/*
 *  Copyright (C) 2005-2007  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *   
 *
 *  $Id: dev_prep.c,v 1.11 2007/06/15 19:57:33 debug Exp $
 *
 *  COMMENT: PReP machine mainbus (ISA bus + interrupt controller)
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "bus_isa.h"
#include "cpu.h"
#include "device.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"


struct prep_data {
	uint32_t		int_status;
};


DEVICE_ACCESS(prep)
{
	/*  struct prep_data *d = extra;  */
	uint64_t idata = 0, odata = 0;

	if (writeflag == MEM_WRITE)
		idata = memory_readmax64(cpu, data, len);

	if (writeflag == MEM_READ) {
		odata = cpu->machine->isa_pic_data.last_int;
	} else {
		fatal("[ prep: write to interrupt register? ]\n");
	}

	if (writeflag == MEM_READ)
		memory_writemax64(cpu, data, len, odata);

	return 1;
}


DEVINIT(prep)
{
	struct prep_data *d;

	CHECK_ALLOCATION(d = malloc(sizeof(struct prep_data)));
	memset(d, 0, sizeof(struct prep_data));

	memory_device_register(devinit->machine->memory, devinit->name,
	    0xbffff000, 0x1000, dev_prep_access, d, DM_DEFAULT, NULL);

	/*  This works for at least the IBM 6050:  */
	bus_isa_init(devinit->machine, devinit->interrupt_path,
	    BUS_ISA_IDE0 | BUS_ISA_IDE1, 0x80000000, 0xc0000000);

	return 1;
}