72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/*
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* console.c - Console screen handling functions
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*
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* Copyright (C) 2006 Christoph Pfisterer
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*
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* This file is part of the ELILO, the EFI Linux boot loader.
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*
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* ELILO is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* ELILO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with ELILO; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Please check out the elilo.txt for complete documentation on how
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* to use this program.
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "elilo.h"
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#include <efiConsoleControl.h>
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static EFI_GUID console_guid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
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static BOOLEAN console_inited = FALSE;
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static EFI_CONSOLE_CONTROL_PROTOCOL *console_control;
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/*
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* Initialize console functions
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*/
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static VOID console_init(VOID)
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{
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EFI_STATUS status;
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if (!console_inited) {
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console_inited = TRUE;
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status = LibLocateProtocol(&console_guid, (VOID **) &console_control);
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if (EFI_ERROR(status))
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console_control = NULL;
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}
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}
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/*
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* Switch the console to text mode
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*/
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VOID console_textmode(VOID)
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{
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EFI_CONSOLE_CONTROL_SCREEN_MODE console_mode;
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console_init();
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if (console_control != NULL) {
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uefi_call_wrapper(console_control->GetMode, 4, console_control, &console_mode, NULL, NULL);
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if (console_mode == EfiConsoleControlScreenGraphics)
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uefi_call_wrapper(console_control->SetMode, 2, console_control, EfiConsoleControlScreenText);
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}
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}
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