Viewing file:  cmdline.c (2.01 KB) -rw-r--r--
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/*
* cmdline.c: Kernel command line creation using ARCS argc/argv.
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <asm/sgialib.h>
#include <asm/bootinfo.h>
#undef DEBUG_CMDLINE
char arcs_cmdline[COMMAND_LINE_SIZE];
char * __init prom_getcmdline(void)
{
return &(arcs_cmdline[0]);
}
static char *ignored[] = {
"ConsoleIn=",
"ConsoleOut=",
"SystemPartition=",
"OSLoader=",
"OSLoadPartition=",
"OSLoadFilename=",
"OSLoadOptions="
};
#define NENTS(foo) ((sizeof((foo)) / (sizeof((foo[0])))))
static char *used_arc[][2] = {
{ "OSLoadPartition=", "root=" },
{ "OSLoadOptions=", "" }
};
static char * __init move_firmware_args(char* cp)
{
char *s;
int actr, i;
actr = 1; /* Always ignore argv[0] */
while (actr < prom_argc) {
for(i = 0; i < NENTS(used_arc); i++) {
int len = strlen(used_arc[i][0]);
if(!strncmp(prom_argv[actr], used_arc[i][0], len)) {
/* Ok, we want it. First append the replacement... */
strcat(cp, used_arc[i][1]);
cp += strlen(used_arc[i][1]);
/* ... and now the argument */
s = strstr(prom_argv[actr], "=");
if(s) {
s++;
strcpy(cp, s);
cp += strlen(s);
}
*cp++ = ' ';
break;
}
}
actr++;
}
return cp;
}
void __init prom_init_cmdline(void)
{
char *cp;
int actr, i;
actr = 1; /* Always ignore argv[0] */
cp = &(arcs_cmdline[0]);
/*
* Move ARC variables to the beginning to make sure they can be
* overridden by later arguments.
*/
cp = move_firmware_args(cp);
while (actr < prom_argc) {
for (i = 0; i < NENTS(ignored); i++) {
int len = strlen(ignored[i]);
if(!strncmp(prom_argv[actr], ignored[i], len))
goto pic_cont;
}
/* Ok, we want it. */
strcpy(cp, prom_argv[actr]);
cp += strlen(prom_argv[actr]);
*cp++ = ' ';
pic_cont:
actr++;
}
if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
--cp;
*cp = '\0';
#ifdef DEBUG_CMDLINE
prom_printf("prom_init_cmdline: %s\n", &(arcs_cmdline[0]));
#endif
}
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