1 files changed, 49 insertions, 0 deletions
diff --git a/src/arch/i386/lib/failover.c b/src/arch/i386/lib/failover.c
new file mode 100644
index 0000000000..328f3547e2
--- /dev/null
+++ b/src/arch/i386/lib/failover.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the LinuxBIOS project.
+ *
+ * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#define ASSEMBLY 1
+
+#include <arch/io.h>
+#include "arch/romcc_io.h"
+#include "pc80/mc146818rtc_early.c"
+
+/**
+ * Check whether the normal or the fallback image should be booted
+ * (by reading the proper flag from CMOS), and boot it.
+ *
+ * @param bist The input BIST value.
+ * @return The BIST value.
+ */
+static unsigned long main(unsigned long bist)
+{
+	if (do_normal_boot())
+		goto normal_image;
+	else
+		goto fallback_image;
+
+normal_image:
+	__asm__ __volatile__("jmp __normal_image" : : "a" (bist) : );
+
+cpu_reset:
+	__asm__ __volatile__("jmp __cpu_reset" : : "a" (bist) : );
+
+fallback_image:
+	return bist;
+}