src/devices/dev_mk48txx.c

/*
 *  Copyright (C) 2006  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_mk48txx.c,v 1.2 2006/02/09 20:02:59 debug Exp $
 *
 *  Mostek MK48Txx Real Time Clock.
 *
 *  TODO: Actually implement it. This is just enough to fool NetBSD/mvmeppc
 *        into thinking that the clock exists.
 */

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

#include "cpu.h"
#include "device.h"
#include "devices.h"
#include "emul.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"


#include "mk48txxreg.h"


#define MK48TXX_LEN             16

struct mk48txx_data {
        unsigned char   reg[MK48TXX_LEN];
};


/*
 *  dev_mk48txx_access():
 */
DEVICE_ACCESS(mk48txx)
{
        struct mk48txx_data *d = (struct mk48txx_data *) extra;
        uint64_t idata = 0, odata = 0;

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

        switch (relative_addr) {

        case MK48TXX_ICSR:
                if (writeflag == MEM_READ)
                        odata = d->reg[relative_addr];
                else
                        d->reg[relative_addr] = idata;
                break;

        case MK48TXX_ISEC:
{
/*  TODO: this is just a hack for NetBSD/mvmeppc mkclock detection :(  */
static int x = 0;
odata = x >> 1;
x++;
}
                break;

        default:if (writeflag == MEM_READ)
                        fatal("[ mk48txx: unimplemented READ from offset %i ]"
                            "\n", (int)relative_addr);
                else
                        fatal("[ mk48txx: unimplemented WRITE to offset %i: "
                            "0x%x ]\n", (int)relative_addr, (int)idata);
        }

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

        return 1;
}


DEVINIT(mk48txx)
{
        struct mk48txx_data *d = malloc(sizeof(struct mk48txx_data));
        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct mk48txx_data));

        memory_device_register(devinit->machine->memory, devinit->name,
            devinit->addr, MK48TXX_LEN, dev_mk48txx_access, (void *)d,
            DM_DEFAULT, NULL);

        return 1;
}

1	/*
2	* Copyright (C) 2006 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_mk48txx.c,v 1.2 2006/02/09 20:02:59 debug Exp $
29	*
30	* Mostek MK48Txx Real Time Clock.
31	*
32	* TODO: Actually implement it. This is just enough to fool NetBSD/mvmeppc
33	* into thinking that the clock exists.
34	*/
35
36	#include <stdio.h>
37	#include <stdlib.h>
38	#include <string.h>
39
40	#include "cpu.h"
41	#include "device.h"
42	#include "devices.h"
43	#include "emul.h"
44	#include "machine.h"
45	#include "memory.h"
46	#include "misc.h"
47
48
49	#include "mk48txxreg.h"
50
51
52	#define MK48TXX_LEN 16
53
54	struct mk48txx_data {
55	unsigned char reg[MK48TXX_LEN];
56	};
57
58
59	/*
60	* dev_mk48txx_access():
61	*/
62	DEVICE_ACCESS(mk48txx)
63	{
64	struct mk48txx_data d = (struct mk48txx_data ) extra;
65	uint64_t idata = 0, odata = 0;
66
67	if (writeflag == MEM_WRITE)
68	idata = memory_readmax64(cpu, data, len);
69
70	switch (relative_addr) {
71
72	case MK48TXX_ICSR:
73	if (writeflag == MEM_READ)
74	odata = d->reg[relative_addr];
75	else
76	d->reg[relative_addr] = idata;
77	break;
78
79	case MK48TXX_ISEC:
80	{
81	/* TODO: this is just a hack for NetBSD/mvmeppc mkclock detection :( */
82	static int x = 0;
83	odata = x >> 1;
84	x++;
85	}
86	break;
87
88	default:if (writeflag == MEM_READ)
89	fatal("[ mk48txx: unimplemented READ from offset %i ]"
90	"\n", (int)relative_addr);
91	else
92	fatal("[ mk48txx: unimplemented WRITE to offset %i: "
93	"0x%x ]\n", (int)relative_addr, (int)idata);
94	}
95
96	if (writeflag == MEM_READ)
97	memory_writemax64(cpu, data, len, odata);
98
99	return 1;
100	}
101
102
103	DEVINIT(mk48txx)
104	{
105	struct mk48txx_data *d = malloc(sizeof(struct mk48txx_data));
106	if (d == NULL) {
107	fprintf(stderr, "out of memory\n");
108	exit(1);
109	}
110	memset(d, 0, sizeof(struct mk48txx_data));
111
112	memory_device_register(devinit->machine->memory, devinit->name,
113	devinit->addr, MK48TXX_LEN, dev_mk48txx_access, (void *)d,
114	DM_DEFAULT, NULL);
115
116	return 1;
117	}
118