--- /dev/null
+/** @file\r
+* Main file supporting the SEC Phase for Versatile Express\r
+*\r
+* Copyright (c) 2011, ARM Limited. All rights reserved.\r
+*\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
+#include <Uefi.h>\r
+#include <Library/BaseLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/DebugAgentLib.h>\r
+#include <Library/PcdLib.h>\r
+#include <Library/PeCoffExtraActionLib.h>\r
+#include <Library/PeCoffLib.h>\r
+\r
+#include <Pi/PiFirmwareFile.h>\r
+#include <Pi/PiFirmwareVolume.h>\r
+\r
+#define GET_OCCUPIED_SIZE(ActualSize, Alignment) \\r
+ (ActualSize) + (((Alignment) - ((ActualSize) & ((Alignment) - 1))) & ((Alignment) - 1))\r
+\r
+/**\r
+ Returns the highest bit set of the State field\r
+\r
+ @param ErasePolarity Erase Polarity as defined by EFI_FVB2_ERASE_POLARITY\r
+ in the Attributes field.\r
+ @param FfsHeader Pointer to FFS File Header\r
+\r
+\r
+ @retval the highest bit in the State field\r
+\r
+**/\r
+STATIC\r
+EFI_FFS_FILE_STATE\r
+GetFileState (\r
+ IN UINT8 ErasePolarity,\r
+ IN EFI_FFS_FILE_HEADER *FfsHeader\r
+ )\r
+{\r
+ EFI_FFS_FILE_STATE FileState;\r
+ EFI_FFS_FILE_STATE HighestBit;\r
+\r
+ FileState = FfsHeader->State;\r
+\r
+ if (ErasePolarity != 0) {\r
+ FileState = (EFI_FFS_FILE_STATE)~FileState;\r
+ }\r
+\r
+ HighestBit = 0x80;\r
+ while (HighestBit != 0 && (HighestBit & FileState) == 0) {\r
+ HighestBit >>= 1;\r
+ }\r
+\r
+ return HighestBit;\r
+}\r
+\r
+/**\r
+ Calculates the checksum of the header of a file.\r
+ The header is a zero byte checksum, so zero means header is good\r
+\r
+ @param FfsHeader Pointer to FFS File Header\r
+\r
+ @retval Checksum of the header\r
+\r
+**/\r
+STATIC\r
+UINT8\r
+CalculateHeaderChecksum (\r
+ IN EFI_FFS_FILE_HEADER *FileHeader\r
+ )\r
+{\r
+ UINT8 Sum;\r
+\r
+ // Calculate the sum of the header\r
+ Sum = CalculateSum8 ((CONST VOID*)FileHeader,sizeof(EFI_FFS_FILE_HEADER));\r
+\r
+ // State field (since this indicates the different state of file).\r
+ Sum = (UINT8)(Sum - FileHeader->State);\r
+\r
+ // Checksum field of the file is not part of the header checksum.\r
+ Sum = (UINT8)(Sum - FileHeader->IntegrityCheck.Checksum.File);\r
+\r
+ return Sum;\r
+}\r
+\r
+EFI_STATUS\r
+GetFfsFile (\r
+ IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,\r
+ IN EFI_FV_FILETYPE FileType,\r
+ OUT EFI_FFS_FILE_HEADER **FileHeader\r
+ )\r
+{\r
+ UINT64 FvLength;\r
+ UINTN FileOffset;\r
+ EFI_FFS_FILE_HEADER *FfsFileHeader;\r
+ UINT8 ErasePolarity;\r
+ UINT8 FileState;\r
+ UINT32 FileLength;\r
+ UINT32 FileOccupiedSize;\r
+\r
+ ASSERT (FwVolHeader->Signature == EFI_FVH_SIGNATURE);\r
+\r
+ FvLength = FwVolHeader->FvLength;\r
+ FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FwVolHeader + FwVolHeader->HeaderLength);\r
+ FileOffset = FwVolHeader->HeaderLength;\r
+\r
+ if (FwVolHeader->Attributes & EFI_FVB2_ERASE_POLARITY) {\r
+ ErasePolarity = 1;\r
+ } else {\r
+ ErasePolarity = 0;\r
+ }\r
+\r
+ while (FileOffset < (FvLength - sizeof (EFI_FFS_FILE_HEADER))) {\r
+ // Get FileState which is the highest bit of the State\r
+ FileState = GetFileState (ErasePolarity, FfsFileHeader);\r
+\r
+ switch (FileState) {\r
+\r
+ case EFI_FILE_HEADER_INVALID:\r
+ FileOffset += sizeof(EFI_FFS_FILE_HEADER);\r
+ FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + sizeof(EFI_FFS_FILE_HEADER));\r
+ break;\r
+\r
+ case EFI_FILE_DATA_VALID:\r
