EFI_EVENT Event,\r | |
| 608 | IN VOID *Context\r | |
| 609 | )\r | |
| 610 | {\r | |
| 611 | mEndOfDxe = TRUE;\r | |
| 612 | }\r | |
| 613 | \r | |
| 5657b268 | 614 | /**\r |
| 615 | Event notification that is fired when DxeDispatch Event Group is signaled.\r | |
| 616 | \r | |
| 617 | @param Event The Event that is being processed, not used.\r | |
| 618 | @param Context Event Context, not used.\r | |
| 619 | \r | |
| 620 | **/\r | |
| 621 | VOID\r | |
| 622 | EFIAPI\r | |
| 623 | SmmIplDxeDispatchEventNotify (\r | |
| 624 | IN EFI_EVENT Event,\r | |
| 625 | IN VOID *Context\r | |
| 626 | )\r | |
| 627 | {\r | |
| 5657b268 | 628 | UINTN Size;\r |
| 629 | EFI_STATUS Status;\r | |
| 630 | \r | |
| 631 | //\r | |
| 632 | // Keep calling the SMM Core Dispatcher until there is no request to restart it.\r | |
| 633 | //\r | |
| 634 | while (TRUE) {\r | |
| 635 | //\r | |
| 636 | // Use Guid to initialize EFI_SMM_COMMUNICATE_HEADER structure\r | |
| 637 | // Clear the buffer passed into the Software SMI. This buffer will return\r | |
| 638 | // the status of the SMM Core Dispatcher.\r | |
| 639 | //\r | |
| 670a563f JY |
640 | CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);\r |
| 641 | mCommunicateHeader.MessageLength = 1;\r | |
| 642 | mCommunicateHeader.Data[0] = 0;\r | |
| 5657b268 | 643 | \r |
| 644 | //\r | |
| 645 | // Generate the Software SMI and return the result\r | |
| 646 | //\r | |
| 670a563f JY |
647 | Size = sizeof (mCommunicateHeader);\r |
| 648 | SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);\r | |
| 5657b268 | 649 | \r |
| 650 | //\r | |
| 651 | // Return if there is no request to restart the SMM Core Dispatcher\r | |
| 652 | //\r | |
| 670a563f | 653 | if (mCommunicateHeader.Data[0] != COMM_BUFFER_SMM_DISPATCH_RESTART) {\r |
| 5657b268 | 654 | return;\r |
| 655 | }\r | |
| 656 | \r | |
| 657 | //\r | |
| 658 | // Attempt to reset SMRAM cacheability to UC\r | |
| 659 | // Assume CPU AP is available at this time\r | |
| 660 | //\r | |
| 661 | Status = gDS->SetMemorySpaceAttributes(\r | |
| 662 | mSmramCacheBase, \r | |
| 663 | mSmramCacheSize,\r | |
| 664 | EFI_MEMORY_UC\r | |
| 665 | );\r | |
| 666 | if (EFI_ERROR (Status)) {\r | |
| 667 | DEBUG ((DEBUG_WARN, "SMM IPL failed to reset SMRAM window to EFI_MEMORY_UC\n"));\r | |
| 668 | } \r | |
| 669 | \r | |
| 670 | //\r | |
| 671 | // Close all SMRAM ranges to protect SMRAM\r | |
| 672 | //\r | |
| 673 | Status = mSmmAccess->Close (mSmmAccess);\r | |
| 674 | ASSERT_EFI_ERROR (Status);\r | |
| 675 | \r | |
| 676 | //\r | |
| 677 | // Print debug message that the SMRAM window is now closed.\r | |
| 678 | //\r | |
| 679 | DEBUG ((DEBUG_INFO, "SMM IPL closed SMRAM window\n"));\r | |
| 5657b268 | 680 | }\r |
| 681 | }\r | |
| 682 | \r | |
| e42e9404 | 683 | /**\r |
| 684 | Event notification that is fired every time a gEfiSmmConfigurationProtocol installs.\r | |
| 685 | \r | |
| 686 | @param Event The Event that is being processed, not used.\r | |
| 687 | @param Context Event Context, not used.\r | |
| 688 | \r | |
| 689 | **/\r | |
| 690 | VOID\r | |
| 691 | EFIAPI\r | |
| 692 | SmmIplSmmConfigurationEventNotify (\r | |
| 693 | IN EFI_EVENT Event,\r | |
| 694 | IN VOID *Context\r | |
| 695 | )\r | |
| 696 | {\r | |
| 697 | EFI_STATUS Status;\r | |
| 698 | EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;\r | |
| 699 | \r | |
| 700 | //\r | |
| 701 | // Make sure this notification is for this handler\r | |
| 702 | //\r | |
| 703 | Status = gBS->LocateProtocol (Context, NULL, (VOID **)&SmmConfiguration);\r | |
| 704 | if (EFI_ERROR (Status)) {\r | |
| 705 | return;\r | |
| 706 | }\r | |
| 707 | \r | |
| 708 | //\r | |
| 709 | // Register the SMM Entry Point provided by the SMM Core with the SMM COnfiguration protocol\r | |
| 710 | //\r | |
| 711 | Status = SmmConfiguration->RegisterSmmEntry (SmmConfiguration, gSmmCorePrivate->SmmEntryPoint);\r | |
| 712 | ASSERT_EFI_ERROR (Status);\r | |
| 713 | \r | |
| 714 | //\r | |
| 5657b268 | 715 | // Set flag to indicate that the SMM Entry Point has been registered which \r |
| e42e9404 | 716 | // means that SMIs are now fully operational.\r |
| 717 | //\r | |
| 718 | gSmmCorePrivate->SmmEntryPointRegistered = TRUE;\r | |
| 719 | \r | |
| 720 | //\r | |
| 721 | // Print debug message showing SMM Core entry point address.\r | |
| 722 | //\r | |
| 723 | DEBUG ((DEBUG_INFO, "SMM IPL registered SMM Entry Point address %p\n", (VOID *)(UINTN)gSmmCorePrivate->SmmEntryPoint));\r | |
| e42e9404 | 724 | }\r |
| 725 | \r | |
| 726 | /**\r | |
| 727 | Event notification that is fired every time a DxeSmmReadyToLock protocol is added\r | |
| 01331951 | 728 | or if gEfiEventReadyToBootGuid is signaled.\r |
| e42e9404 | 729 | \r |
| 730 | @param Event The Event that is being processed, not used.\r | |
| 731 | @param Context Event Context, not used.\r | |
| 732 | \r | |
| 733 | **/\r | |
| 734 | VOID\r | |
| 735 | EFIAPI\r | |
| 736 | SmmIplReadyToLockEventNotify (\r | |
| 737 | IN EFI_EVENT Event,\r | |
| 738 | IN VOID *Context\r | |
| 739 | )\r | |
| 740 | {\r | |
| 741 | EFI_STATUS Status;\r | |
| 742 | VOID *Interface;\r | |
| 743 | UINTN Index;\r | |
| 744 | \r | |
| 745 | //\r | |
| 746 | // See if we are already locked\r | |
| 747 | //\r | |
| 748 | if (mSmmLocked) {\r | |
| 749 | return;\r | |
| 750 | }\r | |
| 751 | \r | |
| 752 | //\r | |
| 753 | // Make sure this notification is for this handler\r | |
| 754 | //\r | |
| 755 | if (CompareGuid ((EFI_GUID *)Context, &gEfiDxeSmmReadyToLockProtocolGuid)) {\r | |
| 756 | Status = gBS->LocateProtocol (&gEfiDxeSmmReadyToLockProtocolGuid, NULL, &Interface);\r | |
| 757 | if (EFI_ERROR (Status)) {\r | |
| 758 | return;\r | |
| 759 | }\r | |
| 760 | } else {\r | |
| 761 | //\r | |
| 762 | // If SMM is not locked yet and we got here from gEfiEventReadyToBootGuid being \r | |
| 01331951 | 763 | // signaled, then gEfiDxeSmmReadyToLockProtocolGuid was not installed as expected.\r |
| e42e9404 | 764 | // Print a warning on debug builds.\r |
| 765 | //\r | |
| 766 | DEBUG ((DEBUG_WARN, "SMM IPL! DXE SMM Ready To Lock Protocol not installed before Ready To Boot signal\n"));\r | |
| 767 | }\r | |
| 768 | \r | |
| 265fff39 JF |
769 | if (!mEndOfDxe) {\r |
| 770 | DEBUG ((DEBUG_ERROR, "EndOfDxe Event must be signaled before DxeSmmReadyToLock Protocol installation!\n"));\r | |
| 771 | REPORT_STATUS_CODE (\r | |
| 772 | EFI_ERROR_CODE | EFI_ERROR_UNRECOVERED,\r | |
| 773 | (EFI_SOFTWARE_SMM_DRIVER | EFI_SW_EC_ILLEGAL_SOFTWARE_STATE)\r | |
| 774 | );\r | |
| 775 | ASSERT (FALSE);\r | |
| 776 | }\r | |
| 777 | \r | |
| e42e9404 | 778 | //\r |
