1 /* mem.c --- memory for M32C simulator.
3 Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of the GNU simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include <sys/types.h>
30 #ifdef HAVE_SYS_SELECT_H
31 #include <sys/select.h>
50 #define L1_LEN (1 << L1_BITS)
51 #define L2_LEN (1 << L2_BITS)
52 #define OFF_LEN (1 << OFF_BITS)
54 static unsigned char **pt
[L1_LEN
];
57 int m32c_console_ifd
= 0;
59 int m32c_console_ofd
= 1;
61 int m32c_use_raw_console
= 0;
68 /* [ get=0/put=1 ][ byte size ] */
69 static unsigned int mem_counters
[2][5];
71 #define COUNT(isput,bytes) \
72 if (verbose && enable_counting) mem_counters[isput][bytes]++
79 for (i
= 0; i
< L1_LEN
; i
++)
82 for (j
= 0; j
< L2_LEN
; j
++)
87 memset (pt
, 0, sizeof (pt
));
88 memset (mem_counters
, 0, sizeof (mem_counters
));
91 static unsigned char *
94 static int recursing
= 0;
95 int pt1
= (address
>> (L2_BITS
+ OFF_BITS
)) & ((1 << L1_BITS
) - 1);
96 int pt2
= (address
>> OFF_BITS
) & ((1 << L2_BITS
) - 1);
97 int pto
= address
& ((1 << OFF_BITS
) - 1);
99 if (address
== 0 && !recursing
)
102 put_reg (pc
, m32c_opcode_pc
);
103 printf ("NULL pointer dereference at pc=0x%x\n", get_reg (pc
));
104 step_result
= M32C_MAKE_HIT_BREAK ();
106 /* This code can be re-enabled to help diagnose NULL pointer
107 bugs that aren't debuggable in GDB. */
108 m32c_dump_all_registers ();
114 pt
[pt1
] = (unsigned char **) calloc (L2_LEN
, sizeof (char **));
115 if (pt
[pt1
][pt2
] == 0)
117 pt
[pt1
][pt2
] = (unsigned char *) malloc (OFF_LEN
);
118 memset (pt
[pt1
][pt2
], 0, OFF_LEN
);
121 return pt
[pt1
][pt2
] + pto
;
125 used (int rstart
, int i
, int j
)
127 int rend
= i
<< (L2_BITS
+ OFF_BITS
);
128 rend
+= j
<< OFF_BITS
;
129 if (rstart
== 0xe0000 && rend
== 0xe1000)
131 printf ("mem: %08x - %08x (%dk bytes)\n", rstart
, rend
- 1,
132 (rend
- rstart
) / 1024);
136 mcs (int isput
, int bytes
)
138 return comma (mem_counters
[isput
][bytes
]);
148 for (i
= 0; i
< L1_LEN
; i
++)
151 for (j
= 0; j
< L2_LEN
; j
++)
157 rstart
= (i
<< (L2_BITS
+ OFF_BITS
)) + (j
<< OFF_BITS
);
174 /* mem foo: 123456789012 123456789012 123456789012 123456789012
176 printf (" byte short pointer long"
178 printf ("mem get: %12s %12s %12s %12s %12s\n", mcs (0, 1), mcs (0, 2),
179 mcs (0, 3), mcs (0, 4), mcs (0, 0));
180 printf ("mem put: %12s %12s %12s %12s\n", mcs (1, 1), mcs (1, 2),
181 mcs (1, 3), mcs (1, 4));
186 s (int address
, char *dir
)
189 printf ("MEM[%0*x] %s", membus_mask
== 0xfffff ? 5 : 6, address
, dir
);
193 #define S(d) if (trace) s(address, d)
204 #define E() if (trace) e()
206 extern int m32c_disassemble
;
209 mem_put_byte (int address
, unsigned char value
)
212 address
&= membus_mask
;
213 m
= mem_ptr (address
);
215 printf (" %02x", value
);
221 static int old_led
= -1;
222 static char *led_on
[] =
223 { "\033[31m O ", "\033[32m O ", "\033[34m O " };
224 static char *led_off
[] = { "\033[0m · ", "\033[0m · ", "\033[0m · " };
226 if (old_led
!= value
)
229 for (i
= 0; i
< 3; i
++)
230 if (value
& (1 << i
))
231 fputs (led_off
[i
], stdout
);
233 fputs (led_on
[i
], stdout
);
234 fputs ("\033[0m\r", stdout
);
242 case 0x346: /* TA0low */
243 timer_a
.count
= (timer_a
.count
& 0xff00) | value
;
244 timer_a
.reload
= timer_a
.count
;
246 case 0x347: /* TA0high */
247 timer_a
.count
= (timer_a
.count
& 0x00ff) | (value
<< 8);
248 timer_a
.reload
= timer_a
.count
;
250 case 0x340: /* TABSR */
253 case 0x356: /* TA0MR */
254 timer_a
.mode
= value
;
256 case 0x35f: /* TCSPR */
257 timer_a
.tcspr
= value
;
259 case 0x006c: /* TA0IC */
264 case 0x100: /* TRACR */
267 case 0x102: /* TRAMR */
268 timer_a
.mode
= value
;
270 case 0x104: /* TRA */
271 timer_a
.count
= value
;
272 timer_a
.reload
= value
;
274 case 0x103: /* TRAPRE */
275 timer_a
.tcspr
= value
;
277 case 0x0056: /* TA0IC */
282 case 0x2ea: /* m32c uart1tx */
283 case 0x3aa: /* m16c uart1tx */
285 static int pending_exit
= 0;
290 step_result
= M32C_MAKE_EXITED (value
);
297 write (m32c_console_ofd
