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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [sim/] [mn10300/] [dv-mn103ser.c] - Blame information for rev 862

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1 227 jeremybenn
/*  This file is part of the program GDB, the GNU debugger.
2
 
3
    Copyright (C) 1998, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4
    Contributed by Cygnus Solutions.
5
 
6
    This program is free software; you can redistribute it and/or modify
7
    it under the terms of the GNU General Public License as published by
8
    the Free Software Foundation; either version 3 of the License, or
9
    (at your option) any later version.
10
 
11
    This program is distributed in the hope that it will be useful,
12
    but WITHOUT ANY WARRANTY; without even the implied warranty of
13
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
    GNU General Public License for more details.
15
 
16
    You should have received a copy of the GNU General Public License
17
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
18
 
19
    */
20
 
21
#include "sim-main.h"
22
#include "hw-main.h"
23
#include "dv-sockser.h"
24
 
25
 
26
/* DEVICE
27
 
28
 
29
   mn103ser - mn103002 serial devices 0, 1 and 2.
30
 
31
 
32
   DESCRIPTION
33
 
34
   Implements the mn103002 serial interfaces as described in the
35
   mn103002 user guide.
36
 
37
 
38
   PROPERTIES
39
 
40
   reg = <serial-addr> <serial-size>
41
 
42
 
43
   BUGS
44
 
45
   */
46
 
47
 
48
/* The serial devices' registers' address block */
49
 
50
struct mn103ser_block {
51
  unsigned_word base;
52
  unsigned_word bound;
53
};
54
 
55
 
56
 
57
enum serial_register_types {
58
    SC0CTR,
59
    SC1CTR,
60
    SC2CTR,
61
    SC0ICR,
62
    SC1ICR,
63
    SC2ICR,
64
    SC0TXB,
65
    SC1TXB,
66
    SC2TXB,
67
    SC0RXB,
68
    SC1RXB,
69
    SC2RXB,
70
    SC0STR,
71
    SC1STR,
72
    SC2STR,
73
    SC2TIM,
74
};
75
 
76
 
77
/* Access dv-sockser state */
78
extern char* sockser_addr;
79
#define USE_SOCKSER_P (sockser_addr != NULL)
80
 
81
 
82
#define NR_SERIAL_DEVS  3
83
#define SIO_STAT_RRDY 0x0010
84
 
85
typedef struct _mn10300_serial {
86
  unsigned16 status, control;
87
  unsigned8  txb, rxb, intmode;
88
  struct hw_event *event;
89
} mn10300_serial;
90
 
91
 
92
 
93
struct mn103ser {
94
  struct mn103ser_block block;
95
  mn10300_serial device[NR_SERIAL_DEVS];
96
  unsigned8      serial2_timer_reg;
97
  do_hw_poll_read_method *reader;
98
};
99
 
100
/* output port ID's */
101
 
102
/* for mn103002 */
103
enum {
104
  SERIAL0_RECEIVE,
105
  SERIAL1_RECEIVE,
106
  SERIAL2_RECEIVE,
107
  SERIAL0_SEND,
108
  SERIAL1_SEND,
109
  SERIAL2_SEND,
110
};
111
 
112
 
113
static const struct hw_port_descriptor mn103ser_ports[] = {
114
 
115
  { "serial-0-receive",  SERIAL0_RECEIVE, 0, output_port, },
116
  { "serial-1-receive",  SERIAL1_RECEIVE, 0, output_port, },
117
  { "serial-2-receive",  SERIAL2_RECEIVE, 0, output_port, },
118
  { "serial-0-transmit", SERIAL0_SEND, 0, output_port, },
119
  { "serial-1-transmit", SERIAL1_SEND, 0, output_port, },
120
  { "serial-2-transmit", SERIAL2_SEND, 0, output_port, },
121
 
122
  { NULL, },
123
};
124
 
125
 
126
 
127
/* Finish off the partially created hw device.  Attach our local
128
   callbacks.  Wire up our port names etc */
129
 