| 779 | // Lock the SMRAM (Note: Locking SMRAM may not be supported on all platforms)\r | |
| 780 | //\r | |
| 781 | mSmmAccess->Lock (mSmmAccess);\r | |
| f02dfb5a | 782 | \r |
| e42e9404 | 783 | //\r |
| 784 | // Close protocol and event notification events that do not apply after the \r | |
| 785 | // DXE SMM Ready To Lock Protocol has been installed or the Ready To Boot \r | |
| 786 | // event has been signalled.\r | |
| 787 | //\r | |
| 788 | for (Index = 0; mSmmIplEvents[Index].NotifyFunction != NULL; Index++) {\r | |
| 789 | if (mSmmIplEvents[Index].CloseOnLock) {\r | |
| 790 | gBS->CloseEvent (mSmmIplEvents[Index].Event);\r | |
| 791 | }\r | |
| 792 | }\r | |
| 793 | \r | |
| 794 | //\r | |
| 795 | // Inform SMM Core that the DxeSmmReadyToLock protocol was installed\r | |
| 796 | //\r | |
| 797 | SmmIplGuidedEventNotify (Event, (VOID *)&gEfiDxeSmmReadyToLockProtocolGuid);\r | |
| 798 | \r | |
| 799 | //\r | |
| 800 | // Print debug message that the SMRAM window is now locked.\r | |
| 801 | //\r | |
| 802 | DEBUG ((DEBUG_INFO, "SMM IPL locked SMRAM window\n"));\r | |
| 803 | \r | |
| 804 | //\r | |
| 805 | // Set flag so this operation will not be performed again\r | |
| 806 | //\r | |
| 807 | mSmmLocked = TRUE;\r | |
| 808 | }\r | |
| 809 | \r | |
| 810 | /**\r | |
| 811 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
| 812 | \r | |
| 813 | This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r | |
| 814 | It convers pointer to new virtual address.\r | |
| 815 | \r | |
| 816 | @param Event Event whose notification function is being invoked.\r | |
| 817 | @param Context Pointer to the notification function's context.\r | |
| 818 | \r | |
| 819 | **/\r | |
| 820 | VOID\r | |
| 821 | EFIAPI\r | |
| 822 | SmmIplSetVirtualAddressNotify (\r | |
| 823 | IN EFI_EVENT Event,\r | |
| 824 | IN VOID *Context\r | |
| 825 | )\r | |
| 826 | {\r | |
| 827 | EfiConvertPointer (0x0, (VOID **)&mSmmControl2);\r | |
| 828 | }\r | |
| 829 | \r | |
| 3c447c27 | 830 | /**\r |
| 2048c585 | 831 | Get the fixed loading address from image header assigned by build tool. This function only be called\r |
| 3c447c27 | 832 | when Loading module at Fixed address feature enabled.\r |
| e42e9404 | 833 | \r |
| 3c447c27 | 834 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r |
| 835 | image that needs to be examined by this function.\r | |
| 836 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
| 2048c585 | 837 | @retval EFI_NOT_FOUND The image has no assigned fixed loading address.\r |
| 3c447c27 | 838 | **/\r |
| 839 | EFI_STATUS\r | |
| 840 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
| 841 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
| 842 | )\r | |
| 843 | {\r | |
| 844 | UINTN SectionHeaderOffset;\r | |
| 845 | EFI_STATUS Status;\r | |
| 846 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
| 847 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
| 2048c585 | 848 | EFI_PHYSICAL_ADDRESS FixLoadingAddress;\r |
| 3c447c27 | 849 | UINT16 Index;\r |
| 850 | UINTN Size;\r | |
| 851 | UINT16 NumberOfSections;\r | |
| 852 | EFI_PHYSICAL_ADDRESS SmramBase;\r | |
| 853 | UINT64 SmmCodeSize;\r | |
| 854 | UINT64 ValueInSectionHeader;\r | |
| 855 | //\r | |
| 856 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
| 857 | //\r | |
| 858 | SmmCodeSize = EFI_PAGES_TO_SIZE (PcdGet32(PcdLoadFixAddressSmmCodePageNumber));\r | |
| 859 | \r | |
| 2048c585 | 860 | FixLoadingAddress = 0;\r |
| 3c447c27 | 861 | Status = EFI_NOT_FOUND;\r |
| c2aeb66f | 862 | SmramBase = mLMFAConfigurationTable->SmramBase;\r |
| 3c447c27 | 863 | //\r |
| 864 | // Get PeHeader pointer\r | |
| 865 | //\r | |
| 866 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
| 16f69227 HW |
867 | SectionHeaderOffset = ImageContext->PeCoffHeaderOffset +\r |
| 868 | sizeof (UINT32) +\r | |
| 869 | sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
| 870 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader;\r | |
| 3c447c27 | 871 | NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;\r |
| 872 | \r | |
| 873 | //\r | |
| 874 | // Get base address from the first section header that doesn't point to code section.\r | |
| 875 | //\r | |
| 876 | for (Index = 0; Index < NumberOfSections; Index++) {\r | |
| 877 | //\r | |
| 878 | // Read section header from file\r | |
| 879 | //\r | |
| 880 | Size = sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
| 881 | Status = ImageContext->ImageRead (\r | |
| 882 | ImageContext->Handle,\r | |
| 883 | SectionHeaderOffset,\r | |
| 884 | &Size,\r | |
| 885 | &SectionHeader\r | |
| 886 | );\r | |
| 887 | if (EFI_ERROR (Status)) {\r | |
| 888 | return Status;\r | |
| 889 | }\r | |
| 890 | \r | |
| 891 | Status = EFI_NOT_FOUND;\r | |
| 892 | \r | |
| 893 | if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {\r | |
| 894 | //\r | |
| 895 | // Build tool saves the offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields in the\r | |
| 896 | // first section header that doesn't point to code section in image header. And there is an assumption that when the\r | |
| 897 | // feature is enabled, if a module is assigned a loading address by tools, PointerToRelocations & PointerToLineNumbers\r | |
| 2048c585 | 898 | // fields should NOT be Zero, or else, these 2 fields should be set to Zero\r |
| 3c447c27 | 899 | //\r |
| 900 | ValueInSectionHeader = ReadUnaligned64((UINT64*)&SectionHeader.PointerToRelocations);\r | |
| 901 | if (ValueInSectionHeader != 0) {\r | |
| 902 | //\r | |
| 2048c585 | 903 | // Found first section header that doesn't point to code section in which build tool saves the\r |
| 3c447c27 | 904 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r |
| 905 | //\r | |
| 2048c585 | 906 | FixLoadingAddress = (EFI_PHYSICAL_ADDRESS)(SmramBase + (INT64)ValueInSectionHeader);\r |
| 3c447c27 | 907 | \r |
| 2048c585 | 908 | if (SmramBase + SmmCodeSize > FixLoadingAddress && SmramBase <= FixLoadingAddress) {\r |
| 3c447c27 | 909 | //\r |
| 2048c585 | 910 | // The assigned address is valid. Return the specified loading address\r |
| 3c447c27 | 911 | //\r |
| 2048c585 | 912 | ImageContext->ImageAddress = FixLoadingAddress;\r |
| 3c447c27 | 913 | Status = EFI_SUCCESS;\r |
| 914 | }\r | |
| 915 | }\r | |
| 916 | break;\r | |
| 917 | }\r | |
| 918 | SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
| 919 | }\r | |
| 2048c585 | 920 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r \n", FixLoadingAddress, Status));\r |
| 3c447c27 | 921 | return Status;\r |
| 922 | }\r | |
| e42e9404 | 923 | /**\r |
| 924 | Load the SMM Core image into SMRAM and executes the SMM Core from SMRAM.\r | |
| 925 | \r | |
| c03beb76 SZ |
