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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* This file is part of the program psim.
Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
Copyright (C) 1997, Free Software Foundation
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <signal.h> /* FIXME - should be machine dependant version */
#include <stdarg.h>
#include <ctype.h>
#include "bfd.h"
#include "sim-main.h"
#include "sim-utils.h"
#include "sim-options.h"
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#define SIM_ADDR unsigned
/* Structures used by the simulator, for gdb just have static structures */
struct sim_state simulation = { 0 };
SIM_DESC
sim_open (SIM_OPEN_KIND kind,
host_callback *callback,
struct _bfd *abfd,
char **argv)
{
SIM_DESC sd = &simulation;
STATE_OPEN_KIND (sd) = kind;
STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
STATE_CALLBACK (&simulation) = callback;
if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
return 0;
/* getopt will print the error message so we just have to exit if this fails.
FIXME: Hmmm... in the case of gdb we need getopt to call
print_filtered. */
if (sim_parse_args (sd, argv) != SIM_RC_OK)
{
/* Uninstall the modules to avoid memory leaks,
file descriptor leaks, etc. */
sim_module_uninstall (sd);
return 0;
}
/* check for/establish the a reference program image */
if (sim_analyze_program (sd,
(STATE_PROG_ARGV (sd) != NULL
? *STATE_PROG_ARGV (sd)
: NULL),
abfd) != SIM_RC_OK)
{
sim_module_uninstall (sd);
return 0;
}
/* establish any remaining configuration options */
if (sim_config (sd) != SIM_RC_OK)
{
sim_module_uninstall (sd);
return 0;
}
if (sim_post_argv_init (sd) != SIM_RC_OK)
{
/* Uninstall the modules to avoid memory leaks,
file descriptor leaks, etc. */
sim_module_uninstall (sd);
return 0;
}
/* Initialize the main processor */
memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg);
memset (&STATE_CPU (sd, 0)->acc, 0, sizeof STATE_CPU (sd, 0)->acc);
memset (&STATE_CPU (sd, 0)->cr, 0, sizeof STATE_CPU (sd, 0)->cr);
STATE_CPU (sd, 0)->is_user_mode = 0;
memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia);
CPU_STATE (STATE_CPU (sd, 0)) = sd;
#define TIC80_MEM_START 0x2000000
#define TIC80_MEM_SIZE 0x100000
/* external memory */
sim_core_attach(sd,
NULL,
attach_raw_memory,
access_read_write_exec,
0, TIC80_MEM_START, TIC80_MEM_SIZE, NULL, NULL);
sim_core_attach(sd,
NULL,
attach_raw_memory,
access_read_write_exec,
0, 0, TIC80_MEM_SIZE, NULL, NULL);
/* FIXME: for now */
return sd;
}
void
sim_close (SIM_DESC sd, int quitting)
{
/* Uninstall the modules to avoid memory leaks,
file descriptor leaks, etc. */
sim_module_uninstall (sd);
}
int
sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
{
return sim_core_read_buffer (sd, NULL, sim_core_write_map,
buf, mem, length);
}
int
sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
{
return sim_core_write_buffer (sd, NULL, sim_core_write_map,
buf, mem, length);
}
/* FIXME - these magic numbers need to be moved elsewhere */
#define SP_REGNUM 1 /* Contains address of top of stack */
#define FP_REGNUM 31 /* Contains address of executing stack frame */
#define PC_REGNUM 32 /* Contains program counter (FIXME?) */
#define NPC_REGNUM 33 /* Contains the next program counter (FIXME?) */
#define A0_REGNUM 34 /* Accumulator register 0 */
#define A3_REGNUM 37 /* Accumulator register 1 */
#define R0_REGNUM 0 /* General Purpose Register 0 - for sim */
#define Rn_REGNUM 31 /* Last General Purpose Register - for sim */
#define An_REGNUM A3_REGNUM /* Last Accumulator register - for sim */
void
sim_fetch_register (SIM_DESC sd, int regnr, unsigned char *buf)
{
if (regnr == R0_REGNUM)
memset (buf, 0, sizeof (unsigned32));
else if (regnr > R0_REGNUM && regnr <= Rn_REGNUM)
*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM]);
else if (regnr == PC_REGNUM)
*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.ip);
else if (regnr == NPC_REGNUM)
*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.dp);
else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
*(unsigned64*)buf = H2T_8 (STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM]);
else
sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
return;
}
void
sim_store_register (SIM_DESC sd, int regnr, unsigned char *buf)
{
if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM)
STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM] = T2H_4 (*(unsigned32*)buf);
else if (regnr == PC_REGNUM)
STATE_CPU (sd, 0)->cia.ip = T2H_4 (*(unsigned32*)buf);
else if (regnr == NPC_REGNUM)
STATE_CPU (sd, 0)->cia.dp = T2H_4 (*(unsigned32*)buf);
else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM] = T2H_8 (*(unsigned64*)buf);
else
sim_io_error (sd, "sim_store_register - unknown register nr %d", regnr);
return;
}
void
sim_info (SIM_DESC sd, int verbose)
{
}
SIM_RC
sim_create_inferior (SIM_DESC sd,
struct _bfd *abfd,
char **argv,
char **envp)
{
if (abfd != NULL)
STATE_CPU (sd, 0)->cia.ip = bfd_get_start_address (abfd);
else
STATE_CPU (sd, 0)->cia.ip = 0;
STATE_CPU (sd, 0)->cia.dp = (STATE_CPU (sd, 0)->cia.ip
+ sizeof (instruction_word));
STATE_CPU (sd, 0)->cr[IE_CR] |= IE_CR_IE;
STATE_CPU (sd, 0)->reg[1] = TIC80_MEM_START + TIC80_MEM_SIZE - 16;
return SIM_RC_OK;
}
void
sim_do_command (SIM_DESC sd, char *cmd)
{
if (sim_args_command (sd, cmd) != SIM_RC_OK)
sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
}
|
