diff options
Diffstat (limited to 'Core/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c')
| -rw-r--r-- | Core/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c | 908 |
1 files changed, 908 insertions, 0 deletions
diff --git a/Core/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c b/Core/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c new file mode 100644 index 0000000000..9fa952ad2a --- /dev/null +++ b/Core/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c @@ -0,0 +1,908 @@ +/** @file
+ Implementation for EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL protocol.
+
+Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+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 "Terminal.h"
+
+//
+// This list is used to define the valid extend chars.
+// It also provides a mapping from Unicode to PCANSI or
+// ASCII. The ASCII mapping we just made up.
+//
+//
+UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
+ { BOXDRAW_HORIZONTAL, 0xc4, L'-' },
+ { BOXDRAW_VERTICAL, 0xb3, L'|' },
+ { BOXDRAW_DOWN_RIGHT, 0xda, L'/' },
+ { BOXDRAW_DOWN_LEFT, 0xbf, L'\\' },
+ { BOXDRAW_UP_RIGHT, 0xc0, L'\\' },
+ { BOXDRAW_UP_LEFT, 0xd9, L'/' },
+ { BOXDRAW_VERTICAL_RIGHT, 0xc3, L'|' },
+ { BOXDRAW_VERTICAL_LEFT, 0xb4, L'|' },
+ { BOXDRAW_DOWN_HORIZONTAL, 0xc2, L'+' },
+ { BOXDRAW_UP_HORIZONTAL, 0xc1, L'+' },
+ { BOXDRAW_VERTICAL_HORIZONTAL, 0xc5, L'+' },
+ { BOXDRAW_DOUBLE_HORIZONTAL, 0xcd, L'-' },
+ { BOXDRAW_DOUBLE_VERTICAL, 0xba, L'|' },
+ { BOXDRAW_DOWN_RIGHT_DOUBLE, 0xd5, L'/' },
+ { BOXDRAW_DOWN_DOUBLE_RIGHT, 0xd6, L'/' },
+ { BOXDRAW_DOUBLE_DOWN_RIGHT, 0xc9, L'/' },
+ { BOXDRAW_DOWN_LEFT_DOUBLE, 0xb8, L'\\' },
+ { BOXDRAW_DOWN_DOUBLE_LEFT, 0xb7, L'\\' },
+ { BOXDRAW_DOUBLE_DOWN_LEFT, 0xbb, L'\\' },
+ { BOXDRAW_UP_RIGHT_DOUBLE, 0xd4, L'\\' },
+ { BOXDRAW_UP_DOUBLE_RIGHT, 0xd3, L'\\' },
+ { BOXDRAW_DOUBLE_UP_RIGHT, 0xc8, L'\\' },
+ { BOXDRAW_UP_LEFT_DOUBLE, 0xbe, L'/' },
+ { BOXDRAW_UP_DOUBLE_LEFT, 0xbd, L'/' },
+ { BOXDRAW_DOUBLE_UP_LEFT, 0xbc, L'/' },
+ { BOXDRAW_VERTICAL_RIGHT_DOUBLE, 0xc6, L'|' },
+ { BOXDRAW_VERTICAL_DOUBLE_RIGHT, 0xc7, L'|' },
+ { BOXDRAW_DOUBLE_VERTICAL_RIGHT, 0xcc, L'|' },
+ { BOXDRAW_VERTICAL_LEFT_DOUBLE, 0xb5, L'|' },
+ { BOXDRAW_VERTICAL_DOUBLE_LEFT, 0xb6, L'|' },
+ { BOXDRAW_DOUBLE_VERTICAL_LEFT, 0xb9, L'|' },
+ { BOXDRAW_DOWN_HORIZONTAL_DOUBLE, 0xd1, L'+' },
+ { BOXDRAW_DOWN_DOUBLE_HORIZONTAL, 0xd2, L'+' },
+ { BOXDRAW_DOUBLE_DOWN_HORIZONTAL, 0xcb, L'+' },
+ { BOXDRAW_UP_HORIZONTAL_DOUBLE, 0xcf, L'+' },
+ { BOXDRAW_UP_DOUBLE_HORIZONTAL, 0xd0, L'+' },
+ { BOXDRAW_DOUBLE_UP_HORIZONTAL, 0xca, L'+' },
+ { BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+' },
+ { BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+' },
+ { BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+' },
+
+ { BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*' },
+ { BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+' },
+
+ { GEOMETRICSHAPE_UP_TRIANGLE, 0x1e, L'^' },
+ { GEOMETRICSHAPE_RIGHT_TRIANGLE, 0x10, L'>' },
+ { GEOMETRICSHAPE_DOWN_TRIANGLE, 0x1f, L'v' },
+ { GEOMETRICSHAPE_LEFT_TRIANGLE, 0x11, L'<' },
+
+ { ARROW_LEFT, 0x3c, L'<' },
+ { ARROW_UP, 0x18, L'^' },
+ { ARROW_RIGHT, 0x3e, L'>' },
+ { ARROW_DOWN, 0x19, L'v' },
+
+ { 0x0000, 0x00, L'\0' }
+};
+
