arch/mips/loongson/common/cmdline.c

   1 /*
   2  * Based on Ocelot Linux port, which is
   3  * Copyright 2001 MontaVista Software Inc.
   4  * Author: jsun@mvista.com or jsun@junsun.net
   5  *
   6  * Copyright 2003 ICT CAS
   7  * Author: Michael Guo <guoyi@ict.ac.cn>
   8  *
   9  * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
  10  * Author: Fuxin Zhang, zhangfx@lemote.com
  11  *
  12  * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
  13  * Author: Wu Zhangjin, wuzj@lemote.com
  14  *
  15  * This program is free software; you can redistribute  it and/or modify it
  16  * under  the terms of  the GNU General  Public License as published by the
  17  * Free Software Foundation;  either version 2 of the  License, or (at your
  18  * option) any later version.
  19  */
  20 #include <asm/bootinfo.h>
  21
  22 #include <loongson.h>
  23
  24 int prom_argc;
  25 /* pmon passes arguments in 32bit pointers */
  26 int *_prom_argv;
  27
  28 void __init prom_init_cmdline(void)
  29 {
  30         int i;
  31         long l;
  32
  33         /* firmware arguments are initialized in head.S */
  34         prom_argc = fw_arg0;
  35         _prom_argv = (int *)fw_arg1;
  36
  37         /* arg[0] is "g", the rest is boot parameters */
  38         arcs_cmdline[0] = '\0';
  39         for (i = 1; i < prom_argc; i++) {
  40                 l = (long)_prom_argv[i];
  41                 if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
  42                     >= sizeof(arcs_cmdline))
  43                         break;
  44                 strcat(arcs_cmdline, ((char *)l));
  45                 strcat(arcs_cmdline, " ");
  46         }
  47
  48         if ((strstr(arcs_cmdline, "console=")) == NULL)
  49                 strcat(arcs_cmdline, " console=ttyS0,115200");
  50         if ((strstr(arcs_cmdline, "root=")) == NULL)
  51                 strcat(arcs_cmdline, " root=/dev/hda1");
  52 }