Commit | Line | Data |
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e0709f50 | 1 | /* dv-m68hc11tim.c -- Simulation of the 68HC11 timer devices. |
42a4f53d | 2 | Copyright (C) 1999-2019 Free Software Foundation, Inc. |
962e9d85 | 3 | Written by Stephane Carrez (stcarrez@nerim.fr) |
e0709f50 AC |
4 | (From a driver model Contributed by Cygnus Solutions.) |
5 | ||
6 | This file is part of the program GDB, the GNU debugger. | |
7 | ||
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 | |
4744ac1b JB |
10 | the Free Software Foundation; either version 3 of the License, or |
11 | (at your option) any later version. | |
12 | ||
e0709f50 AC |
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. | |
4744ac1b | 17 | |
e0709f50 | 18 | You should have received a copy of the GNU General Public License |
4744ac1b | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
e0709f50 AC |
20 | |
21 | */ | |
22 | ||
23 | ||
24 | #include "sim-main.h" | |
25 | #include "hw-main.h" | |
26 | #include "sim-assert.h" | |
a685700c | 27 | #include <limits.h> |
e0709f50 AC |
28 | |
29 | /* DEVICE | |
30 | ||
31 | m68hc11tim - m68hc11 timer devices | |
32 | ||
33 | ||
34 | DESCRIPTION | |
35 | ||
36 | Implements the m68hc11 timer as described in Chapter 10 | |
37 | of the pink book. | |
38 | ||
39 | ||
40 | PROPERTIES | |
41 | ||
42 | none | |
43 | ||
44 | ||
45 | PORTS | |
46 | ||
47 | reset (input) | |
48 | ||
49 | Reset the timer device. This port must be connected to | |
50 | the cpu-reset output port. | |
51 | ||
827ec39a SC |
52 | capture (input) |
53 | ||
54 | Input capture. This port must be connected to the input | |
55 | captures. It latches the current TCNT free running counter | |
56 | into one of the three input capture registers. | |
57 | ||
e0709f50 AC |
58 | */ |
59 | ||
60 | ||
61 | ||
62 | /* port ID's */ | |
63 | ||
64 | enum | |
65 | { | |
827ec39a SC |
66 | RESET_PORT, |
67 | CAPTURE | |
e0709f50 AC |
68 | }; |
69 | ||
70 | ||
71 | static const struct hw_port_descriptor m68hc11tim_ports[] = | |
72 | { | |
827ec39a SC |
73 | { "reset", RESET_PORT, 0, input_port, }, |
74 | { "capture", CAPTURE, 0, input_port, }, | |
e0709f50 AC |
75 | { NULL, }, |
76 | }; | |
77 | ||
78 | ||
79 | /* Timer Controller information. */ | |
80 | struct m68hc11tim | |
81 | { | |
82 | unsigned long cop_delay; | |
83 | unsigned long rti_delay; | |
84 | unsigned long ovf_delay; | |
85 | signed64 clock_prescaler; | |
86 | signed64 tcnt_adjust; | |
401493c8 SC |
87 | signed64 cop_prev_interrupt; |
88 | signed64 rti_prev_interrupt; | |
e0709f50 AC |
89 | |
90 | /* Periodic timers. */ | |
91 | struct hw_event *rti_timer_event; | |
92 | struct hw_event *cop_timer_event; | |
93 | struct hw_event *tof_timer_event; | |
94 | struct hw_event *cmp_timer_event; | |
95 | }; | |
96 | ||
97 | ||
98 | ||
99 | /* Finish off the partially created hw device. Attach our local | |
100 | callbacks. Wire up our port names etc. */ | |
101 | ||
102 | static hw_io_read_buffer_method m68hc11tim_io_read_buffer; | |
103 | static hw_io_write_buffer_method m68hc11tim_io_write_buffer; | |
104 | static hw_port_event_method m68hc11tim_port_event; | |
105 | static hw_ioctl_method m68hc11tim_ioctl; | |
106 | ||
107 | #define M6811_TIMER_FIRST_REG (M6811_TCTN) | |
108 | #define M6811_TIMER_LAST_REG (M6811_PACNT) | |
109 | ||
110 | ||
111 | static void | |
112 | attach_m68hc11tim_regs (struct hw *me, | |
113 | struct m68hc11tim *controller) | |
114 | { | |
63348d04 | 115 | hw_attach_address (hw_parent (me), M6811_IO_LEVEL, io_map, |
e0709f50 AC |
116 | M6811_TIMER_FIRST_REG, |
117 | M6811_TIMER_LAST_REG - M6811_TIMER_FIRST_REG + 1, | |
118 | me); | |
119 | } | |
120 | ||
e0709f50 AC |
121 | static void |
122 | m68hc11tim_finish (struct hw *me) | |
