1 /*
2 * arch/mips/dec/prom/console.c
3 *
4 * DECstation PROM-based early console support.
5 *
6 * Copyright (C) 2004, 2007 Maciej W. Rozycki
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13 #include <linux/console.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17
18 #include <asm/dec/prom.h>
19
prom_console_write(struct console * con,const char * s,unsigned int c)20 static void __init prom_console_write(struct console *con, const char *s,
21 unsigned int c)
22 {
23 char buf[81];
24 unsigned int chunk = sizeof(buf) - 1;
25
26 while (c > 0) {
27 if (chunk > c)
28 chunk = c;
29 memcpy(buf, s, chunk);
30 buf[chunk] = '\0';
31 prom_printf("%s", buf);
32 s += chunk;
33 c -= chunk;
34 }
35 }
36
37 static struct console promcons __initdata = {
38 .name = "prom",
39 .write = prom_console_write,
40 .flags = CON_BOOT | CON_PRINTBUFFER,
41 .index = -1,
42 };
43
register_prom_console(void)44 void __init register_prom_console(void)
45 {
46 register_console(&promcons);
47 }
48