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malta-cmdline.c

/*
 * Carsten Langgaard, carstenl@mips.com
 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
 *
 * This program is free software; you can distribute it and/or modify it
 * under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Kernel command line creation using the prom monitor (YAMON) argc/argv.
 */
#include <linux/init.h>
#include <linux/string.h>

#include <asm/bootinfo.h>

extern int prom_argc;
extern int *_prom_argv;

/*
 * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
 * This macro take care of sign extension.
 */
#define prom_argv(index) ((char *)(long)_prom_argv[(index)])

char * __init prom_getcmdline(void)
{
      return &(arcs_cmdline[0]);
}


void  __init prom_init_cmdline(void)
{
      char *cp;
      int actr;

      actr = 1; /* Always ignore argv[0] */

      cp = &(arcs_cmdline[0]);
      while(actr < prom_argc) {
              strcpy(cp, prom_argv(actr));
            cp += strlen(prom_argv(actr));
            *cp++ = ' ';
            actr++;
      }
      if (cp != &(arcs_cmdline[0])) {
            /* get rid of trailing space */
            --cp;
            *cp = '\0';
      }
}

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