+++ /dev/null
-/*++\r
-\r
-Copyright (c) 2006, Intel Corporation \r
-All rights reserved. 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
-Module Name:\r
-\r
- BdsConsole.c\r
-\r
-Abstract:\r
-\r
- BDS Lib functions which contain all the code to connect console device\r
-\r
---*/\r
-\r
-BOOLEAN\r
-IsNvNeed (\r
- IN CHAR16 *ConVarName\r
- )\r
-{\r
- CHAR16 *Ptr;\r
- \r
- Ptr = ConVarName;\r
- \r
- //\r
- // If the variable includes "Dev" at last, we consider\r
- // it does not support NV attribute.\r
- //\r
- while (*Ptr) {\r
- Ptr++;\r
- }\r
- \r
- if ((*(Ptr - 3) == 'D') && (*(Ptr - 2) == 'e') && (*(Ptr - 1) == 'v')) {\r
- return FALSE;\r
- } else {\r
- return TRUE;\r
- }\r
-}\r
-\r
-EFI_STATUS\r
-BdsLibUpdateConsoleVariable (\r
- IN CHAR16 *ConVarName,\r
- IN EFI_DEVICE_PATH_PROTOCOL *CustomizedConDevicePath,\r
- IN EFI_DEVICE_PATH_PROTOCOL *ExclusiveDevicePath\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function update console variable based on ConVarName, it can \r
- add or remove one specific console device path from the variable\r
-\r
-Arguments:\r
-\r
- ConVarName - Console related variable name, ConIn, ConOut, ErrOut.\r
-\r
- CustomizedConDevicePath - The console device path which will be added to\r
- the console variable ConVarName, this parameter\r
- can not be multi-instance.\r
-\r
- ExclusiveDevicePath - The console device path which will be removed\r
- from the console variable ConVarName, this\r
- parameter can not be multi-instance.\r
-\r
-Returns:\r
-\r
- EFI_UNSUPPORTED - Add or remove the same device path.\r
- \r
- EFI_SUCCESS - Success add or remove the device path from \r
- the console variable.\r
-\r
---*/\r
-{\r
- EFI_STATUS Status;\r
- EFI_DEVICE_PATH_PROTOCOL *VarConsole;\r
- UINTN DevicePathSize;\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *TempNewDevicePath;\r
- UINT32 Attributes;\r
-\r
- VarConsole = NULL;\r
- DevicePathSize = 0;\r
- Status = EFI_UNSUPPORTED;\r
-\r
- //\r
- // Notes: check the device path point, here should check\r
- // with compare memory\r
- //\r
- if (CustomizedConDevicePath == ExclusiveDevicePath) {\r
- return EFI_UNSUPPORTED;\r
- }\r
- //\r
- // Delete the ExclusiveDevicePath from current default console\r
- //\r
- VarConsole = BdsLibGetVariableAndSize (\r
- ConVarName,\r
- &gEfiGlobalVariableGuid,\r
- &DevicePathSize\r
- );\r
- \r
- //\r
- // Initialize NewDevicePath\r
- //\r
- NewDevicePath = VarConsole;\r
- \r
- //\r
- // If ExclusiveDevicePath is even the part of the instance in VarConsole, delete it.\r
- // In the end, NewDevicePath is the final device path.\r
- //\r
- if (ExclusiveDevicePath != NULL && VarConsole != NULL) {\r
- NewDevicePath = BdsLibDelPartMatchInstance (VarConsole, ExclusiveDevicePath);\r
- }\r
- //\r
- // Try to append customized device path to NewDevicePath.\r
- //\r
- if (CustomizedConDevicePath != NULL) {\r
- if (!BdsLibMatchDevicePaths (NewDevicePath, CustomizedConDevicePath)) {\r
- //\r
- // Check if there is part of CustomizedConDevicePath in NewDevicePath, delete it.\r
- //\r
- NewDevicePath = BdsLibDelPartMatchInstance (NewDevicePath, CustomizedConDevicePath);\r
