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console.c

/*
 *    arch/mips/dec/prom/console.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);
}

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