summaryrefslogtreecommitdiff
path: root/sim/common/hw-base.c
blob: 1bbc424405149ac6c1e5084c64f52adba9b5ce79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
/* The common simulator framework for GDB, the GNU Debugger.

   Copyright 2002, 2007, 2008 Free Software Foundation, Inc.

   Contributed by Andrew Cagney and Red Hat.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */


#include "hw-main.h"
#include "hw-base.h"


#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif

#if HAVE_STDLIB_H
#include <stdlib.h>
#endif

#include <ctype.h>

#include "hw-config.h"

struct hw_base_data {
  int finished_p;
  const struct hw_descriptor *descriptor;
  hw_delete_callback *to_delete;
};

static int
generic_hw_unit_decode (struct hw *bus,
			const char *unit,
			hw_unit *phys)
{
  memset (phys, 0, sizeof (*phys));
  if (unit == NULL)
    return 0;
  else
    {
      int nr_cells = 0;
      const int max_nr_cells = hw_unit_nr_address_cells (bus);
      while (1)
	{
	  char *end = NULL;
	  unsigned long val;
	  val = strtoul (unit, &end, 0);
	  /* parse error? */
	  if (unit == end)
	    return -1;
	  /* two many cells? */
	  if (nr_cells >= max_nr_cells)
	    return -1;
	  /* save it */
	  phys->cells[nr_cells] = val;
	  nr_cells++;
	  unit = end;
	  /* more to follow? */
	  if (isspace (*unit) || *unit == '\0')
	    break;
	  if (*unit != ',')
	    return -1;
	  unit++;
	}
      if (nr_cells < max_nr_cells) {
	/* shift everything to correct position */
	int i;
	for (i = 1; i <= nr_cells; i++)
	  phys->cells[max_nr_cells - i] = phys->cells[nr_cells - i];
	for (i = 0; i < (max_nr_cells - nr_cells); i++)
	  phys->cells[i] = 0;
      }
      phys->nr_cells = max_nr_cells;
      return max_nr_cells;
  }
}

static int
generic_hw_unit_encode (struct hw *bus,
			const hw_unit *phys,
			char *buf,
			int sizeof_buf)
{
  int i;
  int len;
  char *pos = buf;
  /* skip leading zero's */
  for (i = 0; i < phys->nr_cells; i++)
    {
      if (phys->cells[i] != 0)
	break;
    }
  /* don't output anything if empty */
  if (phys->nr_cells == 0)
    {
      strcpy(pos, "");
      len = 0;
    }
  else if (i == phys->nr_cells)
    {
      /* all zero */
      strcpy(pos, "0");
      len = 1;
    }
  else
    {
      for (; i < phys->nr_cells; i++)
	{
	  if (pos != buf) {
	    strcat(pos, ",");
	    pos = strchr(pos, '\0');
	  }
	  if (phys->cells[i] < 10)
	    sprintf (pos, "%ld", (unsigned long)phys->cells[i]);
	  else
	    sprintf (pos, "0x%lx", (unsigned long)phys->cells[i]);
	  pos = strchr(pos, '\0');
	}
      len = pos - buf;
    }
  if (len >= sizeof_buf)
    hw_abort (NULL, "generic_unit_encode - buffer overflow\n");
  return len;
}

static int
generic_hw_unit_address_to_attach_address (struct hw *me,
					   const hw_unit *address,
					   int *attach_space,
					   unsigned_word *attach_address,
					   struct hw *client)
{
  int i;
  for (i = 0; i < address->nr_cells - 2; i++)
    {
      if (address->cells[i] != 0)
	hw_abort (me, "Only 32bit addresses supported");
    }
  if (address->nr_cells >= 2)
    *attach_space = address->cells[address->nr_cells - 2];
  else
    *attach_space = 0;
  *attach_address = address->cells[address->nr_cells - 1];
  return 1;
}

static int
generic_hw_unit_size_to_attach_size (struct hw *me,
				     const hw_unit *size,
				     unsigned *nr_bytes,
				     struct hw *client)
{
  int i;
  for (i = 0; i < size->nr_cells - 1; i++)
    {
      if (size->cells[i] != 0)
	hw_abort (me, "Only 32bit sizes supported");
    }
  *nr_bytes = size->cells[0];
  return *nr_bytes;
}


/* ignore/passthrough versions of each function */

static void
passthrough_hw_attach_address (struct hw *me,
			       int level,
			       int space,
			       address_word addr,
			       address_word nr_bytes,
			       struct hw *client) /*callback/default*/
{
  if (hw_parent (me) == NULL)
    hw_abort (client, "hw_attach_address: no parent attach method");
  hw_attach_address (hw_parent (me), level,
		     space, addr, nr_bytes,
		     client);
}

static void
passthrough_hw_detach_address (struct hw *me,
			       int level,
			       int space,
			       address_word addr,
			       address_word nr_bytes,
			       struct hw *client) /*callback/default*/
{
  if (hw_parent (me) == NULL)
    hw_abort (client, "hw_attach_address: no parent attach method");
  hw_detach_address (hw_parent (me), level,
		     space, addr, nr_bytes,
		     client);
}