, &value
, 1);
303 m32c_syscall (value
);
311 printf ("SimTrace: %06lx %02x\n", regs
.r_pc
, value
);
315 printf ("SimTrap: %06lx %02x\n", regs
.r_pc
, value
);
321 mem_put_qi (int address
, unsigned char value
)
324 mem_put_byte (address
, value
& 0xff);
330 mem_put_hi (int address
, unsigned short value
)
332 if (address
== 0x402)
334 printf ("SimTrace: %06lx %04x\n", regs
.r_pc
, value
);
338 mem_put_byte (address
, value
& 0xff);
339 mem_put_byte (address
+ 1, value
>> 8);
345 mem_put_psi (int address
, unsigned long value
)
348 mem_put_byte (address
, value
& 0xff);
349 mem_put_byte (address
+ 1, (value
>> 8) & 0xff);
350 mem_put_byte (address
+ 2, value
>> 16);
356 mem_put_si (int address
, unsigned long value
)
359 mem_put_byte (address
, value
& 0xff);
360 mem_put_byte (address
+ 1, (value
>> 8) & 0xff);
361 mem_put_byte (address
+ 2, (value
>> 16) & 0xff);
362 mem_put_byte (address
+ 3, (value
>> 24) & 0xff);
368 mem_put_blk (int address
, const void *bufptr
, int nbytes
)
372 mem_counters
[1][1] += nbytes
;
374 mem_put_byte (address
++, *(const unsigned char *) bufptr
++);
381 unsigned char *m
= mem_ptr (regs
.r_pc
& membus_mask
);
386 #ifdef HAVE_TERMIOS_H
387 static int console_raw
= 0;
388 static struct termios oattr
;
400 FD_SET (m32c_console_ifd
, &ifd
);
401 n
= select (1, &ifd
, 0, 0, &t
);
406 m32c_sim_restore_console ()
409 tcsetattr (m32c_console_ifd
, TCSANOW
, &oattr
);
415 mem_get_byte (int address
)
418 address
&= membus_mask
;
419 m
= mem_ptr (address
);
422 #ifdef HAVE_TERMIOS_H
423 case 0x2ed: /* m32c uart1c1 */
424 case 0x3ad: /* m16c uart1c1 */
426 if (!console_raw
&& m32c_use_raw_console
)
429 tcgetattr (m32c_console_ifd
, &attr
);
430 tcgetattr (m32c_console_ifd
, &oattr
);
431 /* We want each key to be sent as the user presses them. */
432 attr
.c_lflag
&= ~(ICANON
| ECHO
| ECHOE
);
433 tcsetattr (m32c_console_ifd
, TCSANOW
, &attr
);
435 atexit (m32c_sim_restore_console
);
439 return 0x02; /* tx empty and rx full */
441 return 0x0a; /* transmitter empty */
443 case 0x2ee: /* m32c uart1 rx */
446 read (m32c_console_ifd
, &c
, 1);
447 if (m32c_console_ifd
== 0 && c
== 3) /* Ctrl-C */
449 printf ("Ctrl-C!\n");
453 if (m32c_console_ifd
!= 1)
456 printf ("\033[31m%c\033[0m", c
);
458 printf ("\033[31m%02x\033[0m", c
);
465 case 0x346: /* TA0low */
466 return timer_a
.count
& 0xff;
467 case 0x347: /* TA0high */
468 return (timer_a
.count
>> 8) & 0xff;
469 case 0x104: /* TRA */
470 return timer_a
.count
;
474 /* In case both cases above are not included. */
480 printf (" %02x", *m
);
486 mem_get_qi (int address
)
490 rv
= mem_get_byte (address
);
497 mem_get_hi (int address
)
501 rv
= mem_get_byte (address
);
502 rv
|= mem_get_byte (address
+ 1) * 256;
509 mem_get_psi (int address
)
513 rv
= mem_get_byte (address
);
514 rv
|= mem_get_byte (address
+ 1) * 256;
515 rv
|= mem_get_byte (address
+ 2) * 65536;
522 mem_get_si (int address
)
526 rv
= mem_get_byte (address
);
527 rv
|= mem_get_byte (address
+ 1) << 8;
528 rv
|= mem_get_byte (address
+ 2) << 16;
529 rv
|= mem_get_byte (address
+ 3) << 24;
536 mem_get_blk (int address
, void *bufptr
, int nbytes
)
540 mem_counters
[0][1] += nbytes
;
542 *(char *) bufptr
++ = mem_get_byte (address
++);
547 sign_ext (int v
, int bits
)
551 v
&= (1 << bits
) - 1;
552 if (v
& (1 << (bits
- 1)))
565 if (timer_a
.prescale
< 0)
569 switch (timer_a
.mode
& 0xc0)
572 timer_a
.prescale
= 0;
575 timer_a
.prescale
= 8;
578 timer_a
.prescale
= timer_a
.tcspr
& 0x0f;
581 timer_a
.prescale
= 32;
587 timer_a
.prescale
= timer_a
.tcspr
;
590 if (timer_a
.count
< 0)
592 timer_a
.count
= timer_a
.reload
;
596 mem_put_qi (0x6c, timer_a
.ic
| 0x08);
598 mem_put_qi (0x56, timer_a
.ic
| 0x08);
604 if (regs
.r_flags
& FLAGBIT_I
/* interrupts enabled */
605 && timer_a
.ic
& 0x08 /* timer A interrupt triggered */
606 && (timer_a
.ic
& 0x07) > ((regs
.r_flags
>> 12) & 0x07))
609 trigger_peripheral_interrupt (12, 0x06c);
611 trigger_peripheral_interrupt (22, 0x056);