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 
early_console_write(struct console * con,const char * s,unsigned n)17 static void early_console_write(struct console *con, const char *s, unsigned n)
18 {
19 	while (n-- && *s) {
20 		if (*s == '\n')
21 			prom_putchar('\r');
22 		prom_putchar(*s);
23 		s++;
24 	}
25 }
26 
27 static struct console early_console_prom = {
28 	.name	= "early",
29 	.write	= early_console_write,
30 	.flags	= CON_PRINTBUFFER | CON_BOOT,
31 	.index	= -1
32 };
33 
setup_early_printk(void)34 void __init setup_early_printk(void)
35 {
36 	if (early_console)
37 		return;
38 	early_console = &early_console_prom;
39 
40 	register_console(&early_console_prom);
41 }
42