1 /* mem.c --- memory for M32C simulator.
3 Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Red Hat, Inc.
7 This file is part of the GNU simulators.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
29 #include <sys/types.h>
31 #ifdef HAVE_SYS_SELECT_H
32 #include <sys/select.h>
51 #define L1_LEN (1 << L1_BITS)
52 #define L2_LEN (1 << L2_BITS)
53 #define OFF_LEN (1 << OFF_BITS)
55 static unsigned char **pt
[L1_LEN
];
58 int m32c_console_ifd
= 0;
60 int m32c_console_ofd
= 1;
62 int m32c_use_raw_console
= 0;
69 /* [ get=0/put=1 ][ byte size ] */
70 static unsigned int mem_counters
[2][5];
72 #define COUNT(isput,bytes) \
73 if (verbose && enable_counting) mem_counters[isput][bytes]++
80 for (i
= 0; i
< L1_LEN
; i
++)
83 for (j
= 0; j
< L2_LEN
; j
++)
88 memset (pt
, 0, sizeof (pt
));
89 memset (mem_counters
, 0, sizeof (mem_counters
));
92 static unsigned char *
95 static int recursing
= 0;
96 int pt1
= (address
>> (L2_BITS
+ OFF_BITS
)) & ((1 << L1_BITS
) - 1);
97 int pt2
= (address
>> OFF_BITS
) & ((1 << L2_BITS
) - 1);
98 int pto
= address
& ((1 << OFF_BITS
) - 1);
100 if (address
== 0 && !recursing
)
103 put_reg (pc
, m32c_opcode_pc
);
104 printf ("NULL pointer dereference at pc=0x%x\n", get_reg (pc
));
105 step_result
= M32C_MAKE_HIT_BREAK ();
107 /* This code can be re-enabled to help diagnose NULL pointer
108 bugs that aren't debuggable in GDB. */
109 m32c_dump_all_registers ();
115 pt
[pt1
] = (unsigned char **) calloc (L2_LEN
, sizeof (char **));
116 if (pt
[pt1
][pt2
] == 0)
118 pt
[pt1
][pt2
] = (unsigned char *) malloc (OFF_LEN
);
119 memset (pt
[pt1
][pt2
], 0, OFF_LEN
);
122 return pt
[pt1
][pt2
] + pto
;
126 used (int rstart
, int i
, int j
)
128 int rend
= i
<< (L2_BITS
+ OFF_BITS
);
129 rend
+= j
<< OFF_BITS
;
130 if (rstart
== 0xe0000 && rend
== 0xe1000)
132 printf ("mem: %08x - %08x (%dk bytes)\n", rstart
, rend
- 1,
133 (rend
- rstart
) / 1024);
137 mcs (int isput
, int bytes
)
139 return comma (mem_counters
[isput
][bytes
]);
149 for (i
= 0; i
< L1_LEN
; i
++)
152 for (j
= 0; j
< L2_LEN
; j
++)
158 rstart
= (i
<< (L2_BITS
+ OFF_BITS
)) + (j
<< OFF_BITS
);
175 /* mem foo: 123456789012 123456789012 123456789012 123456789012
177 printf (" byte short pointer long"
179 printf ("mem get: %12s %12s %12s %12s %12s\n", mcs (0, 1), mcs (0, 2),
180 mcs (0, 3), mcs (0, 4), mcs (0, 0));
181 printf ("mem put: %12s %12s %12s %12s\n", mcs (1, 1), mcs (1, 2),
182 mcs (1, 3), mcs (1, 4));
187 s (int address
, char *dir
)
190 printf ("MEM[%0*x] %s", membus_mask
== 0xfffff ? 5 : 6, address
, dir
);
194 #define S(d) if (trace) s(address, d)
205 #define E() if (trace) e()
207 extern int m32c_disassemble
;
210 mem_put_byte (int address
, unsigned char value
)
213 address
&= membus_mask
;
214 m
= mem_ptr (address
);
216 printf (" %02x", value
);
222 static int old_led
= -1;
223 static char *led_on
[] =
224 { "\033[31m O ", "\033[32m O ", "\033[34m O " };
225 static char *led_off
[] = { "\033[0m · ", "\033[0m · ", "\033[0m · " };
227 if (old_led
!= value
)
230 for (i
= 0; i
< 3; i
++)
231 if (value
& (1 << i
))
232 fputs (led_off
[i
], stdout
);
234 fputs (led_on
[i
], stdout
);
235 fputs ("\033[0m\r", stdout
);
243 case 0x346: /* TA0low */
244 timer_a
.count
= (timer_a
.count
& 0xff00) | value
;
245 timer_a
.reload
= timer_a
.count
;
247 case 0x347: /* TA0high */
248 timer_a
.count
= (timer_a
.count
& 0x00ff) | (value
<< 8);
249 timer_a
.reload
= timer_a
.count
;
251 case 0x340: /* TABSR */
254 case 0x356: /* TA0MR */
255 timer_a
.mode
= value
;
257 case 0x35f: /* TCSPR */
258 timer_a
.tcspr
= value
;
260 case 0x006c: /* TA0IC */
265 case 0x100: /* TRACR */
268 case 0x102: /* TRAMR */
269 timer_a
.mode
= value
;
271 case 0x104: /* TRA */
272 timer_a
.count
= value
;
273 timer_a
.reload
= value
;
275 case 0x103: /* TRAPRE */
276 timer_a
.tcspr
= value
;
278 case 0x0056: /* TA0IC */
283 case 0x2ea: /* m32c uart1tx */
284 case 0x3aa: /* m16c uart1tx */
286 static int pending_exit
= 0;
291 step_result
= M32C_MAKE_EXITED (value
);
298 write (m32c_console_ofd
