41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
|
/* $Id: bootstr.c,v 1.6 1999/08/31 06:55:01 davem 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,
|
||
|
|
#ifdef CONFIG_CMDLINE
|
||
|
|
.bootstr_valid = 1,
|
||
|
|
.bootstr_buf = CONFIG_CMDLINE,
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|