+CHAR16 mSetModeString[] = { ESC, '[', '=', '3', 'h', 0 };
+CHAR16 mSetAttributeString[] = { ESC, '[', '0', 'm', ESC, '[', '4', '0', 'm', ESC, '[', '4', '0', 'm', 0 };
+CHAR16 mClearScreenString[] = { ESC, '[', '2', 'J', 0 };
+CHAR16 mSetCursorPositionString[] = { ESC, '[', '0', '0', ';', '0', '0', 'H', 0 };
+
+//
+// Body of the ConOut functions
+//
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.Reset().
+
+ If ExtendeVerification is TRUE, then perform dependent serial device reset,
+ and set display mode to mode 0.
+ If ExtendedVerification is FALSE, only set display mode to mode 0.
+
+ @param This Indicates the calling context.
+ @param ExtendedVerification Indicates that the driver may perform a more
+ exhaustive verification operation of the device
+ during reset.
+
+ @retval EFI_SUCCESS The reset operation succeeds.
+ @retval EFI_DEVICE_ERROR The terminal is not functioning correctly or the serial port reset fails.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutReset (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ EFI_STATUS Status;
+ TERMINAL_DEV *TerminalDevice;
+
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ //
+ // Perform a more exhaustive reset by resetting the serial port.
+ //
+ if (ExtendedVerification) {
+ //
+ // Report progress code here
+ //
+ REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+ EFI_PROGRESS_CODE,
+ (EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_PC_RESET),
+ TerminalDevice->DevicePath
+ );
+
+ Status = TerminalDevice->SerialIo->Reset (TerminalDevice->SerialIo);
+ if (EFI_ERROR (Status)) {
+ //
+ // Report error code here
+ //
+ REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+ EFI_ERROR_CODE | EFI_ERROR_MINOR,
+ (EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_EC_CONTROLLER_ERROR),
+ TerminalDevice->DevicePath
+ );
+
+ return Status;
+ }
+ }
+
+ This->SetAttribute (This, EFI_TEXT_ATTR (This->Mode->Attribute & 0x0F, EFI_BLACK));
+
+ Status = This->SetMode (This, 0);
+
+ return Status;
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString().
+
+ The Unicode string will be converted to terminal expressible data stream
+ and send to terminal via serial port.
+
+ @param This Indicates the calling context.
+ @param WString The Null-terminated Unicode string to be displayed
+ on the terminal screen.
+
+ @retval EFI_SUCCESS The string is output successfully.
+ @retval EFI_DEVICE_ERROR The serial port fails to send the string out.
+ @retval EFI_WARN_UNKNOWN_GLYPH Indicates that some of the characters in the Unicode string could not
+ be rendered and are skipped.
+ @retval EFI_UNSUPPORTED If current display mode is out of range.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutOutputString (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN CHAR16 *WString
+ )
+{
+ TERMINAL_DEV *TerminalDevice;
+ EFI_SIMPLE_TEXT_OUTPUT_MODE *Mode;
+ UINTN MaxColumn;
+ UINTN MaxRow;
+ UINTN Length;
+ UTF8_CHAR Utf8Char;
+ CHAR8 GraphicChar;
+ CHAR8 AsciiChar;
+ EFI_STATUS Status;
+ UINT8 ValidBytes;
+ //
+ // flag used to indicate whether condition happens which will cause
+ // return EFI_WARN_UNKNOWN_GLYPH
+ //
+ BOOLEAN Warning;
+
+ ValidBytes = 0;
+ Warning = FALSE;
+ AsciiChar = 0;
+
+ //
+ // get Terminal device data structure pointer.
