sim/common/hw-instances.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1998, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #include "hw-main.h"
  23 #include "hw-base.h"
  24
  25 #define ASSERT(X)
  26
  27 struct hw_instance_data {
  28   hw_finish_instance_method *to_finish;
  29   struct hw_instance *instances;
  30 };
  31
  32 static hw_finish_instance_method abort_hw_finish_instance;
  33
  34 void
  35 create_hw_instance_data (struct hw *me)
  36 {
  37   me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
  38   set_hw_finish_instance (me, abort_hw_finish_instance);
  39 }
  40
  41 void
  42 delete_hw_instance_data (struct hw *me)
  43 {
  44   /* NOP */
  45 }
  46
  47
  48 static void
  49 abort_hw_finish_instance (struct hw *hw,
  50                           struct hw_instance *instance)
  51 {
  52   hw_abort (hw, "no instance finish method");
  53 }
  54
  55 void
  56 set_hw_finish_instance (struct hw *me,
  57                         hw_finish_instance_method *finish)
  58 {
  59   me->instances_of_hw->to_finish = finish;
  60 }
  61
  62
  63 #if 0
  64 void
  65 clean_hw_instances (struct hw *me)
  66 {
  67   struct hw_instance **instance = &me->instances;
  68   while (*instance != NULL)
  69     {
  70       struct hw_instance *old_instance = *instance;
  71       hw_instance_delete (old_instance);
  72       instance = &me->instances;
  73     }
  74 }
  75 #endif
  76
  77
  78 void
  79 hw_instance_delete (struct hw_instance *instance)
  80 {
  81 #if 1
  82   hw_abort (hw_instance_hw (instance), "not implemented");
  83 #else
  84   struct hw *me = hw_instance_hw (instance);
  85   if (instance->to_instance_delete == NULL)
  86     hw_abort (me, "no delete method");
  87   instance->method->delete(instance);
  88   if (instance->args != NULL)
  89     zfree (instance->args);
  90   if (instance->path != NULL)
  91     zfree (instance->path);
  92   if (instance->child == NULL)
  93     {
  94       /* only remove leaf nodes */
  95       struct hw_instance **curr = &me->instances;
  96       while (*curr != instance)
  97         {
  98           ASSERT (*curr != NULL);
  99           curr = &(*curr)->next;
 100         }
 101       *curr = instance->next;
 102     }
 103   else
 104     {
 105       /* check it isn't in the instance list */
 106       struct hw_instance *curr = me->instances;
 107       while (curr != NULL)
 108         {
 109           ASSERT(curr != instance);
 110           curr = curr->next;
 111         }
 112       /* unlink the child */
 113       ASSERT (instance->child->parent == instance);
 114       instance->child->parent = NULL;
 115     }
 116   cap_remove (me->ihandles, instance);
 117   zfree (instance);
 118 #endif
 119 }
 120
 121
 122 static int
 123 panic_hw_instance_read (struct hw_instance *instance,
 124                         void *addr,
 125                         unsigned_word len)
 126 {
 127   hw_abort (hw_instance_hw (instance), "no read method");
 128   return -1;
 129 }
 130
 131
 132
 133 static int
 134 panic_hw_instance_write (struct hw_instance *instance,
 135                          const void *addr,
 136                          unsigned_word len)
 137 {
 138   hw_abort (hw_instance_hw (instance), "no write method");
 139   return -1;
 140 }
 141
 142
 143 static int
 144 panic_hw_instance_seek (struct hw_instance *instance,
 145                         unsigned_word pos_hi,
 146                         unsigned_word pos_lo)
 147 {
 148   hw_abort (hw_instance_hw (instance), "no seek method");
 149   return -1;
 150 }
 151
 152
 153 int
 154 hw_instance_call_method (struct hw_instance *instance,
 155                          const char *method_name,
 156                          int n_stack_args,
 157                          unsigned_cell stack_args[/*n_stack_args*/],
 158                          int n_stack_returns,
 159                          unsigned_cell stack_returns[/*n_stack_args*/])
 160 {
 161 #if 1
 162   hw_abort (hw_instance_hw (instance), "not implemented");
 163   return -1;
 164 #else
 165   struct hw *me = instance->owner;
 166   const hw_instance_methods *method = instance->method->methods;
 167   if (method == NULL)