123 | { | |
124 | struct m68hc11tim *controller; | |
125 | ||
126 | controller = HW_ZALLOC (me, struct m68hc11tim); | |
e0709f50 AC |
127 | set_hw_data (me, controller); |
128 | set_hw_io_read_buffer (me, m68hc11tim_io_read_buffer); | |
129 | set_hw_io_write_buffer (me, m68hc11tim_io_write_buffer); | |
130 | set_hw_ports (me, m68hc11tim_ports); | |
131 | set_hw_port_event (me, m68hc11tim_port_event); | |
132 | #ifdef set_hw_ioctl | |
133 | set_hw_ioctl (me, m68hc11tim_ioctl); | |
134 | #else | |
135 | me->to_ioctl = m68hc11tim_ioctl; | |
136 | #endif | |
b93775f5 | 137 | |
e0709f50 AC |
138 | /* Preset defaults. */ |
139 | controller->clock_prescaler = 1; | |
140 | controller->tcnt_adjust = 0; | |
141 | ||
142 | /* Attach ourself to our parent bus. */ | |
143 | attach_m68hc11tim_regs (me, controller); | |
144 | } | |
145 | ||
146 | ||
e0709f50 AC |
147 | /* An event arrives on an interrupt port. */ |
148 | ||
149 | static void | |
150 | m68hc11tim_port_event (struct hw *me, | |
151 | int my_port, | |
152 | struct hw *source, | |
153 | int source_port, | |
154 | int level) | |
155 | { | |
156 | SIM_DESC sd; | |
157 | struct m68hc11tim *controller; | |
158 | sim_cpu *cpu; | |
159 | unsigned8 val; | |
827ec39a SC |
160 | unsigned16 tcnt; |
161 | ||
e0709f50 AC |
162 | controller = hw_data (me); |
163 | sd = hw_system (me); | |
164 | cpu = STATE_CPU (sd, 0); | |
165 | switch (my_port) | |
166 | { | |
167 | case RESET_PORT: | |
168 | { | |
169 | HW_TRACE ((me, "Timer reset")); | |
170 | ||
171 | /* Cancel all timer events. */ | |
172 | if (controller->rti_timer_event) | |
173 | { | |
174 | hw_event_queue_deschedule (me, controller->rti_timer_event); | |
175 | controller->rti_timer_event = 0; | |
401493c8 | 176 | controller->rti_prev_interrupt = 0; |
e0709f50 AC |
177 | } |
178 | if (controller->cop_timer_event) | |
179 | { | |
180 | hw_event_queue_deschedule (me, controller->cop_timer_event); | |
181 | controller->cop_timer_event = 0; | |
401493c8 | 182 | controller->cop_prev_interrupt = 0; |
e0709f50 AC |
183 | } |
184 | if (controller->tof_timer_event) | |
185 | { | |
186 | hw_event_queue_deschedule (me, controller->tof_timer_event); | |
187 | controller->tof_timer_event = 0; | |
188 | } | |
189 | if (controller->cmp_timer_event) | |
190 | { | |
191 | hw_event_queue_deschedule (me, controller->cmp_timer_event); | |
192 | controller->cmp_timer_event = 0; | |
193 | } | |
194 | ||
195 | /* Reset the state of Timer registers. This also restarts | |
86596dc8 SC |
196 | the timer events (overflow and RTI clock). The pending |
197 | flags (TFLG2) must be cleared explicitly here. */ | |
e0709f50 | 198 | val = 0; |
86596dc8 | 199 | cpu->ios[M6811_TFLG2] = 0; |
e0709f50 AC |
200 | m68hc11tim_io_write_buffer (me, &val, io_map, |
201 | (unsigned_word) M6811_TMSK2, 1); | |
e0709f50 AC |
202 | m68hc11tim_io_write_buffer (me, &val, io_map, |
203 | (unsigned_word) M6811_PACTL, 1); | |
204 | break; | |
205 | } | |
206 | ||
827ec39a SC |
207 | case CAPTURE: |
208 | tcnt = (uint16) ((cpu->cpu_absolute_cycle - controller->tcnt_adjust) | |
209 | / controller->clock_prescaler); | |
210 | switch (level) | |
211 | { | |
212 | case M6811_TIC1: | |
213 | case M6811_TIC2: | |
214 | case M6811_TIC3: | |
215 | cpu->ios[level] = tcnt >> 8; | |
216 | cpu->ios[level + 1] = tcnt; | |
217 | break; | |
218 | ||
219 | default: | |
220 | hw_abort (me, "Invalid event parameter %d", level); | |
221 | break; | |
222 | } | |
223 | break; | |
224 | ||
e0709f50 AC |
225 | default: |
226 | hw_abort (me, "Event on unknown port %d", my_port); | |
227 | break; | |
228 | } | |
229 | } | |
230 | ||
231 | enum event_type | |
232 | { | |
233 | COP_EVENT, | |
234 | RTI_EVENT, | |
235 | OVERFLOW_EVENT, | |
236 | COMPARE_EVENT | |
