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/* $Id: bootstr.c,v 1.1.1.1 2004-04-15 01:33:55 phoenix Exp $

 * bootstr.c:  Boot string/argument acquisition from the PROM.

 *

 * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)

 * Copyright(C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)

 */

#include <linux/string.h>

#include <linux/init.h>

#include <asm/oplib.h>

/* WARNING: The boot loader knows that these next three variables come one right

 *          after another in the .data section.  Do not move this stuff into

 *          the .bss section or it will break things.

 */

#define BARG_LEN  256

struct {

        int bootstr_len;

        int bootstr_valid;

        char bootstr_buf[BARG_LEN];

} bootstr_info = {

        .bootstr_len = BARG_LEN,

};

char * __init

prom_getbootargs(void)

{

        /* This check saves us from a panic when bootfd patches args. */

        if (bootstr_info.bootstr_valid)

                return bootstr_info.bootstr_buf;

        prom_getstring(prom_chosen_node, "bootargs",

                       bootstr_info.bootstr_buf, BARG_LEN);

        bootstr_info.bootstr_valid = 1;

        return bootstr_info.bootstr_buf;

}