 168     {
 169       hw_abort (me, "no methods (want %s)", method_name);
 170     }
 171   while (method->name != NULL)
 172     {
 173       if (strcmp(method->name, method_name) == 0)
 174         {
 175           return method->method (instance,
 176                                  n_stack_args, stack_args,
 177                                  n_stack_returns, stack_returns);
 178         }
 179       method++;
 180     }
 181   hw_abort (me, "no %s method", method_name);
 182   return 0;
 183 #endif
 184 }
 185
 186
 187 #define set_hw_instance_read(instance, method)\
 188 ((instance)->to_instance_read = (method))
 189
 190 #define set_hw_instance_write(instance, method)\
 191 ((instance)->to_instance_write = (method))
 192
 193 #define set_hw_instance_seek(instance, method)\
 194 ((instance)->to_instance_seek = (method))
 195
 196
 197 #if 0
 198 static void
 199 set_hw_instance_finish (struct hw *me,
 200                         hw_instance_finish_method *method)
 201 {
 202   if (me->instances_of_hw == NULL)
 203     me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
 204   me->instances_of_hw->to_finish = method;
 205 }
 206 #endif
 207
 208
 209 struct hw_instance *
 210 hw_instance_create (struct hw *me,
 211                     struct hw_instance *parent,
 212                     const char *path,
 213                     const char *args)
 214 {
 215   struct hw_instance *instance = ZALLOC (struct hw_instance);
 216   /*instance->unit*/
 217   /* link this instance into the devices list */
 218   instance->hw_of_instance = me;
 219   instance->parent_of_instance = NULL;
 220   /* link this instance into the front of the devices instance list */
 221   instance->sibling_of_instance = me->instances_of_hw->instances;
 222   me->instances_of_hw->instances = instance;
 223   if (parent != NULL)
 224     {
 225       ASSERT (parent->child_of_instance == NULL);
 226       parent->child_of_instance = instance;
 227       instance->parent_of_instance = parent;
 228     }
 229   instance->args_of_instance = hw_strdup (me, args);
 230   instance->path_of_instance = hw_strdup (me, path);
 231   set_hw_instance_read (instance, panic_hw_instance_read);
 232   set_hw_instance_write (instance, panic_hw_instance_write);
 233   set_hw_instance_seek (instance, panic_hw_instance_seek);
 234   hw_handle_add_ihandle (me, instance);
 235   me->instances_of_hw->to_finish (me, instance);
 236   return instance;
 237 }
 238
 239
 240 struct hw_instance *
 241 hw_instance_interceed (struct hw_instance *parent,
 242                        const char *path,
 243                        const char *args)
 244 {
 245 #if 1
 246   return NULL;
 247 #else
 248   struct hw_instance *instance = ZALLOC (struct hw_instance);
 249   /*instance->unit*/
 250   /* link this instance into the devices list */
 251   if (me != NULL)
 252     {
 253       ASSERT (parent == NULL);
 254       instance->hw_of_instance = me;
 255       instance->parent_of_instance = NULL;
 256       /* link this instance into the front of the devices instance list */
 257       instance->sibling_of_instance = me->instances_of_hw->instances;
 258       me->instances_of_hw->instances = instance;
 259     }
 260   if (parent != NULL)
 261     {
 262       struct hw_instance **previous;
 263       ASSERT (parent->child_of_instance == NULL);
 264       parent->child_of_instance = instance;
 265       instance->owner = parent->owner;
 266       instance->parent_of_instance = parent;
 267       /* in the devices instance list replace the parent instance with
 268          this one */
 269       instance->next = parent->next;
 270       /* replace parent with this new node */
 271       previous = &instance->owner->instances;
 272       while (*previous != parent)
 273         {
 274           ASSERT (*previous != NULL);
 275           previous = &(*previous)->next;
 276         }
 277       *previous = instance;
 278     }
 279   instance->data = data;
 280   instance->args = (args == NULL ? NULL : (char *) strdup(args));
 281   instance->path = (path == NULL ? NULL : (char *) strdup(path));
 282   cap_add (instance->owner->ihandles, instance);
 283   return instance;
 284 #endif
 285 }