LXR linux/arch/powerpc/boot/ofconsole.c

   1/*
   2 * OF console routines
   3 *
   4 * Copyright (C) Paul Mackerras 1997.
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11#include <stddef.h>
  12#include "types.h"
  13#include "elf.h"
  14#include "string.h"
  15#include "stdio.h"
  16#include "page.h"
  17#include "ops.h"
  18
  19#include "of.h"
  20
  21static unsigned int of_stdout_handle;
  22
  23static int of_console_open(void)
  24{
  25        void *devp;
  26
  27        if (((devp = of_finddevice("/chosen")) != NULL)
  28            && (of_getprop(devp, "stdout", &of_stdout_handle,
  29                           sizeof(of_stdout_handle))
  30                == sizeof(of_stdout_handle))) {
  31                of_stdout_handle = be32_to_cpu(of_stdout_handle);
  32                return 0;
  33        }
  34
  35        return -1;
  36}
  37
  38static void of_console_write(const char *buf, int len)
  39{
  40        of_call_prom("write", 3, 1, of_stdout_handle, buf, len);
  41}
  42
  43void of_console_init(void)
  44{
  45        console_ops.open = of_console_open;
  46        console_ops.write = of_console_write;
  47}
  48