Imported Upstream version 3.12

[debian/elilo] / console.c

diff --git a/console.c b/console.c
new file mode 100644 (file)
index 0000000..e7a8f41
--- /dev/null
+++ b/console.c
@@ -0,0 +1,71 @@
+/* 
+ * console.c - Console screen handling functions
+ *
+ *  Copyright (C) 2006 Christoph Pfisterer
+ *
+ * This file is part of the ELILO, the EFI Linux boot loader.
+ *
+ *  ELILO is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  ELILO is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with ELILO; see the file COPYING.  If not, write to the Free
+ *  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ *  02111-1307, USA.
+ *
+ * Please check out the elilo.txt for complete documentation on how
+ * to use this program.
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "elilo.h"
+
+#include <efiConsoleControl.h>
+
+static EFI_GUID console_guid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
+
+static BOOLEAN console_inited = FALSE;
+
+static EFI_CONSOLE_CONTROL_PROTOCOL *console_control;
+
+/*
+ * Initialize console functions
+ */
+static VOID console_init(VOID)
+{
+       EFI_STATUS status;
+
+       if (!console_inited) {
+               console_inited = TRUE;
+
+               status = LibLocateProtocol(&console_guid, (VOID **) &console_control);
+               if (EFI_ERROR(status))
+                       console_control = NULL;
+       }
+}
+
+/*
+ * Switch the console to text mode
+ */
+
+VOID console_textmode(VOID)
+{
+       EFI_CONSOLE_CONTROL_SCREEN_MODE console_mode;
+
+       console_init();
+
+       if (console_control != NULL) {
+               uefi_call_wrapper(console_control->GetMode, 4, console_control, &console_mode, NULL, NULL);
+               if (console_mode == EfiConsoleControlScreenGraphics)
+                       uefi_call_wrapper(console_control->SetMode, 2, console_control, EfiConsoleControlScreenText);
+       }
+}