/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * 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 * __init prom_getcmdline(void) { return arcs_cmdline; } static char *ignored[] = { "ConsoleIn=", "ConsoleOut=", "SystemPartition=", "OSLoader=", "OSLoadPartition=", "OSLoadFilename=", "OSLoadOptions=" }; 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 < ARRAY_SIZE(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 = strchr(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; /* * 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 < ARRAY_SIZE(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) /* get rid of trailing space */ --cp; *cp = '\0'; #ifdef DEBUG_CMDLINE printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline); #endif }