237 | }; | |
238 | ||
527aaa4a | 239 | static void |
e0709f50 AC |
240 | m68hc11tim_timer_event (struct hw *me, void *data) |
241 | { | |
242 | SIM_DESC sd; | |
243 | struct m68hc11tim *controller; | |
244 | sim_cpu *cpu; | |
245 | enum event_type type; | |
246 | unsigned long delay; | |
247 | struct hw_event **eventp; | |
248 | int check_interrupt = 0; | |
249 | unsigned mask; | |
250 | unsigned flags; | |
401493c8 | 251 | unsigned long tcnt_internal; |
a685700c SC |
252 | unsigned long tcnt, tcnt_prev; |
253 | signed64 tcnt_insn_end; | |
254 | signed64 tcnt_insn_start; | |
e0709f50 | 255 | int i; |
401493c8 | 256 | sim_events *events; |
e0709f50 AC |
257 | |
258 | controller = hw_data (me); | |
259 | sd = hw_system (me); | |
260 | cpu = STATE_CPU (sd, 0); | |
261 | type = (enum event_type) ((long) data) & 0x0FF; | |
401493c8 | 262 | events = STATE_EVENTS (sd); |
e0709f50 AC |
263 | |
264 | delay = 0; | |
265 | switch (type) | |
266 | { | |
267 | case COP_EVENT: | |
268 | eventp = &controller->cop_timer_event; | |
269 | delay = controller->cop_delay; | |
401493c8 SC |
270 | delay = controller->cop_prev_interrupt + controller->cop_delay; |
271 | controller->cop_prev_interrupt = delay; | |
272 | delay = delay - cpu->cpu_absolute_cycle; | |
e0709f50 | 273 | check_interrupt = 1; |
401493c8 | 274 | delay += events->nr_ticks_to_process; |
e0709f50 AC |
275 | break; |
276 | ||
277 | case RTI_EVENT: | |
278 | eventp = &controller->rti_timer_event; | |
401493c8 SC |
279 | delay = controller->rti_prev_interrupt + controller->rti_delay; |
280 | ||
e0709f50 AC |
281 | if (((long) (data) & 0x0100) == 0) |
282 | { | |
283 | cpu->ios[M6811_TFLG2] |= M6811_RTIF; | |
284 | check_interrupt = 1; | |
401493c8 SC |
285 | controller->rti_prev_interrupt = delay; |
286 | delay += controller->rti_delay; | |
e0709f50 | 287 | } |
401493c8 SC |
288 | delay = delay - cpu->cpu_absolute_cycle; |
289 | delay += events->nr_ticks_to_process; | |
e0709f50 AC |
290 | break; |
291 | ||
292 | case OVERFLOW_EVENT: | |
a685700c SC |
293 | /* Compute the 68HC11 internal free running counter. */ |
294 | tcnt_internal = (cpu->cpu_absolute_cycle - controller->tcnt_adjust); | |
401493c8 SC |
295 | |
296 | /* We must take into account the prescaler that comes | |
297 | before the counter (it's a power of 2). */ | |
298 | tcnt_internal &= 0x0ffff * controller->clock_prescaler; | |
299 | ||
300 | /* Compute the time when the overflow will occur. It occurs when | |
301 | the counter increments from 0x0ffff to 0x10000 (and thus resets). */ | |
302 | delay = (0x10000 * controller->clock_prescaler) - tcnt_internal; | |
303 | ||
304 | /* The 'nr_ticks_to_process' will be subtracted when the event | |
305 | is scheduled. */ | |
306 | delay += events->nr_ticks_to_process; | |
307 | ||
e0709f50 | 308 | eventp = &controller->tof_timer_event; |
401493c8 SC |
309 | if (((long) (data) & 0x100) == 0) |
310 | { | |
311 | cpu->ios[M6811_TFLG2] |= M6811_TOF; | |
312 | check_interrupt = 1; | |
313 | } | |
e0709f50 AC |
314 | break; |
315 | ||
316 | case COMPARE_EVENT: | |
a685700c SC |
317 | /* Compute value of TCNT register (64-bit precision) at beginning |
318 | and end of instruction. */ | |
319 | tcnt_insn_end = (cpu->cpu_absolute_cycle - controller->tcnt_adjust); | |
320 | tcnt_insn_start = (tcnt_insn_end - cpu->cpu_current_cycle); | |
321 | ||
322 | /* TCNT value at beginning of current instruction. */ | |
323 | tcnt_prev = (tcnt_insn_start / controller->clock_prescaler) & 0x0ffff; | |
e0709f50 | 324 | |
a685700c SC |
325 | /* TCNT value at end of current instruction. */ |
326 | tcnt = (tcnt_insn_end / controller->clock_prescaler) & 0x0ffff; | |
401493c8 SC |
327 | |
328 | /* We must take into account the prescaler that comes | |
