sim/common/hw-ports.c

   1 /* Hardware ports.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    Contributed by Andrew Cagney and Cygnus Solutions.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "hw-main.h"
  23 #include "hw-base.h"
  24
  25 #ifdef HAVE_STDLIB_H
  26 #include <stdlib.h>
  27 #endif
  28
  29 #ifdef HAVE_STRING_H
  30 #include <string.h>
  31 #else
  32 #ifdef HAVE_STRINGS_H
  33 #include <strings.h>
  34 #endif
  35 #endif
  36
  37 #include <ctype.h>
  38
  39 #define TRACE(x,y)
  40
  41
  42 struct hw_port_edge {
  43   int my_port;
  44   struct hw *dest;
  45   int dest_port;
  46   struct hw_port_edge *next;
  47   object_disposition disposition;
  48 };
  49
  50 struct hw_port_data {
  51   hw_port_event_method *to_port_event;
  52   const struct hw_port_descriptor *ports;
  53   struct hw_port_edge *edges;
  54 };
  55
  56 const struct hw_port_descriptor empty_hw_ports[] = {
  57   { NULL, },
  58 };
  59
  60 static void
  61 panic_hw_port_event (struct hw *me,
  62                      int my_port,
  63                      struct hw *source,
  64                      int source_port,
  65                      int level)
  66 {
  67   hw_abort (me, "no port method");
  68 }
  69
  70 void
  71 create_hw_port_data (struct hw *me)
  72 {
  73   me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data);
  74   set_hw_port_event (me, panic_hw_port_event);
  75   set_hw_ports (me, empty_hw_ports);
  76 }
  77
  78 void
  79 delete_hw_port_data (struct hw *me)
  80 {
  81   hw_free (me, me->ports_of_hw);
  82   me->ports_of_hw = NULL;
  83 }
  84
  85 void
  86 set_hw_ports (struct hw *me,
  87               const struct hw_port_descriptor ports[])
  88 {
  89   me->ports_of_hw->ports = ports;
  90 }
  91
  92 void
  93 set_hw_port_event (struct hw *me,
  94                    hw_port_event_method *port_event)
  95 {
  96   me->ports_of_hw->to_port_event = port_event;
  97 }
  98
  99
 100 static void
 101 attach_hw_port_edge (struct hw *me,
 102                      struct hw_port_edge **list,
 103                      int my_port,
 104                      struct hw *dest,
 105                      int dest_port,
 106                      object_disposition disposition)
 107 {
 108   struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge);
 109   new_edge->my_port = my_port;
 110   new_edge->dest = dest;
 111   new_edge->dest_port = dest_port;
 112   new_edge->next = *list;
 113   new_edge->disposition = disposition;
 114   *list = new_edge;
 115 }
 116
 117
 118 static void
 119 detach_hw_port_edge (struct hw *me,
 120                      struct hw_port_edge **list,
 121                      int my_port,
 122                      struct hw *dest,
 123                      int dest_port)
 124 {
 125   while (*list != NULL)
 126     {
 127       struct hw_port_edge *old_edge = *list;
 128       if (old_edge->dest == dest
 129           && old_edge->dest_port == dest_port
 130           && old_edge->my_port == my_port)
 131         {
 132           if (old_edge->disposition == permenant_object)
 133             hw_abort (me, "attempt to delete permenant port edge");
 134           *list = old_edge->next;
 135           hw_free (me, old_edge);
 136           return;
 137         }
 138     }
 139   hw_abort (me, "attempt to delete unattached port");
 140 }
 141
 142
 143 #if 0
 144 static void
 145 clean_hw_port_edges (struct hw_port_edge **list)
 146 {
 147   while (*list != NULL)
 148     {
 149       struct hw_port_edge *old_edge = *list;
 150       switch (old_edge->disposition)
 151         {
 152         case permenant_object:
 153           list = &old_edge->next;
 154           break;
 155         case temporary_object:
 156           *list = old_edge->next;
 157           hw_free (me, old_edge);
 158           break;
 159         }
 160     }
 161 }
 162 #endif
 163
 164
 165 /* Ports: */
 166
 167 void
 168 hw_port_event (struct hw *me,
 169                int my_port,
 170                int level)
 171 {
 172   int found_an_edge = 0;
 173   struct hw_port_edge *edge;
 174   /* device's lines directly connected */
 175   for (edge = me->ports_of_hw->edges;
 176        edge != NULL;
 177        edge = edge->next)
 178     {
 179       if (edge->my_port == my_port)
 180         {
 181           edge->dest->ports_of_hw->to_port_event (edge->dest,
 182                                                   edge->dest_port,
 183                                                   me,
 184                                                   my_port,
 185                                                   level);
 186           found_an_edge = 1;
 187         }
 188     }
 189   if (!found_an_edge)
 190     hw_abort (me, "No edge for port %d", my_port);
 191 }
 192
 193
 194 void
 195 hw_port_attach (struct hw *me,
 196                 int my_port,
 197                 struct hw *dest,
