diff options
Diffstat (limited to 'EdkNt32Pkg/Library/EdkGenericBdsLib/BdsConsole.c')
| -rw-r--r-- | EdkNt32Pkg/Library/EdkGenericBdsLib/BdsConsole.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/EdkNt32Pkg/Library/EdkGenericBdsLib/BdsConsole.c b/EdkNt32Pkg/Library/EdkGenericBdsLib/BdsConsole.c new file mode 100644 index 0000000000..721d74363a --- /dev/null +++ b/EdkNt32Pkg/Library/EdkGenericBdsLib/BdsConsole.c @@ -0,0 +1,370 @@ +/*++
+
+Copyright (c) 2006, 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.
+
+Module Name:
+
+ BdsConsole.c
+
+Abstract:
+
+ BDS Lib functions which contain all the code to connect console device
+
+--*/
+
+EFI_STATUS
+BdsLibUpdateConsoleVariable (
+ IN CHAR16 *ConVarName,
+ IN EFI_DEVICE_PATH_PROTOCOL *CustomizedConDevicePath,
+ IN EFI_DEVICE_PATH_PROTOCOL *ExclusiveDevicePath
+ )
+/*++
+
+Routine Description:
+
+ This function update console variable based on ConVarName, it can
+ add or remove one specific console device path from the variable
+
+Arguments:
+
+ ConVarName - Console related variable name, ConIn, ConOut, ErrOut.
+
+ CustomizedConDevicePath - The console device path which will be added to
+ the console variable ConVarName, this parameter
+ can not be multi-instance.
+
+ ExclusiveDevicePath - The console device path which will be removed
+ from the console variable ConVarName, this
+ parameter can not be multi-instance.
+
+Returns:
+
+ EFI_UNSUPPORTED - Add or remove the same device path.
+
+ EFI_SUCCESS - Success add or remove the device path from
+ the console variable.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_DEVICE_PATH_PROTOCOL *VarConsole;
+ UINTN DevicePathSize;
+ EFI_DEVICE_PATH_PROTOCOL *Instance;
+ EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
+
+ VarConsole = NULL;
+ DevicePathSize = 0;
+ NewDevicePath = NULL;
+ Status = EFI_UNSUPPORTED;
+
+ //
+ // Notes: check the device path point, here should check
+ // with compare memory
+ //
+ if (CustomizedConDevicePath == ExclusiveDevicePath) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Delete the ExclusiveDevicePath from current default console
+ //
+ VarConsole = BdsLibGetVariableAndSize (
+ ConVarName,
+ &gEfiGlobalVariableGuid,
+ &DevicePathSize
+ );
+
+ if (ExclusiveDevicePath != NULL && VarConsole != NULL) {
+ if (BdsLibMatchDevicePaths (VarConsole, ExclusiveDevicePath)) {
+
+ Instance = GetNextDevicePathInstance (&VarConsole, &DevicePathSize);
+
+ while (VarConsole != NULL) {
+ if (CompareMem (
+ Instance,
+ ExclusiveDevicePath,
+ DevicePathSize - sizeof (EFI_DEVICE_PATH_PROTOCOL)
+ ) == 0) {
+ //
+ // Remove the match part
+ //
+ NewDevicePath = AppendDevicePathInstance (NewDevicePath, VarConsole);
+ break;
+ } else {
+ //
+ // Continue the next instance
+ //
+ NewDevicePath = AppendDevicePathInstance (NewDevicePath, Instance);
+ }
+
+ Instance = GetNextDevicePathInstance (&VarConsole, &DevicePathSize);
+ }
+ //
+ // Reset the console variable with new device path
+ //
+ gRT->SetVariable (
+ ConVarName,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ GetDevicePathSize (NewDevicePath),
+ NewDevicePath
+ );
+ }
+ }
+ //
+ // Try to append customized device path
+ //
+ VarConsole = BdsLibGetVariableAndSize (
+ ConVarName,
+ &gEfiGlobalVariableGuid,
+ &DevicePathSize
+ );
+
+ if (CustomizedConDevicePath != NULL) {
+ if (!BdsLibMatchDevicePaths (VarConsole, CustomizedConDevicePath)) {
+ //
+ // In the first check, the default console variable will be null,
+ // just append current customized device path
+ //
+ VarConsole = AppendDevicePathInstance (VarConsole, CustomizedConDevicePath);
+
+ //
+ // Update the variable of the default console
+ //
+ gRT->SetVariable (
+ ConVarName,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ GetDevicePathSize (VarConsole),
+ VarConsole
+ );
+ }
+ }
+
+ return EFI_SUCCESS;
+
+}
+
+EFI_STATUS
+BdsLibConnectConsoleVariable (
+ IN CHAR16 *ConVarName
+ )
+/*++
+
+Routine Description:
+
+ Connect the console device base on the variable ConVarName, if
+ device path of the ConVarName is multi-instance device path, if
+ anyone of the instances is connected success, then this function
+ will return success.