130
static hw_io_read_buffer_method mn103ser_io_read_buffer;
131
static hw_io_write_buffer_method mn103ser_io_write_buffer;
132
 
133
static void
134
attach_mn103ser_regs (struct hw *me,
135
                      struct mn103ser *serial)
136
{
137
  unsigned_word attach_address;
138
  int attach_space;
139
  unsigned attach_size;
140
  reg_property_spec reg;
141
 
142
  if (hw_find_property (me, "reg") == NULL)
143
    hw_abort (me, "Missing \"reg\" property");
144
 
145
  if (!hw_find_reg_array_property (me, "reg", 0, &reg))
146
    hw_abort (me, "\"reg\" property must contain three addr/size entries");
147
  hw_unit_address_to_attach_address (hw_parent (me),
148
                                     &reg.address,
149
                                     &attach_space,
150
                                     &attach_address,
151
                                     me);
152
  serial->block.base = attach_address;
153
  hw_unit_size_to_attach_size (hw_parent (me),
154
                               &reg.size,
155
                               &attach_size, me);
156
  serial->block.bound = attach_address + (attach_size - 1);
157
  hw_attach_address (hw_parent (me),
158
                     0,
159
                     attach_space, attach_address, attach_size,
160
                     me);
161
}
162
 
163
static void
164
mn103ser_finish (struct hw *me)
165
{
166
  struct mn103ser *serial;
167
  int i;
168
 
169
  serial = HW_ZALLOC (me, struct mn103ser);
170
  set_hw_data (me, serial);
171
  set_hw_io_read_buffer (me, mn103ser_io_read_buffer);
172
  set_hw_io_write_buffer (me, mn103ser_io_write_buffer);
173
  set_hw_ports (me, mn103ser_ports);
174
 
175
  /* Attach ourself to our parent bus */
176
  attach_mn103ser_regs (me, serial);
177
 
178
  /* If so configured, enable polled input */
179
  if (hw_find_property (me, "poll?") != NULL
180
      && hw_find_boolean_property (me, "poll?"))
181
    {
182
      serial->reader = sim_io_poll_read;
183
    }
184
  else
185
    {
186
      serial->reader = sim_io_read;
187
    }
188
 
189
  /* Initialize the serial device registers. */
190
  for ( i=0; i<NR_SERIAL_DEVS; ++i )
191
    {
192
      serial->device[i].txb = 0;
193
      serial->device[i].rxb = 0;
194
      serial->device[i].status = 0;
195
      serial->device[i].control = 0;
196
      serial->device[i].intmode = 0;
197
      serial->device[i].event = NULL;
198
    }
199
}
200
 
201
 
202
/* read and write */
203
 
204
static int
205
decode_addr (struct hw *me,
206
             struct mn103ser *serial,
207
             unsigned_word address)
208
{
209
  unsigned_word offset;
210
  offset = address - serial->block.base;
211
  switch (offset)
212
    {
213
    case 0x00: return SC0CTR;
214
    case 0x04: return SC0ICR;
215
    case 0x08: return SC0TXB;
216
    case 0x09: return SC0RXB;
217
    case 0x0C: return SC0STR;
218
    case 0x10: return SC1CTR;
219
    case 0x14: return SC1ICR;
220
    case 0x18: return SC1TXB;
221
    case 0x19: return SC1RXB;
222
    case 0x1C: return SC1STR;
223
    case 0x20: return SC2CTR;
224
    case 0x24: return SC2ICR;
225
    case 0x28: return SC2TXB;
226
    case 0x29: return SC2RXB;
227
    case 0x2C: return SC2STR;
228
    case 0x2D: return SC2TIM;
229
    default:
230
      {
231
        hw_abort (me, "bad address");
232
        return -1;
233
      }
234
    }
235
}
236
 
237
static void
238
do_polling_event (struct hw *me,
239
                  void *data)
240
{
241
  struct mn103ser *serial = hw_data(me);
242
  long serial_reg = (long) data;
243
  char c;
244
  int count;
245
 