926 | @param[in, out] SmramRange Descriptor for the range of SMRAM to reload the \r |
| 927 | currently executing image, the rang of SMRAM to\r | |
| 928 | hold SMM Core will be excluded.\r | |
| 929 | @param[in, out] SmramRangeSmmCore Descriptor for the range of SMRAM to hold SMM Core.\r | |
| 930 | \r | |
| 931 | @param[in] Context Context to pass into SMM Core\r | |
| e42e9404 | 932 | \r |
| 933 | @return EFI_STATUS\r | |
| 934 | \r | |
| 935 | **/\r | |
| 936 | EFI_STATUS\r | |
| 937 | ExecuteSmmCoreFromSmram (\r | |
| c03beb76 SZ |
938 | IN OUT EFI_SMRAM_DESCRIPTOR *SmramRange,\r |
| 939 | IN OUT EFI_SMRAM_DESCRIPTOR *SmramRangeSmmCore,\r | |
| 940 | IN VOID *Context\r | |
| e42e9404 | 941 | )\r |
| 942 | {\r | |
| 943 | EFI_STATUS Status;\r | |
| 944 | VOID *SourceBuffer;\r | |
| 945 | UINTN SourceSize;\r | |
| 946 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
| 947 | UINTN PageCount;\r | |
| e42e9404 | 948 | EFI_IMAGE_ENTRY_POINT EntryPoint;\r |
| 949 | \r | |
| 950 | //\r | |
| 951 | // Search all Firmware Volumes for a PE/COFF image in a file of type SMM_CORE\r | |
| 952 | // \r | |
| d7aaf1dc LG |
953 | Status = GetSectionFromAnyFvByFileType (\r |
| 954 | EFI_FV_FILETYPE_SMM_CORE, \r | |
| 955 | 0,\r | |
| 956 | EFI_SECTION_PE32, \r | |
| 957 | 0,\r | |
| 958 | &SourceBuffer, \r | |
| 959 | &SourceSize\r | |
| 960 | );\r | |
| 961 | if (EFI_ERROR (Status)) {\r | |
| 962 | return Status;\r | |
| e42e9404 | 963 | }\r |
| 964 | \r | |
| 965 | //\r | |
| 966 | // Initilize ImageContext\r | |
| 967 | //\r | |
| 968 | ImageContext.Handle = SourceBuffer;\r | |
| 969 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r | |
| 970 | \r | |
| 971 | //\r | |
| 972 | // Get information about the image being loaded\r | |
| 973 | //\r | |
| 974 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
| 975 | if (EFI_ERROR (Status)) {\r | |
| 976 | return Status;\r | |
| 977 | }\r | |
| e42e9404 | 978 | //\r |
| 3c447c27 | 979 | // if Loading module at Fixed Address feature is enabled, the SMM core driver will be loaded to \r |
| 980 | // the address assigned by build tool.\r | |
| e42e9404 | 981 | //\r |
| 3c447c27 | 982 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r |
| 983 | //\r | |
| 984 | // Get the fixed loading address assigned by Build tool\r | |
| 985 | //\r | |
| 986 | Status = GetPeCoffImageFixLoadingAssignedAddress (&ImageContext);\r | |
| 987 | if (!EFI_ERROR (Status)) {\r | |
| 988 | //\r | |
| 989 | // Since the memory range to load SMM CORE will be cut out in SMM core, so no need to allocate and free this range\r | |
| 990 | //\r | |
| 991 | PageCount = 0;\r | |
| a7d10bb0 LG |
992 | //\r |
| 993 | // Reserved Smram Region for SmmCore is not used, and remove it from SmramRangeCount.\r | |
| 994 | //\r | |
| 995 | gSmmCorePrivate->SmramRangeCount --;\r | |
| c03beb76 | 996 | } else {\r |
| 3c447c27 | 997 | DEBUG ((EFI_D_INFO, "LOADING MODULE FIXED ERROR: Loading module at fixed address at address failed\n"));\r |
| 998 | //\r | |
| 999 | // Allocate memory for the image being loaded from the EFI_SRAM_DESCRIPTOR \r | |
| 1000 | // specified by SmramRange\r | |
| 1001 | //\r | |
| e0e7f80c | 1002 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
| e42e9404 | 1003 | \r |
| 3c447c27 | 1004 | ASSERT ((SmramRange->PhysicalSize & EFI_PAGE_MASK) == 0);\r |
| 1005 | ASSERT (SmramRange->PhysicalSize > EFI_PAGES_TO_SIZE (PageCount));\r | |
| e42e9404 | 1006 | \r |
| 3c447c27 | 1007 | SmramRange->PhysicalSize -= EFI_PAGES_TO_SIZE (PageCount);\r |
| c03beb76 SZ |
1008 | SmramRangeSmmCore->CpuStart = SmramRange->CpuStart + SmramRange->PhysicalSize;\r |
| 1009 | SmramRangeSmmCore->PhysicalStart = SmramRange->PhysicalStart + SmramRange->PhysicalSize;\r | |
| 1010 | SmramRangeSmmCore->RegionState = SmramRange->RegionState | EFI_ALLOCATED;\r | |
| 1011 | SmramRangeSmmCore->PhysicalSize = EFI_PAGES_TO_SIZE (PageCount);\r | |
| e42e9404 | 1012 | \r |
| 3c447c27 | 1013 | //\r |
| c03beb76 | 1014 | // Align buffer on section boundary\r |
| 3c447c27 | 1015 | //\r |
| c03beb76 | 1016 | ImageContext.ImageAddress = SmramRangeSmmCore->CpuStart;\r |
| 3c447c27 | 1017 | }\r |
| 1018 | } else {\r | |
| 1019 | //\r | |
| 1020 | // Allocate memory for the image being loaded from the EFI_SRAM_DESCRIPTOR \r | |
| 1021 | // specified by SmramRange\r | |
| 1022 | //\r | |
| e0e7f80c | 1023 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
| 3c447c27 | 1024 | \r |
| 1025 | ASSERT ((SmramRange->PhysicalSize & EFI_PAGE_MASK) == 0);\r | |
| 1026 | ASSERT (SmramRange->PhysicalSize > EFI_PAGES_TO_SIZE (PageCount));\r | |
| 1027 | \r | |
| 1028 | SmramRange->PhysicalSize -= EFI_PAGES_TO_SIZE (PageCount);\r | |
| c03beb76 SZ |
1029 | SmramRangeSmmCore->CpuStart = SmramRange->CpuStart + SmramRange->PhysicalSize;\r |
| 1030 | SmramRangeSmmCore->PhysicalStart = SmramRange->PhysicalStart + SmramRange->PhysicalSize;\r | |
| 1031 | SmramRangeSmmCore->RegionState = SmramRange->RegionState | EFI_ALLOCATED;\r | |
| 1032 | SmramRangeSmmCore->PhysicalSize = EFI_PAGES_TO_SIZE (PageCount);\r | |
| 3c447c27 | 1033 | \r |
| 1034 | //\r | |
| c03beb76 | 1035 | // Align buffer on section boundary\r |
| 3c447c27 | 1036 | //\r |
| c03beb76 | 1037 | ImageContext.ImageAddress = SmramRangeSmmCore->CpuStart;\r |
| 3c447c27 | 1038 | }\r |
| 1039 | \r | |
| e42e9404 | 1040 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r |
| 16f69227 | 1041 | ImageContext.ImageAddress &= ~((EFI_PHYSICAL_ADDRESS)ImageContext.SectionAlignment - 1);\r |
| e42e9404 | 1042 | \r |
| 1043 | //\r | |
| 1044 | // Print debug message showing SMM Core load address.\r | |
| 1045 | //\r | |
| 1046 | DEBUG ((DEBUG_INFO, "SMM IPL loading SMM Core at SMRAM address %p\n", (VOID *)(UINTN)ImageContext.ImageAddress));\r | |
| 1047 | \r | |
| 1048 | //\r | |
| 1049 | // Load the image to our new buffer\r | |
| 1050 | //\r | |
| 1051 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
| 1052 | if (!EFI_ERROR (Status)) {\r | |
| 1053 | //\r | |
| 1054 | // Relocate the image in our new buffer\r | |
| 1055 | //\r | |
| 1056 | Status = PeCoffLoaderRelocateImage (&ImageContext);\r | |
| 1057 | if (!EFI_ERROR (Status)) {\r | |
| 1058 | //\r | |
| 1059 | // Flush the instruction cache so the image data are written before we execute it\r | |
| 1060 | //\r | |
| 1061 | InvalidateInstructionCacheRange ((VOID *)(UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.ImageSize);\r | |
| 1062 | \r | |
| 1063 | //\r | |
| 1064 | // Print debug message showing SMM Core entry point address.\r | |
| 1065 | //\r | |
| 1066 | DEBUG ((DEBUG_INFO, "SMM IPL calling SMM Core at SMRAM address %p\n", (VOID *)(UINTN)ImageContext.EntryPoint));\r | |