+ //
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ //
+ // Get current display mode
+ //
+ Mode = This->Mode;
+
+ if (Mode->Mode >= Mode->MaxMode) {
+ return EFI_UNSUPPORTED;
+ }
+
+ This->QueryMode (
+ This,
+ Mode->Mode,
+ &MaxColumn,
+ &MaxRow
+ );
+
+ for (; *WString != CHAR_NULL; WString++) {
+
+ switch (TerminalDevice->TerminalType) {
+
+ case PCANSITYPE:
+ case VT100TYPE:
+ case VT100PLUSTYPE:
+ case TTYTERMTYPE:
+
+ if (!TerminalIsValidTextGraphics (*WString, &GraphicChar, &AsciiChar)) {
+ //
+ // If it's not a graphic character convert Unicode to ASCII.
+ //
+ GraphicChar = (CHAR8) *WString;
+
+ if (!(TerminalIsValidAscii (GraphicChar) || TerminalIsValidEfiCntlChar (GraphicChar))) {
+ //
+ // when this driver use the OutputString to output control string,
+ // TerminalDevice->OutputEscChar is set to let the Esc char
+ // to be output to the terminal emulation software.
+ //
+ if ((GraphicChar == 27) && TerminalDevice->OutputEscChar) {
+ GraphicChar = 27;
+ } else {
+ GraphicChar = '?';
+ Warning = TRUE;
+ }
+ }
+
+ AsciiChar = GraphicChar;
+
+ }
+
+ if (TerminalDevice->TerminalType != PCANSITYPE) {
+ GraphicChar = AsciiChar;
+ }
+
+ Length = 1;
+
+ Status = TerminalDevice->SerialIo->Write (
+ TerminalDevice->SerialIo,
+ &Length,
+ &GraphicChar
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto OutputError;
+ }
+
+ break;
+
+ case VTUTF8TYPE:
+ UnicodeToUtf8 (*WString, &Utf8Char, &ValidBytes);
+ Length = ValidBytes;
+ Status = TerminalDevice->SerialIo->Write (
+ TerminalDevice->SerialIo,
+ &Length,
+ (UINT8 *) &Utf8Char
+ );
+ if (EFI_ERROR (Status)) {
+ goto OutputError;
+ }
+ break;
+ }
+ //
+ // Update cursor position.
+ //
+ switch (*WString) {
+
+ case CHAR_BACKSPACE:
+ if (Mode->CursorColumn > 0) {
+ Mode->CursorColumn--;
+ }
+ break;
+
+ case CHAR_LINEFEED:
+ if (Mode->CursorRow < (INT32) (MaxRow - 1)) {
+ Mode->CursorRow++;
+ }
+ break;
+
+ case CHAR_CARRIAGE_RETURN:
+ Mode->CursorColumn = 0;
+ break;
+
+ default:
+ if (Mode->CursorColumn < (INT32) (MaxColumn - 1)) {
+
+ Mode->CursorColumn++;
+
+ } else {
+
+ Mode->CursorColumn = 0;
+ if (Mode->CursorRow < (INT32) (MaxRow - 1)) {
+ Mode->CursorRow++;
+ }
+
+ }
+ break;
+
+ };
+
+ }
+
+ if (Warning) {
+ return EFI_WARN_UNKNOWN_GLYPH;
+ }
+
+ return EFI_SUCCESS;
+
+OutputError:
+ REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+ EFI_ERROR_CODE | EFI_ERROR_MINOR,
+ (EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_EC_OUTPUT_ERROR),
+ TerminalDevice->DevicePath
+ );
+
+ return EFI_DEVICE_ERROR;
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.TestString().
+
+ If one of the characters in the *Wstring is
+ neither valid Unicode drawing characters,
+ not ASCII code, then this function will return
+ EFI_UNSUPPORTED.
+
+ @param This Indicates the calling context.
+ @param WString The Null-terminated Unicode string to be tested.
+
+ @retval EFI_SUCCESS The terminal is capable of rendering the output string.
+ @retval EFI_UNSUPPORTED Some of the characters in the Unicode string cannot be rendered.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutTestString (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN CHAR16 *WString
+ )
+{
+ TERMINAL_DEV *TerminalDevice;
+ EFI_STATUS Status;
+
+ //
+ // get Terminal device data structure pointer.
