59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
|
/*
|
||
|
|
* Based on Ocelot Linux port, which is
|
||
|
|
* Copyright 2001 MontaVista Software Inc.
|
||
|
|
* Author: jsun@mvista.com or jsun@junsun.net
|
||
|
|
*
|
||
|
|
* Copyright 2003 ICT CAS
|
||
|
|
* Author: Michael Guo <guoyi@ict.ac.cn>
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
|
||
|
|
* Author: Fuxin Zhang, zhangfx@lemote.com
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
|
||
|
|
* Author: Wu Zhangjin, wuzj@lemote.com
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License as published by the
|
||
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
* option) any later version.
|
||
|
|
*/
|
||
|
|
#include <asm/bootinfo.h>
|
||
|
|
|
||
|
|
#include <loongson.h>
|
||
|
|
|
||
|
|
unsigned long bus_clock, cpu_clock_freq;
|
||
|
|
unsigned long memsize, highmemsize;
|
||
|
|
|
||
|
|
/* pmon passes arguments in 32bit pointers */
|
||
|
|
int *_prom_envp;
|
||
|
|
|
||
|
|
#define parse_even_earlier(res, option, p) \
|
||
|
|
do { \
|
||
|
|
if (strncmp(option, (char *)p, strlen(option)) == 0) \
|
||
|
|
strict_strtol((char *)p + strlen(option"="), \
|
||
|
|
10, &res); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
void __init prom_init_env(void)
|
||
|
|
{
|
||
|
|
long l;
|
||
|
|
|
||
|
|
/* firmware arguments are initialized in head.S */
|
||
|
|
_prom_envp = (int *)fw_arg2;
|
||
|
|
|
||
|
|
l = (long)*_prom_envp;
|
||
|
|
while (l != 0) {
|
||
|
|
parse_even_earlier(bus_clock, "busclock", l);
|
||
|
|
parse_even_earlier(cpu_clock_freq, "cpuclock", l);
|
||
|
|
parse_even_earlier(memsize, "memsize", l);
|
||
|
|
parse_even_earlier(highmemsize, "highmemsize", l);
|
||
|
|
_prom_envp++;
|
||
|
|
l = (long)*_prom_envp;
|
||
|
|
}
|
||
|
|
if (memsize == 0)
|
||
|
|
memsize = 256;
|
||
|
|
|
||
|
|
pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
|
||
|
|
bus_clock, cpu_clock_freq, memsize, highmemsize);
|
||
|
|
}
|