arch/mips/mti-sead3/sead3-cmdline.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
   7  */
   8 #include <linux/init.h>
   9 #include <linux/string.h>
  10
  11 #include <asm/bootinfo.h>
  12
  13 extern int prom_argc;
  14 extern int *_prom_argv;
  15
  16 /*
  17  * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
  18  * This macro take care of sign extension.
  19  */
  20 #define prom_argv(index) ((char *)(long)_prom_argv[(index)])
  21
  22 char * __init prom_getcmdline(void)
  23 {
  24         return &(arcs_cmdline[0]);
  25 }
  26
  27 void  __init prom_init_cmdline(void)
  28 {
  29         char *cp;
  30         int actr;
  31
  32         actr = 1; /* Always ignore argv[0] */
  33
  34         cp = &(arcs_cmdline[0]);
  35         while (actr < prom_argc) {
  36                 strcpy(cp, prom_argv(actr));
  37                 cp += strlen(prom_argv(actr));
  38                 *cp++ = ' ';
  39                 actr++;
  40         }
  41         if (cp != &(arcs_cmdline[0])) {
  42                 /* get rid of trailing space */
  43                 --cp;
  44                 *cp = '\0';
  45         }
  46 }