| 1067 | \r | |
| 84edd20b SZ |
1068 | gSmmCorePrivate->PiSmmCoreImageBase = ImageContext.ImageAddress;\r |
| 1069 | gSmmCorePrivate->PiSmmCoreImageSize = ImageContext.ImageSize;\r | |
| 1070 | DEBUG ((DEBUG_INFO, "PiSmmCoreImageBase - 0x%016lx\n", gSmmCorePrivate->PiSmmCoreImageBase));\r | |
| 1071 | DEBUG ((DEBUG_INFO, "PiSmmCoreImageSize - 0x%016lx\n", gSmmCorePrivate->PiSmmCoreImageSize));\r | |
| 1072 | \r | |
| 1073 | gSmmCorePrivate->PiSmmCoreEntryPoint = ImageContext.EntryPoint;\r | |
| 1074 | \r | |
| e42e9404 | 1075 | //\r |
| 1076 | // Execute image\r | |
| 1077 | //\r | |
| 1078 | EntryPoint = (EFI_IMAGE_ENTRY_POINT)(UINTN)ImageContext.EntryPoint;\r | |
| 1079 | Status = EntryPoint ((EFI_HANDLE)Context, gST);\r | |
| 1080 | }\r | |
| 1081 | }\r | |
| 1082 | \r | |
| 1083 | //\r | |
| c03beb76 | 1084 | // Always free memory allocted by GetFileBufferByFilePath ()\r |
| e42e9404 | 1085 | //\r |
| c03beb76 SZ |
1086 | FreePool (SourceBuffer);\r |
| 1087 | \r | |
| 1088 | return Status;\r | |
| 1089 | }\r | |
| 1090 | \r | |
| 1091 | /**\r | |
| 1092 | SMM split SMRAM entry.\r | |
| 1093 | \r | |
| 1094 | @param[in, out] RangeToCompare Pointer to EFI_SMRAM_DESCRIPTOR to compare.\r | |
| 1095 | @param[in, out] ReservedRangeToCompare Pointer to EFI_SMM_RESERVED_SMRAM_REGION to compare.\r | |
| 1096 | @param[out] Ranges Output pointer to hold split EFI_SMRAM_DESCRIPTOR entry.\r | |
| 1097 | @param[in, out] RangeCount Pointer to range count.\r | |
| 1098 | @param[out] ReservedRanges Output pointer to hold split EFI_SMM_RESERVED_SMRAM_REGION entry.\r | |
| 1099 | @param[in, out] ReservedRangeCount Pointer to reserved range count.\r | |
| 1100 | @param[out] FinalRanges Output pointer to hold split final EFI_SMRAM_DESCRIPTOR entry\r | |
| 1101 | that no need to be split anymore.\r | |
| 1102 | @param[in, out] FinalRangeCount Pointer to final range count.\r | |
| 1103 | \r | |
| 1104 | **/\r | |
| 1105 | VOID\r | |
| 1106 | SmmSplitSmramEntry (\r | |
| 1107 | IN OUT EFI_SMRAM_DESCRIPTOR *RangeToCompare,\r | |
| 1108 | IN OUT EFI_SMM_RESERVED_SMRAM_REGION *ReservedRangeToCompare,\r | |
| 1109 | OUT EFI_SMRAM_DESCRIPTOR *Ranges,\r | |
| 1110 | IN OUT UINTN *RangeCount,\r | |
| 1111 | OUT EFI_SMM_RESERVED_SMRAM_REGION *ReservedRanges,\r | |
| 1112 | IN OUT UINTN *ReservedRangeCount,\r | |
| 1113 | OUT EFI_SMRAM_DESCRIPTOR *FinalRanges,\r | |
| 1114 | IN OUT UINTN *FinalRangeCount\r | |
| 1115 | )\r | |
| 1116 | {\r | |
| 1117 | UINT64 RangeToCompareEnd;\r | |
| 1118 | UINT64 ReservedRangeToCompareEnd;\r | |
| 1119 | \r | |
| 1120 | RangeToCompareEnd = RangeToCompare->CpuStart + RangeToCompare->PhysicalSize;\r | |
| 1121 | ReservedRangeToCompareEnd = ReservedRangeToCompare->SmramReservedStart + ReservedRangeToCompare->SmramReservedSize;\r | |
| 1122 | \r | |
| 1123 | if ((RangeToCompare->CpuStart >= ReservedRangeToCompare->SmramReservedStart) &&\r | |
| 1124 | (RangeToCompare->CpuStart < ReservedRangeToCompareEnd)) {\r | |
| 1125 | if (RangeToCompareEnd < ReservedRangeToCompareEnd) {\r | |
| 1126 | //\r | |
| 1127 | // RangeToCompare ReservedRangeToCompare\r | |
| 1128 | // ---- ---- --------------------------------------\r | |
| 1129 | // | | | | -> 1. ReservedRangeToCompare\r | |
| 1130 | // ---- | | |--| --------------------------------------\r | |
| 1131 | // | | | | | |\r | |
| 1132 | // | | | | | | -> 2. FinalRanges[*FinalRangeCount] and increment *FinalRangeCount\r | |
| 1133 | // | | | | | | RangeToCompare->PhysicalSize = 0\r | |
| 1134 | // ---- | | |--| --------------------------------------\r | |
| 1135 | // | | | | -> 3. ReservedRanges[*ReservedRangeCount] and increment *ReservedRangeCount\r | |
| 1136 | // ---- ---- --------------------------------------\r | |
| 1137 | //\r | |
| 1138 | \r | |
| 1139 | //\r | |
| 1140 | // 1. Update ReservedRangeToCompare.\r | |
| 1141 | //\r | |
| 1142 | ReservedRangeToCompare->SmramReservedSize = RangeToCompare->CpuStart - ReservedRangeToCompare->SmramReservedStart;\r | |
| 1143 | //\r | |
| 1144 | // 2. Update FinalRanges[FinalRangeCount] and increment *FinalRangeCount.\r | |
| 1145 | // Zero RangeToCompare->PhysicalSize.\r | |
| 1146 | //\r | |
| 1147 | FinalRanges[*FinalRangeCount].CpuStart = RangeToCompare->CpuStart;\r | |
| 1148 | FinalRanges[*FinalRangeCount].PhysicalStart = RangeToCompare->PhysicalStart;\r | |
| 1149 | FinalRanges[*FinalRangeCount].RegionState = RangeToCompare->RegionState | EFI_ALLOCATED;\r | |
| 1150 | FinalRanges[*FinalRangeCount].PhysicalSize = RangeToCompare->PhysicalSize;\r | |
| 1151 | *FinalRangeCount += 1;\r | |
| 1152 | RangeToCompare->PhysicalSize = 0;\r | |
| 1153 | //\r | |
| 1154 | // 3. Update ReservedRanges[*ReservedRangeCount] and increment *ReservedRangeCount.\r | |
| 1155 | //\r | |
| 1156 | ReservedRanges[*ReservedRangeCount].SmramReservedStart = FinalRanges[*FinalRangeCount - 1].CpuStart + FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1157 | ReservedRanges[*ReservedRangeCount].SmramReservedSize = ReservedRangeToCompareEnd - RangeToCompareEnd;\r | |
| 1158 | *ReservedRangeCount += 1;\r | |
| 1159 | } else {\r | |
| 1160 | //\r | |
| 1161 | // RangeToCompare ReservedRangeToCompare\r | |
| 1162 | // ---- ---- --------------------------------------\r | |
| 1163 | // | | | | -> 1. ReservedRangeToCompare\r | |
| 1164 | // ---- | | |--| --------------------------------------\r | |
| 1165 | // | | | | | |\r | |
| 1166 | // | | | | | | -> 2. FinalRanges[*FinalRangeCount] and increment *FinalRangeCount\r | |
| 1167 | // | | | | | |\r | |
| 1168 | // | | ---- |--| --------------------------------------\r | |
| 1169 | // | | | | -> 3. RangeToCompare\r | |
| 1170 | // ---- ---- --------------------------------------\r | |
| 1171 | //\r | |
| 1172 | \r | |
| 1173 | //\r | |
| 1174 | // 1. Update ReservedRangeToCompare.\r | |
| 1175 | //\r | |
| 1176 | ReservedRangeToCompare->SmramReservedSize = RangeToCompare->CpuStart - ReservedRangeToCompare->SmramReservedStart;\r | |
| 1177 | //\r | |
| 1178 | // 2. Update FinalRanges[FinalRangeCount] and increment *FinalRangeCount.\r | |
| 1179 | //\r | |
| 1180 | FinalRanges[*FinalRangeCount].CpuStart = RangeToCompare->CpuStart;\r | |
| 1181 | FinalRanges[*FinalRangeCount].PhysicalStart = RangeToCompare->PhysicalStart;\r | |
| 1182 | FinalRanges[*FinalRangeCount].RegionState = RangeToCompare->RegionState | EFI_ALLOCATED;\r | |
| 1183 | FinalRanges[*FinalRangeCount].PhysicalSize = ReservedRangeToCompareEnd - RangeToCompare->CpuStart;\r | |
| 1184 | *FinalRangeCount += 1;\r | |
| 1185 | //\r | |
| 1186 | // 3. Update RangeToCompare.\r | |
| 1187 | //\r | |
