mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
|
/* $Id: bootstr.c,v 1.20 2000/02/08 20:24:23 davem Exp $
|
||
|
|
* bootstr.c: Boot string/argument acquisition from the PROM.
|
||
|
|
*
|
||
|
|
* Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/string.h>
|
||
|
|
#include <asm/oplib.h>
|
||
|
|
#include <asm/sun4prom.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
|
||
|
|
#define BARG_LEN 256
|
||
|
|
static char barg_buf[BARG_LEN] = { 0 };
|
||
|
|
static char fetched __initdata = 0;
|
||
|
|
|
||
|
|
extern linux_sun4_romvec *sun4_romvec;
|
||
|
|
|
||
|
|
char * __init
|
||
|
|
prom_getbootargs(void)
|
||
|
|
{
|
||
|
|
int iter;
|
||
|
|
char *cp, *arg;
|
||
|
|
|
||
|
|
/* This check saves us from a panic when bootfd patches args. */
|
||
|
|
if (fetched) {
|
||
|
|
return barg_buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch(prom_vers) {
|
||
|
|
case PROM_V0:
|
||
|
|
case PROM_SUN4:
|
||
|
|
cp = barg_buf;
|
||
|
|
/* Start from 1 and go over fd(0,0,0)kernel */
|
||
|
|
for(iter = 1; iter < 8; iter++) {
|
||
|
|
arg = (*(romvec->pv_v0bootargs))->argv[iter];
|
||
|
|
if(arg == 0) break;
|
||
|
|
while(*arg != 0) {
|
||
|
|
/* Leave place for space and null. */
|
||
|
|
if(cp >= barg_buf + BARG_LEN-2){
|
||
|
|
/* We might issue a warning here. */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
*cp++ = *arg++;
|
||
|
|
}
|
||
|
|
*cp++ = ' ';
|
||
|
|
}
|
||
|
|
*cp = 0;
|
||
|
|
break;
|
||
|
|
case PROM_V2:
|
||
|
|
case PROM_V3:
|
||
|
|
/*
|
||
|
|
* V3 PROM cannot supply as with more than 128 bytes
|
||
|
|
* of an argument. But a smart bootstrap loader can.
|
||
|
|
*/
|
||
|
|
strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf));
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
fetched = 1;
|
||
|
|
return barg_buf;
|
||
|
|
}
|