+ //
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ switch (TerminalDevice->TerminalType) {
+
+ case PCANSITYPE:
+ case VT100TYPE:
+ case VT100PLUSTYPE:
+ case TTYTERMTYPE:
+ Status = AnsiTestString (TerminalDevice, WString);
+ break;
+
+ case VTUTF8TYPE:
+ Status = VTUTF8TestString (TerminalDevice, WString);
+ break;
+
+ default:
+ Status = EFI_UNSUPPORTED;
+ break;
+ }
+
+ return Status;
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode().
+
+ It returns information for an available text mode
+ that the terminal supports.
+
+ @param This Indicates the calling context.
+ @param ModeNumber The mode number to return information on.
+ @param Columns The returned columns of the requested mode.
+ @param Rows The returned rows of the requested mode.
+
+ @retval EFI_SUCCESS The requested mode information is returned.
+ @retval EFI_UNSUPPORTED The mode number is not valid.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutQueryMode (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN UINTN ModeNumber,
+ OUT UINTN *Columns,
+ OUT UINTN *Rows
+ )
+{
+ TERMINAL_DEV *TerminalDevice;
+
+ if (ModeNumber >= (UINTN) This->Mode->MaxMode) {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Get Terminal device data structure pointer.
+ //
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+ *Columns = TerminalDevice->TerminalConsoleModeData[ModeNumber].Columns;
+ *Rows = TerminalDevice->TerminalConsoleModeData[ModeNumber].Rows;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUT.SetMode().
+
+ Set the terminal to a specified display mode.
+ In this driver, we only support mode 0.
+
+ @param This Indicates the calling context.
+ @param ModeNumber The text mode to set.
+
+ @retval EFI_SUCCESS The requested text mode is set.
+ @retval EFI_DEVICE_ERROR The requested text mode cannot be set
+ because of serial device error.
+ @retval EFI_UNSUPPORTED The text mode number is not valid.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutSetMode (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN UINTN ModeNumber
+ )
+{
+ EFI_STATUS Status;
+ TERMINAL_DEV *TerminalDevice;
+
+ //
+ // get Terminal device data structure pointer.
+ //
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ if (ModeNumber >= (UINTN) This->Mode->MaxMode) {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Set the current mode
+ //
+ This->Mode->Mode = (INT32) ModeNumber;
+
+ This->ClearScreen (This);
+
+ TerminalDevice->OutputEscChar = TRUE;
+ Status = This->OutputString (This, mSetModeString);
+ TerminalDevice->OutputEscChar = FALSE;
+
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ This->Mode->Mode = (INT32) ModeNumber;
+
+ Status = This->ClearScreen (This);
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ return EFI_SUCCESS;
+
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute().
+
+ @param This Indicates the calling context.
+ @param Attribute The attribute to set. Only bit0..6 are valid, all other bits
+ are undefined and must be zero.
+
+ @retval EFI_SUCCESS The requested attribute is set.
+ @retval EFI_DEVICE_ERROR The requested attribute cannot be set due to serial port error.
+ @retval EFI_UNSUPPORTED The attribute requested is not defined by EFI spec.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutSetAttribute (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN UINTN Attribute
+ )
+{
+ UINT8 ForegroundControl;
+ UINT8 BackgroundControl;
+ UINT8 BrightControl;
+ INT32 SavedColumn;
+ INT32 SavedRow;
+ EFI_STATUS Status;
+ TERMINAL_DEV *TerminalDevice;
+
+ SavedColumn = 0;
+ SavedRow = 0;
+
+ //
+ // get Terminal device data structure pointer.
+ //
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ //
+ // only the bit0..6 of the Attribute is valid
+ //
+ if ((Attribute | 0x7f) != 0x7f) {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Skip outputting the command string for the same attribute
+ // It improves the terminal performance significantly
+ //
+ if (This->Mode->Attribute == (INT32) Attribute) {
+ return EFI_SUCCESS;
+ }
+
+ //
+ // convert Attribute value to terminal emulator
+ // understandable foreground color
+ //
+ switch (Attribute & 0x07) {
+
+ case EFI_BLACK:
+ ForegroundControl = 30;
+ break;
+
+ case EFI_BLUE:
+ ForegroundControl = 34;
+ break;
+
+ case EFI_GREEN:
+ ForegroundControl = 32;
+ break;
+
+ case EFI_CYAN:
+ ForegroundControl = 36;
+ break;
+
+ case EFI_RED:
+ ForegroundControl = 31;
+ break;
+
+ case EFI_MAGENTA:
+ ForegroundControl = 35;
+ break;
+
+ case EFI_BROWN:
+ ForegroundControl = 33;
+ break;
+
+ default:
+
+ case EFI_LIGHTGRAY:
+ ForegroundControl = 37;
+ break;
+
+ }
+ //
+ // bit4 of the Attribute indicates bright control
+ // of terminal emulator.
