/arch/mips/loongson/common/cmdline.c

 1/*
 2 * Based on Ocelot Linux port, which is
 3 * Copyright 2001 MontaVista Software Inc.
 4 * Author: jsun@mvista.com or jsun@junsun.net
 5 *
 6 * Copyright 2003 ICT CAS
 7 * Author: Michael Guo <guoyi@ict.ac.cn>
 8 *
 9 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
10 * Author: Fuxin Zhang, zhangfx@lemote.com
11 *
12 * Copyright (C) 2009 Lemote Inc.
13 * Author: Wu Zhangjin, wuzhangjin@gmail.com
14 *
15 * This program is free software; you can redistribute  it and/or modify it
16 * under  the terms of  the GNU General  Public License as published by the
17 * Free Software Foundation;  either version 2 of the  License, or (at your
18 * option) any later version.
19 */
20#include <asm/bootinfo.h>
21
22#include <loongson.h>
23
24void __init prom_init_cmdline(void)
25{
26	int prom_argc;
27	/* pmon passes arguments in 32bit pointers */
28	int *_prom_argv;
29	int i;
30	long l;
31
32	/* firmware arguments are initialized in head.S */
33	prom_argc = fw_arg0;
34	_prom_argv = (int *)fw_arg1;
35
36	/* arg[0] is "g", the rest is boot parameters */
37	arcs_cmdline[0] = '\0';
38	for (i = 1; i < prom_argc; i++) {
39		l = (long)_prom_argv[i];
40		if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
41		    >= sizeof(arcs_cmdline))
42			break;
43		strcat(arcs_cmdline, ((char *)l));
44		strcat(arcs_cmdline, " ");
45	}
46
47	if ((strstr(arcs_cmdline, "console=")) == NULL)
48		strcat(arcs_cmdline, " console=ttyS0,115200");
49	if ((strstr(arcs_cmdline, "root=")) == NULL)
50		strcat(arcs_cmdline, " root=/dev/hda1");
51
52	prom_init_machtype();
53}