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
14static 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
31static struct console promcons __initdata = {
32	.name	= "prom",
33	.write	= prom_console_write,
34	.flags	= CON_BOOT | CON_PRINTBUFFER,
35	.index	= -1,
36};
37
38void __init register_prom_console(void)
39{
40	register_console(&promcons);
41}
42