- //\r
- // In the first check, the default console variable will be null,\r
- // just append current customized device path\r
- //\r
- TempNewDevicePath = NewDevicePath;\r
- NewDevicePath = AppendDevicePathInstance (NewDevicePath, CustomizedConDevicePath);\r
- BdsLibSafeFreePool(TempNewDevicePath);\r
- }\r
- }\r
- \r
- //\r
- // The attribute for ConInDev, ConOutDev and ErrOutDev does not include NV.\r
- //\r
- if (IsNvNeed(ConVarName)) {\r
- //\r
- // ConVarName has NV attribute.\r
- //\r
- Attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE;\r
- } else {\r
- //\r
- // ConVarName does not have NV attribute.\r
- //\r
- Attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;\r
- }\r
- \r
- //\r
- // Finally, Update the variable of the default console by NewDevicePath\r
- //\r
- gRT->SetVariable (\r
- ConVarName,\r
- &gEfiGlobalVariableGuid,\r
- Attributes,\r
- GetDevicePathSize (NewDevicePath),\r
- NewDevicePath\r
- );\r
-\r
- if (VarConsole == NewDevicePath) {\r
- BdsLibSafeFreePool(VarConsole);\r
- } else {\r
- BdsLibSafeFreePool(VarConsole);\r
- BdsLibSafeFreePool(NewDevicePath);\r
- }\r
-\r
- return EFI_SUCCESS;\r
-\r
-}\r
-\r
-EFI_STATUS\r
-BdsLibConnectConsoleVariable (\r
- IN CHAR16 *ConVarName\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Connect the console device base on the variable ConVarName, if\r
- device path of the ConVarName is multi-instance device path, if\r
- anyone of the instances is connected success, then this function\r
- will return success.\r
-\r
-Arguments:\r
-\r
- ConVarName - Console related variable name, ConIn, ConOut, ErrOut.\r
-\r
-Returns:\r
-\r
- EFI_NOT_FOUND - There is not any console devices connected success\r
- \r
- EFI_SUCCESS - Success connect any one instance of the console\r
- device path base on the variable ConVarName.\r
-\r
---*/\r
-{\r
- EFI_STATUS Status;\r
- EFI_DEVICE_PATH_PROTOCOL *StartDevicePath;\r
- UINTN VariableSize;\r
- EFI_DEVICE_PATH_PROTOCOL *Instance;\r
- EFI_DEVICE_PATH_PROTOCOL *Next;\r
- EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;\r
- UINTN Size;\r
- BOOLEAN DeviceExist;\r
-\r
- Status = EFI_SUCCESS;\r
- DeviceExist = FALSE;\r
-\r
- //\r
- // Check if the console variable exist\r
- //\r
- StartDevicePath = BdsLibGetVariableAndSize (\r
- ConVarName,\r
- &gEfiGlobalVariableGuid,\r
- &VariableSize\r
- );\r
- if (StartDevicePath == NULL) {\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- CopyOfDevicePath = StartDevicePath;\r
- do {\r
- //\r
- // Check every instance of the console variable\r
- //\r
- Instance = GetNextDevicePathInstance (&CopyOfDevicePath, &Size);\r
- Next = Instance;\r
- while (!IsDevicePathEndType (Next)) {\r
- Next = NextDevicePathNode (Next);\r
- }\r
-\r
- SetDevicePathEndNode (Next);\r
-\r
- //\r
- // Connect the instance device path\r
- //\r
- Status = BdsLibConnectDevicePath (Instance);\r
- if (EFI_ERROR (Status)) {\r
- //\r
- // Delete the instance from the console varialbe\r
- //\r
- BdsLibUpdateConsoleVariable (ConVarName, NULL, Instance);\r
- } else {\r
- DeviceExist = TRUE;\r
- }\r
- BdsLibSafeFreePool(Instance);\r
