0.3.1/devices/dev_fdc.c

/*
 *  Copyright (C) 2003-2005  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_fdc.c,v 1.9 2005/02/24 15:38:34 debug Exp $
 *  
 *  Floppy controller.
 *
 *  TODO!  (This is just a dummy skeleton right now.)
 */

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

#include "console.h"
#include "device.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"


#define DEV_FDC_LENGTH          0x100


struct fdc_data {
        unsigned char   reg[DEV_FDC_LENGTH];
        int             irqnr;
};


/*
 *  dev_fdc_access():
 */
int dev_fdc_access(struct cpu *cpu, struct memory *mem,
        uint64_t relative_addr, unsigned char *data, size_t len,
        int writeflag, void *extra)
{
        uint64_t idata = 0, odata = 0;
        int i;
        struct fdc_data *d = extra;

        idata = memory_readmax64(cpu, data, len);

        /*  TODO:  this is 100% dummy  */

        switch (relative_addr) {
        case 0x04:
                /*  no debug warning  */
                if (writeflag==MEM_READ) {
                        odata = d->reg[relative_addr];
                } else
                        d->reg[relative_addr] = idata;
                break;
        default:
                if (writeflag==MEM_READ) {
                        debug("[ fdc: read from reg %i ]\n",
                            (int)relative_addr);
                        odata = d->reg[relative_addr];
                } else {
                        debug("[ fdc: write to reg %i:", (int)relative_addr);
                        for (i=0; i<len; i++)
                                debug(" %02x", data[i]);
                        debug(" ]\n");
                        d->reg[relative_addr] = idata;
                }
        }

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

        return 1;
}


/*
 *  devinit_fdc():
 */
int devinit_fdc(struct devinit *devinit)
{
        struct fdc_data *d;

        d = malloc(sizeof(struct fdc_data));
        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct fdc_data));
        d->irqnr = devinit->irq_nr;

        memory_device_register(devinit->machine->memory, devinit->name,
            devinit->addr, DEV_FDC_LENGTH, dev_fdc_access, d,
            MEM_DEFAULT, NULL);

        return 1;
}

1	dpavlin	2	/*
2			* Copyright (C) 2003-2005 Anders Gavare. All rights reserved.
3			*
4			* Redistribution and use in source and binary forms, with or without
5			* modification, are permitted provided that the following conditions are met:
6			*
7			* 1. Redistributions of source code must retain the above copyright
8			* notice, this list of conditions and the following disclaimer.
9			* 2. Redistributions in binary form must reproduce the above copyright
10			* notice, this list of conditions and the following disclaimer in the
11			* documentation and/or other materials provided with the distribution.
12			* 3. The name of the author may not be used to endorse or promote products
13			* derived from this software without specific prior written permission.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*
27			*
28			* $Id: dev_fdc.c,v 1.9 2005/02/24 15:38:34 debug Exp $
29			*
30			* Floppy controller.
31			*
32			* TODO! (This is just a dummy skeleton right now.)
33			*/
34
35			#include <stdio.h>
36			#include <stdlib.h>
37			#include <string.h>
38
39			#include "console.h"
40			#include "device.h"
41			#include "machine.h"
42			#include "memory.h"
43			#include "misc.h"
44
45
46			#define DEV_FDC_LENGTH 0x100
47
48
49			struct fdc_data {
50			unsigned char reg[DEV_FDC_LENGTH];
51			int irqnr;
52			};
53
54
55			/*
56			* dev_fdc_access():
57			*/
58			int dev_fdc_access(struct cpu cpu, struct memory mem,
59			uint64_t relative_addr, unsigned char *data, size_t len,
60			int writeflag, void *extra)
61			{
62			uint64_t idata = 0, odata = 0;
63			int i;
64			struct fdc_data *d = extra;
65
66			idata = memory_readmax64(cpu, data, len);
67
68			/* TODO: this is 100% dummy */
69
70			switch (relative_addr) {
71			case 0x04:
72			/* no debug warning */
73			if (writeflag==MEM_READ) {
74			odata = d->reg[relative_addr];
75			} else
76			d->reg[relative_addr] = idata;
77			break;
78			default:
79			if (writeflag==MEM_READ) {
80			debug("[ fdc: read from reg %i ]\n",
81			(int)relative_addr);
82			odata = d->reg[relative_addr];
83			} else {
84			debug("[ fdc: write to reg %i:", (int)relative_addr);
85			for (i=0; i<len; i++)
86			debug(" %02x", data[i]);
87			debug(" ]\n");
88			d->reg[relative_addr] = idata;
89			}
90			}
91
92			if (writeflag == MEM_READ)
93			memory_writemax64(cpu, data, len, odata);
94
95			return 1;
96			}
97
98
99			/*
100			* devinit_fdc():
101			*/
102			int devinit_fdc(struct devinit *devinit)
103			{
104			struct fdc_data *d;
105
106			d = malloc(sizeof(struct fdc_data));
107			if (d == NULL) {
108			fprintf(stderr, "out of memory\n");
109			exit(1);
110			}
111			memset(d, 0, sizeof(struct fdc_data));
112			d->irqnr = devinit->irq_nr;
113
114			memory_device_register(devinit->machine->memory, devinit->name,
115			devinit->addr, DEV_FDC_LENGTH, dev_fdc_access, d,
116			MEM_DEFAULT, NULL);
117
118			return 1;
119			}
120