1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009, 2010 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef SIMIO_DEVICE_H_
#define SIMIO_DEVICE_H_
#include <stdint.h>
#include "util.h"
#include "list.h"
/* Each system clock has a unique index. After each instruction, step()
* is invoked on each device with an array of clock transition counts.
*/
typedef enum {
SIMIO_MCLK = 0,
SIMIO_SMCLK,
SIMIO_ACLK,
SIMIO_NUM_CLOCKS
} simio_clock_t;
/* Access to special function registers is provided by these functions. The
* modify function does:
*
* SFR = (SFR & ~mask) | bits
*/
#define SIMIO_IE1 0x00
#define SIMIO_IFG1 0x01
#define SIMIO_IE2 0x02
#define SIMIO_IFG2 0x03
uint8_t simio_sfr_get(address_t which);
void simio_sfr_modify(address_t which, uint8_t mask, uint8_t bits);
struct simio_class;
/* Device base class.
*
* The node and name fields will be filled out by the IO simulator - they're
* used for keeping track of the device list. The node member MUST be the
* first in the struct.
*/
struct simio_device {
struct list_node node;
char name[64];
const struct simio_class *type;
};
struct simio_class {
const char *name;
const char *help;
/* Instantiate a new device, with the given arguments. This may
* fail, in which case NULL should be returned.
*/
struct simio_device *(*create)(char **arg_text);
void (*destroy)(struct simio_device *dev);
/* These methods are invoked via the command interface to modify
* device data and show status.
*/
int (*config)(struct simio_device *dev, const char *param,
char **arg_text);
int (*info)(struct simio_device *dev);
/* System reset hook. */
void (*reset)(struct simio_device *dev);
/* Programmed IO functions return 1 to indicate an unhandled
* request. This scheme allows stacking.
*/
int (*write)(struct simio_device *dev,
address_t addr, uint16_t data);
int (*read)(struct simio_device *dev,
address_t addr, uint16_t *data);
int (*write_b)(struct simio_device *dev,
address_t addr, uint8_t data);
int (*read_b)(struct simio_device *dev,
address_t addr, uint8_t *data);
/* Check and acknowledge interrupts. Each device may produce
* a single interrupt request at any time.
*/
int (*check_interrupt)(struct simio_device *dev);
void (*ack_interrupt)(struct simio_device *dev, int irq);
/* Run the clocks for this device. The counters array has one
* array per clock, and gives the number of cycles elapsed since
* the last call to this method.
*/
void (*step)(struct simio_device *dev,
uint16_t status_register, const int *clocks);
};
#endif
|
