init.c

LINUX 2.6.17.4的源码

/*
 *
 * BRIEF MODULE DESCRIPTION
 *	4G Systems MTX-1 board setup
 *
 * Copyright 2003 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	[e-mail] or [e-mail]
 *         Bruno Randolf <[e-mail]>
 *
 *  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.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>

int prom_argc;
char **prom_argv, **prom_envp;
extern void  __init prom_init_cmdline(void);
extern char *prom_getenv(char *envname);

const char *get_system_type(void)
{
	return "MTX-1";
}

void __init prom_init(void)
{
	unsigned char *memsize_str;
	unsigned long memsize;

	prom_argc = fw_arg0;
	prom_argv = (char **) fw_arg1;
	prom_envp = (char **) fw_arg2;

	mips_machgroup = MACH_GROUP_ALCHEMY;
	mips_machtype = MACH_MTX1;	/* set the platform # */

	prom_init_cmdline();

	memsize_str = prom_getenv("memsize");
	if (!memsize_str)
		memsize = 0x04000000;
	else
		memsize = simple_strtol(memsize_str, NULL, 0);
	add_memory_region(0, memsize, BOOT_MEM_RAM);
}