blob: 916831da7e67327c818da9a0ec864aabb5411a4c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* 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 <linux/init.h>
#define BARG_LEN 256
static char barg_buf[BARG_LEN] = { 0 };
static char fetched __initdata = 0;
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:
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;
}
|