+ //
+ BrightControl = (UINT8) ((Attribute >> 3) & 1);
+
+ //
+ // convert Attribute value to terminal emulator
+ // understandable background color.
+ //
+ switch ((Attribute >> 4) & 0x07) {
+
+ case EFI_BLACK:
+ BackgroundControl = 40;
+ break;
+
+ case EFI_BLUE:
+ BackgroundControl = 44;
+ break;
+
+ case EFI_GREEN:
+ BackgroundControl = 42;
+ break;
+
+ case EFI_CYAN:
+ BackgroundControl = 46;
+ break;
+
+ case EFI_RED:
+ BackgroundControl = 41;
+ break;
+
+ case EFI_MAGENTA:
+ BackgroundControl = 45;
+ break;
+
+ case EFI_BROWN:
+ BackgroundControl = 43;
+ break;
+
+ default:
+
+ case EFI_LIGHTGRAY:
+ BackgroundControl = 47;
+ break;
+ }
+ //
+ // terminal emulator's control sequence to set attributes
+ //
+ mSetAttributeString[BRIGHT_CONTROL_OFFSET] = (CHAR16) ('0' + BrightControl);
+ mSetAttributeString[FOREGROUND_CONTROL_OFFSET + 0] = (CHAR16) ('0' + (ForegroundControl / 10));
+ mSetAttributeString[FOREGROUND_CONTROL_OFFSET + 1] = (CHAR16) ('0' + (ForegroundControl % 10));
+ mSetAttributeString[BACKGROUND_CONTROL_OFFSET + 0] = (CHAR16) ('0' + (BackgroundControl / 10));
+ mSetAttributeString[BACKGROUND_CONTROL_OFFSET + 1] = (CHAR16) ('0' + (BackgroundControl % 10));
+
+ //
+ // save current column and row
+ // for future scrolling back use.
+ //
+ SavedColumn = This->Mode->CursorColumn;
+ SavedRow = This->Mode->CursorRow;
+
+ TerminalDevice->OutputEscChar = TRUE;
+ Status = This->OutputString (This, mSetAttributeString);
+ TerminalDevice->OutputEscChar = FALSE;
+
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+ //
+ // scroll back to saved cursor position.
+ //
+ This->Mode->CursorColumn = SavedColumn;
+ This->Mode->CursorRow = SavedRow;
+
+ This->Mode->Attribute = (INT32) Attribute;
+
+ return EFI_SUCCESS;
+
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.ClearScreen().
+ It clears the ANSI terminal's display to the
+ currently selected background color.
+
+ @param This Indicates the calling context.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_DEVICE_ERROR The terminal screen cannot be cleared due to serial port error.
+ @retval EFI_UNSUPPORTED The terminal is not in a valid display mode.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutClearScreen (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This
+ )
+{
+ EFI_STATUS Status;
+ TERMINAL_DEV *TerminalDevice;
+
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ //
+ // control sequence for clear screen request
+ //
+ TerminalDevice->OutputEscChar = TRUE;
+ Status = This->OutputString (This, mClearScreenString);
+ TerminalDevice->OutputEscChar = FALSE;
+
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ Status = This->SetCursorPosition (This, 0, 0);
+
+ return Status;
+}
+
+
+/**
+ Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetCursorPosition().
+
+ @param This Indicates the calling context.
+ @param Column The row to set cursor to.
+ @param Row The column to set cursor to.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_DEVICE_ERROR The request fails due to serial port error.