+ case EFI_FILE_MARKED_FOR_UPDATE:\r
+ if (CalculateHeaderChecksum (FfsFileHeader) != 0) {\r
+ ASSERT (FALSE);\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ if (FfsFileHeader->Type == FileType) {\r
+ *FileHeader = FfsFileHeader;\r
+ return EFI_SUCCESS;\r
+ }\r
+\r
+ FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;\r
+ FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);\r
+\r
+ FileOffset += FileOccupiedSize;\r
+ FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);\r
+ break;\r
+\r
+ case EFI_FILE_DELETED:\r
+ FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;\r
+ FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);\r
+ FileOffset += FileOccupiedSize;\r
+ FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);\r
+ break;\r
+\r
+ default:\r
+ return EFI_NOT_FOUND;\r
+ }\r
+ }\r
+ return EFI_NOT_FOUND;\r
+}\r
+\r
+EFI_STATUS\r
+GetImageContext (\r
+ IN EFI_FFS_FILE_HEADER *FfsHeader,\r
+ OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINTN ParsedLength;\r
+ UINTN SectionSize;\r
+ UINTN SectionLength;\r
+ EFI_COMMON_SECTION_HEADER *Section;\r
+ VOID *EfiImage;\r
+ UINTN ImageAddress;\r
+ EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;\r
+ VOID *CodeViewEntryPointer;\r
+\r
+ Section = (EFI_COMMON_SECTION_HEADER *)(FfsHeader + 1);\r
+ SectionSize = *(UINT32 *)(FfsHeader->Size) & 0x00FFFFFF;\r
+ SectionSize -= sizeof (EFI_FFS_FILE_HEADER);\r
+ ParsedLength = 0;\r
+ EfiImage = NULL;\r
+\r
+ while (ParsedLength < SectionSize) {\r
+ if ((Section->Type == EFI_SECTION_PE32) || (Section->Type == EFI_SECTION_TE)) {\r
+ EfiImage = (EFI_IMAGE_OPTIONAL_HEADER_UNION*)(Section + 1);\r
+ break;\r
+ }\r
+\r
+ //\r
+ // Size is 24 bits wide so mask upper 8 bits.\r
+ // SectionLength is adjusted it is 4 byte aligned.\r
+ // Go to the next section\r
+ //\r
+ SectionLength = *(UINT32 *)Section->Size & 0x00FFFFFF;\r
+ SectionLength = GET_OCCUPIED_SIZE (SectionLength, 4);\r
+ ASSERT (SectionLength != 0);\r
+ ParsedLength += SectionLength;\r
+ Section = (EFI_COMMON_SECTION_HEADER *)((UINT8 *)Section + SectionLength);\r
+ }\r
+\r
+ if (EfiImage == NULL) {\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ // Initialize the Image Context\r
+ ZeroMem (ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));\r
+ ImageContext->Handle = EfiImage;\r
+ ImageContext->ImageRead = PeCoffLoaderImageReadFromMemory;\r
+\r
+ Status = PeCoffLoaderGetImageInfo (ImageContext);\r
+ if (!EFI_ERROR(Status) && ((VOID*)ImageContext->DebugDirectoryEntryRva != NULL)) {\r
+ ImageAddress = ImageContext->ImageAddress;\r
+ if (ImageContext->IsTeImage) {\r
+ ImageAddress += sizeof (EFI_TE_IMAGE_HEADER) - ((EFI_TE_IMAGE_HEADER*)EfiImage)->StrippedSize;\r
+ }\r
+\r
+ DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY*)(ImageAddress + ImageContext->DebugDirectoryEntryRva);\r
+ if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {\r
+ CodeViewEntryPointer = (VOID *) (ImageAddress + (UINTN) DebugEntry->RVA);\r
+ switch (* (UINT32 *) CodeViewEntryPointer) {\r
+ case CODEVIEW_SIGNATURE_NB10:\r
+ ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY);\r
+ case CODEVIEW_SIGNATURE_RSDS:\r
+ ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY);\r
+ case CODEVIEW_SIGNATURE_MTOC:\r
+ ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY);\r
+ break;\r
+ default:\r
+ break;\r
+ }\r
+ }\r
