2 * linux/arch/arm/kernel/early_printk.c
4 * Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/console.h>
13 #include <linux/init.h>
14 #include <linux/string.h>
16 extern void printascii(const char *);
18 static void early_write(const char *s, unsigned n)
22 unsigned l = min(n, sizeof(buf)-1);
31 static void early_console_write(struct console *con, const char *s, unsigned n)
36 static struct console early_console_dev = {
38 .write = early_console_write,
39 .flags = CON_PRINTBUFFER | CON_BOOT,
43 static int __init setup_early_printk(char *buf)
45 early_console = &early_console_dev;
46 register_console(&early_console_dev);
50 early_param("earlyprintk", setup_early_printk);