a277787e3c65c2d1a77e65569bcf12fd36c91391
1 /* mem.c --- memory for M32C simulator.
3 Copyright (C) 2005, 2007, 2008 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/>. */
27 #include <sys/types.h>
29 #include <sys/select.h>
45 #define L1_LEN (1 << L1_BITS)
46 #define L2_LEN (1 << L2_BITS)
47 #define OFF_LEN (1 << OFF_BITS)
49 static unsigned char **pt
[L1_LEN
];
51 int m32c_console_ifd
= 0;
52 int m32c_console_ofd
= 1;
58 /* [ get=0/put=1 ][ byte size ] */
59 static unsigned int mem_counters
[2][5];
61 #define COUNT(isput,bytes) \
62 if (verbose && enable_counting) mem_counters[isput][bytes]++
69 for (i
= 0; i
< L1_LEN
; i
++)
72 for (j
= 0; j
< L2_LEN
; j
++)
77 memset (pt
, 0, sizeof (pt
));
78 memset (mem_counters
, 0, sizeof (mem_counters
));
81 static unsigned char *
84 static int recursing
= 0;
85 int pt1
= (address
>> (L2_BITS
+ OFF_BITS
)) & ((1 << L1_BITS
) - 1);
86 int pt2
= (address
>> OFF_BITS
) & ((1 << L2_BITS
) - 1);
87 int pto
= address
& ((1 << OFF_BITS
) - 1);
89 if (address
== 0 && !recursing
)
92 put_reg (pc
, m32c_opcode_pc
);
93 printf ("NULL pointer dereference at pc=0x%x\n", get_reg (pc
));
94 step_result
= M32C_MAKE_HIT_BREAK ();
96 /* This code can be re-enabled to help diagnose NULL pointer
97 bugs that aren't debuggable in GDB. */
98 m32c_dump_all_registers ();
104 pt
[pt1
] = (unsigned char **) calloc (L2_LEN
, sizeof (char **));
105 if (pt
[pt1
][pt2
] == 0)
107 pt
[pt1
][pt2
] = (unsigned char *) malloc (OFF_LEN
);
108 memset (pt
[pt1
][pt2
], 0, OFF_LEN
);
111 return pt
[pt1
][pt2
] + pto
;
115 used (int rstart
, int i
, int j
)
117 int rend
= i
<< (L2_BITS
+ OFF_BITS
);
118 rend
+= j
<< OFF_BITS
;
119 if (rstart
== 0xe0000 && rend
== 0xe1000)
121 printf ("mem: %08x - %08x (%dk bytes)\n", rstart
, rend
- 1,
122 (rend
- rstart
) / 1024);
126 mcs (int isput
, int bytes
)
128 return comma (mem_counters
[isput
][bytes
]);
138 for (i
= 0; i
< L1_LEN
; i
++)
141 for (j
= 0; j
< L2_LEN
; j
++)
147 rstart
= (i
<< (L2_BITS
+ OFF_BITS
)) + (j
<< OFF_BITS
);
164 /* mem foo: 123456789012 123456789012 123456789012 123456789012
166 printf (" byte short pointer long"
168 printf ("mem get: %12s %12s %12s %12s %12s\n", mcs (0, 1), mcs (0, 2),
169 mcs (0, 3), mcs (0, 4), mcs (0, 0));
170 printf ("mem put: %12s %12s %12s %12s\n", mcs (1, 1), mcs (1, 2),
171 mcs (1, 3), mcs (1, 4));
176 s (int address
, char *dir
)
179 printf ("MEM[%0*x] %s", membus_mask
== 0xfffff ? 5 : 6, address
, dir
);
183 #define S(d) if (trace) s(address, d)
194 #define E() if (trace) e()
196 extern int m32c_disassemble
;
199 mem_put_byte (int address
, unsigned char value
)
202 address
&= membus_mask
;
203 m
= mem_ptr (address
);
205 printf (" %02x", value
);
211 static int old_led
= -1;
212 static char *led_on
[] =
213 { "\033[31m O ", "\033[32m O ", "\033[34m O " };
214 static char *led_off
[] = { "\033[0m · ", "\033[0m · ", "\033[0m · " };
216 if (old_led
!= value
)
219 for (i
= 0; i
< 3; i
++)
220 if (value
& (1 << i
))
221 fputs (led_off
[i
], stdout
);
223 fputs (led_on
[i
], stdout
);
224 fputs ("\033[0m\r", stdout
);
232 case 0x346: /* TA0low */
233 timer_a
.count
= (timer_a
.count
& 0xff00) | value
;
234 timer_a
.reload
= timer_a
.count
;
236 case 0x347: /* TA0high */
237 timer_a
.count
= (timer_a
.count
& 0x00ff) | (value
<< 8);
238 timer_a
.reload
= timer_a
.count
;
240 case 0x340: /* TABSR */
243 case 0x356: /* TA0MR */
244 timer_a
.mode
= value
;
246 case 0x35f: /* TCSPR */
247 timer_a
.tcspr
= value
;
249 case 0x006c: /* TA0IC */
254 case 0x100: /* TRACR */
257 case 0x102: /* TRAMR */
258 timer_a
.mode
= value
;
260 case 0x104: /* TRA */
261 timer_a
.count
= value
;
262 timer_a
.reload
= value
;
264 case 0x103: /* TRAPRE */
265 timer_a
.tcspr
= value
;
267 case 0x0056: /* TA0IC */
272 case 0x2ea: /* m32c uart1tx */
273 case 0x3aa: /* m16c uart1tx */
275 static int pending_exit