246
  if(USE_SOCKSER_P)
247
    {
248
      int rd;
249
      rd = dv_sockser_read (hw_system (me));
250
      if(rd != -1)
251
        {
252
          c = (char) rd;
253
          count = 1;
254
        }
255
      else
256
        {
257
          count = HW_IO_NOT_READY;
258
        }
259
    }
260
  else
261
    {
262
      count = do_hw_poll_read (me, serial->reader,
263
                               0/*STDIN*/, &c, sizeof(c));
264
    }
265
 
266
 
267
  switch (count)
268
    {
269
    case HW_IO_NOT_READY:
270
    case HW_IO_EOF:
271
      serial->device[serial_reg].rxb = 0;
272
      serial->device[serial_reg].status &= ~SIO_STAT_RRDY;
273
      break;
274
    default:
275
      serial->device[serial_reg].rxb = c;
276
      serial->device[serial_reg].status |= SIO_STAT_RRDY;
277
      hw_port_event (me, serial_reg+SERIAL0_RECEIVE, 1);
278
    }
279
 
280
  /* Schedule next polling event */
281
  serial->device[serial_reg].event
282
    = hw_event_queue_schedule (me, 1000,
283
                               do_polling_event, (void *)serial_reg);
284
 
285
}
286
 
287
static void
288
read_control_reg (struct hw *me,
289
                  struct mn103ser *serial,
290
                  unsigned_word serial_reg,
291
                  void *dest,
292
                  unsigned  nr_bytes)
293
{
294
  /* really allow 1 byte read, too */
295
  if ( nr_bytes == 2 )
296
    {
297
      *(unsigned16 *)dest = H2LE_2 (serial->device[serial_reg].control);
298
    }
299
  else
300
    {
301
      hw_abort (me, "bad read size of %d bytes from SC%dCTR.", nr_bytes,
302
                serial_reg);
303
    }
304
}
305
 
306
 
307
static void
308
read_intmode_reg (struct hw *me,
309
                  struct mn103ser *serial,
310
                  unsigned_word serial_reg,
311
                  void *dest,
312
                  unsigned  nr_bytes)
313
{
314
  if ( nr_bytes == 1 )
315
    {
316
      *(unsigned8 *)dest = serial->device[serial_reg].intmode;
317
    }
318
  else
319
    {
320
      hw_abort (me, "bad read size of %d bytes from SC%dICR.", nr_bytes,
321
                serial_reg);
322
    }
323
}
324
 
325
 
326
static void
327
read_txb (struct hw *me,
328
          struct mn103ser *serial,
329
          unsigned_word serial_reg,
330
          void *dest,
331
          unsigned  nr_bytes)
332
{
333
  if ( nr_bytes == 1 )
334
    {
335
      *(unsigned8 *)dest = serial->device[serial_reg].txb;
336
    }
337
  else
338
    {
339
      hw_abort (me, "bad read size of %d bytes from SC%dTXB.", nr_bytes,
340
                serial_reg);
341
    }
342
}
343
 
344
 
345
static void
346
read_rxb (struct hw *me,
347
          struct mn103ser *serial,
348
          unsigned_word serial_reg,
349
          void *dest,
350
          unsigned  nr_bytes)
351
{
352
  if ( nr_bytes == 1 )
353
    {
354
      *(unsigned8 *)dest = serial->device[serial_reg].rxb;
355
      /* Reception buffer is now empty. */
356
      serial->device[serial_reg].status &= ~SIO_STAT_RRDY;
357
    }
358
  else
359
    {
360
      hw_abort (me, "bad read size of %d bytes from SC%dRXB.", nr_bytes,
361
                serial_reg);
362
    }
363
}
364
 
365
 
366
static void
367
read_status_reg (struct hw *me,
368
                 struct mn103ser *serial,
369
                 unsigned_word serial_reg,
370
                 void *dest,
371
                 unsigned  nr_bytes)
372
{
373
  char c;
374
  int count;
375
 