 198                 int dest_port,
 199                 object_disposition disposition)
 200 {
 201   attach_hw_port_edge (me,
 202                        &me->ports_of_hw->edges,
 203                        my_port,
 204                        dest,
 205                        dest_port,
 206                        disposition);
 207 }
 208
 209
 210 void
 211 hw_port_detach (struct hw *me,
 212                 int my_port,
 213                 struct hw *dest,
 214                 int dest_port)
 215 {
 216   detach_hw_port_edge (me,
 217                        &me->ports_of_hw->edges,
 218                        my_port,
 219                        dest,
 220                        dest_port);
 221 }
 222
 223
 224 void
 225 hw_port_traverse (struct hw *me,
 226                   hw_port_traverse_function *handler,
 227                   void *data)
 228 {
 229   struct hw_port_edge *port_edge;
 230   for (port_edge = me->ports_of_hw->edges;
 231        port_edge != NULL;
 232        port_edge = port_edge->next)
 233     {
 234       handler (me, port_edge->my_port,
 235                port_edge->dest, port_edge->dest_port,
 236                data);
 237     }
 238 }
 239
 240
 241 int
 242 hw_port_decode (struct hw *me,
 243                 const char *port_name,
 244                 port_direction direction)
 245 {
 246   if (port_name == NULL || port_name[0] == '\0')
 247     return 0;
 248   if (isdigit(port_name[0]))
 249     {
 250       return strtoul (port_name, NULL, 0);
 251     }
 252   else
 253     {
 254       const struct hw_port_descriptor *ports =
 255         me->ports_of_hw->ports;
 256       if (ports != NULL)
 257         {
 258           while (ports->name != NULL)
 259             {
 260               if (ports->direction == bidirect_port
 261                   || ports->direction == direction)
 262                 {
 263                   if (ports->nr_ports > 0)
 264                     {
 265                       int len = strlen (ports->name);
 266                       if (strncmp (port_name, ports->name, len) == 0)
 267                         {
 268                           if (port_name[len] == '\0')
 269                             return ports->number;
 270                           else if(isdigit (port_name[len]))
 271                             {
 272                               int port = (ports->number
 273                                           + strtoul (&port_name[len], NULL, 0));
 274                               if (port >= ports->number + ports->nr_ports)
 275                                 hw_abort (me,
 276                                           "Port %s out of range",
 277                                           port_name);
 278                               return port;
 279                             }
 280                         }
 281                     }
 282                   else if (strcmp (port_name, ports->name) == 0)
 283                     return ports->number;
 284                 }
 285               ports++;
 286             }
 287         }
 288     }
 289   hw_abort (me, "Unreconized port %s", port_name);
 290   return 0;
 291 }
 292
 293
 294 int
 295 hw_port_encode (struct hw *me,
 296                 int port_number,
 297                 char *buf,
 298                 int sizeof_buf,
 299                 port_direction direction)
 300 {
 301   const struct hw_port_descriptor *ports = NULL;
 302   ports = me->ports_of_hw->ports;
 303   if (ports != NULL) {
 304     while (ports->name != NULL)
 305       {
 306         if (ports->direction == bidirect_port
 307             || ports->direction == direction)
 308           {
 309             if (ports->nr_ports > 0)
 310               {
 311                 if (port_number >= ports->number
 312                     && port_number < ports->number + ports->nr_ports)
 313                   {
 314                     strcpy (buf, ports->name);
 315                     sprintf (buf + strlen(buf), "%d", port_number - ports->number);
 316                     if (strlen (buf) >= sizeof_buf)
 317                       hw_abort (me, "hw_port_encode: buffer overflow");
 318                     return strlen (buf);
 319                   }
 320               }
 321             else
 322               {
 323                 if (ports->number == port_number)
 324                   {
 325                     if (strlen(ports->name) >= sizeof_buf)
 326                       hw_abort (me, "hw_port_encode: buffer overflow");
 327                     strcpy(buf, ports->name);
 328                     return strlen(buf);
 329                   }
 330               }
 331           }
 332         ports++;
 333       }
 334   }
 335   sprintf (buf, "%d", port_number);
 336   if (strlen(buf) >= sizeof_buf)
 337     hw_abort (me, "hw_port_encode: buffer overflow");
 338   return strlen(buf);
 339 }