static unsigned
panic_hw_io_read_buffer (struct hw *me,
			 void *dest,
			 int space,
			 unsigned_word addr,
			 unsigned nr_bytes)
{
  hw_abort (me, "no io-read method");
  return 0;
}

static unsigned
panic_hw_io_write_buffer (struct hw *me,
			  const void *source,
			  int space,
			  unsigned_word addr,
			  unsigned nr_bytes)
{
  hw_abort (me, "no io-write method");
  return 0;
}

static unsigned
passthrough_hw_dma_read_buffer (struct hw *me,
				void *dest,
				int space,
				unsigned_word addr,
				unsigned nr_bytes)
{
  if (hw_parent (me) == NULL)
    hw_abort (me, "no parent dma-read method");
  return hw_dma_read_buffer (hw_parent (me), dest,
			     space, addr, nr_bytes);
}

static unsigned
passthrough_hw_dma_write_buffer (struct hw *me,
				 const void *source,
				 int space,
				 unsigned_word addr,
				 unsigned nr_bytes,
				 int violate_read_only_section)
{
  if (hw_parent (me) == NULL)
    hw_abort (me, "no parent dma-write method");
  return hw_dma_write_buffer (hw_parent (me), source,
			      space, addr,
			      nr_bytes,
			      violate_read_only_section);
}

static void
ignore_hw_delete (struct hw *me)
{
  /* NOP */
}




static const char *
full_name_of_hw (struct hw *leaf,
		 char *buf,
		 unsigned sizeof_buf)
{
  /* get a buffer */
  char full_name[1024];
  if (buf == (char*)0)
    {
      buf = full_name;
      sizeof_buf = sizeof (full_name);
    }

  /* use head recursion to construct the path */

  if (hw_parent (leaf) == NULL)
    /* root */
    {
      if (sizeof_buf < 1)
	hw_abort (leaf, "buffer overflow");
      *buf = '\0';
    }
  else
    /* sub node */
    {
      char unit[1024];
      full_name_of_hw (hw_parent (leaf), buf, sizeof_buf);
      if (hw_unit_encode (hw_parent (leaf),
			  hw_unit_address (leaf),
			  unit + 1,
			  sizeof (unit) - 1)
	  > 0)
	unit[0] = '@';
      else
	unit[0] = '\0';
      if (strlen (buf) + strlen ("/") + strlen (hw_name (leaf)) + strlen (unit)
	  >= sizeof_buf)
	hw_abort (leaf, "buffer overflow");
      strcat (buf, "/");
      strcat (buf, hw_name (leaf));
      strcat (buf, unit);
    }
  
  /* return it usefully */
  if (buf == full_name)
    buf = hw_strdup (leaf, full_name);
  return buf;
}

struct hw *
hw_create (struct sim_state *sd,
	   struct hw *parent,
	   const char *family,
	   const char *name,
	   const char *unit,
	   const char *args)
{
 /* NOTE: HW must be allocated using ZALLOC, others use HW_ZALLOC */
  struct hw *hw = ZALLOC (struct hw);

  /* our identity */
  hw->family_of_hw = hw_strdup (hw, family);
  hw->name_of_hw = hw_strdup (hw, name);
  hw->args_of_hw = hw_strdup (hw, args);

  /* a hook into the system */
  if (sd != NULL)
    hw->system_of_hw = sd;
  else if (parent != NULL)
    hw->system_of_hw = hw_system (parent);
  else
    hw_abort (parent, "No system found");

  /* in a tree */
  if (parent != NULL)
    {
      struct hw **sibling = &parent->child_of_hw;
      while ((*sibling) != NULL)
	sibling = &(*sibling)->sibling_of_hw;
      *sibling = hw;
      hw->parent_of_hw = parent;
    }

  /* top of tree */
  if (parent != NULL)
    {
      struct hw *root = parent;
      while (root->parent_of_hw != NULL)
	root = root->parent_of_hw;
      hw->root_of_hw = root;
    }
  
  /* a unique identifier for the device on the parents bus */
  if (parent != NULL)
    {
      hw_unit_decode (parent, unit, &hw->unit_address_of_hw);
    }

  /* Determine our path */
  if (parent != NULL)
    hw->path_of_hw = full_name_of_hw (hw, NULL, 0);
  else
    hw->path_of_hw = "/";

  /* create our base type */
  hw->base_of_hw = HW_ZALLOC (hw, struct hw_base_data);
  hw->base_of_hw->finished_p = 0;

  /* our callbacks */
  set_hw_io_read_buffer (hw, panic_hw_io_read_buffer);
  set_hw_io_write_buffer (hw, panic_hw_io_write_buffer);
  set_hw_dma_read_buffer (hw, passthrough_hw_dma_read_buffer);
  set_hw_dma_write_buffer (hw, passthrough_hw_dma_write_buffer);
  set_hw_unit_decode (hw, generic_hw_unit_decode);
  set_hw_unit_encode (hw, generic_hw_unit_encode);
  set_hw_unit_address_to_attach_address (hw, generic_hw_unit_address_to_attach_address);
  set_hw_unit_size_to_attach_size (hw, generic_hw_unit_size_to_attach_size);
  set_hw_attach_address (hw, passthrough_hw_attach_address);
  set_hw_detach_address (hw, passthrough_hw_detach_address);
  set_hw_delete (hw, ignore_hw_delete);