+
+Arguments:
+
+ ConVarName - Console related variable name, ConIn, ConOut, ErrOut.
+
+Returns:
+
+ EFI_NOT_FOUND - There is not any console devices connected success
+
+ EFI_SUCCESS - Success connect any one instance of the console
+ device path base on the variable ConVarName.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_DEVICE_PATH_PROTOCOL *StartDevicePath;
+ UINTN VariableSize;
+ EFI_DEVICE_PATH_PROTOCOL *Instance;
+ EFI_DEVICE_PATH_PROTOCOL *Next;
+ EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;
+ UINTN Size;
+ BOOLEAN DeviceExist;
+
+ Status = EFI_SUCCESS;
+ DeviceExist = FALSE;
+
+ //
+ // Check if the console variable exist
+ //
+ StartDevicePath = BdsLibGetVariableAndSize (
+ ConVarName,
+ &gEfiGlobalVariableGuid,
+ &VariableSize
+ );
+ if (StartDevicePath == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+
+ CopyOfDevicePath = DuplicateDevicePath (StartDevicePath);
+ do {
+ //
+ // Check every instance of the console variable
+ //
+ Instance = GetNextDevicePathInstance (&CopyOfDevicePath, &Size);
+ Next = Instance;
+ while (!IsDevicePathEndType (Next)) {
+ Next = NextDevicePathNode (Next);
+ }
+
+ SetDevicePathEndNode (Next);
+
+ //
+ // Connect the instance device path
+ //
+ Status = BdsLibConnectDevicePath (Instance);
+ if (EFI_ERROR (Status)) {
+ //
+ // Delete the instance from the console varialbe
+ //
+ BdsLibUpdateConsoleVariable (ConVarName, NULL, Instance);
+ } else {
+ DeviceExist = TRUE;
+ }
+
+ } while (CopyOfDevicePath != NULL);
+
+ gBS->FreePool (StartDevicePath);
+
+ if (DeviceExist == FALSE) {
+ return EFI_NOT_FOUND;
+ }
+
+ return EFI_SUCCESS;
+}
+
+VOID
+BdsLibConnectAllConsoles (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ This function will search every simpletxt devive in current system,
+ and make every simpletxt device as pertantial console device.
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ EFI_DEVICE_PATH_PROTOCOL *ConDevicePath;
+ UINTN HandleCount;
+ EFI_HANDLE *HandleBuffer;
+
+ Index = 0;
+ HandleCount = 0;
+ HandleBuffer = NULL;
+ ConDevicePath = NULL;
+
+ //
+ // Update all the console varables
+ //
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiSimpleTextInProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiDevicePathProtocolGuid,
+ (VOID **) &ConDevicePath
+ );
+ BdsLibUpdateConsoleVariable (L"ConIn", ConDevicePath, NULL);
+ }
+
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiSimpleTextOutProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiDevicePathProtocolGuid,
+ (VOID **) &ConDevicePath
+ );
+ BdsLibUpdateConsoleVariable (L"ConOut", ConDevicePath, NULL);
+ BdsLibUpdateConsoleVariable (L"ErrOut", ConDevicePath, NULL);
+ }
+ //
+ // Connect all console variables
+ //
+ BdsLibConnectAllDefaultConsoles ();
+
+}
+
+EFI_STATUS
+BdsLibConnectAllDefaultConsoles (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ This function will connect console device base on the console
+ device variable ConIn, ConOut and ErrOut.
+
+Arguments:
+
+ None
+
+Returns:
+
+ EFI_SUCCESS - At least one of the ConIn and ConOut device have
+ been connected success.
+
+ EFI_STATUS - Return the status of BdsLibConnectConsoleVariable ().
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_DEVICE_PATH_PROTOCOL *VarErrout;
+ UINTN DevicePathSize;
+
+ //
+ // Connect all default console variables
+ //
+ Status = BdsLibConnectConsoleVariable (L"ConIn");
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = BdsLibConnectConsoleVariable (L"ConOut");
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Special treat the err out device, becaues the null
+ // err out var is legal.
+ //
+ VarErrout = BdsLibGetVariableAndSize (
+ L"ErrOut",
+ &gEfiGlobalVariableGuid,
+ &DevicePathSize
+ );
+ if (VarErrout != NULL) {
+ BdsLibConnectConsoleVariable (L"ErrOut");
+ }
+
+ return EFI_SUCCESS;
+
+}
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