1 files changed, 44 insertions, 0 deletions
diff --git a/arch/x86/boot/main_entry.c b/arch/x86/boot/main_entry.c
new file mode 100644
index 0000000000..5f199e985b
--- /dev/null
+++ b/arch/x86/boot/main_entry.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009 Juergen Beisert, Pengutronix
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+/**
+ * @file
+ * @brief Start of the 32 bit flat mode
+ */
+
+#include <string.h>
+
+/* These symbols are generated by the linker */
+extern char __bss_start;
+extern char __bss_end;
+
+extern void start_barebox(void);
+
+/**
+ * Called plainly from assembler that switches from real to flat mode
+ *
+ * @note The C environment isn't initialized yet
+ */
+void uboot_entry(void)
+{
+	/* clear the BSS first */
+	memset(&__bss_start, 0x00, &__bss_end - &__bss_start);
+	start_barebox();
+}