| 1188 | RangeToCompare->CpuStart += FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1189 | RangeToCompare->PhysicalStart += FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1190 | RangeToCompare->PhysicalSize -= FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1191 | }\r | |
| 1192 | } else if ((ReservedRangeToCompare->SmramReservedStart >= RangeToCompare->CpuStart) &&\r | |
| 1193 | (ReservedRangeToCompare->SmramReservedStart < RangeToCompareEnd)) {\r | |
| 1194 | if (ReservedRangeToCompareEnd < RangeToCompareEnd) {\r | |
| 1195 | //\r | |
| 1196 | // RangeToCompare ReservedRangeToCompare\r | |
| 1197 | // ---- ---- --------------------------------------\r | |
| 1198 | // | | | | -> 1. RangeToCompare\r | |
| 1199 | // | | ---- |--| --------------------------------------\r | |
| 1200 | // | | | | | |\r | |
| 1201 | // | | | | | | -> 2. FinalRanges[*FinalRangeCount] and increment *FinalRangeCount\r | |
| 1202 | // | | | | | | ReservedRangeToCompare->SmramReservedSize = 0\r | |
| 1203 | // | | ---- |--| --------------------------------------\r | |
| 1204 | // | | | | -> 3. Ranges[*RangeCount] and increment *RangeCount\r | |
| 1205 | // ---- ---- --------------------------------------\r | |
| 1206 | //\r | |
| 1207 | \r | |
| 1208 | //\r | |
| 1209 | // 1. Update RangeToCompare.\r | |
| 1210 | //\r | |
| 1211 | RangeToCompare->PhysicalSize = ReservedRangeToCompare->SmramReservedStart - RangeToCompare->CpuStart;\r | |
| 1212 | //\r | |
| 1213 | // 2. Update FinalRanges[FinalRangeCount] and increment *FinalRangeCount.\r | |
| 1214 | // ReservedRangeToCompare->SmramReservedSize = 0\r | |
| 1215 | //\r | |
| 1216 | FinalRanges[*FinalRangeCount].CpuStart = ReservedRangeToCompare->SmramReservedStart;\r | |
| 1217 | FinalRanges[*FinalRangeCount].PhysicalStart = RangeToCompare->PhysicalStart + RangeToCompare->PhysicalSize;\r | |
| 1218 | FinalRanges[*FinalRangeCount].RegionState = RangeToCompare->RegionState | EFI_ALLOCATED;\r | |
| 1219 | FinalRanges[*FinalRangeCount].PhysicalSize = ReservedRangeToCompare->SmramReservedSize;\r | |
| 1220 | *FinalRangeCount += 1;\r | |
| 1221 | ReservedRangeToCompare->SmramReservedSize = 0;\r | |
| 1222 | //\r | |
| 1223 | // 3. Update Ranges[*RangeCount] and increment *RangeCount.\r | |
| 1224 | //\r | |
| 1225 | Ranges[*RangeCount].CpuStart = FinalRanges[*FinalRangeCount - 1].CpuStart + FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1226 | Ranges[*RangeCount].PhysicalStart = FinalRanges[*FinalRangeCount - 1].PhysicalStart + FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1227 | Ranges[*RangeCount].RegionState = RangeToCompare->RegionState;\r | |
| 1228 | Ranges[*RangeCount].PhysicalSize = RangeToCompareEnd - ReservedRangeToCompareEnd;\r | |
| 1229 | *RangeCount += 1;\r | |
| 1230 | } else {\r | |
| 1231 | //\r | |
| 1232 | // RangeToCompare ReservedRangeToCompare\r | |
| 1233 | // ---- ---- --------------------------------------\r | |
| 1234 | // | | | | -> 1. RangeToCompare\r | |
| 1235 | // | | ---- |--| --------------------------------------\r | |
| 1236 | // | | | | | |\r | |
| 1237 | // | | | | | | -> 2. FinalRanges[*FinalRangeCount] and increment *FinalRangeCount\r | |
| 1238 | // | | | | | |\r | |
| 1239 | // ---- | | |--| --------------------------------------\r | |
| 1240 | // | | | | -> 3. ReservedRangeToCompare\r | |
| 1241 | // ---- ---- --------------------------------------\r | |
| 1242 | //\r | |
| 1243 | \r | |
| 1244 | //\r | |
| 1245 | // 1. Update RangeToCompare.\r | |
| 1246 | //\r | |
| 1247 | RangeToCompare->PhysicalSize = ReservedRangeToCompare->SmramReservedStart - RangeToCompare->CpuStart;\r | |
| 1248 | //\r | |
| 1249 | // 2. Update FinalRanges[FinalRangeCount] and increment *FinalRangeCount.\r | |
| 1250 | // ReservedRangeToCompare->SmramReservedSize = 0\r | |
| 1251 | //\r | |
| 1252 | FinalRanges[*FinalRangeCount].CpuStart = ReservedRangeToCompare->SmramReservedStart;\r | |
| 1253 | FinalRanges[*FinalRangeCount].PhysicalStart = RangeToCompare->PhysicalStart + RangeToCompare->PhysicalSize;\r | |
| 1254 | FinalRanges[*FinalRangeCount].RegionState = RangeToCompare->RegionState | EFI_ALLOCATED;\r | |
| 1255 | FinalRanges[*FinalRangeCount].PhysicalSize = RangeToCompareEnd - ReservedRangeToCompare->SmramReservedStart;\r | |
| 1256 | *FinalRangeCount += 1;\r | |
| 1257 | //\r | |
| 1258 | // 3. Update ReservedRangeToCompare.\r | |
| 1259 | //\r | |
| 1260 | ReservedRangeToCompare->SmramReservedStart += FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1261 | ReservedRangeToCompare->SmramReservedSize -= FinalRanges[*FinalRangeCount - 1].PhysicalSize;\r | |
| 1262 | }\r | |
| 1263 | }\r | |
| 1264 | }\r | |
| 1265 | \r | |
| 1266 | /**\r | |
| 1267 | Returns if SMRAM range and SMRAM reserved range are overlapped.\r | |
| 1268 | \r | |
| 1269 | @param[in] RangeToCompare Pointer to EFI_SMRAM_DESCRIPTOR to compare.\r | |
| 1270 | @param[in] ReservedRangeToCompare Pointer to EFI_SMM_RESERVED_SMRAM_REGION to compare.\r | |
| 1271 | \r | |
| 1272 | @retval TRUE There is overlap.\r | |
| 1273 | @retval FALSE There is no overlap.\r | |
| 1274 | \r | |
| 1275 | **/\r | |
| 1276 | BOOLEAN\r | |
| 1277 | SmmIsSmramOverlap (\r | |
| 1278 | IN EFI_SMRAM_DESCRIPTOR *RangeToCompare,\r | |
| 1279 | IN EFI_SMM_RESERVED_SMRAM_REGION *ReservedRangeToCompare\r | |
| 1280 | )\r | |
| 1281 | {\r | |
| 1282 | UINT64 RangeToCompareEnd;\r | |
| 1283 | UINT64 ReservedRangeToCompareEnd;\r | |
| 1284 | \r | |
| 1285 | RangeToCompareEnd = RangeToCompare->CpuStart + RangeToCompare->PhysicalSize;\r | |
| 1286 | ReservedRangeToCompareEnd = ReservedRangeToCompare->SmramReservedStart + ReservedRangeToCompare->SmramReservedSize;\r | |
| 1287 | \r | |
| 1288 | if ((RangeToCompare->CpuStart >= ReservedRangeToCompare->SmramReservedStart) &&\r | |
| 1289 | (RangeToCompare->CpuStart < ReservedRangeToCompareEnd)) {\r | |
| 1290 | return TRUE;\r | |
| 1291 | } else if ((ReservedRangeToCompare->SmramReservedStart >= RangeToCompare->CpuStart) &&\r | |
| 1292 | (ReservedRangeToCompare->SmramReservedStart < RangeToCompareEnd)) {\r | |
| 1293 | return TRUE;\r | |
| e42e9404 | 1294 | }\r |
| c03beb76 SZ |
1295 | return FALSE;\r |
| 1296 | }\r | |
| 1297 | \r | |
| 1298 | /**\r | |
| 1299 | Get full SMRAM ranges.\r | |
| e42e9404 | 1300 | \r |
| c03beb76 SZ |
1301 | It will get SMRAM ranges from SmmAccess protocol and SMRAM reserved ranges from\r |
| 1302 | SmmConfiguration protocol, split the entries if there is overlap between them.\r | |
| 1303 | It will also reserve one entry for SMM core.\r | |
| 1304 | \r | |
| 1305 | @param[out] FullSmramRangeCount Output pointer to full SMRAM range count.\r | |
| 1306 | \r | |
