mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 00:01:35 +00:00
796756bab6
Signed-off-by: Songmao Tian <tiansm@lemote.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
101 lines
2.4 KiB
C
101 lines
2.4 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
|
|
*
|
|
* 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 <linux/init.h>
|
|
#include <linux/bootmem.h>
|
|
#include <asm/bootinfo.h>
|
|
|
|
extern unsigned long bus_clock;
|
|
extern unsigned long cpu_clock_freq;
|
|
extern unsigned int memsize, highmemsize;
|
|
extern int putDebugChar(unsigned char byte);
|
|
|
|
static int argc;
|
|
/* pmon passes arguments in 32bit pointers */
|
|
static int *arg;
|
|
static int *env;
|
|
|
|
const char *get_system_type(void)
|
|
{
|
|
return "lemote-fulong";
|
|
}
|
|
|
|
void __init prom_init_cmdline(void)
|
|
{
|
|
int i;
|
|
long l;
|
|
|
|
/* arg[0] is "g", the rest is boot parameters */
|
|
arcs_cmdline[0] = '\0';
|
|
for (i = 1; i < argc; i++) {
|
|
l = (long)arg[i];
|
|
if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
|
|
>= sizeof(arcs_cmdline))
|
|
break;
|
|
strcat(arcs_cmdline, ((char *)l));
|
|
strcat(arcs_cmdline, " ");
|
|
}
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
long l;
|
|
argc = fw_arg0;
|
|
arg = (int *)fw_arg1;
|
|
env = (int *)fw_arg2;
|
|
|
|
mips_machgroup = MACH_GROUP_LEMOTE;
|
|
mips_machtype = MACH_LEMOTE_FULONG;
|
|
|
|
prom_init_cmdline();
|
|
|
|
if ((strstr(arcs_cmdline, "console=")) == NULL)
|
|
strcat(arcs_cmdline, " console=ttyS0,115200");
|
|
if ((strstr(arcs_cmdline, "root=")) == NULL)
|
|
strcat(arcs_cmdline, " root=/dev/hda1");
|
|
|
|
#define parse_even_earlier(res, option, p) \
|
|
do { \
|
|
if (strncmp(option, (char *)p, strlen(option)) == 0) \
|
|
res = simple_strtol((char *)p + strlen(option"="), \
|
|
NULL, 10); \
|
|
} while (0)
|
|
|
|
l = (long)*env;
|
|
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);
|
|
env++;
|
|
l = (long)*env;
|
|
}
|
|
if (memsize == 0)
|
|
memsize = 256;
|
|
|
|
pr_info("busclock=%ld, cpuclock=%ld,memsize=%d,highmemsize=%d\n",
|
|
bus_clock, cpu_clock_freq, memsize, highmemsize);
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
}
|
|
|
|
void prom_putchar(char c)
|
|
{
|
|
putDebugChar(c);
|
|
}
|