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/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * cmdline.c: Kernel command line creation using ARCS argc/argv.

 *

 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)

 */

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <asm/sgialib.h>

#include <asm/bootinfo.h>

#undef DEBUG_CMDLINE

char arcs_cmdline[CL_SIZE];

char * __init prom_getcmdline(void)

{

        return arcs_cmdline;

}

static char *ignored[] = {

        "ConsoleIn=",

        "ConsoleOut=",

        "SystemPartition=",

        "OSLoader=",

        "OSLoadPartition=",

        "OSLoadFilename=",

        "OSLoadOptions="

};

static char *used_arc[][2] = {

        { "OSLoadPartition=", "root=" },

        { "OSLoadOptions=", "" }

};

static char * __init move_firmware_args(char* cp)

{

        char *s;

        int actr, i;

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

        while (actr < prom_argc) {

                for(i = 0; i < ARRAY_SIZE(used_arc); i++) {

                        int len = strlen(used_arc[i][0]);

                        if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {

                        /* Ok, we want it. First append the replacement... */

                                strcat(cp, used_arc[i][1]);

                                cp += strlen(used_arc[i][1]);

                                /* ... and now the argument */

                                s = strstr(prom_argv(actr), "=");

                                if (s) {

                                        s++;

                                        strcpy(cp, s);

                                        cp += strlen(s);

                                }

                                *cp++ = ' ';

                                break;

                        }

                }

                actr++;

        }

        return cp;

}

void __init prom_init_cmdline(void)

{

        char *cp;

        int actr, i;

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

        cp = arcs_cmdline;

        /*

         * Move ARC variables to the beginning to make sure they can be

         * overridden by later arguments.

         */

        cp = move_firmware_args(cp);

        while (actr < prom_argc) {

                for (i = 0; i < ARRAY_SIZE(ignored); i++) {

                        int len = strlen(ignored[i]);

                        if (!strncmp(prom_argv(actr), ignored[i], len))

                                goto pic_cont;

                }

                /* Ok, we want it. */

                strcpy(cp, prom_argv(actr));

                cp += strlen(prom_argv(actr));

                *cp++ = ' ';

        pic_cont:

                actr++;

        }

        if (cp != arcs_cmdline)         /* get rid of trailing space */

                --cp;

        *cp = '\0';

#ifdef DEBUG_CMDLINE

        printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);

#endif

}