/*
 * 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/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>

#include <asm/bootinfo.h>
#include <asm/mips-boards/prom.h>
/*--- #define prom_printf printk ---*/

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


void  __init prom_init_cmdline(void)
{
	char *cp;
	int actr;
    unsigned int test = 0;
#if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8)
    unsigned int root_found = 0;
#endif /*--- #if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8) ---*/

    /*--- prom_printf("[prom_init_cmdline] 1\n"); ---*/
	actr = 1; /* Always ignore argv[0] */

	cp = &(arcs_cmdline[0]);
    /*--- prom_printf("[prom_init_cmdline] 2 prom_argc=%u\n"); ---*/
	while(actr < prom_argc) {
        if(prom_argv(actr) == NULL)
            break;
#if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8)
        if(strstr(prom_argv(actr), "root="))
            root_found = 1;
#endif /*--- #if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8) ---*/
        test++;
        /*--- prom_printf("[prom_init_cmdline] 2.%u next: strcpy(cp=0x%x, prom_argv=0x%x)\n", test, cp, prom_argv(actr)); ---*/
        strcpy(cp, prom_argv(actr));
        /*--- prom_printf("[prom_init_cmdline] 3.%u\n", test); ---*/
        /*--- prom_printf("[prom_init_cmdline] 4.%u cp=%s\n", test, cp); ---*/
		cp += strlen(prom_argv(actr));
		*cp++ = ' ';
		actr++;
        /*--- prom_printf("[prom_init_cmdline] 5.%u\n", test); ---*/
	}
#if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8)
    if(root_found == 0) {
        strcpy(cp, "root=/dev/mtdblock3");
		*cp++ = ' ';
		actr++;
        /*--- prom_printf("[prom_init_cmdline] root added\n"); ---*/
    }
#endif /*--- #if defined(CONFIG_MIPS_OHIO) || defined(CONFIG_MIPS_AR7) || defined(CONFIG_MIPS_UR8) ---*/
    /*--- prom_printf("[prom_init_cmdline] 4\n"); ---*/
	if (cp != &(arcs_cmdline[0])) {
		/* get rid of trailing space */
		--cp;
		*cp = '\0';
	}
    /*--- prom_printf("[prom_init_cmdline] 5\n"); ---*/
}

EXPORT_SYMBOL(prom_getcmdline);