376
  if ( (serial->device[serial_reg].status & SIO_STAT_RRDY) == 0 )
377
    {
378
      /* FIFO is empty */
379
      /* Kill current poll event */
380
      if ( NULL != serial->device[serial_reg].event )
381
        {
382
          hw_event_queue_deschedule (me, serial->device[serial_reg].event);
383
          serial->device[serial_reg].event = NULL;
384
        }
385
 
386
      if(USE_SOCKSER_P)
387
        {
388
          int rd;
389
          rd = dv_sockser_read (hw_system (me));
390
          if(rd != -1)
391
            {
392
              c = (char) rd;
393
              count = 1;
394
            }
395
          else
396
            {
397
              count = HW_IO_NOT_READY;
398
            }
399
        }
400
      else
401
        {
402
          count = do_hw_poll_read (me, serial->reader,
403
                                   0/*STDIN*/, &c, sizeof(c));
404
        }
405
 
406
      switch (count)
407
        {
408
        case HW_IO_NOT_READY:
409
        case HW_IO_EOF:
410
          serial->device[serial_reg].rxb = 0;
411
          serial->device[serial_reg].status &= ~SIO_STAT_RRDY;
412
          break;
413
        default:
414
          serial->device[serial_reg].rxb = c;
415
          serial->device[serial_reg].status |= SIO_STAT_RRDY;
416
          hw_port_event (me, serial_reg+SERIAL0_RECEIVE, 1);
417
        }
418
 
419
      /* schedule polling event */
420
      serial->device[serial_reg].event
421
        = hw_event_queue_schedule (me, 1000,
422
                                   do_polling_event,
423
                                   (void *) (long) serial_reg);
424
    }
425
 
426
  if ( nr_bytes == 1 )
427
    {
428
      *(unsigned8 *)dest = (unsigned8)serial->device[serial_reg].status;
429
    }
430
  else if ( nr_bytes == 2 && serial_reg != SC2STR )
431
    {
432
      *(unsigned16 *)dest = H2LE_2 (serial->device[serial_reg].status);
433
    }
434
  else
435
    {
436
      hw_abort (me, "bad read size of %d bytes from SC%dSTR.", nr_bytes,
437
                serial_reg);
438
    }
439
}
440
 
441
 
442
static void
443
read_serial2_timer_reg (struct hw *me,
444
                        struct mn103ser *serial,
445
                        void *dest,
446
                        unsigned  nr_bytes)
447
{
448
  if ( nr_bytes == 1 )
449
    {
450
      * (unsigned8 *) dest = (unsigned8) serial->serial2_timer_reg;
451
    }
452
  else
453
    {
454
      hw_abort (me, "bad read size of %d bytes to SC2TIM.", nr_bytes);
455
    }
456
}
457
 
458
 
459
static unsigned
460
mn103ser_io_read_buffer (struct hw *me,
461
                         void *dest,
462
                         int space,
463
                         unsigned_word base,
464
                         unsigned nr_bytes)
465
{
466
  struct mn103ser *serial = hw_data (me);
467
  enum serial_register_types serial_reg;
468
  HW_TRACE ((me, "read 0x%08lx %d", (long) base, (int) nr_bytes));
469
 
470
  serial_reg = decode_addr (me, serial, base);
471
  switch (serial_reg)
472
    {
473
    /* control registers */
474
    case SC0CTR:
475
    case SC1CTR:
476
    case SC2CTR:
477
      read_control_reg(me, serial, serial_reg-SC0CTR, dest, nr_bytes);
478
      HW_TRACE ((me, "read - ctrl reg%d has 0x%x\n", serial_reg-SC0CTR,
479
                 *(unsigned8 *)dest));
480
      break;
481
 
482
    /* interrupt mode registers */
483
    case SC0ICR:
484
    case SC1ICR:
485
    case SC2ICR:
486
      read_intmode_reg(me, serial, serial_reg-SC0ICR, dest, nr_bytes);
487
      HW_TRACE ((me, "read - intmode reg%d has 0x%x\n", serial_reg-SC0ICR,
488
                 *(unsigned8 *)dest));
489
      break;
490
 
