Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * DECstation PROM-based early console support. |
3 | * | |
36de48de | 4 | * Copyright (C) 2004, 2007 Maciej W. Rozycki |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | #include <linux/console.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/kernel.h> | |
36de48de | 14 | #include <linux/string.h> |
1da177e4 LT |
15 | |
16 | #include <asm/dec/prom.h> | |
17 | ||
36de48de MR |
18 | static void __init prom_console_write(struct console *con, const char *s, |
19 | unsigned int c) | |
1da177e4 | 20 | { |
36de48de MR |
21 | char buf[81]; |
22 | unsigned int chunk = sizeof(buf) - 1; | |
1da177e4 | 23 | |
36de48de MR |
24 | while (c > 0) { |
25 | if (chunk > c) | |
26 | chunk = c; | |
27 | memcpy(buf, s, chunk); | |
28 | buf[chunk] = '\0'; | |
29 | prom_printf("%s", buf); | |
30 | s += chunk; | |
31 | c -= chunk; | |
32 | } | |
33 | } | |
34 | ||
35 | static struct console promcons __initdata = { | |
36 | .name = "prom", | |
37 | .write = prom_console_write, | |
38 | .flags = CON_BOOT | CON_PRINTBUFFER, | |
39 | .index = -1, | |
40 | }; | |
1da177e4 | 41 | |
36de48de MR |
42 | void __init register_prom_console(void) |
43 | { | |
44 | register_console(&promcons); | |
1da177e4 | 45 | } |