| 1307 | @return Pointer to full SMRAM ranges.\r | |
| 1308 | \r | |
| 1309 | **/\r | |
| 1310 | EFI_SMRAM_DESCRIPTOR *\r | |
| 1311 | GetFullSmramRanges (\r | |
| 1312 | OUT UINTN *FullSmramRangeCount\r | |
| 1313 | )\r | |
| 1314 | {\r | |
| 1315 | EFI_STATUS Status;\r | |
| 1316 | EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;\r | |
| 1317 | UINTN Size;\r | |
| 1318 | UINTN Index;\r | |
| 1319 | UINTN Index2;\r | |
| 1320 | EFI_SMRAM_DESCRIPTOR *FullSmramRanges;\r | |
| 1321 | UINTN TempSmramRangeCount;\r | |
| a7d10bb0 | 1322 | UINTN AdditionSmramRangeCount;\r |
| c03beb76 SZ |
1323 | EFI_SMRAM_DESCRIPTOR *TempSmramRanges;\r |
| 1324 | UINTN SmramRangeCount;\r | |
| 1325 | EFI_SMRAM_DESCRIPTOR *SmramRanges;\r | |
| 1326 | UINTN SmramReservedCount;\r | |
| 1327 | EFI_SMM_RESERVED_SMRAM_REGION *SmramReservedRanges;\r | |
| 1328 | UINTN MaxCount;\r | |
| 1329 | BOOLEAN Rescan;\r | |
| 1330 | \r | |
| 1331 | //\r | |
| 1332 | // Get SMM Configuration Protocol if it is present.\r | |
| e42e9404 | 1333 | //\r |
| c03beb76 SZ |
1334 | SmmConfiguration = NULL;\r |
| 1335 | Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **) &SmmConfiguration);\r | |
| 1336 | \r | |
| e42e9404 | 1337 | //\r |
| c03beb76 SZ |
1338 | // Get SMRAM information.\r |
| 1339 | //\r | |
| 1340 | Size = 0;\r | |
| 1341 | Status = mSmmAccess->GetCapabilities (mSmmAccess, &Size, NULL);\r | |
| 1342 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
| e42e9404 | 1343 | \r |
| c03beb76 SZ |
1344 | SmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);\r |
| 1345 | \r | |
| 1346 | //\r | |
| 1347 | // Get SMRAM reserved region count.\r | |
| 1348 | //\r | |
| 1349 | SmramReservedCount = 0;\r | |
| 1350 | if (SmmConfiguration != NULL) {\r | |
| 1351 | while (SmmConfiguration->SmramReservedRegions[SmramReservedCount].SmramReservedSize != 0) {\r | |
| 1352 | SmramReservedCount++;\r | |
| 1353 | }\r | |
| 1354 | }\r | |
| 1355 | \r | |
| a7d10bb0 LG |
1356 | //\r |
| 1357 | // Reserve one entry for SMM Core in the full SMRAM ranges.\r | |
| 1358 | //\r | |
| 1359 | AdditionSmramRangeCount = 1;\r | |
| 1360 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
| 1361 | //\r | |
| 1362 | // Reserve two entries for all SMM drivers and SMM Core in the full SMRAM ranges.\r | |
| 1363 | //\r | |
| 1364 | AdditionSmramRangeCount = 2;\r | |
| 1365 | }\r | |
| 1366 | \r | |
| c03beb76 SZ |
1367 | if (SmramReservedCount == 0) {\r |
| 1368 | //\r | |
| 1369 | // No reserved SMRAM entry from SMM Configuration Protocol.\r | |
| c03beb76 | 1370 | //\r |
| a7d10bb0 | 1371 | *FullSmramRangeCount = SmramRangeCount + AdditionSmramRangeCount;\r |
| c03beb76 | 1372 | Size = (*FullSmramRangeCount) * sizeof (EFI_SMRAM_DESCRIPTOR);\r |
| 08308fc9 | 1373 | FullSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocateZeroPool (Size);\r |
| c03beb76 SZ |
1374 | ASSERT (FullSmramRanges != NULL);\r |
| 1375 | \r | |
| 1376 | Status = mSmmAccess->GetCapabilities (mSmmAccess, &Size, FullSmramRanges);\r | |
| 1377 | ASSERT_EFI_ERROR (Status);\r | |
| 1378 | \r | |
| 1379 | return FullSmramRanges;\r | |
| 1380 | }\r | |
| 1381 | \r | |
| 1382 | //\r | |
| 1383 | // Why MaxCount = X + 2 * Y?\r | |
| 1384 | // Take Y = 1 as example below, Y > 1 case is just the iteration of Y = 1.\r | |
| 1385 | //\r | |
| 1386 | // X = 1 Y = 1 MaxCount = 3 = 1 + 2 * 1\r | |
| 1387 | // ---- ----\r | |
| 1388 | // | | ---- |--|\r | |
| 1389 | // | | | | -> | |\r | |
| 1390 | // | | ---- |--|\r | |
| 1391 | // ---- ----\r | |
| 1392 | //\r | |
| 1393 | // X = 2 Y = 1 MaxCount = 4 = 2 + 2 * 1\r | |
| 1394 | // ---- ----\r | |
| 1395 | // | | | |\r | |
| 1396 | // | | ---- |--|\r | |
| 1397 | // | | | | | |\r | |
| 1398 | // |--| | | -> |--|\r | |
| 1399 | // | | | | | |\r | |
| 1400 | // | | ---- |--|\r | |
| 1401 | // | | | |\r | |
| 1402 | // ---- ----\r | |
| 1403 | //\r | |
| 1404 | // X = 3 Y = 1 MaxCount = 5 = 3 + 2 * 1\r | |
| 1405 | // ---- ----\r | |
| 1406 | // | | | |\r | |
| 1407 | // | | ---- |--|\r | |
| 1408 | // |--| | | |--|\r | |
| 1409 | // | | | | -> | |\r | |
| 1410 | // |--| | | |--|\r | |
| 1411 | // | | ---- |--|\r | |
| 1412 | // | | | |\r | |
| 1413 | // ---- ----\r | |
| 1414 | //\r | |
| 1415 | // ......\r | |
| 1416 | //\r | |
| 1417 | MaxCount = SmramRangeCount + 2 * SmramReservedCount;\r | |
| 1418 | \r | |
| 1419 | Size = MaxCount * sizeof (EFI_SMM_RESERVED_SMRAM_REGION);\r | |
| 1420 | SmramReservedRanges = (EFI_SMM_RESERVED_SMRAM_REGION *) AllocatePool (Size);\r | |
| 1421 | ASSERT (SmramReservedRanges != NULL);\r | |
| 1422 | for (Index = 0; Index < SmramReservedCount; Index++) {\r | |
| 1423 | CopyMem (&SmramReservedRanges[Index], &SmmConfiguration->SmramReservedRegions[Index], sizeof (EFI_SMM_RESERVED_SMRAM_REGION));\r | |
| 1424 | }\r | |
| 1425 | \r | |
| 1426 | Size = MaxCount * sizeof (EFI_SMRAM_DESCRIPTOR);\r | |
| 1427 | TempSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);\r | |
| 1428 | ASSERT (TempSmramRanges != NULL);\r | |
| 1429 | TempSmramRangeCount = 0;\r | |
| 1430 | \r | |
| 1431 | SmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);\r | |
| 1432 | ASSERT (SmramRanges != NULL);\r | |
| 1433 | Status = mSmmAccess->GetCapabilities (mSmmAccess, &Size, SmramRanges);\r | |
| 1434 | ASSERT_EFI_ERROR (Status);\r | |
| 1435 | \r | |
| 1436 | do {\r | |
| 1437 | Rescan = FALSE;\r | |
| 1438 | for (Index = 0; (Index < SmramRangeCount) && !Rescan; Index++) {\r | |
| 1439 | //\r | |
| 1440 | // Skip zero size entry.\r | |
| 1441 | //\r | |
| 1442 | if (SmramRanges[Index].PhysicalSize != 0) {\r | |
| 1443 | for (Index2 = 0; (Index2 < SmramReservedCount) && !Rescan; Index2++) {\r | |
| 1444 | //\r | |
| 1445 | // Skip zero size entry.\r | |
| 1446 | //\r | |
| 1447 | if (SmramReservedRanges[Index2].SmramReservedSize != 0) {\r | |
| 1448 | if (SmmIsSmramOverlap (\r | |
| 1449 | &SmramRanges[Index],\r | |
| 1450 | &SmramReservedRanges[Index2]\r | |
| 1451 | )) {\r | |
| 1452 | //\r | |
| 1453 | // There is overlap, need to split entry and then rescan.\r | |
| 1454 | //\r | |
| 1455 | SmmSplitSmramEntry (\r | |
| 1456 | &SmramRanges[Index],\r | |
| 1457 | &SmramReservedRanges[Index2],\r | |
| 1458 | SmramRanges,\r | |
| 1459 | &SmramRangeCount,\r | |
| 1460 | SmramReservedRanges,\r | |
| 1461 | &SmramReservedCount,\r | |
| 1462 | TempSmramRanges,\r | |
| 1463 | &TempSmramRangeCount\r | |
| 1464 | );\r | |
| 1465 | Rescan = TRUE;\r | |
| 1466 | }\r | |
| 1467 | }\r | |
| 1468 | }\r | |
| 1469 | if (!Rescan) {\r | |
| 1470 | //\r | |
| 1471 | // No any overlap, copy the entry to the temp SMRAM ranges.\r | |
| 1472 | // Zero SmramRanges[Index].PhysicalSize = 0;\r | |