- } while (CopyOfDevicePath != NULL);\r
-\r
- gBS->FreePool (StartDevicePath);\r
-\r
- if (DeviceExist == FALSE) {\r
- return EFI_NOT_FOUND;\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-VOID\r
-BdsLibConnectAllConsoles (\r
- VOID\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function will search every simpletxt devive in current system,\r
- and make every simpletxt device as pertantial console device.\r
-\r
-Arguments:\r
-\r
- None\r
-\r
-Returns:\r
-\r
- None\r
-\r
---*/\r
-{\r
- EFI_STATUS Status;\r
- UINTN Index;\r
- EFI_DEVICE_PATH_PROTOCOL *ConDevicePath;\r
- UINTN HandleCount;\r
- EFI_HANDLE *HandleBuffer;\r
-\r
- Index = 0;\r
- HandleCount = 0;\r
- HandleBuffer = NULL;\r
- ConDevicePath = NULL;\r
-\r
- //\r
- // Update all the console varables\r
- //\r
- Status = gBS->LocateHandleBuffer (\r
- ByProtocol,\r
- &gEfiSimpleTextInProtocolGuid,\r
- NULL,\r
- &HandleCount,\r
- &HandleBuffer\r
- );\r
- for (Index = 0; Index < HandleCount; Index++) {\r
- Status = gBS->HandleProtocol (\r
- HandleBuffer[Index],\r
- &gEfiDevicePathProtocolGuid,\r
- (VOID **) &ConDevicePath\r
- );\r
- BdsLibUpdateConsoleVariable (L"ConIn", ConDevicePath, NULL);\r
- }\r
-\r
- BdsLibSafeFreePool(HandleBuffer);\r
-\r
- Status = gBS->LocateHandleBuffer (\r
- ByProtocol,\r
- &gEfiSimpleTextOutProtocolGuid,\r
- NULL,\r
- &HandleCount,\r
- &HandleBuffer\r
- );\r
- for (Index = 0; Index < HandleCount; Index++) {\r
- Status = gBS->HandleProtocol (\r
- HandleBuffer[Index],\r
- &gEfiDevicePathProtocolGuid,\r
- (VOID **) &ConDevicePath\r
- );\r
- BdsLibUpdateConsoleVariable (L"ConOut", ConDevicePath, NULL);\r
- BdsLibUpdateConsoleVariable (L"ErrOut", ConDevicePath, NULL);\r
- }\r
-\r
- BdsLibSafeFreePool(HandleBuffer);\r
-\r
- //\r
- // Connect all console variables\r
- //\r
- BdsLibConnectAllDefaultConsoles ();\r
-\r
-}\r
-\r
-EFI_STATUS\r
-BdsLibConnectAllDefaultConsoles (\r
- VOID\r
- )\r
-/*++\r
-\r
-Routine Description:\r
-\r
- This function will connect console device base on the console \r
- device variable ConIn, ConOut and ErrOut.\r
-\r
-Arguments:\r
-\r
- None\r
-\r
-Returns:\r
-\r
- EFI_SUCCESS - At least one of the ConIn and ConOut device have\r
- been connected success.\r
- \r
- EFI_STATUS - Return the status of BdsLibConnectConsoleVariable ().\r
-\r
---*/\r
-{\r
- EFI_STATUS Status;\r
-\r
- //\r
- // Connect all default console variables\r
- //\r
-\r
- //\r
- // Because possibly the platform is legacy free, in such case,\r
- // ConIn devices (Serial Port and PS2 Keyboard ) does not exist, \r
- // so we need not check the status.\r
- // \r
- BdsLibConnectConsoleVariable (L"ConIn");\r
-\r
- // \r
- // It seems impossible not to have any ConOut device on platform,\r
- // so we check the status here.\r
- //\r
- Status = BdsLibConnectConsoleVariable (L"ConOut");\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
- //\r
- // Special treat the err out device, becaues the null\r
- // err out var is legal.\r
- //\r
- BdsLibConnectConsoleVariable (L"ErrOut");\r
-\r
- return EFI_SUCCESS;\r
-\r
-}\r
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