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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - arch/arm/kernel/early_printk.c
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>
15 extern void printch(int);
17 static void early_write(const char *s
, unsigned n
)
27 static void early_console_write(struct console
*con
, const char *s
, unsigned n
)
32 static struct console early_console
= {
34 .write
= early_console_write
,
35 .flags
= CON_PRINTBUFFER
| CON_BOOT
,
39 asmlinkage
void early_printk(const char *fmt
, ...)
46 n
= vscnprintf(buf
, sizeof(buf
), fmt
, ap
);
51 static int __init
setup_early_printk(char *buf
)
53 register_console(&early_console
);
57 early_param("earlyprintk", setup_early_printk
);