= 0;
280 step_result
= M32C_MAKE_EXITED (value
);
287 write (m32c_console_ofd
, &value
, 1);
293 m32c_syscall (value
);
301 printf ("SimTrace: %06lx %02x\n", regs
.r_pc
, value
);
305 printf ("SimTrap: %06lx %02x\n", regs
.r_pc
, value
);
311 mem_put_qi (int address
, unsigned char value
)
314 mem_put_byte (address
, value
& 0xff);
320 mem_put_hi (int address
, unsigned short value
)
322 if (address
== 0x402)
324 printf ("SimTrace: %06lx %04x\n", regs
.r_pc
, value
);
328 mem_put_byte (address
, value
& 0xff);
329 mem_put_byte (address
+ 1, value
>> 8);
335 mem_put_psi (int address
, unsigned long value
)
338 mem_put_byte (address
, value
& 0xff);
339 mem_put_byte (address
+ 1, (value
>> 8) & 0xff);
340 mem_put_byte (address
+ 2, value
>> 16);
346 mem_put_si (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) & 0xff);
352 mem_put_byte (address
+ 3, (value
>> 24) & 0xff);
358 mem_put_blk (int address
, void *bufptr
, int nbytes
)
362 mem_counters
[1][1] += nbytes
;
364 mem_put_byte (address
++, *(unsigned char *) bufptr
++);
371 unsigned char *m
= mem_ptr (regs
.r_pc
& membus_mask
);
376 static int console_raw
= 0;
377 static struct termios attr
, oattr
;
389 FD_SET (m32c_console_ifd
, &ifd
);
390 n
= select (1, &ifd
, 0, 0, &t
);
395 m32c_sim_restore_console ()
397 tcsetattr (m32c_console_ifd
, TCSANOW
, &oattr
);
402 mem_get_byte (int address
)
405 address
&= membus_mask
;
406 m
= mem_ptr (address
);
409 case 0x2ed: /* m32c uart1c1 */
410 case 0x3ad: /* m16c uart1c1 */
415 tcgetattr (m32c_console_ifd
, &attr
);
416 tcgetattr (m32c_console_ifd
, &oattr
);
417 /* We want each key to be sent as the user presses them. */
418 attr
.c_lflag
&= ~(ICANON
| ECHO
| ECHOE
);
419 tcsetattr (m32c_console_ifd
, TCSANOW
, &attr
);
421 atexit (m32c_sim_restore_console
);
426 return 0x02; /* tx empty and rx full */
428 return 0x0a; /* transmitter empty */
430 case 0x2ee: /* m32c uart1 rx */
433 read (m32c_console_ifd
, &c
, 1);
434 if (m32c_console_ifd
== 0 && c
== 3) /* Ctrl-C */
436 printf ("Ctrl-C!\n");
440 if (m32c_console_ifd
!= 1)
443 printf ("\033[31m%c\033[0m", c
);
445 printf ("\033[31m%02x\033[0m", c
);
451 case 0x346: /* TA0low */
452 return timer_a
.count
& 0xff;
453 case 0x347: /* TA0high */
454 return (timer_a
.count
>> 8) & 0xff;
455 case 0x104: /* TRA */
456 return timer_a
.count
;
463 printf (" %02x", *m
);
469 mem_get_qi (int address
)
473 rv
= mem_get_byte (address
);
480 mem_get_hi (int address
)
484 rv
= mem_get_byte (address
);
485 rv
|= mem_get_byte (address
+ 1) * 256;
492 mem_get_psi (int address
)
496 rv
= mem_get_byte (address
);
497 rv
|= mem_get_byte (address
+ 1) * 256;
498 rv
|= mem_get_byte (address
+ 2) * 65536;
505 mem_get_si (int address
)
509 rv
= mem_get_byte (address
);
510 rv
|= mem_get_byte (address
+ 1) << 8;
511 rv
|= mem_get_byte (address
+ 2) << 16;
512 rv
|= mem_get_byte (address
+ 3) << 24;
519 mem_get_blk (int address
, void *bufptr
, int nbytes
)
523 mem_counters
[0][1] += nbytes
;
525 *(char *) bufptr
++ = mem_get_byte (address
++);
530 sign_ext (int v
, int bits
)
534 v
&= (1 << bits
) - 1;
535 if (v
& (1 << (bits
- 1)))
548 if (timer_a
.prescale
< 0)
552 switch (timer_a
.mode
& 0xc0)
555 timer_a
.prescale
= 0;
558 timer_a
.prescale
= 8;
561 timer_a
.prescale
= timer_a
.tcspr
& 0x0f;
564 timer_a
.prescale
= 32;
570 timer_a
.prescale
= timer_a
.tcspr
;
573 if (timer_a
.count
< 0)
575 timer_a
.count
= timer_a
.reload
;
579 mem_put_qi (0x6c, timer_a
.ic
| 0x08);
581 mem_put_qi (0x56, timer_a
.ic
| 0x08);
587 if (regs
.r_flags
& FLAGBIT_I
/* interrupts enabled */
588 && timer_a
.ic
& 0x08 /* timer A interrupt triggered */
589 && (timer_a
.ic
& 0x07) > ((regs
.r_flags
>> 12) & 0x07))
592 trigger_peripheral_interrupt (12, 0x06c);
594 trigger_peripheral_interrupt (22, 0x056);
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