491
    /* transmission buffers */
492
    case SC0TXB:
493
    case SC1TXB:
494
    case SC2TXB:
495
      read_txb(me, serial, serial_reg-SC0TXB, dest, nr_bytes);
496
      HW_TRACE ((me, "read - txb%d has %c\n", serial_reg-SC0TXB,
497
                 *(char *)dest));
498
      break;
499
 
500
    /* reception buffers */
501
    case SC0RXB:
502
    case SC1RXB:
503
    case SC2RXB:
504
      read_rxb(me, serial, serial_reg-SC0RXB, dest, nr_bytes);
505
      HW_TRACE ((me, "read - rxb%d has %c\n", serial_reg-SC0RXB,
506
                 *(char *)dest));
507
     break;
508
 
509
    /* status registers */
510
    case SC0STR:
511
    case SC1STR:
512
    case SC2STR:
513
      read_status_reg(me, serial, serial_reg-SC0STR, dest, nr_bytes);
514
      HW_TRACE ((me, "read - status reg%d has 0x%x\n", serial_reg-SC0STR,
515
                 *(unsigned8 *)dest));
516
      break;
517
 
518
    case SC2TIM:
519
      read_serial2_timer_reg(me, serial, dest, nr_bytes);
520
      HW_TRACE ((me, "read - serial2 timer reg %d\n", *(unsigned8 *)dest));
521
      break;
522
 
523
    default:
524
      hw_abort(me, "invalid address");
525
    }
526
 
527
  return nr_bytes;
528
}
529
 
530
 
531
static void
532
write_control_reg (struct hw *me,
533
                   struct mn103ser *serial,
534
                   unsigned_word serial_reg,
535
                   const void *source,
536
                   unsigned  nr_bytes)
537
{
538
  unsigned16 val = LE2H_2 (*(unsigned16 *)source);
539
 
540
  /* really allow 1 byte write, too */
541
  if ( nr_bytes == 2 )
542
    {
543
      if ( serial_reg == 2 && (val & 0x0C04) != 0 )
544
        {
545
          hw_abort(me, "Cannot write to read-only bits of SC2CTR.");
546
        }
547
      else
548
        {
549
          serial->device[serial_reg].control = val;
550
        }
551
    }
552
  else
553
    {
554
      hw_abort (me, "bad read size of %d bytes from SC%dSTR.", nr_bytes,
555
                serial_reg);
556
    }
557
}
558
 
559
 
560
static void
561
write_intmode_reg (struct hw *me,
562
                   struct mn103ser *serial,
563
                   unsigned_word serial_reg,
564
                   const void *source,
565
                   unsigned  nr_bytes)
566
{
567
unsigned8 val = *(unsigned8 *)source;
568
 
569
  if ( nr_bytes == 1 )
570
    {
571
      /* Check for attempt to write to read-only bits of register. */
572
      if ( ( serial_reg == 2 && (val & 0xCA) != 0 )
573
           || ( serial_reg != 2 && (val & 0x4A) != 0 ) )
574
        {
575
          hw_abort(me, "Cannot write to read-only bits of SC%dICR.",
576
                   serial_reg);
577
        }
578
      else
579
        {
580
          serial->device[serial_reg].intmode = val;
581
        }
582
    }
583
  else
584
    {
585
      hw_abort (me, "bad write size of %d bytes to SC%dICR.", nr_bytes,
586
                serial_reg);
587
    }
588
}
589
 
590
 
591
static void
592
write_txb (struct hw *me,
593
           struct mn103ser *serial,
594
           unsigned_word serial_reg,
595
           const void *source,
596
           unsigned  nr_bytes)
597
{
598
  if ( nr_bytes == 1 )
599
    {
600
      serial->device[serial_reg].txb = *(unsigned8 *)source;
601
 