329 | before the counter (it's a power of 2). */ | |
a685700c | 330 | tcnt_internal = tcnt_insn_end; |
401493c8 SC |
331 | tcnt_internal &= 0x0ffff * controller->clock_prescaler; |
332 | ||
e0709f50 AC |
333 | flags = cpu->ios[M6811_TMSK1]; |
334 | mask = 0x80; | |
401493c8 | 335 | delay = 65536 * controller->clock_prescaler; |
e0709f50 AC |
336 | |
337 | /* Scan each output compare register to see if one matches | |
338 | the free running counter. Set the corresponding OCi flag | |
339 | if the output compare is enabled. */ | |
340 | for (i = M6811_TOC1; i <= M6811_TOC5; i += 2, mask >>= 1) | |
341 | { | |
401493c8 | 342 | unsigned long compare; |
a685700c SC |
343 | |
344 | compare = (cpu->ios[i] << 8) + cpu->ios[i + 1]; | |
345 | ||
346 | /* See if compare is reached; handle wrap arround. */ | |
347 | if ((compare >= tcnt_prev && compare <= tcnt && tcnt_prev < tcnt) | |
348 | || (compare >= tcnt_prev && tcnt_prev > tcnt) | |
349 | || (compare < tcnt && tcnt_prev > tcnt)) | |
e0709f50 | 350 | { |
a685700c SC |
351 | unsigned dt; |
352 | ||
353 | if (compare > tcnt) | |
354 | dt = 0x10000 - compare - tcnt; | |
355 | else | |
356 | dt = tcnt - compare; | |
357 | ||
e0709f50 | 358 | cpu->ios[M6811_TFLG1] |= mask; |
a685700c SC |
359 | |
360 | /* Raise interrupt now at the correct CPU cycle so that | |
361 | we can find the interrupt latency. */ | |
362 | cpu->cpu_absolute_cycle -= dt; | |
363 | interrupts_update_pending (&cpu->cpu_interrupts); | |
364 | cpu->cpu_absolute_cycle += dt; | |
e0709f50 AC |
365 | } |
366 | ||
401493c8 SC |
367 | /* Compute how many times for the next match. |
368 | Use the internal counter value to take into account the | |
369 | prescaler accurately. */ | |
370 | compare = compare * controller->clock_prescaler; | |
371 | if (compare > tcnt_internal) | |
372 | compare = compare - tcnt_internal; | |
e0709f50 | 373 | else |
401493c8 SC |
374 | compare = compare - tcnt_internal |
375 | + 65536 * controller->clock_prescaler; | |
a685700c | 376 | |
e0709f50 AC |
377 | if (compare < delay) |
378 | delay = compare; | |
379 | } | |
e0709f50 AC |
380 | |
381 | /* Deactivate the compare timer if no output compare is enabled. */ | |
a685700c | 382 | if ((flags & 0xF8) == 0) |
e0709f50 | 383 | delay = 0; |
a685700c SC |
384 | else |
385 | delay += events->nr_ticks_to_process; | |
386 | ||
387 | eventp = &controller->cmp_timer_event; | |
e0709f50 AC |
388 | break; |
389 | ||
390 | default: | |
391 | eventp = 0; | |
392 | break; | |
393 | } | |
394 | ||
395 | if (*eventp) | |
396 | { | |
397 | hw_event_queue_deschedule (me, *eventp); | |
398 | *eventp = 0; | |
399 | } | |
400 | ||
401 | if (delay != 0) | |
402 | { | |
403 | *eventp = hw_event_queue_schedule (me, delay, | |
404 | m68hc11tim_timer_event, | |
405 | (void*) type); | |
406 | } | |
407 | ||
408 | if (check_interrupt) | |
409 | interrupts_update_pending (&cpu->cpu_interrupts); | |
410 | } | |
411 | ||
412 | ||
413 | /* Descriptions of the Timer I/O ports. These descriptions are only used to | |
414 | give information of the Timer device under GDB. */ | |
962e9d85 SC |
415 | io_reg_desc tmsk1_desc[] = { |
416 | { M6811_OC1I, "OC1I ", "Timer Output Compare 1 Interrupt Enable" }, | |
417 | { M6811_OC2I, "OC2I ", "Timer Output Compare 2 Interrupt Enable" }, | |
418 | { M6811_OC3I, "OC3I ", "Timer Output Compare 3 Interrupt Enable" }, | |
419 | { M6811_OC4I, "OC4I ", "Timer Output Compare 4 Interrupt Enable" }, | |
420 | { M6811_OC5I, "OC5I ", "Timer Input Capture 4 / Output Compare 5 Enable" }, | |
421 | { M6811_IC1I, "IC1I ", "Timer Input Capture 1 Interrupt Enable" }, | |
422 | { M6811_IC2I, "IC2I ", "Timer Input Capture 2 Interrupt Enable" }, | |
423 | { M6811_IC3I, "IC3I ", "Timer Input Capture 3 Interrupt Enable" }, | |
