src/devices/dev_pccmos.c

/*
 *  Copyright (C) 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_pccmos.c,v 1.3 2005/05/20 08:59:58 debug Exp $
 *  
 *  PC CMOS/RTC device.
 *
 *  This is mostly bogus.
 */

#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"


#define DEV_PCCMOS_LENGTH               2
#define PCCMOS_MC146818_FAKE_ADDR       0x1d00000000ULL

struct pccmos_data {
        unsigned char   select;
        unsigned char   ram[256];
};


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

        idata = memory_readmax64(cpu, data, len);

        switch (relative_addr) {
        case 0: if (writeflag == MEM_WRITE) {
                        d->select = idata;
                        if (idata <= 0x0d)
                                cpu->memory_rw(cpu, cpu->mem,
                                    PCCMOS_MC146818_FAKE_ADDR, data, 1,
                                    MEM_WRITE, PHYSICAL);
                } else
                        odata = d->select;
                break;
        case 1: if (d->select <= 0x0d) {
                        if (writeflag == MEM_WRITE)
                                cpu->memory_rw(cpu, cpu->mem,
                                    PCCMOS_MC146818_FAKE_ADDR + 1, data, 1,
                                    MEM_WRITE, PHYSICAL);
                        else
                                cpu->memory_rw(cpu, cpu->mem,
                                    PCCMOS_MC146818_FAKE_ADDR + 1, data, 1,
                                    MEM_READ, PHYSICAL);
                        return 1;
                } else {
                        if (writeflag == MEM_WRITE)
                                d->ram[d->select] = idata;
                        else
                                odata = d->ram[d->select];
                }
                break;
        default:
                if (writeflag == MEM_WRITE) {
                        fatal("[ pccmos: unimplemented write to address 0x%x"
                            " data=0x%02x ]\n", (int)relative_addr, (int)idata);
                } else {
                        fatal("[ pccmos: unimplemented read from address 0x%x "
                            "]\n", (int)relative_addr);
                }
        }

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

        return 1;
}


/*
 *  devinit_pccmos():
 */
int devinit_pccmos(struct devinit *devinit)
{
        struct pccmos_data *d = malloc(sizeof(struct pccmos_data));

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

        memory_device_register(devinit->machine->memory, devinit->name,
            devinit->addr, DEV_PCCMOS_LENGTH, dev_pccmos_access, (void *)d,
            MEM_DEFAULT, NULL);

        dev_mc146818_init(devinit->machine, devinit->machine->memory,
            PCCMOS_MC146818_FAKE_ADDR, 16  /*  NOTE/TODO: No irq  */,
            MC146818_PC_CMOS, 1);

        return 1;
}

1	/*
2	* Copyright (C) 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_pccmos.c,v 1.3 2005/05/20 08:59:58 debug Exp $
29	*
30	* PC CMOS/RTC device.
31	*
32	* This is mostly bogus.
33	*/
34
35	#include <stdio.h>
36	#include <stdlib.h>
37	#include <string.h>
38
39	#include "cpu.h"
40	#include "device.h"
41	#include "devices.h"
42	#include "emul.h"
43	#include "machine.h"
44	#include "memory.h"
45	#include "misc.h"
46
47
48	#define DEV_PCCMOS_LENGTH 2
49	#define PCCMOS_MC146818_FAKE_ADDR 0x1d00000000ULL
50
51	struct pccmos_data {
52	unsigned char select;
53	unsigned char ram[256];
54	};
55
56
57	/*
58	* dev_pccmos_access():
59	*/
60	int dev_pccmos_access(struct cpu cpu, struct memory mem,
61	uint64_t relative_addr, unsigned char *data, size_t len,
62	int writeflag, void *extra)
63	{
64	struct pccmos_data d = (struct pccmos_data ) extra;
65	uint64_t idata = 0, odata = 0;
66
67	idata = memory_readmax64(cpu, data, len);
68
69	switch (relative_addr) {
70	case 0: if (writeflag == MEM_WRITE) {
71	d->select = idata;
72	if (idata <= 0x0d)
73	cpu->memory_rw(cpu, cpu->mem,
74	PCCMOS_MC146818_FAKE_ADDR, data, 1,
75	MEM_WRITE, PHYSICAL);
76	} else
77	odata = d->select;
78	break;
79	case 1: if (d->select <= 0x0d) {
80	if (writeflag == MEM_WRITE)
81	cpu->memory_rw(cpu, cpu->mem,
82	PCCMOS_MC146818_FAKE_ADDR + 1, data, 1,
83	MEM_WRITE, PHYSICAL);
84	else
85	cpu->memory_rw(cpu, cpu->mem,
86	PCCMOS_MC146818_FAKE_ADDR + 1, data, 1,
87	MEM_READ, PHYSICAL);
88	return 1;
89	} else {
90	if (writeflag == MEM_WRITE)
91	d->ram[d->select] = idata;
92	else
93	odata = d->ram[d->select];
94	}
95	break;
96	default:
97	if (writeflag == MEM_WRITE) {
98	fatal("[ pccmos: unimplemented write to address 0x%x"
99	" data=0x%02x ]\n", (int)relative_addr, (int)idata);
100	} else {
101	fatal("[ pccmos: unimplemented read from address 0x%x "
102	"]\n", (int)relative_addr);
103	}
104	}
105
106	if (writeflag == MEM_READ)
107	memory_writemax64(cpu, data, len, odata);
108
109	return 1;
110	}
111
112
113	/*
114	* devinit_pccmos():
115	*/
116	int devinit_pccmos(struct devinit *devinit)
117	{
118	struct pccmos_data *d = malloc(sizeof(struct pccmos_data));
119
120	if (d == NULL) {
121	fprintf(stderr, "out of memory\n");
122	exit(1);
123	}
124	memset(d, 0, sizeof(struct pccmos_data));
125
126	memory_device_register(devinit->machine->memory, devinit->name,
127	devinit->addr, DEV_PCCMOS_LENGTH, dev_pccmos_access, (void *)d,
128	MEM_DEFAULT, NULL);
129
130	dev_mc146818_init(devinit->machine, devinit->machine->memory,
131	PCCMOS_MC146818_FAKE_ADDR, 16 /* NOTE/TODO: No irq */,
132	MC146818_PC_CMOS, 1);
133
134	return 1;
135	}
136