arch/mips/sgi/prom/cmdline.c

   1 /*
   2  * cmdline.c: Kernel command line creation using ARCS argc/argv.
   3  *
   4  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
   5  *
   6  * $Id: cmdline.c,v 1.3 1998/03/27 08:53:46 ralf Exp $
   7  */
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/string.h>
  11
  12 #include <asm/sgialib.h>
  13 #include <asm/bootinfo.h>
  14
  15 /* #define DEBUG_CMDLINE */
  16
  17 extern char arcs_cmdline[CL_SIZE];
  18
  19 __initfunc(char *prom_getcmdline(void))
  20 {
  21         return &(arcs_cmdline[0]);
  22 }
  23
  24 static char *ignored[] = {
  25         "ConsoleIn=",
  26         "ConsoleOut=",
  27         "SystemPartition=",
  28         "OSLoader=",
  29         "OSLoadPartition=",
  30         "OSLoadFilename="
  31 };
  32 #define NENTS(foo) ((sizeof((foo)) / (sizeof((foo[0])))))
  33
  34 __initfunc(void prom_init_cmdline(void))
  35 {
  36         char *cp;
  37         int actr, i;
  38
  39         actr = 1; /* Always ignore argv[0] */
  40
  41         cp = &(arcs_cmdline[0]);
  42         while(actr < prom_argc) {
  43                 for(i = 0; i < NENTS(ignored); i++) {
  44                         int len = strlen(ignored[i]);
  45
  46                         if(!strncmp(prom_argv[actr], ignored[i], len))
  47                                 goto pic_cont;
  48                 }
  49                 /* Ok, we want it. */
  50                 strcpy(cp, prom_argv[actr]);
  51                 cp += strlen(prom_argv[actr]);
  52                 *cp++ = ' ';
  53
  54         pic_cont:
  55                 actr++;
  56         }
  57         if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
  58                 --cp;
  59         *cp = '\0';
  60
  61 #ifdef DEBUG_CMDLINE
  62         prom_printf("prom_init_cmdline: %s\n", &(arcs_cmdline[0]));
  63 #endif
  64 }