| 1473 | //\r | |
| 1474 | CopyMem (&TempSmramRanges[TempSmramRangeCount++], &SmramRanges[Index], sizeof (EFI_SMRAM_DESCRIPTOR));\r | |
| 1475 | SmramRanges[Index].PhysicalSize = 0;\r | |
| 1476 | }\r | |
| 1477 | }\r | |
| 1478 | }\r | |
| 1479 | } while (Rescan);\r | |
| 1480 | ASSERT (TempSmramRangeCount <= MaxCount);\r | |
| 1481 | \r | |
| 1482 | //\r | |
| a7d10bb0 | 1483 | // Sort the entries\r |
| c03beb76 | 1484 | //\r |
| a7d10bb0 | 1485 | FullSmramRanges = AllocateZeroPool ((TempSmramRangeCount + AdditionSmramRangeCount) * sizeof (EFI_SMRAM_DESCRIPTOR));\r |
| c03beb76 SZ |
1486 | ASSERT (FullSmramRanges != NULL);\r |
| 1487 | *FullSmramRangeCount = 0;\r | |
| 1488 | do {\r | |
| 1489 | for (Index = 0; Index < TempSmramRangeCount; Index++) {\r | |
| 1490 | if (TempSmramRanges[Index].PhysicalSize != 0) {\r | |
| 1491 | break;\r | |
| 1492 | }\r | |
| 1493 | }\r | |
| 1494 | ASSERT (Index < TempSmramRangeCount);\r | |
| 1495 | for (Index2 = 0; Index2 < TempSmramRangeCount; Index2++) {\r | |
| 1496 | if ((Index2 != Index) && (TempSmramRanges[Index2].PhysicalSize != 0) && (TempSmramRanges[Index2].CpuStart < TempSmramRanges[Index].CpuStart)) {\r | |
| 1497 | Index = Index2;\r | |
| 1498 | }\r | |
| 1499 | }\r | |
| 1500 | CopyMem (&FullSmramRanges[*FullSmramRangeCount], &TempSmramRanges[Index], sizeof (EFI_SMRAM_DESCRIPTOR));\r | |
| 1501 | *FullSmramRangeCount += 1;\r | |
| 1502 | TempSmramRanges[Index].PhysicalSize = 0;\r | |
| 1503 | } while (*FullSmramRangeCount < TempSmramRangeCount);\r | |
| 1504 | ASSERT (*FullSmramRangeCount == TempSmramRangeCount);\r | |
| a7d10bb0 | 1505 | *FullSmramRangeCount += AdditionSmramRangeCount;\r |
| c03beb76 SZ |
1506 | \r |
| 1507 | FreePool (SmramRanges);\r | |
| 1508 | FreePool (SmramReservedRanges);\r | |
| 1509 | FreePool (TempSmramRanges);\r | |
| 1510 | \r | |
| 1511 | return FullSmramRanges;\r | |
| e42e9404 | 1512 | }\r |
| 1513 | \r | |
| 1514 | /**\r | |
| 1515 | The Entry Point for SMM IPL\r | |
| 1516 | \r | |
| 1517 | Load SMM Core into SMRAM, register SMM Core entry point for SMIs, install \r | |
| 1518 | SMM Base 2 Protocol and SMM Communication Protocol, and register for the \r | |
| 1519 | critical events required to coordinate between DXE and SMM environments.\r | |
| 1520 | \r | |
| 1521 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
| 1522 | @param SystemTable A pointer to the EFI System Table.\r | |
| 1523 | \r | |
| 1524 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
| 1525 | @retval Other Some error occurred when executing this entry point.\r | |
| 1526 | \r | |
| 1527 | **/\r | |
| 1528 | EFI_STATUS\r | |
| 1529 | EFIAPI\r | |
| 1530 | SmmIplEntry (\r | |
| 1531 | IN EFI_HANDLE ImageHandle,\r | |
| 1532 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 1533 | )\r | |
| 1534 | {\r | |
| 1535 | EFI_STATUS Status;\r | |
| e42e9404 | 1536 | UINTN Index;\r |
| e42e9404 | 1537 | UINT64 MaxSize;\r |
| 1538 | VOID *Registration;\r | |
| 07d9dc83 | 1539 | UINT64 SmmCodeSize;\r |
| 07d9dc83 | 1540 | EFI_CPU_ARCH_PROTOCOL *CpuArch;\r |
| b07ea4c1 | 1541 | EFI_STATUS SetAttrStatus;\r |
| a7d10bb0 | 1542 | EFI_SMRAM_DESCRIPTOR *SmramRangeSmmDriver;\r |
| e42e9404 | 1543 | \r |
| 1544 | //\r | |
| 1545 | // Fill in the image handle of the SMM IPL so the SMM Core can use this as the \r | |
| 1546 | // ParentImageHandle field of the Load Image Protocol for all SMM Drivers loaded \r | |
| 1547 | // by the SMM Core\r | |
| 1548 | //\r | |
| 1549 | mSmmCorePrivateData.SmmIplImageHandle = ImageHandle;\r | |
| 1550 | \r | |
| 1551 | //\r | |
| 1552 | // Get SMM Access Protocol\r | |
| 1553 | //\r | |
| 1554 | Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&mSmmAccess);\r | |
| 1555 | ASSERT_EFI_ERROR (Status);\r | |
| 1556 | \r | |
| 1557 | //\r | |
| 1558 | // Get SMM Control2 Protocol\r | |
| 1559 | //\r | |
| 1560 | Status = gBS->LocateProtocol (&gEfiSmmControl2ProtocolGuid, NULL, (VOID **)&mSmmControl2);\r | |
| 1561 | ASSERT_EFI_ERROR (Status);\r | |
| 1562 | \r | |
| c03beb76 | 1563 | gSmmCorePrivate->SmramRanges = GetFullSmramRanges (&gSmmCorePrivate->SmramRangeCount);\r |
| 84edd20b | 1564 | \r |
| e42e9404 | 1565 | //\r |
| 1566 | // Open all SMRAM ranges\r | |
| 1567 | //\r | |
| 1568 | Status = mSmmAccess->Open (mSmmAccess);\r | |
| 1569 | ASSERT_EFI_ERROR (Status);\r | |
| 1570 | \r | |
| 1571 | //\r | |
| 1572 | // Print debug message that the SMRAM window is now open.\r | |
| 1573 | //\r | |
| 1574 | DEBUG ((DEBUG_INFO, "SMM IPL opened SMRAM window\n"));\r | |
| e42e9404 | 1575 | \r |
| 1576 | //\r | |
| 06b07ce3 | 1577 | // Find the largest SMRAM range between 1MB and 4GB that is at least 256KB - 4K in size\r |
| e42e9404 | 1578 | //\r |
| 1579 | mCurrentSmramRange = NULL;\r | |
| 06b07ce3 | 1580 | for (Index = 0, MaxSize = SIZE_256KB - EFI_PAGE_SIZE; Index < gSmmCorePrivate->SmramRangeCount; Index++) {\r |
| 2c0f06f0 | 1581 | //\r |
| 1582 | // Skip any SMRAM region that is already allocated, needs testing, or needs ECC initialization\r | |
| 1583 | //\r | |
| 1584 | if ((gSmmCorePrivate->SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) != 0) {\r | |
| 1585 | continue;\r | |
| 1586 | }\r | |
| 1587 | \r | |
| e42e9404 | 1588 | if (gSmmCorePrivate->SmramRanges[Index].CpuStart >= BASE_1MB) {\r |
| 10e4e4f6 | 1589 | if ((gSmmCorePrivate->SmramRanges[Index].CpuStart + gSmmCorePrivate->SmramRanges[Index].PhysicalSize - 1) <= MAX_ADDRESS) {\r |
| e42e9404 | 1590 | if (gSmmCorePrivate->SmramRanges[Index].PhysicalSize >= MaxSize) {\r |
| 1591 | MaxSize = gSmmCorePrivate->SmramRanges[Index].PhysicalSize;\r | |
| 1592 | mCurrentSmramRange = &gSmmCorePrivate->SmramRanges[Index];\r | |
| 1593 | }\r | |
| 1594 | }\r | |
| 1595 | }\r | |
| 1596 | }\r | |
| 1597 | \r | |
| 1598 | if (mCurrentSmramRange != NULL) {\r | |
| 1599 | //\r | |
| 1600 | // Print debug message showing SMRAM window that will be used by SMM IPL and SMM Core\r | |
| 1601 | //\r | |
| 1602 | DEBUG ((DEBUG_INFO, "SMM IPL found SMRAM window %p - %p\n", \r | |
| 1603 | (VOID *)(UINTN)mCurrentSmramRange->CpuStart, \r | |
| 1604 | (VOID *)(UINTN)(mCurrentSmramRange->CpuStart + mCurrentSmramRange->PhysicalSize - 1)\r | |
| 1605 | ));\r | |
| 1606 | \r | |
| 40e8cca5 | 1607 | GetSmramCacheRange (mCurrentSmramRange, &mSmramCacheBase, &mSmramCacheSize);\r |
| e42e9404 | 1608 | //\r |
| 07d9dc83 | 1609 | // If CPU AP is present, attempt to set SMRAM cacheability to WB\r |
| 1610 | // Note that it is expected that cacheability of SMRAM has been set to WB if CPU AP\r | |
| 1611 | // is not available here.\r | |
| e42e9404 | 1612 | //\r |
| 0a6c0905 | 1613 | CpuArch = NULL;\r |
