sim/common/hw-instances.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney and Red Hat.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24
  25 #include "hw-main.h"
  26 #include "hw-base.h"
  27
  28 #include "sim-io.h"
  29 #include "sim-assert.h"
  30
  31 struct hw_instance_data {
  32   hw_finish_instance_method *to_finish;
  33   struct hw_instance *instances;
  34 };
  35
  36 static hw_finish_instance_method abort_hw_finish_instance;
  37
  38 void
  39 create_hw_instance_data (struct hw *me)
  40 {
  41   me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
  42   set_hw_finish_instance (me, abort_hw_finish_instance);
  43 }
  44
  45 void
  46 delete_hw_instance_data (struct hw *me)
  47 {
  48   /* NOP */
  49 }
  50
  51
  52 static void
  53 abort_hw_finish_instance (struct hw *hw,
  54                           struct hw_instance *instance)
  55 {
  56   hw_abort (hw, "no instance finish method");
  57 }
  58
  59 void
  60 set_hw_finish_instance (struct hw *me,
  61                         hw_finish_instance_method *finish)
  62 {
  63   me->instances_of_hw->to_finish = finish;
  64 }
  65
  66
  67 #if 0
  68 void
  69 clean_hw_instances (struct hw *me)
  70 {
  71   struct hw_instance **instance = &me->instances;
  72   while (*instance != NULL)
  73     {
  74       struct hw_instance *old_instance = *instance;
  75       hw_instance_delete (old_instance);
  76       instance = &me->instances;
  77     }
  78 }
  79 #endif
  80
  81
  82 void
  83 hw_instance_delete (struct hw_instance *instance)
  84 {
  85 #if 1
  86   hw_abort (hw_instance_hw (instance), "not implemented");
  87 #else
  88   struct hw *me = hw_instance_hw (instance);
  89   if (instance->to_instance_delete == NULL)
  90     hw_abort (me, "no delete method");
  91   instance->method->delete(instance);
  92   if (instance->args != NULL)
  93     zfree (instance->args);
  94   if (instance->path != NULL)
  95     zfree (instance->path);
  96   if (instance->child == NULL)
  97     {
  98       /* only remove leaf nodes */
  99       struct hw_instance **curr = &me->instances;
 100       while (*curr != instance)
 101         {
 102           ASSERT (*curr != NULL);
 103           curr = &(*curr)->next;
 104         }
 105       *curr = instance->next;
 106     }
 107   else
 108     {
 109       /* check it isn't in the instance list */
 110       struct hw_instance *curr = me->instances;
 111       while (curr != NULL)
 112         {
 113           ASSERT(curr != instance);
 114           curr = curr->next;
 115         }
 116       /* unlink the child */
 117       ASSERT (instance->child->parent == instance);
 118       instance->child->parent = NULL;
 119     }
 120   cap_remove (me->ihandles, instance);
 121   zfree (instance);
 122 #endif
 123 }
 124
 125
 126 static int
 127 panic_hw_instance_read (struct hw_instance *instance,
 128                         void *addr,
 129                         unsigned_word len)
 130 {
 131   hw_abort (hw_instance_hw (instance), "no read method");
 132   return -1;
 133 }
 134
 135
 136
 137 static int
 138 panic_hw_instance_write (struct hw_instance *instance,
 139                          const void *addr,
 140                          unsigned_word len)
 141 {
 142   hw_abort (hw_instance_hw (instance), "no write method");
 143   return -1;
 144 }
 145
 146
 147 static int
 148 panic_hw_instance_seek (struct hw_instance *instance,
 149                         unsigned_word pos_hi,
 150                         unsigned_word pos_lo)
 151 {
 152   hw_abort (hw_instance_hw (instance), "no seek method");
 153   return -1;
 154 }
 155
 156
 157 int
 158 hw_instance_call_method (struct hw_instance *instance,
 159                          const char *method_name,
 160                          int n_stack_args,
 161                          unsigned_cell stack_args[/*n_stack_args*/],
 162                          int n_stack_returns,
 163                          unsigned_cell stack_returns[/*n_stack_args*/])
 164 {
 165 #if 1
 166   hw_abort (hw_instance_hw (instance), "not implemented");
 167   return -1;
 168 #else
 169   struct hw *me = instance->owner;
 170   const hw_instance_methods *method = instance->method->methods;
