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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc/prom/bootstr.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sparc/prom/bootstr.c')
-rw-r--r--arch/sparc/prom/bootstr.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/sparc/prom/bootstr.c b/arch/sparc/prom/bootstr.c
new file mode 100644
index 000000000000..cfdeac2788d1
--- /dev/null
+++ b/arch/sparc/prom/bootstr.c
@@ -0,0 +1,63 @@
1/* $Id: bootstr.c,v 1.20 2000/02/08 20:24:23 davem Exp $
2 * bootstr.c: Boot string/argument acquisition from the PROM.
3 *
4 * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#include <linux/string.h>
8#include <asm/oplib.h>
9#include <asm/sun4prom.h>
10#include <linux/init.h>
11
12#define BARG_LEN 256
13static char barg_buf[BARG_LEN] = { 0 };
14static char fetched __initdata = 0;
15
16extern linux_sun4_romvec *sun4_romvec;
17
18char * __init
19prom_getbootargs(void)
20{
21 int iter;
22 char *cp, *arg;
23
24 /* This check saves us from a panic when bootfd patches args. */
25 if (fetched) {
26 return barg_buf;
27 }
28
29 switch(prom_vers) {
30 case PROM_V0:
31 case PROM_SUN4:
32 cp = barg_buf;
33 /* Start from 1 and go over fd(0,0,0)kernel */
34 for(iter = 1; iter < 8; iter++) {
35 arg = (*(romvec->pv_v0bootargs))->argv[iter];
36 if(arg == 0) break;
37 while(*arg != 0) {
38 /* Leave place for space and null. */
39 if(cp >= barg_buf + BARG_LEN-2){
40 /* We might issue a warning here. */
41 break;
42 }
43 *cp++ = *arg++;
44 }
45 *cp++ = ' ';
46 }
47 *cp = 0;
48 break;
49 case PROM_V2:
50 case PROM_V3:
51 /*
52 * V3 PROM cannot supply as with more than 128 bytes
53 * of an argument. But a smart bootstrap loader can.
54 */
55 strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf));
56 break;
57 default:
58 break;
59 }
60
61 fetched = 1;
62 return barg_buf;
63}