424 | { 0, 0, 0 } | |
425 | }; | |
426 | ||
427 | io_reg_desc tflg1_desc[] = { | |
428 | { M6811_OC1F, "OC1F ", "Timer Output Compare 1 Interrupt Flag" }, | |
429 | { M6811_OC2F, "OC2F ", "Timer Output Compare 2 Interrupt Flag" }, | |
430 | { M6811_OC3F, "OC3F ", "Timer Output Compare 3 Interrupt Flag" }, | |
431 | { M6811_OC4F, "OC4F ", "Timer Output Compare 4 Interrupt Flag" }, | |
432 | { M6811_OC5F, "OC5F ", "Timer Input Capture 4 / Output Compare 5 Flag" }, | |
433 | { M6811_IC1F, "IC1F ", "Timer Input Capture 1 Interrupt Flag" }, | |
434 | { M6811_IC2F, "IC2F ", "Timer Input Capture 2 Interrupt Flag" }, | |
435 | { M6811_IC3F, "IC3F ", "Timer Input Capture 3 Interrupt Flag" }, | |
436 | { 0, 0, 0 } | |
437 | }; | |
438 | ||
e0709f50 AC |
439 | io_reg_desc tmsk2_desc[] = { |
440 | { M6811_TOI, "TOI ", "Timer Overflow Interrupt Enable" }, | |
441 | { M6811_RTII, "RTII ", "RTI Interrupt Enable" }, | |
442 | { M6811_PAOVI, "PAOVI ", "Pulse Accumulator Overflow Interrupt Enable" }, | |
443 | { M6811_PAII, "PAII ", "Pulse Accumulator Interrupt Enable" }, | |
444 | { M6811_PR1, "PR1 ", "Timer prescaler (PR1)" }, | |
445 | { M6811_PR0, "PR0 ", "Timer prescaler (PR0)" }, | |
446 | { M6811_TPR_1, "TPR_1 ", "Timer prescaler div 1" }, | |
447 | { M6811_TPR_4, "TPR_4 ", "Timer prescaler div 4" }, | |
448 | { M6811_TPR_8, "TPR_8 ", "Timer prescaler div 8" }, | |
449 | { M6811_TPR_16, "TPR_16", "Timer prescaler div 16" }, | |
450 | { 0, 0, 0 } | |
451 | }; | |
452 | ||
453 | io_reg_desc tflg2_desc[] = { | |
454 | { M6811_TOF, "TOF ", "Timer Overflow Bit" }, | |
455 | { M6811_RTIF, "RTIF ", "Read Time Interrupt Flag" }, | |
456 | { M6811_PAOVF, "PAOVF ", "Pulse Accumulator Overflow Interrupt Flag" }, | |
457 | { M6811_PAIF, "PAIF ", "Pulse Accumulator Input Edge" }, | |
458 | { 0, 0, 0 } | |
459 | }; | |
460 | ||
461 | io_reg_desc pactl_desc[] = { | |
462 | { M6811_DDRA7, "DDRA7 ", "Data Direction for Port A bit-7" }, | |
463 | { M6811_PAEN, "PAEN ", "Pulse Accumulator System Enable" }, | |
464 | { M6811_PAMOD, "PAMOD ", "Pulse Accumulator Mode" }, | |
465 | { M6811_PEDGE, "PEDGE ", "Pulse Accumulator Edge Control" }, | |
466 | { M6811_RTR1, "RTR1 ", "RTI Interrupt rate select (RTR1)" }, | |
467 | { M6811_RTR0, "RTR0 ", "RTI Interrupt rate select (RTR0)" }, | |
468 | { 0, 0, 0 } | |
469 | }; | |
470 | ||
471 | static double | |
472 | to_realtime (sim_cpu *cpu, signed64 t) | |
473 | { | |
474 | return (double) (t) / (double) (cpu->cpu_frequency / 4); | |
475 | } | |
476 | ||
2990a9f4 | 477 | const char* |
a685700c | 478 | cycle_to_string (sim_cpu *cpu, signed64 t, int flags) |
2990a9f4 | 479 | { |
a685700c SC |
480 | char time_buf[32]; |
481 | char cycle_buf[32]; | |
2990a9f4 | 482 | static char buf[64]; |
86596dc8 | 483 | |
a685700c SC |
484 | time_buf[0] = 0; |
485 | cycle_buf[0] = 0; | |
486 | if (flags & PRINT_TIME) | |
487 | { | |
488 | double dt; | |
489 | ||
490 | dt = to_realtime (cpu, t); | |
491 | if (dt < 0.001) | |
492 | sprintf (time_buf, " (%3.1f us)", dt * 1000000.0); | |
493 | else if (dt < 1.0) | |
494 | sprintf (time_buf, " (%3.1f ms)", dt * 1000.0); | |
495 | else | |
496 | sprintf (time_buf, " (%3.1f s)", dt); | |
497 | } | |
2990a9f4 | 498 | |
a685700c SC |
499 | if (flags & PRINT_CYCLE) |
500 | sprintf (cycle_buf, " cycle%s", | |
501 | (t > 1 ? "s" : "")); | |
502 | ||
503 | if (t < LONG_MAX) | |
504 | sprintf (buf, "%9lu%s%s", (unsigned long) t, cycle_buf, time_buf); | |
505 | else | |
506 | sprintf (buf, "%llu%s%s", t, cycle_buf, time_buf); | |
2990a9f4 SC |
507 | return buf; |
508 | } | |
509 | ||
e0709f50 AC |
510 | static void |
511 | m68hc11tim_print_timer (struct hw *me, const char *name, | |
512 | struct hw_event *event) | |
513 | { | |
