1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2002, 2003, 06, 07 Ralf Baechle (ralf@linux-mips.org)
7 * Copyright (C) 2007 MIPS Technologies, Inc.
8 *   written by Ralf Baechle (ralf@linux-mips.org)
9 */
10#include <linux/kernel.h>
11#include <linux/console.h>
12#include <linux/printk.h>
13#include <linux/init.h>
14
15#include <asm/setup.h>
16
17extern void prom_putchar(char);
18
19static void early_console_write(struct console *con, const char *s, unsigned n)
20{
21	while (n-- && *s) {
22		if (*s == '\n')
23			prom_putchar('\r');
24		prom_putchar(*s);
25		s++;
26	}
27}
28
29static struct console early_console_prom = {
30	.name	= "early",
31	.write	= early_console_write,
32	.flags	= CON_PRINTBUFFER | CON_BOOT,
33	.index	= -1
34};
35
36void __init setup_early_printk(void)
37{
38	if (early_console)
39		return;
40	early_console = &early_console_prom;
41
42	register_console(&early_console_prom);
43}
44