LXR linux/arch/um/kernel/early

   1/*
   2 * Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/console.h>
  11#include <linux/init.h>
  12#include <os.h>
  13
  14static void early_console_write(struct console *con, const char *s, unsigned int n)
  15{
  16        um_early_printk(s, n);
  17}
  18
  19static struct console early_console_dev = {
  20        .name = "earlycon",
  21        .write = early_console_write,
  22        .flags = CON_BOOT,
  23        .index = -1,
  24};
  25
  26static int __init setup_early_printk(char *buf)
  27{
  28        if (!early_console) {
  29                early_console = &early_console_dev;
  30                register_console(&early_console_dev);
  31        }
  32        return 0;
  33}
  34
  35early_param("earlyprintk", setup_early_printk);
  36