514 | SIM_DESC sd; | |
515 | ||
516 | sd = hw_system (me); | |
517 | if (event == 0) | |
518 | { | |
519 | sim_io_printf (sd, " No %s interrupt will be raised.\n", name); | |
520 | } | |
521 | else | |
522 | { | |
523 | signed64 t; | |
6f64fd48 | 524 | sim_cpu *cpu; |
e0709f50 AC |
525 | |
526 | cpu = STATE_CPU (sd, 0); | |
527 | ||
528 | t = hw_event_remain_time (me, event); | |
2990a9f4 | 529 | sim_io_printf (sd, " Next %s interrupt in %s\n", |
a685700c | 530 | name, cycle_to_string (cpu, t, PRINT_TIME | PRINT_CYCLE)); |
e0709f50 AC |
531 | } |
532 | } | |
533 | ||
534 | static void | |
535 | m68hc11tim_info (struct hw *me) | |
536 | { | |
537 | SIM_DESC sd; | |
538 | uint16 base = 0; | |
539 | sim_cpu *cpu; | |
540 | struct m68hc11tim *controller; | |
541 | uint8 val; | |
962e9d85 | 542 | uint16 val16; |
e0709f50 AC |
543 | |
544 | sd = hw_system (me); | |
545 | cpu = STATE_CPU (sd, 0); | |
546 | controller = hw_data (me); | |
547 | ||
548 | sim_io_printf (sd, "M68HC11 Timer:\n"); | |
549 | ||
550 | base = cpu_get_io_base (cpu); | |
551 | ||
962e9d85 SC |
552 | /* Info for TIC1 */ |
553 | val16 = (cpu->ios[M6811_TIC1_H] << 8) + cpu->ios[M6811_TIC1_L]; | |
554 | print_io_word (sd, "TIC1 ", 0, val16, base + M6811_TIC1); | |
555 | sim_io_printf (sd, "\n"); | |
556 | ||
557 | /* Info for TIC2 */ | |
558 | val16 = (cpu->ios[M6811_TIC2_H] << 8) + cpu->ios[M6811_TIC2_L]; | |
559 | print_io_word (sd, "TIC2 ", 0, val16, base + M6811_TIC2); | |
560 | sim_io_printf (sd, "\n"); | |
561 | ||
562 | /* Info for TIC3 */ | |
563 | val16 = (cpu->ios[M6811_TIC3_H] << 8) + cpu->ios[M6811_TIC3_L]; | |
564 | print_io_word (sd, "TIC3 ", 0, val16, base + M6811_TIC3); | |
565 | sim_io_printf (sd, "\n"); | |
566 | ||
567 | /* Info for TOC1 */ | |
568 | val16 = (cpu->ios[M6811_TOC1_H] << 8) + cpu->ios[M6811_TOC1_L]; | |
569 | print_io_word (sd, "TOC1 ", 0, val16, base + M6811_TOC1); | |
570 | sim_io_printf (sd, "\n"); | |
571 | ||
572 | /* Info for TOC2 */ | |
573 | val16 = (cpu->ios[M6811_TOC2_H] << 8) + cpu->ios[M6811_TOC2_L]; | |
574 | print_io_word (sd, "TOC2 ", 0, val16, base + M6811_TOC2); | |
575 | sim_io_printf (sd, "\n"); | |
576 | ||
577 | /* Info for TOC3 */ | |
578 | val16 = (cpu->ios[M6811_TOC3_H] << 8) + cpu->ios[M6811_TOC3_L]; | |
579 | print_io_word (sd, "TOC3 ", 0, val16, base + M6811_TOC3); | |
580 | sim_io_printf (sd, "\n"); | |
581 | ||
582 | /* Info for TOC4 */ | |
583 | val16 = (cpu->ios[M6811_TOC4_H] << 8) + cpu->ios[M6811_TOC4_L]; | |
584 | print_io_word (sd, "TOC4 ", 0, val16, base + M6811_TOC4); | |
585 | sim_io_printf (sd, "\n"); | |
586 | ||
587 | /* Info for TOC5 */ | |
588 | val16 = (cpu->ios[M6811_TOC5_H] << 8) + cpu->ios[M6811_TOC5_L]; | |
589 | print_io_word (sd, "TOC5 ", 0, val16, base + M6811_TOC5); | |
590 | sim_io_printf (sd, "\n"); | |
591 | ||
592 | /* Info for TMSK1 */ | |
593 | val = cpu->ios[M6811_TMSK1]; | |
594 | print_io_byte (sd, "TMSK1 ", tmsk1_desc, val, base + M6811_TMSK1); | |
595 | sim_io_printf (sd, "\n"); | |
596 | ||
597 | /* Info for TFLG1 */ | |
598 | val = cpu->ios[M6811_TFLG1]; | |
599 | print_io_byte (sd, "TFLG1", tflg1_desc, val, base + M6811_TFLG1); | |
600 | sim_io_printf (sd, "\n"); | |
601 | ||
e0709f50 AC |
602 | val = cpu->ios[M6811_TMSK2]; |
603 | print_io_byte (sd, "TMSK2 ", tmsk2_desc, val, base + M6811_TMSK2); | |
604 | sim_io_printf (sd, "\n"); | |
605 | ||
606 | val = cpu->ios[M6811_TFLG2]; | |
607 | print_io_byte (sd, "TFLG2", tflg2_desc, val, base + M6811_TFLG2); | |
608 | sim_io_printf (sd, "\n"); | |
609 | ||
610 | val = cpu->ios[M6811_PACTL]; | |
611 | print_io_byte (sd, "PACTL", pactl_desc, val, base + M6811_PACTL); | |
612 | sim_io_printf (sd, "\n"); | |
613 | ||
86596dc8 SC |
614 | val = cpu->ios[M6811_PACNT]; |