 171   if (method == NULL)
 172     {
 173       hw_abort (me, "no methods (want %s)", method_name);
 174     }
 175   while (method->name != NULL)
 176     {
 177       if (strcmp(method->name, method_name) == 0)
 178         {
 179           return method->method (instance,
 180                                  n_stack_args, stack_args,
 181                                  n_stack_returns, stack_returns);
 182         }
 183       method++;
 184     }
 185   hw_abort (me, "no %s method", method_name);
 186   return 0;
 187 #endif
 188 }
 189
 190
 191 #define set_hw_instance_read(instance, method)\
 192 ((instance)->to_instance_read = (method))
 193
 194 #define set_hw_instance_write(instance, method)\
 195 ((instance)->to_instance_write = (method))
 196
 197 #define set_hw_instance_seek(instance, method)\
 198 ((instance)->to_instance_seek = (method))
 199
 200
 201 #if 0
 202 static void
 203 set_hw_instance_finish (struct hw *me,
 204                         hw_instance_finish_method *method)
 205 {
 206   if (me->instances_of_hw == NULL)
 207     me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
 208   me->instances_of_hw->to_finish = method;
 209 }
 210 #endif
 211
 212
 213 struct hw_instance *
 214 hw_instance_create (struct hw *me,
 215                     struct hw_instance *parent,
 216                     const char *path,
 217                     const char *args)
 218 {
 219   struct hw_instance *instance = ZALLOC (struct hw_instance);
 220   /*instance->unit*/
 221   /* link this instance into the devices list */
 222   instance->hw_of_instance = me;
 223   instance->parent_of_instance = NULL;
 224   /* link this instance into the front of the devices instance list */
 225   instance->sibling_of_instance = me->instances_of_hw->instances;
 226   me->instances_of_hw->instances = instance;
 227   if (parent != NULL)
 228     {
 229       ASSERT (parent->child_of_instance == NULL);
 230       parent->child_of_instance = instance;
 231       instance->parent_of_instance = parent;
 232     }
 233   instance->args_of_instance = hw_strdup (me, args);
 234   instance->path_of_instance = hw_strdup (me, path);
 235   set_hw_instance_read (instance, panic_hw_instance_read);
 236   set_hw_instance_write (instance, panic_hw_instance_write);
 237   set_hw_instance_seek (instance, panic_hw_instance_seek);
 238   hw_handle_add_ihandle (me, instance);
 239   me->instances_of_hw->to_finish (me, instance);
 240   return instance;
 241 }
 242
 243
 244 struct hw_instance *
 245 hw_instance_interceed (struct hw_instance *parent,
 246                        const char *path,
 247                        const char *args)
 248 {
 249 #if 1
 250   return NULL;
 251 #else
 252   struct hw_instance *instance = ZALLOC (struct hw_instance);
 253   /*instance->unit*/
 254   /* link this instance into the devices list */
 255   if (me != NULL)
 256     {
 257       ASSERT (parent == NULL);
 258       instance->hw_of_instance = me;
 259       instance->parent_of_instance = NULL;
 260       /* link this instance into the front of the devices instance list */
 261       instance->sibling_of_instance = me->instances_of_hw->instances;
 262       me->instances_of_hw->instances = instance;
 263     }
 264   if (parent != NULL)
 265     {
 266       struct hw_instance **previous;
 267       ASSERT (parent->child_of_instance == NULL);
 268       parent->child_of_instance = instance;
 269       instance->owner = parent->owner;
 270       instance->parent_of_instance = parent;
 271       /* in the devices instance list replace the parent instance with
 272          this one */
 273       instance->next = parent->next;
 274       /* replace parent with this new node */
 275       previous = &instance->owner->instances;
 276       while (*previous != parent)
 277         {
 278           ASSERT (*previous != NULL);
 279           previous = &(*previous)->next;
 280         }
 281       *previous = instance;
 282     }
 283   instance->data = data;
 284   instance->args = (args == NULL ? NULL : (char *) strdup(args));
 285   instance->path = (path == NULL ? NULL : (char *) strdup(path));
 286   cap_add (instance->owner->ihandles, instance);
 287   return instance;
 288 #endif
 289 }