mirror of https://gitee.com/openkylin/linux.git
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* Based on Ocelot Linux port, which is
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* Copyright 2001 MontaVista Software Inc.
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* Author: jsun@mvista.com or jsun@junsun.net
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*
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* Copyright 2003 ICT CAS
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* Author: Michael Guo <guoyi@ict.ac.cn>
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*
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* Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <asm/bootinfo.h>
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extern unsigned long bus_clock;
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extern unsigned long cpu_clock_freq;
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extern unsigned int memsize, highmemsize;
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extern int putDebugChar(unsigned char byte);
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static int argc;
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/* pmon passes arguments in 32bit pointers */
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static int *arg;
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static int *env;
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const char *get_system_type(void)
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{
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return "lemote-fulong";
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}
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void __init prom_init_cmdline(void)
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{
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int i;
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long l;
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/* arg[0] is "g", the rest is boot parameters */
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arcs_cmdline[0] = '\0';
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for (i = 1; i < argc; i++) {
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l = (long)arg[i];
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if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
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>= sizeof(arcs_cmdline))
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break;
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strcat(arcs_cmdline, ((char *)l));
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strcat(arcs_cmdline, " ");
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}
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}
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void __init prom_init(void)
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{
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long l;
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argc = fw_arg0;
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arg = (int *)fw_arg1;
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env = (int *)fw_arg2;
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mips_machtype = MACH_LEMOTE_FULONG;
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prom_init_cmdline();
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if ((strstr(arcs_cmdline, "console=")) == NULL)
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strcat(arcs_cmdline, " console=ttyS0,115200");
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if ((strstr(arcs_cmdline, "root=")) == NULL)
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strcat(arcs_cmdline, " root=/dev/hda1");
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#define parse_even_earlier(res, option, p) \
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do { \
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if (strncmp(option, (char *)p, strlen(option)) == 0) \
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res = simple_strtol((char *)p + strlen(option"="), \
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NULL, 10); \
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} while (0)
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l = (long)*env;
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while (l != 0) {
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parse_even_earlier(bus_clock, "busclock", l);
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parse_even_earlier(cpu_clock_freq, "cpuclock", l);
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parse_even_earlier(memsize, "memsize", l);
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parse_even_earlier(highmemsize, "highmemsize", l);
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env++;
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l = (long)*env;
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}
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if (memsize == 0)
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memsize = 256;
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pr_info("busclock=%ld, cpuclock=%ld,memsize=%d,highmemsize=%d\n",
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bus_clock, cpu_clock_freq, memsize, highmemsize);
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}
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void __init prom_free_prom_memory(void)
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{
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}
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void prom_putchar(char c)
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{
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putDebugChar(c);
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}
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