/** @file Functions to deal with Mem buffer Copyright (c) 2005 - 2011, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/ #include "HexEditor.h" extern EFI_HANDLE HImageHandleBackup; extern HEFI_EDITOR_BUFFER_IMAGE HBufferImage; extern BOOLEAN HBufferImageNeedRefresh; extern BOOLEAN HBufferImageOnlyLineNeedRefresh; extern BOOLEAN HBufferImageMouseNeedRefresh; extern HEFI_EDITOR_GLOBAL_EDITOR HMainEditor; HEFI_EDITOR_MEM_IMAGE HMemImage; HEFI_EDITOR_MEM_IMAGE HMemImageBackupVar; EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL DummyPciRootBridgeIo; // // for basic initialization of HDiskImage // HEFI_EDITOR_MEM_IMAGE HMemImageConst = { NULL, 0, 0 }; EFI_STATUS DummyMemRead ( IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL * This, IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer ); EFI_STATUS DummyMemWrite ( IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL * This, IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer ); EFI_STATUS HMemImageInit ( VOID ) /*++ Routine Description: Initialization function for HDiskImage Arguments: None Returns: EFI_SUCCESS EFI_LOAD_ERROR --*/ { EFI_STATUS Status; // // basically initialize the HMemImage // CopyMem (&HMemImage, &HMemImageConst, sizeof (HMemImage)); Status = gBS->LocateProtocol ( &gEfiPciRootBridgeIoProtocolGuid, NULL, (VOID**)&HMemImage.IoFncs ); if (Status == EFI_NOT_FOUND) { // // For NT32, no EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL is available // Use Dummy PciRootBridgeIo for memory access // ZeroMem (&DummyPciRootBridgeIo, sizeof (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL)); DummyPciRootBridgeIo.Mem.Read = DummyMemRead; DummyPciRootBridgeIo.Mem.Write = DummyMemWrite; HMemImage.IoFncs = &DummyPciRootBridgeIo; Status = EFI_SUCCESS; } if (!EFI_ERROR (Status)) { return EFI_SUCCESS; } else { return EFI_LOAD_ERROR; } } EFI_STATUS HMemImageBackup ( VOID ) /*++ Routine Description: Backup function for HDiskImage Only a few fields need to be backup. This is for making the Disk buffer refresh as few as possible. Arguments: None Returns: EFI_SUCCESS --*/ { HMemImageBackupVar.Offset = HMemImage.Offset; HMemImageBackupVar.Size = HMemImage.Size; return EFI_SUCCESS; } EFI_STATUS HMemImageCleanup ( VOID ) /*++ Routine Description: Cleanup function for HDiskImage Arguments: None Returns: EFI_SUCCESS --*/ { return EFI_SUCCESS; } EFI_STATUS HMemImageSetMemOffsetSize ( IN UINTN Offset, IN UINTN Size ) /*++ Routine Description: Set FileName field in HFileImage Arguments: Offset - The offset Size - The size Returns: EFI_SUCCESS EFI_OUT_OF_RESOURCES --*/ { HMemImage.Offset = Offset; HMemImage.Size = Size; return EFI_SUCCESS; } EFI_STATUS HMemImageRead ( IN UINTN Offset, IN UINTN Size, BOOLEAN Recover ) /*++ Routine Description: Read a disk from disk into HBufferImage Arguments: Offset - The offset Size - The size Recover - if is for recover, no information print Returns: EFI_SUCCESS EFI_LOAD_ERROR EFI_OUT_OF_RESOURCES --*/ { EFI_STATUS Status; void *Buffer; CHAR16 *Str; HEFI_EDITOR_LINE *Line; EDIT_FILE_TYPE BufferTypeBackup; BufferTypeBackup = HBufferImage.BufferType; HBufferImage.BufferType = FileTypeMemBuffer; Buffer = AllocateZeroPool (Size); if (Buffer == NULL) { StatusBarSetStatusString (L"Read Memory Failed"); return EFI_OUT_OF_RESOURCES; } Status = HMemImage.IoFncs->Mem.Read ( HMemImage.IoFncs, EfiPciWidthUint8, Offset, Size, Buffer ); if (EFI_ERROR (Status)) { FreePool (Buffer); StatusBarSetStatusString (L"Memory Specified Not Accessible"); return EFI_LOAD_ERROR; } HBufferImageFree (); Status = HBufferImageBufferToList (Buffer, Size); FreePool (Buffer); if (EFI_ERROR (Status)) { StatusBarSetStatusString (L"Read Memory Failed"); return Status; } Status = HMemImageSetMemOffsetSize (Offset, Size); HBufferImage.DisplayPosition.Row = 2; HBufferImage.DisplayPosition.Column = 10; HBufferImage.MousePosition.Row = 2; HBufferImage.MousePosition.Column = 10; HBufferImage.LowVisibleRow = 1; HBufferImage.HighBits = TRUE; HBufferImage.BufferPosition.Row = 1; HBufferImage.BufferPosition.Column = 1; if (!Recover) { Str = CatSPrint(NULL, L"%d Lines Read", HBufferImage.NumLines); if (Str == NULL) { StatusBarSetStatusString (L"Read Memory Failed"); return EFI_OUT_OF_RESOURCES; } StatusBarSetStatusString (Str); SHELL_FREE_NON_NULL (Str); HMainEditor.SelectStart = 0; HMainEditor.SelectEnd = 0; } // // has line // if (HBufferImage.Lines != NULL) { HBufferImage.CurrentLine = CR (HBufferImage.ListHead->ForwardLink, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST); } else { // // create a dummy line // Line = HBufferImageCreateLine (); if (Line == NULL) { StatusBarSetStatusString (L"Read Memory Failed"); return EFI_OUT_OF_RESOURCES; } HBufferImage.CurrentLine = Line; } HBufferImage.Modified = FALSE; HBufferImageNeedRefresh = TRUE; HBufferImageOnlyLineNeedRefresh = FALSE; HBufferImageMouseNeedRefresh = TRUE; return EFI_SUCCESS; } EFI_STATUS HMemImageSave ( IN UINTN Offset, IN UINTN Size ) /*++ Routine Description: Save lines in HBufferImage to disk Arguments: Offset - The offset Size - The size Returns: EFI_SUCCESS EFI_LOAD_ERROR EFI_OUT_OF_RESOURCES --*/ { EFI_STATUS Status; VOID *Buffer; EDIT_FILE_TYPE BufferTypeBackup; // // not modified, so directly return // if (HBufferImage.Modified == FALSE) { return EFI_SUCCESS; } BufferTypeBackup = HBufferImage.BufferType; HBufferImage.BufferType = FileTypeMemBuffer; Buffer = AllocateZeroPool (Size); if (Buffer == NULL) { return EFI_OUT_OF_RESOURCES; } Status = HBufferImageListToBuffer (Buffer, Size); if (EFI_ERROR (Status)) { FreePool (Buffer); return Status; } // // write back to memory // Status = HMemImage.IoFncs->Mem.Write ( HMemImage.IoFncs, EfiPciWidthUint8, Offset, Size, Buffer ); FreePool (Buffer); if (EFI_ERROR (Status)) { return EFI_LOAD_ERROR; } // // now not modified // HBufferImage.Modified = FALSE; return EFI_SUCCESS; } EFI_STATUS DummyMemRead ( IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL * This, IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer ) { return EFI_UNSUPPORTED; } EFI_STATUS DummyMemWrite ( IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL * This, IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer ) { return EFI_UNSUPPORTED; }