615 | print_io_byte (sd, "PACNT", 0, val, base + M6811_PACNT); | |
616 | sim_io_printf (sd, "\n"); | |
617 | ||
e0709f50 AC |
618 | /* Give info about the next timer interrupts. */ |
619 | m68hc11tim_print_timer (me, "RTI", controller->rti_timer_event); | |
620 | m68hc11tim_print_timer (me, "COP", controller->cop_timer_event); | |
621 | m68hc11tim_print_timer (me, "OVERFLOW", controller->tof_timer_event); | |
622 | m68hc11tim_print_timer (me, "COMPARE", controller->cmp_timer_event); | |
623 | } | |
624 | ||
625 | static int | |
626 | m68hc11tim_ioctl (struct hw *me, | |
627 | hw_ioctl_request request, | |
628 | va_list ap) | |
629 | { | |
630 | m68hc11tim_info (me); | |
631 | return 0; | |
632 | } | |
633 | ||
634 | /* generic read/write */ | |
635 | ||
636 | static unsigned | |
637 | m68hc11tim_io_read_buffer (struct hw *me, | |
638 | void *dest, | |
639 | int space, | |
640 | unsigned_word base, | |
641 | unsigned nr_bytes) | |
642 | { | |
643 | SIM_DESC sd; | |
644 | struct m68hc11tim *controller; | |
645 | sim_cpu *cpu; | |
646 | unsigned8 val; | |
401493c8 | 647 | unsigned cnt = 0; |
e0709f50 AC |
648 | |
649 | HW_TRACE ((me, "read 0x%08lx %d", (long) base, (int) nr_bytes)); | |
650 | ||
651 | sd = hw_system (me); | |
652 | cpu = STATE_CPU (sd, 0); | |
653 | controller = hw_data (me); | |
654 | ||
401493c8 | 655 | while (nr_bytes) |
e0709f50 | 656 | { |
401493c8 SC |
657 | switch (base) |
658 | { | |
659 | /* The cpu_absolute_cycle is updated after each instruction. | |
660 | Reading in a 16-bit register will be split in two accesses | |
661 | but this will be atomic within the simulator. */ | |
662 | case M6811_TCTN_H: | |
663 | val = (uint8) ((cpu->cpu_absolute_cycle - controller->tcnt_adjust) | |
664 | / (controller->clock_prescaler * 256)); | |
665 | break; | |
e0709f50 | 666 | |
401493c8 SC |
667 | case M6811_TCTN_L: |
668 | val = (uint8) ((cpu->cpu_absolute_cycle - controller->tcnt_adjust) | |
669 | / controller->clock_prescaler); | |
670 | break; | |
e0709f50 | 671 | |
401493c8 SC |
672 | default: |
673 | val = cpu->ios[base]; | |
674 | break; | |
675 | } | |
676 | *((unsigned8*) dest) = val; | |
a685700c | 677 | dest = (char*) dest + 1; |
401493c8 SC |
678 | base++; |
679 | nr_bytes--; | |
680 | cnt++; | |
e0709f50 | 681 | } |
401493c8 | 682 | return cnt; |
e0709f50 AC |
683 | } |
684 | ||
685 | static unsigned | |
686 | m68hc11tim_io_write_buffer (struct hw *me, | |
687 | const void *source, | |
688 | int space, | |
689 | unsigned_word base, | |
690 | unsigned nr_bytes) | |
691 | { | |
692 | SIM_DESC sd; | |
693 | struct m68hc11tim *controller; | |
694 | sim_cpu *cpu; | |
695 | unsigned8 val, n; | |
696 | signed64 adj; | |
697 | int reset_compare = 0; | |
401493c8 SC |
698 | int reset_overflow = 0; |
699 | int cnt = 0; | |
e0709f50 AC |
700 | |
701 | HW_TRACE ((me, "write 0x%08lx %d", (long) base, (int) nr_bytes)); | |
702 | ||
703 | sd = hw_system (me); | |
704 | cpu = STATE_CPU (sd, 0); | |
705 | controller = hw_data (me); | |
401493c8 SC |
706 | |
707 | while (nr_bytes) | |
e0709f50 | 708 | { |
401493c8 SC |
709 | val = *((const unsigned8*) source); |
710 | switch (base) | |
711 | { | |
712 | /* Set the timer counter low part, trying to preserve the low part. | |
713 | We compute the absolute cycle adjustment that we have to apply | |
714 | to obtain the timer current value. Computation must be made | |
715 | in 64-bit to avoid overflow problems. */ | |
716 | case M6811_TCTN_L: | |
717 | adj = ((cpu->cpu_absolute_cycle - controller->tcnt_adjust) | |
718 | / (controller->clock_prescaler * (signed64) 256)) & 0x0FF; | |
719 | adj = cpu->cpu_absolute_cycle | |
720 | - (adj * controller->clock_prescaler * (signed64) 256) | |
721 | - ((signed64) adj * controller->clock_prescaler); | |
