1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * DECstation PROM-based early console support.
4 *
5 * Copyright (C) 2004, 2007 Maciej W. Rozycki
6 */
7 #include <linux/console.h>
8 #include <linux/init.h>
9 #include <linux/kernel.h>
10 #include <linux/string.h>
11
12 #include <asm/dec/prom.h>
13
14 static void __init prom_console_write(struct console *con, const char *s,
15 unsigned int c)
16 {
17 char buf[81];
18 unsigned int chunk = sizeof(buf) - 1;
19
20 while (c > 0) {
21 if (chunk > c)
22 chunk = c;
23 memcpy(buf, s, chunk);
24 buf[chunk] = '\0';
25 prom_printf("%s", buf);
26 s += chunk;
27 c -= chunk;
28 }
29 }
30
31 static struct console promcons __initdata = {
32 .name = "prom",
33 .write = prom_console_write,
34 .flags = CON_BOOT | CON_PRINTBUFFER,
35 .index = -1,
36 };
37
38 void __init register_prom_console(void)
39 {
40 register_console(&promcons);
41 }
42
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