0.3.1/devices/dev_colorplanemask.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_colorplanemask.c,v 1.10 2005/02/11 09:53:48 debug Exp $
 *  
 *  Color plane mask used by DECstation 3100.
 *
 *  Just a one-byte thingy, but the way things work now this has to
 *  be a separate device. :-/
 */

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

#include "devices.h"
#include "memory.h"
#include "misc.h"


struct colorplanemask_data {
        unsigned char   *color_plane_mask;
};


/*
 *  dev_colorplanemask_access():
 */
int dev_colorplanemask_access(struct cpu *cpu, struct memory *mem,
        uint64_t relative_addr, unsigned char *data, size_t len,
        int writeflag, void *extra)
{
        struct colorplanemask_data *d = (struct colorplanemask_data *) extra;

        switch (relative_addr) {
        case 0x00:
                if (writeflag == MEM_WRITE) {
                        *d->color_plane_mask = data[0];
                } else {
                        debug("[ colorplanemask: read isn't actually "
                            "supported ]\n");
                        data[0] = *d->color_plane_mask;
                }
                break;
        default:
                if (writeflag == MEM_WRITE) {
                        debug("[ colorplanemask: unimplemented write "
                            "to address 0x%x, data=0x%02x ]\n",
                            (int)relative_addr, data[0]);
                } else {
                        debug("[ colorplanemask: unimplemented read "
                            "from address 0x%x ]\n", (int)relative_addr);
                }
        }

        /*  Pretend it was ok:  */
        return 1;
}


/*
 *  dev_colorplanemask_init():
 */
void dev_colorplanemask_init(struct memory *mem, uint64_t baseaddr,
        unsigned char *color_plane_mask)
{
        struct colorplanemask_data *d =
            malloc(sizeof(struct colorplanemask_data));
        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct colorplanemask_data));
        d->color_plane_mask = color_plane_mask;

        memory_device_register(mem, "colorplanemask", baseaddr,
            DEV_COLORPLANEMASK_LENGTH, dev_colorplanemask_access,
            (void *)d, MEM_DEFAULT, NULL);
}

1	/*
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_colorplanemask.c,v 1.10 2005/02/11 09:53:48 debug Exp $
29	*
30	* Color plane mask used by DECstation 3100.
31	*
32	* Just a one-byte thingy, but the way things work now this has to
33	* be a separate device. :-/
34	*/
35
36	#include <stdio.h>
37	#include <stdlib.h>
38	#include <string.h>
39
40	#include "devices.h"
41	#include "memory.h"
42	#include "misc.h"
43
44
45	struct colorplanemask_data {
46	unsigned char *color_plane_mask;
47	};
48
49
50	/*
51	* dev_colorplanemask_access():
52	*/
53	int dev_colorplanemask_access(struct cpu cpu, struct memory mem,
54	uint64_t relative_addr, unsigned char *data, size_t len,
55	int writeflag, void *extra)
56	{
57	struct colorplanemask_data d = (struct colorplanemask_data ) extra;
58
59	switch (relative_addr) {
60	case 0x00:
61	if (writeflag == MEM_WRITE) {
62	*d->color_plane_mask = data[0];
63	} else {
64	debug("[ colorplanemask: read isn't actually "
65	"supported ]\n");
66	data[0] = *d->color_plane_mask;
67	}
68	break;
69	default:
70	if (writeflag == MEM_WRITE) {
71	debug("[ colorplanemask: unimplemented write "
72	"to address 0x%x, data=0x%02x ]\n",
73	(int)relative_addr, data[0]);
74	} else {
75	debug("[ colorplanemask: unimplemented read "
76	"from address 0x%x ]\n", (int)relative_addr);
77	}
78	}
79
80	/* Pretend it was ok: */
81	return 1;
82	}
83
84
85	/*
86	* dev_colorplanemask_init():
87	*/
88	void dev_colorplanemask_init(struct memory *mem, uint64_t baseaddr,
89	unsigned char *color_plane_mask)
90	{
91	struct colorplanemask_data *d =
92	malloc(sizeof(struct colorplanemask_data));
93	if (d == NULL) {
94	fprintf(stderr, "out of memory\n");
95	exit(1);
96	}
97	memset(d, 0, sizeof(struct colorplanemask_data));
98	d->color_plane_mask = color_plane_mask;
99
100	memory_device_register(mem, "colorplanemask", baseaddr,
101	DEV_COLORPLANEMASK_LENGTH, dev_colorplanemask_access,
102	(void *)d, MEM_DEFAULT, NULL);
103	}
104