722 | controller->tcnt_adjust = adj; | |
723 | reset_compare = 1; | |
724 | reset_overflow = 1; | |
725 | break; | |
e0709f50 | 726 | |
401493c8 SC |
727 | case M6811_TCTN_H: |
728 | adj = ((cpu->cpu_absolute_cycle - controller->tcnt_adjust) | |
729 | / controller->clock_prescaler) & 0x0ff; | |
730 | adj = cpu->cpu_absolute_cycle | |
731 | - ((signed64) val * controller->clock_prescaler * (signed64) 256) | |
732 | - (adj * controller->clock_prescaler); | |
733 | controller->tcnt_adjust = adj; | |
734 | reset_compare = 1; | |
735 | reset_overflow = 1; | |
736 | break; | |
e0709f50 | 737 | |
401493c8 | 738 | case M6811_TMSK2: |
e0709f50 | 739 | |
86596dc8 | 740 | /* Timer prescaler cannot be changed after 64 bus cycles. */ |
401493c8 SC |
741 | if (cpu->cpu_absolute_cycle >= 64) |
742 | { | |
743 | val &= ~(M6811_PR1 | M6811_PR0); | |
744 | val |= cpu->ios[M6811_TMSK2] & (M6811_PR1 | M6811_PR0); | |
745 | } | |
746 | switch (val & (M6811_PR1 | M6811_PR0)) | |
747 | { | |
748 | case 0: | |
749 | n = 1; | |
750 | break; | |
751 | case M6811_PR0: | |
752 | n = 4; | |
753 | break; | |
754 | case M6811_PR1: | |
755 | n = 8; | |
756 | break; | |
757 | default: | |
758 | case M6811_PR1 | M6811_PR0: | |
759 | n = 16; | |
760 | break; | |
761 | } | |
762 | if (cpu->cpu_absolute_cycle < 64) | |
763 | { | |
764 | reset_overflow = 1; | |
765 | controller->clock_prescaler = n; | |
766 | } | |
767 | cpu->ios[base] = val; | |
768 | interrupts_update_pending (&cpu->cpu_interrupts); | |
e0709f50 | 769 | break; |
e0709f50 | 770 | |
401493c8 SC |
771 | case M6811_PACTL: |
772 | n = (1 << ((val & (M6811_RTR1 | M6811_RTR0)))); | |
773 | cpu->ios[base] = val; | |
e0709f50 | 774 | |
401493c8 SC |
775 | controller->rti_delay = (long) (n) * 8192; |
776 | m68hc11tim_timer_event (me, (void*) (RTI_EVENT| 0x100)); | |
777 | break; | |
e0709f50 | 778 | |
401493c8 | 779 | case M6811_TFLG2: |
86596dc8 SC |
780 | val &= cpu->ios[M6811_TFLG2]; |
781 | cpu->ios[M6811_TFLG2] &= ~val; | |
782 | interrupts_update_pending (&cpu->cpu_interrupts); | |
783 | break; | |
e0709f50 | 784 | |
86596dc8 SC |
785 | case M6811_TMSK1: |
786 | cpu->ios[M6811_TMSK1] = val; | |
401493c8 | 787 | interrupts_update_pending (&cpu->cpu_interrupts); |
a685700c | 788 | reset_compare = 1; |
401493c8 | 789 | break; |
e0709f50 | 790 | |
86596dc8 SC |
791 | case M6811_TFLG1: |
792 | val &= cpu->ios[M6811_TFLG1]; | |
793 | cpu->ios[M6811_TFLG1] &= ~val; | |
794 | interrupts_update_pending (&cpu->cpu_interrupts); | |
795 | break; | |
796 | ||
401493c8 SC |
797 | case M6811_TOC1: |
798 | case M6811_TOC2: | |
799 | case M6811_TOC3: | |
800 | case M6811_TOC4: | |
801 | case M6811_TOC5: | |
802 | cpu->ios[base] = val; | |
803 | reset_compare = 1; | |
804 | break; | |
a685700c | 805 | |
86596dc8 SC |
806 | case M6811_TCTL1: |
807 | case M6811_TCTL2: | |
808 | cpu->ios[base] = val; | |
809 | break; | |
810 | ||
401493c8 | 811 | default: |
86596dc8 | 812 | cpu->ios[base] = val; |
401493c8 SC |
813 | break; |
814 | } | |
815 | ||
816 | base++; | |
817 | nr_bytes--; | |
818 | cnt++; | |
a685700c | 819 | source = (char*) source + 1; |
e0709f50 AC |
820 | } |
821 | ||
822 | /* Re-compute the next timer compare event. */ | |
823 | if (reset_compare) | |
824 | { | |
825 | m68hc11tim_timer_event (me, (void*) (COMPARE_EVENT)); | |
826 | } | |
401493c8 SC |
827 | if (reset_overflow) |
828 | { | |
829 | m68hc11tim_timer_event (me, (void*) (OVERFLOW_EVENT| 0x100)); | |
830 | } | |
831 | return cnt; | |
e0709f50 AC |
832 | } |
833 | ||
834 | ||
835 | const struct hw_descriptor dv_m68hc11tim_descriptor[] = { | |
b93775f5 SC |
836 | { "m68hc11tim", m68hc11tim_finish }, |
837 | { "m68hc12tim", m68hc11tim_finish }, | |
e0709f50 AC |
838 | { NULL }, |
839 | }; | |
840 |