  /* locate a descriptor */
  {
    const struct hw_descriptor **table;
    for (table = hw_descriptors;
	 *table != NULL;
	 table++)
      {
	const struct hw_descriptor *entry;
	for (entry = *table;
	     entry->family != NULL;
	     entry++)
	  {
	    if (strcmp (family, entry->family) == 0)
	      {
		hw->base_of_hw->descriptor = entry;
		break;
	      }
	  }
      }
    if (hw->base_of_hw->descriptor == NULL)
      {
	hw_abort (parent, "Unknown device `%s'", family);
      }
  }

  /* Attach dummy ports */
  create_hw_alloc_data (hw);
  create_hw_property_data (hw);
  create_hw_port_data (hw);
  create_hw_event_data (hw);
  create_hw_handle_data (hw);
  create_hw_instance_data (hw);
  
  return hw;
}


int
hw_finished_p (struct hw *me)
{
  return (me->base_of_hw->finished_p);
}

void
hw_finish (struct hw *me)
{
  if (hw_finished_p (me))
    hw_abort (me, "Attempt to finish finished device");

  /* Fill in the (hopefully) defined address/size cells values */
  if (hw_find_property (me, "#address-cells") != NULL)
    me->nr_address_cells_of_hw_unit =
      hw_find_integer_property (me, "#address-cells");
  else
    me->nr_address_cells_of_hw_unit = 2;
  if (hw_find_property (me, "#size-cells") != NULL)
    me->nr_size_cells_of_hw_unit =
      hw_find_integer_property (me, "#size-cells");
  else
    me->nr_size_cells_of_hw_unit = 1;

  /* Fill in the (hopefully) defined trace variable */
  if (hw_find_property (me, "trace?") != NULL)
    me->trace_of_hw_p = hw_find_boolean_property (me, "trace?");
  /* allow global variable to define default tracing */
  else if (! hw_trace_p (me)
	   && hw_find_property (hw_root (me), "global-trace?") != NULL
	   && hw_find_boolean_property (hw_root (me), "global-trace?"))
    me->trace_of_hw_p = 1;
    

  /* Allow the real device to override any methods */
  me->base_of_hw->descriptor->to_finish (me);
  me->base_of_hw->finished_p = 1;
}


void
hw_delete (struct hw *me)
{
  /* give the object a chance to tidy up */
  me->base_of_hw->to_delete (me);

  delete_hw_instance_data (me);
  delete_hw_handle_data (me);
  delete_hw_event_data (me);
  delete_hw_port_data (me);
  delete_hw_property_data (me);

  /* now unlink us from the tree */
  if (hw_parent (me))
    {
      struct hw **sibling = &hw_parent (me)->child_of_hw;
      while (*sibling != NULL)
	{
	  if (*sibling == me)
	    {
	      *sibling = me->sibling_of_hw;
	      me->sibling_of_hw = NULL;
	      me->parent_of_hw = NULL;
	      break;
	    }
	}
    }

  /* some sanity checks */
  if (hw_child (me) != NULL)
    {
      hw_abort (me, "attempt to delete device with children");
    }
  if (hw_sibling (me) != NULL)
    {
      hw_abort (me, "attempt to delete device with siblings");
    }

  /* blow away all memory belonging to the device */
  delete_hw_alloc_data (me);

  /* finally */
  zfree (me);
}

void
set_hw_delete (struct hw *hw, hw_delete_callback method)
{
  hw->base_of_hw->to_delete = method;
}


/* Go through the devices various reg properties for those that
   specify attach addresses */


void
do_hw_attach_regs (struct hw *hw)
{
  static const char *(reg_property_names[]) = {
    "attach-addresses",
    "assigned-addresses",
    "reg",
    "alternate-reg" ,
    NULL
  };
  const char **reg_property_name;
  int nr_valid_reg_properties = 0;
  for (reg_property_name = reg_property_names;
       *reg_property_name != NULL;
       reg_property_name++)
    {
      if (hw_find_property (hw, *reg_property_name) != NULL)
	{
	  reg_property_spec reg;
	  int reg_entry;
	  for (reg_entry = 0;
	       hw_find_reg_array_property (hw, *reg_property_name, reg_entry,
					   &reg);
	       reg_entry++)
	    {
	      unsigned_word attach_address;
	      int attach_space;
	      unsigned attach_size;
	      if (!hw_unit_address_to_attach_address (hw_parent (hw),
						      &reg.address,
						      &attach_space,
						      &attach_address,
						      hw))
		continue;
	      if (!hw_unit_size_to_attach_size (hw_parent (hw),
						&reg.size,
						&attach_size, hw))
		continue;
	      hw_attach_address (hw_parent (hw),
				 0,
				 attach_space, attach_address, attach_size,
				 hw);
	      nr_valid_reg_properties++;
	    }
	  /* if first option matches don't try for any others */
	  if (reg_property_name == reg_property_names)
	    break;
	}
    }
}