+ }\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Initialize debug agent.\r
+\r
+ This function is used to set up debug environment to support source level debugging.\r
+ If certain Debug Agent Library instance has to save some private data in the stack,\r
+ this function must work on the mode that doesn't return to the caller, then\r
+ the caller needs to wrap up all rest of logic after InitializeDebugAgent() into one\r
+ function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is\r
+ responsible to invoke the passing-in function at the end of InitializeDebugAgent().\r
+\r
+ If the parameter Function is not NULL, Debug Agent Libary instance will invoke it by\r
+ passing in the Context to be its parameter.\r
+\r
+ If Function() is NULL, Debug Agent Library instance will return after setup debug\r
+ environment.\r
+\r
+ @param[in] InitFlag Init flag is used to decide the initialize process.\r
+ @param[in] Context Context needed according to InitFlag; it was optional.\r
+ @param[in] Function Continue function called by debug agent library; it was\r
+ optional.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+InitializeDebugAgent (\r
+ IN UINT32 InitFlag,\r
+ IN VOID *Context, OPTIONAL\r
+ IN DEBUG_AGENT_CONTINUE Function OPTIONAL\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_FFS_FILE_HEADER *FfsHeader;\r
+ PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r
+\r
+ // We use InitFlag to know if DebugAgent has been intialized from\r
+ // Sec (DEBUG_AGENT_INIT_PREMEM_SEC) or PrePi (DEBUG_AGENT_INIT_POSTMEM_SEC)\r
+ // modules\r
+ if (InitFlag == DEBUG_AGENT_INIT_PREMEM_SEC) {\r
+ //\r
+ // Get the PrePi or PrePeiCore module (defined as SEC type module)\r
+ //\r
+ Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdSecureFdBaseAddress), EFI_FV_FILETYPE_SECURITY_CORE, &FfsHeader);\r
+ if (!EFI_ERROR(Status)) {\r
+ Status = GetImageContext (FfsHeader,&ImageContext);\r
+ if (!EFI_ERROR(Status)) {\r
+ PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r
+ }\r
+ }\r
+ } else if (InitFlag == DEBUG_AGENT_INIT_POSTMEM_SEC) {\r
+ //\r
+ // Get the PrePi or PrePeiCore module (defined as SEC type module)\r
+ //\r
+ Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdNormalFvBaseAddress), EFI_FV_FILETYPE_SECURITY_CORE, &FfsHeader);\r
+ if (!EFI_ERROR(Status)) {\r
+ Status = GetImageContext (FfsHeader,&ImageContext);\r
+ if (!EFI_ERROR(Status)) {\r
+ PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r
+ }\r
+ }\r
+\r
+ //\r
+ // Get the PeiCore module (defined as PEI_CORE type module)\r
+ //\r
+ Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdNormalFvBaseAddress), EFI_FV_FILETYPE_PEI_CORE, &FfsHeader);\r
+ if (!EFI_ERROR(Status)) {\r
+ Status = GetImageContext (FfsHeader,&ImageContext);\r
+ if (!EFI_ERROR(Status)) {\r
+ PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+/**\r
+ Enable/Disable the interrupt of debug timer and return the interrupt state\r
+ prior to the operation.\r
+\r
+ If EnableStatus is TRUE, enable the interrupt of debug timer.\r
+ If EnableStatus is FALSE, disable the interrupt of debug timer.\r
+\r
+ @param[in] EnableStatus Enable/Disable.\r
+\r
+ @return FALSE always.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+SaveAndSetDebugTimerInterrupt (\r
+ IN BOOLEAN EnableStatus\r
+ )\r
+{\r
+ return FALSE;\r
+}\r
+\r
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