602
      if(USE_SOCKSER_P)
603
        {
604
          dv_sockser_write(hw_system (me), * (char*) source);
605
        }
606
      else
607
        {
608
          sim_io_write_stdout(hw_system (me), (char *)source, 1);
609
          sim_io_flush_stdout(hw_system (me));
610
        }
611
 
612
      hw_port_event (me, serial_reg+SERIAL0_SEND, 1);
613
    }
614
  else
615
    {
616
      hw_abort (me, "bad write size of %d bytes to SC%dTXB.", nr_bytes,
617
                serial_reg);
618
    }
619
}
620
 
621
 
622
static void
623
write_serial2_timer_reg (struct hw *me,
624
                         struct mn103ser *serial,
625
                         const void *source,
626
                         unsigned  nr_bytes)
627
{
628
  if ( nr_bytes == 1 )
629
    {
630
      serial->serial2_timer_reg = *(unsigned8 *)source;
631
    }
632
  else
633
    {
634
      hw_abort (me, "bad write size of %d bytes to SC2TIM.", nr_bytes);
635
    }
636
}
637
 
638
 
639
static unsigned
640
mn103ser_io_write_buffer (struct hw *me,
641
                          const void *source,
642
                          int space,
643
                          unsigned_word base,
644
                          unsigned nr_bytes)
645
{
646
  struct mn103ser *serial = hw_data (me);
647
  enum serial_register_types serial_reg;
648
  HW_TRACE ((me, "write 0x%08lx %d", (long) base, (int) nr_bytes));
649
 
650
  serial_reg = decode_addr (me, serial, base);
651
  switch (serial_reg)
652
    {
653
    /* control registers */
654
    case SC0CTR:
655
    case SC1CTR:
656
    case SC2CTR:
657
      HW_TRACE ((me, "write - ctrl reg%d has 0x%x, nrbytes=%d.\n",
658
                 serial_reg-SC0CTR, *(unsigned8 *)source, nr_bytes));
659
      write_control_reg(me, serial, serial_reg-SC0CTR, source, nr_bytes);
660
      break;
661
 
662
    /* interrupt mode registers */
663
    case SC0ICR:
664
    case SC1ICR:
665
    case SC2ICR:
666
      HW_TRACE ((me, "write - intmode reg%d has 0x%x, nrbytes=%d.\n",
667
                 serial_reg-SC0ICR, *(unsigned8 *)source, nr_bytes));
668
      write_intmode_reg(me, serial, serial_reg-SC0ICR, source, nr_bytes);
669
      break;
670
 
671
    /* transmission buffers */
672
    case SC0TXB:
673
    case SC1TXB:
674
    case SC2TXB:
675
      HW_TRACE ((me, "write - txb%d has %c, nrbytes=%d.\n",
676
                 serial_reg-SC0TXB, *(char *)source, nr_bytes));
677
      write_txb(me, serial, serial_reg-SC0TXB, source, nr_bytes);
678
      break;
679
 
680
    /* reception buffers */
681
    case SC0RXB:
682
    case SC1RXB:
683
    case SC2RXB:
684
      hw_abort(me, "Cannot write to reception buffer.");
685
     break;
686
 
687
    /* status registers */
688
    case SC0STR:
689
    case SC1STR:
690
    case SC2STR:
691
      hw_abort(me, "Cannot write to status register.");
692
      break;
693
 
694
    case SC2TIM:
695
      HW_TRACE ((me, "read - serial2 timer reg %d (nrbytes=%d)\n",
696
                 *(unsigned8 *)source, nr_bytes));
697
      write_serial2_timer_reg(me, serial, source, nr_bytes);
698
      break;
699
 
700
    default:
701
      hw_abort(me, "invalid address");
702
    }
703
 
704
  return nr_bytes;
705
}
706
 
707
 
708
const struct hw_descriptor dv_mn103ser_descriptor[] = {
709
  { "mn103ser", mn103ser_finish, },
710
  { NULL },
711
};

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