+ @retval EFI_UNSUPPORTED The terminal is not in a valid text mode, or the cursor position
+ is invalid for current mode.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutSetCursorPosition (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN UINTN Column,
+ IN UINTN Row
+ )
+{
+ EFI_SIMPLE_TEXT_OUTPUT_MODE *Mode;
+ UINTN MaxColumn;
+ UINTN MaxRow;
+ EFI_STATUS Status;
+ TERMINAL_DEV *TerminalDevice;
+
+ TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
+
+ //
+ // get current mode
+ //
+ Mode = This->Mode;
+
+ //
+ // get geometry of current mode
+ //
+ Status = This->QueryMode (
+ This,
+ Mode->Mode,
+ &MaxColumn,
+ &MaxRow
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (Column >= MaxColumn || Row >= MaxRow) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // control sequence to move the cursor
+ //
+ mSetCursorPositionString[ROW_OFFSET + 0] = (CHAR16) ('0' + ((Row + 1) / 10));
+ mSetCursorPositionString[ROW_OFFSET + 1] = (CHAR16) ('0' + ((Row + 1) % 10));
+ mSetCursorPositionString[COLUMN_OFFSET + 0] = (CHAR16) ('0' + ((Column + 1) / 10));
+ mSetCursorPositionString[COLUMN_OFFSET + 1] = (CHAR16) ('0' + ((Column + 1) % 10));
+
+ TerminalDevice->OutputEscChar = TRUE;
+ Status = This->OutputString (This, mSetCursorPositionString);
+ TerminalDevice->OutputEscChar = FALSE;
+
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+ //
+ // update current cursor position
+ // in the Mode data structure.
+ //
+ Mode->CursorColumn = (INT32) Column;
+ Mode->CursorRow = (INT32) Row;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Implements SIMPLE_TEXT_OUTPUT.EnableCursor().
+
+ In this driver, the cursor cannot be hidden.
+
+ @param This Indicates the calling context.
+ @param Visible If TRUE, the cursor is set to be visible,
+ If FALSE, the cursor is set to be invisible.
+
+ @retval EFI_SUCCESS The request is valid.
+ @retval EFI_UNSUPPORTED The terminal does not support cursor hidden.
+
+**/
+EFI_STATUS
+EFIAPI
+TerminalConOutEnableCursor (
+ IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
+ IN BOOLEAN Visible
+ )
+{
+ if (!Visible) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Detects if a Unicode char is for Box Drawing text graphics.
+
+ @param Graphic Unicode char to test.
+ @param PcAnsi Optional pointer to return PCANSI equivalent of
+ Graphic.
+ @param Ascii Optional pointer to return ASCII equivalent of
+ Graphic.
+
+ @retval TRUE If Graphic is a supported Unicode Box Drawing character.
+
+**/
+BOOLEAN
+TerminalIsValidTextGraphics (
+ IN CHAR16 Graphic,
+ OUT CHAR8 *PcAnsi, OPTIONAL
+ OUT CHAR8 *Ascii OPTIONAL
+ )
+{
+ UNICODE_TO_CHAR *Table;
+
+ if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
+ //
+ // Unicode drawing code charts are all in the 0x25xx range,
+ // arrows are 0x21xx
+ //
+ return FALSE;
+ }
+
+ for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
+ if (Graphic == Table->Unicode) {
+ if (PcAnsi != NULL) {
+ *PcAnsi = Table->PcAnsi;
+ }
+
+ if (Ascii != NULL) {
+ *Ascii = Table->Ascii;
+ }
+
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+/**
+ Detects if a valid ASCII char.
+
+ @param Ascii An ASCII character.
+
+ @retval TRUE If it is a valid ASCII character.
+ @retval FALSE If it is not a valid ASCII character.
+
+**/
+BOOLEAN
+TerminalIsValidAscii (
+ IN CHAR16 Ascii
+ )
+{
+ //
+ // valid ascii code lies in the extent of 0x20 ~ 0x7f
+ //
+ if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ Detects if a valid EFI control character.
+
+ @param CharC An input EFI Control character.
+
+ @retval TRUE If it is a valid EFI control character.
+ @retval FALSE If it is not a valid EFI control character.
+
+**/
+BOOLEAN
+TerminalIsValidEfiCntlChar (
+ IN CHAR16 CharC
+ )
+{
+ //
+ // only support four control characters.
+ //
+ if (CharC == CHAR_NULL ||
+ CharC == CHAR_BACKSPACE ||
+ CharC == CHAR_LINEFEED ||
+ CharC == CHAR_CARRIAGE_RETURN ||
+ CharC == CHAR_TAB
+ ) {
+ return TRUE;
+ }
+
+ return FALSE;
+}
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