| 07d9dc83 | 1614 | Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&CpuArch);\r |
| 1615 | if (!EFI_ERROR (Status)) {\r | |
| 1616 | Status = gDS->SetMemorySpaceAttributes(\r | |
| 1617 | mSmramCacheBase, \r | |
| 1618 | mSmramCacheSize,\r | |
| 1619 | EFI_MEMORY_WB\r | |
| 1620 | );\r | |
| 1621 | if (EFI_ERROR (Status)) {\r | |
| 1622 | DEBUG ((DEBUG_WARN, "SMM IPL failed to set SMRAM window to EFI_MEMORY_WB\n"));\r | |
| 1623 | } \r | |
| 1624 | }\r | |
| 3c447c27 | 1625 | //\r |
| 1626 | // if Loading module at Fixed Address feature is enabled, save the SMRAM base to Load\r | |
| 1627 | // Modules At Fixed Address Configuration Table.\r | |
| 1628 | //\r | |
| 1629 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
| 1630 | //\r | |
| 1631 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
| 1632 | //\r | |
| 1633 | SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);\r | |
| 1634 | //\r | |
| 1635 | // The SMRAM available memory is assumed to be larger than SmmCodeSize\r | |
| 1636 | //\r | |
| 1637 | ASSERT (mCurrentSmramRange->PhysicalSize > SmmCodeSize);\r | |
| 1638 | //\r | |
| 1639 | // Retrieve Load modules At fixed address configuration table and save the SMRAM base.\r | |
| 1640 | //\r | |
| 1641 | Status = EfiGetSystemConfigurationTable (\r | |
| 1642 | &gLoadFixedAddressConfigurationTableGuid,\r | |
| c2aeb66f | 1643 | (VOID **) &mLMFAConfigurationTable\r |
| 3c447c27 | 1644 | );\r |
| c2aeb66f LG |
1645 | if (!EFI_ERROR (Status) && mLMFAConfigurationTable != NULL) {\r |
| 1646 | mLMFAConfigurationTable->SmramBase = mCurrentSmramRange->CpuStart;\r | |
| 2d5ac154 | 1647 | //\r |
| 1648 | // Print the SMRAM base\r | |
| 1649 | //\r | |
| c2aeb66f | 1650 | DEBUG ((EFI_D_INFO, "LOADING MODULE FIXED INFO: TSEG BASE is %x. \n", mLMFAConfigurationTable->SmramBase));\r |
| 3c447c27 | 1651 | }\r |
| a7d10bb0 LG |
1652 | \r |
| 1653 | //\r | |
| 1654 | // Fill the Smram range for all SMM code\r | |
| 1655 | //\r | |
| 1656 | SmramRangeSmmDriver = &gSmmCorePrivate->SmramRanges[gSmmCorePrivate->SmramRangeCount - 2];\r | |
| 1657 | SmramRangeSmmDriver->CpuStart = mCurrentSmramRange->CpuStart;\r | |
| 1658 | SmramRangeSmmDriver->PhysicalStart = mCurrentSmramRange->PhysicalStart;\r | |
| 1659 | SmramRangeSmmDriver->RegionState = mCurrentSmramRange->RegionState | EFI_ALLOCATED;\r | |
| 1660 | SmramRangeSmmDriver->PhysicalSize = SmmCodeSize;\r | |
| 1661 | \r | |
| 1662 | mCurrentSmramRange->PhysicalSize -= SmmCodeSize;\r | |
| 1663 | mCurrentSmramRange->CpuStart = mCurrentSmramRange->CpuStart + SmmCodeSize;\r | |
| 1664 | mCurrentSmramRange->PhysicalStart = mCurrentSmramRange->PhysicalStart + SmmCodeSize;\r | |
| 3c447c27 | 1665 | }\r |
| e42e9404 | 1666 | //\r |
| 1667 | // Load SMM Core into SMRAM and execute it from SMRAM\r | |
| 1668 | //\r | |
| c03beb76 SZ |
1669 | Status = ExecuteSmmCoreFromSmram (\r |
| 1670 | mCurrentSmramRange,\r | |
| 1671 | &gSmmCorePrivate->SmramRanges[gSmmCorePrivate->SmramRangeCount - 1],\r | |
| 1672 | gSmmCorePrivate\r | |
| 1673 | );\r | |
| e42e9404 | 1674 | if (EFI_ERROR (Status)) {\r |
| 1675 | //\r | |
| 1676 | // Print error message that the SMM Core failed to be loaded and executed.\r | |
| 1677 | //\r | |
| 1678 | DEBUG ((DEBUG_ERROR, "SMM IPL could not load and execute SMM Core from SMRAM\n"));\r | |
| 1679 | \r | |
| 1680 | //\r | |
| 1681 | // Attempt to reset SMRAM cacheability to UC\r | |
| 1682 | //\r | |
| 0a6c0905 | 1683 | if (CpuArch != NULL) {\r |
| b07ea4c1 LE |
1684 | SetAttrStatus = gDS->SetMemorySpaceAttributes(\r |
| 1685 | mSmramCacheBase, \r | |
| 1686 | mSmramCacheSize,\r | |
| 1687 | EFI_MEMORY_UC\r | |
| 1688 | );\r | |
| 1689 | if (EFI_ERROR (SetAttrStatus)) {\r | |
| 0a6c0905 | 1690 | DEBUG ((DEBUG_WARN, "SMM IPL failed to reset SMRAM window to EFI_MEMORY_UC\n"));\r |
| 1691 | } \r | |
| 1692 | }\r | |
| e42e9404 | 1693 | }\r |
| 1694 | } else {\r | |
| 1695 | //\r | |
| 1696 | // Print error message that there are not enough SMRAM resources to load the SMM Core.\r | |
| 1697 | //\r | |
| 1698 | DEBUG ((DEBUG_ERROR, "SMM IPL could not find a large enough SMRAM region to load SMM Core\n"));\r | |
| 1699 | }\r | |
| 1700 | \r | |
| 1701 | //\r | |
| 1702 | // If the SMM Core could not be loaded then close SMRAM window, free allocated \r | |
| 1703 | // resources, and return an error so SMM IPL will be unloaded.\r | |
| 1704 | //\r | |
| 1705 | if (mCurrentSmramRange == NULL || EFI_ERROR (Status)) {\r | |
| 1706 | //\r | |
| 1707 | // Close all SMRAM ranges\r | |
| 1708 | //\r | |
| 1709 | Status = mSmmAccess->Close (mSmmAccess);\r | |
| 1710 | ASSERT_EFI_ERROR (Status);\r | |
| 1711 | \r | |
| 1712 | //\r | |
| 1713 | // Print debug message that the SMRAM window is now closed.\r | |
| 1714 | //\r | |
| 1715 | DEBUG ((DEBUG_INFO, "SMM IPL closed SMRAM window\n"));\r | |
| 1716 | \r | |
| 1717 | //\r | |
| 1718 | // Free all allocated resources\r | |
| 1719 | //\r | |
| 1720 | FreePool (gSmmCorePrivate->SmramRanges);\r | |
| 63aa86b0 | 1721 | \r |
| e42e9404 | 1722 | return EFI_UNSUPPORTED;\r |
| 1723 | }\r | |
| 1724 | \r | |
| 1725 | //\r | |
| 1726 | // Install SMM Base2 Protocol and SMM Communication Protocol\r | |
| 1727 | //\r | |
| 1728 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
| 1729 | &mSmmIplHandle,\r | |
| 1730 | &gEfiSmmBase2ProtocolGuid, &mSmmBase2,\r | |
| 1731 | &gEfiSmmCommunicationProtocolGuid, &mSmmCommunication,\r | |
| 1732 | NULL\r | |
| 1733 | );\r | |
| 1734 | ASSERT_EFI_ERROR (Status);\r | |
| 1735 | \r | |
| 1736 | //\r | |
| 1737 | // Create the set of protocol and event notififcations that the SMM IPL requires\r | |
| 1738 | //\r | |
| 1739 | for (Index = 0; mSmmIplEvents[Index].NotifyFunction != NULL; Index++) {\r | |
| 1740 | if (mSmmIplEvents[Index].Protocol) {\r | |
| 1741 | mSmmIplEvents[Index].Event = EfiCreateProtocolNotifyEvent (\r | |
| 1742 | mSmmIplEvents[Index].Guid,\r | |
| 5657b268 | 1743 | mSmmIplEvents[Index].NotifyTpl,\r |
| e42e9404 | 1744 | mSmmIplEvents[Index].NotifyFunction,\r |
| 1745 | mSmmIplEvents[Index].NotifyContext,\r | |
| 1746 | &Registration\r | |
| 1747 | );\r | |
| 1748 | } else {\r | |
| 1749 | Status = gBS->CreateEventEx (\r | |
| 1750 | EVT_NOTIFY_SIGNAL,\r | |
| 5657b268 | 1751 | mSmmIplEvents[Index].NotifyTpl,\r |
| e42e9404 | 1752 | mSmmIplEvents[Index].NotifyFunction,\r |
| 1753 | mSmmIplEvents[Index].NotifyContext,\r | |
| 1754 | mSmmIplEvents[Index].Guid,\r | |
| 1755 | &mSmmIplEvents[Index].Event\r | |
| 1756 | );\r | |
| 1757 | ASSERT_EFI_ERROR (Status);\r | |
| 1758 | }\r | |
| 1759 | }\r | |
| 1760 | \r | |
| 1761 | return EFI_SUCCESS;\r | |
| 1762 | }\r |