Initial import

1 files changed, 46 insertions, 0 deletions

diff --git a/arch/arm/kernel/early_printk.c b/arch/arm/kernel/early_printk.c
new file mode 100644
index 000000000..430765369
--- /dev/null
+++ b/arch/arm/kernel/early_printk.c
@@ -0,0 +1,46 @@
+/*
+ *  linux/arch/arm/kernel/early_printk.c
+ *
+ *  Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/init.h>
+
+extern void printch(int);
+
+static void early_write(const char *s, unsigned n)
+{
+	while (n-- > 0) {
+		if (*s == '\n')
+			printch('\r');
+		printch(*s);
+		s++;
+	}
+}
+
+static void early_console_write(struct console *con, const char *s, unsigned n)
+{
+	early_write(s, n);
+}
+
+static struct console early_console_dev = {
+	.name =		"earlycon",
+	.write =	early_console_write,
+	.flags =	CON_PRINTBUFFER | CON_BOOT,
+	.index =	-1,
+};
+
+static int __init setup_early_printk(char *buf)
+{
+	early_console = &early_console_dev;
+	register_console(&early_console_dev);
+	return 0;
+}
+
+early_param("earlyprintk", setup_early_printk);