, &value
, 1);
304 m32c_syscall (value
);
312 printf ("SimTrace: %06lx %02x\n", regs
.r_pc
, value
);
316 printf ("SimTrap: %06lx %02x\n", regs
.r_pc
, value
);
322 mem_put_qi (int address
, unsigned char value
)
325 mem_put_byte (address
, value
& 0xff);
331 mem_put_hi (int address
, unsigned short value
)
333 if (address
== 0x402)
335 printf ("SimTrace: %06lx %04x\n", regs
.r_pc
, value
);
339 mem_put_byte (address
, value
& 0xff);
340 mem_put_byte (address
+ 1, value
>> 8);
346 mem_put_psi (int address
, unsigned long value
)
349 mem_put_byte (address
, value
& 0xff);
350 mem_put_byte (address
+ 1, (value
>> 8) & 0xff);
351 mem_put_byte (address
+ 2, value
>> 16);
357 mem_put_si (int address
, unsigned long value
)
360 mem_put_byte (address
, value
& 0xff);
361 mem_put_byte (address
+ 1, (value
>> 8) & 0xff);
362 mem_put_byte (address
+ 2, (value
>> 16) & 0xff);
363 mem_put_byte (address
+ 3, (value
>> 24) & 0xff);
369 mem_put_blk (int address
, const void *bufptr
, int nbytes
)
373 mem_counters
[1][1] += nbytes
;
375 mem_put_byte (address
++, *(const unsigned char *) bufptr
++);
382 unsigned char *m
= mem_ptr (regs
.r_pc
& membus_mask
);
387 #ifdef HAVE_TERMIOS_H
388 static int console_raw
= 0;
389 static struct termios oattr
;
401 FD_SET (m32c_console_ifd
, &ifd
);
402 n
= select (1, &ifd
, 0, 0, &t
);
407 m32c_sim_restore_console ()
410 tcsetattr (m32c_console_ifd
, TCSANOW
, &oattr
);
416 mem_get_byte (int address
)
419 address
&= membus_mask
;
420 m
= mem_ptr (address
);
423 #ifdef HAVE_TERMIOS_H
424 case 0x2ed: /* m32c uart1c1 */
425 case 0x3ad: /* m16c uart1c1 */
427 if (!console_raw
&& m32c_use_raw_console
)
430 tcgetattr (m32c_console_ifd
, &attr
);
431 tcgetattr (m32c_console_ifd
, &oattr
);
432 /* We want each key to be sent as the user presses them. */
433 attr
.c_lflag
&= ~(ICANON
| ECHO
| ECHOE
);
434 tcsetattr (m32c_console_ifd
, TCSANOW
, &attr
);
436 atexit (m32c_sim_restore_console
);
440 return 0x02; /* tx empty and rx full */
442 return 0x0a; /* transmitter empty */
444 case 0x2ee: /* m32c uart1 rx */
447 read (m32c_console_ifd
, &c
, 1);
448 if (m32c_console_ifd
== 0 && c
== 3) /* Ctrl-C */
450 printf ("Ctrl-C!\n");
454 if (m32c_console_ifd
!= 1)
457 printf ("\033[31m%c\033[0m", c
);
459 printf ("\033[31m%02x\033[0m", c
);
466 case 0x346: /* TA0low */
467 return timer_a
.count
& 0xff;
468 case 0x347: /* TA0high */
469 return (timer_a
.count
>> 8) & 0xff;
470 case 0x104: /* TRA */
471 return timer_a
.count
;
475 /* In case both cases above are not included. */
481 printf (" %02x", *m
);
487 mem_get_qi (int address
)
491 rv
= mem_get_byte (address
);
498 mem_get_hi (int address
)
502 rv
= mem_get_byte (address
);
503 rv
|= mem_get_byte (address
+ 1) * 256;
510 mem_get_psi (int address
)
514 rv
= mem_get_byte (address
);
515 rv
|= mem_get_byte (address
+ 1) * 256;
516 rv
|= mem_get_byte (address
+ 2) * 65536;
523 mem_get_si (int address
)
527 rv
= mem_get_byte (address
);
528 rv
|= mem_get_byte (address
+ 1) << 8;
529 rv
|= mem_get_byte (address
+ 2) << 16;
530 rv
|= mem_get_byte (address
+ 3) << 24;
537 mem_get_blk (int address
, void *bufptr
, int nbytes
)
541 mem_counters
[0][1] += nbytes
;
543 *(char *) bufptr
++ = mem_get_byte (address
++);
548 sign_ext (int v
, int bits
)
552 v
&= (1 << bits
) - 1;
553 if (v
& (1 << (bits
- 1)))
566 if (timer_a
.prescale
< 0)
570 switch (timer_a
.mode
& 0xc0)
573 timer_a
.prescale
= 0;
576 timer_a
.prescale
= 8;
579 timer_a
.prescale
= timer_a
.tcspr
& 0x0f;
582 timer_a
.prescale
= 32;
588 timer_a
.prescale
= timer_a
.tcspr
;
591 if (timer_a
.count
< 0)
593 timer_a
.count
= timer_a
.reload
;
597 mem_put_qi (0x6c, timer_a
.ic
| 0x08);
599 mem_put_qi (0x56, timer_a
.ic
| 0x08);
605 if (regs
.r_flags
& FLAGBIT_I
/* interrupts enabled */
606 && timer_a
.ic
& 0x08 /* timer A interrupt triggered */
607 && (timer_a
.ic
& 0x07) > ((regs
.r_flags
>> 12) & 0x07))
610 trigger_peripheral_interrupt (12, 0x06c);
612 trigger_peripheral_interrupt (22, 0x056);
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