46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
/*
|
|
* DECstation PROM-based early console support.
|
|
*
|
|
* Copyright (C) 2004, 2007 Maciej W. Rozycki
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <linux/console.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/dec/prom.h>
|
|
|
|
static void __init prom_console_write(struct console *con, const char *s,
|
|
unsigned int c)
|
|
{
|
|
char buf[81];
|
|
unsigned int chunk = sizeof(buf) - 1;
|
|
|
|
while (c > 0) {
|
|
if (chunk > c)
|
|
chunk = c;
|
|
memcpy(buf, s, chunk);
|
|
buf[chunk] = '\0';
|
|
prom_printf("%s", buf);
|
|
s += chunk;
|
|
c -= chunk;
|
|
}
|
|
}
|
|
|
|
static struct console promcons __initdata = {
|
|
.name = "prom",
|
|
.write = prom_console_write,
|
|
.flags = CON_BOOT | CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
void __init register_prom_console(void)
|
|
{
|
|
register_console(&promcons);
|
|
}
|