--- /dev/null
+/** @file\r
+ C funtions in SEC\r
+\r
+Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+\r
+#include "SecMain.h"\r
+\r
+EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI gSecTemporaryRamSupportPpi = {\r
+ SecTemporaryRamSupport\r
+};\r
+\r
+EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {\r
+ {\r
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
+ &gEfiTemporaryRamSupportPpiGuid,\r
+ &gSecTemporaryRamSupportPpi\r
+ }\r
+};\r
+\r
+//\r
+// These are IDT entries pointing to 10:FFFFFFE4h.\r
+//\r
+UINT64 mIdtEntryTemplate = 0xffff8e000010ffe4ULL;\r
+\r
+/**\r
+ Caller provided function to be invoked at the end of InitializeDebugAgent().\r
+\r
+ Entry point to the C language phase of SEC. After the SEC assembly\r
+ code has initialized some temporary memory and set up the stack,\r
+ the control is transferred to this function.\r
+\r
+ @param[in] Context The first input parameter of InitializeDebugAgent().\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+SecStartupPhase2(\r
+ IN VOID *Context\r
+ );\r
+\r
+\r
+/**\r
+\r
+ Entry point to the C language phase of SEC. After the SEC assembly\r
+ code has initialized some temporary memory and set up the stack,\r
+ the control is transferred to this function.\r
+\r
+\r
+ @param SizeOfRam Size of the temporary memory available for use.\r
+ @param TempRamBase Base address of tempory ram\r
+ @param BootFirmwareVolume Base address of the Boot Firmware Volume.\r
+**/\r
+VOID\r
+EFIAPI\r
+SecStartup (\r
+ IN UINT32 SizeOfRam,\r
+ IN UINT32 TempRamBase,\r
+ IN VOID *BootFirmwareVolume\r
+ )\r
+{\r
+ EFI_SEC_PEI_HAND_OFF SecCoreData;\r
+ IA32_DESCRIPTOR IdtDescriptor;\r
+ SEC_IDT_TABLE IdtTableInStack;\r
+ UINT32 Index;\r
+ UINT32 PeiStackSize;\r
+\r
+ PeiStackSize = (SizeOfRam >> 1);\r
+\r
+ ASSERT (PeiStackSize < SizeOfRam);\r
+\r
+ //\r
+ // Process all libraries constructor function linked to SecCore.\r
+ //\r
+ ProcessLibraryConstructorList ();\r
+\r
+ //\r
+ // Initialize floating point operating environment\r
+ // to be compliant with UEFI spec.\r
+ //\r
+ InitializeFloatingPointUnits ();\r
+\r
+\r
+ // |-------------------|---->\r
+ // |Idt Table |\r
+ // |-------------------|\r
+ // |PeiService Pointer | PeiStackSize\r
+ // |-------------------|\r
+ // | |\r
+ // | Stack |\r
+ // |-------------------|---->\r
+ // | |\r
+ // | |\r
+ // | Heap | PeiTemporayRamSize\r
+ // | |\r
+ // | |\r
+ // |-------------------|----> TempRamBase\r
+\r
+ IdtTableInStack.PeiService = 0;\r
+ for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {\r
+ CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&mIdtEntryTemplate, sizeof (UINT64));\r
+ }\r
+\r
+ IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;\r
+ IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);\r
+\r
+ AsmWriteIdtr (&IdtDescriptor);\r
+\r
+ //\r
+ // Update the base address and length of Pei temporary memory\r
+ //\r
+ SecCoreData.DataSize = (UINT16) sizeof (EFI_SEC_PEI_HAND_OFF);\r
+ SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;\r
+ SecCoreData.BootFirmwareVolumeSize = (UINTN)(0x100000000ULL - (UINTN) BootFirmwareVolume);\r
+ SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;\r
+ SecCoreData.TemporaryRamSize = SizeOfRam;\r
+ SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;\r
+ SecCoreData.PeiTemporaryRamSize = SizeOfRam - PeiStackSize;\r
+ SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);\r
+ SecCoreData.StackSize = PeiStackSize;\r
+\r
+ //\r
+ // Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.\r
+ //\r
+ InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);\r
+\r
+}\r
+\r
+/**\r
+ Caller provided function to be invoked at the end of InitializeDebugAgent().\r
+\r
+ Entry point to the C language phase of SEC. After the SEC assembly\r
+ code has initialized some temporary memory and set up the stack,\r
+ the control is transferred to this function.\r
+\r
+ @param[in] Context The first input parameter of InitializeDebugAgent().\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+SecStartupPhase2(\r
+ IN VOID *Context\r
+ )\r
+{\r
+ EFI_SEC_PEI_HAND_OFF *SecCoreData;\r
+ EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;\r
+\r
+ SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;\r
+ //\r
+ // Find Pei Core entry point. It will report SEC and Pei Core debug information if remote debug\r
+ // is enabled.\r
+ //\r
+ FindAndReportEntryPoints ((EFI_FIRMWARE_VOLUME_HEADER *) SecCoreData->BootFirmwareVolumeBase, &PeiCoreEntryPoint);\r
+ if (PeiCoreEntryPoint == NULL)\r
+ {\r
+ CpuDeadLoop ();\r
+ }\r
+\r
+ //\r
+ // Transfer the control to the PEI core\r
+ //\r
+ ASSERT (PeiCoreEntryPoint != NULL);\r
+ (*PeiCoreEntryPoint) (SecCoreData, (EFI_PEI_PPI_DESCRIPTOR *)&mPeiSecPlatformInformationPpi);\r
+\r
+ //\r
+ // Should not come here.\r
+ //\r
+ return ;\r
+}\r
+\r
+/**\r
+ This service of the TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into\r
+ permanent memory.\r
+\r
+ @param PeiServices Pointer to the PEI Services Table.\r
+ @param TemporaryMemoryBase Source Address in temporary memory from which the SEC or PEIM will copy the\r
+ Temporary RAM contents.\r
+ @param PermanentMemoryBase Destination Address in permanent memory into which the SEC or PEIM will copy the\r
+ Temporary RAM contents.\r
+ @param CopySize Amount of memory to migrate from temporary to permanent memory.\r
+\r
+ @retval EFI_SUCCESS The data was successfully returned.\r
+ @retval EFI_INVALID_PARAMETER PermanentMemoryBase + CopySize > TemporaryMemoryBase when\r
+ TemporaryMemoryBase > PermanentMemoryBase.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+SecTemporaryRamSupport (\r
+ IN CONST EFI_PEI_SERVICES **PeiServices,\r
+ IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,\r
+ IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,\r
+ IN UINTN CopySize\r
+ )\r
+{\r
+ IA32_DESCRIPTOR IdtDescriptor;\r
+ VOID* OldHeap;\r
+ VOID* NewHeap;\r
+ VOID* OldStack;\r
+ VOID* NewStack;\r
+ DEBUG_AGENT_CONTEXT_POSTMEM_SEC DebugAgentContext;\r
+ BOOLEAN OldStatus;\r
+ UINTN PeiStackSize;\r
+\r
+ PeiStackSize = (CopySize >> 1);\r
+\r
+ ASSERT (PeiStackSize < CopySize);\r
+\r
+ //\r
+ // |-------------------|---->\r
+ // | Stack | PeiStackSize\r
+ // |-------------------|---->\r
+ // | Heap | PeiTemporayRamSize\r
+ // |-------------------|----> TempRamBase\r
+ //\r
+ // |-------------------|---->\r
+ // | Heap | PeiTemporayRamSize\r
+ // |-------------------|---->\r
+ // | Stack | PeiStackSize\r
+ // |-------------------|----> PermanentMemoryBase\r
+ //\r
+\r
+ OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r
+ NewHeap = (VOID*)((UINTN)PermanentMemoryBase + PeiStackSize);\r
+ \r
+ OldStack = (VOID*)((UINTN)TemporaryMemoryBase + CopySize - PeiStackSize);\r
+ NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r
+\r
+ DebugAgentContext.HeapMigrateOffset = (UINTN)NewHeap - (UINTN)OldHeap;\r
+ DebugAgentContext.StackMigrateOffset = (UINTN)NewStack - (UINTN)OldStack;\r
+ \r
+ OldStatus = SaveAndSetDebugTimerInterrupt (FALSE);\r
+ //\r
+ // Initialize Debug Agent to support source level debug in PEI phase after memory ready.\r
+ // It will build HOB and fix up the pointer in IDT table.\r
+ //\r
+ InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, (VOID *) &DebugAgentContext, NULL);\r
+\r
+ //\r
+ // Migrate Heap\r
+ //\r
+ CopyMem (NewHeap, OldHeap, CopySize - PeiStackSize);\r
+\r
+ //\r
+ // Migrate Stack\r
+ //\r
+ CopyMem (NewStack, OldStack, PeiStackSize);\r
+\r
+\r
+ //\r
+ // We need *not* fix the return address because currently,\r
+ // The PeiCore is executed in flash.\r
+ //\r
+\r
+ //\r
+ // Rebase IDT table in permanent memory\r
+ //\r
+ AsmReadIdtr (&IdtDescriptor);\r
+ IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;\r
+\r
+ AsmWriteIdtr (&IdtDescriptor);\r
+\r
+\r
+ //\r
+ // Program MTRR\r
+ //\r
+\r
+ //\r
+ // SecSwitchStack function must be invoked after the memory migration\r
+ // immediatly, also we need fixup the stack change caused by new call into\r
+ // permenent memory.\r
+ //\r
+ SecSwitchStack (\r
+ (UINT32) (UINTN) OldStack,\r
+ (UINT32) (UINTN) NewStack\r
+ );\r
+\r
+ SaveAndSetDebugTimerInterrupt (OldStatus);\r
+ \r
+ return EFI_SUCCESS;\r
+}\r
+\r
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