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[thirdparty/binutils-gdb.git] / sim / common / hw-handles.c
1 /* The common simulator framework for GDB, the GNU Debugger.
2
3 Copyright 2002, 2007 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
29 struct hw_handle_mapping {
30 cell_word external;
31 struct hw *phandle;
32 struct hw_instance *ihandle;
33 struct hw_handle_mapping *next;
34 };
35
36
37 struct hw_handle_data {
38 int nr_mappings;
39 struct hw_handle_mapping *mappings;
40 };
41
42 void
43 create_hw_handle_data (struct hw *hw)
44 {
45 if (hw_parent (hw) == NULL)
46 {
47 hw->handles_of_hw = HW_ZALLOC (hw, struct hw_handle_data);
48 }
49 else
50 {
51 hw->handles_of_hw = hw_root (hw)->handles_of_hw;
52 }
53 }
54
55 void
56 delete_hw_handle_data (struct hw *hw)
57 {
58 /* NULL */
59 }
60
61
62
63 #if 0
64 void
65 hw_handle_init (struct hw *hw)
66 {
67 struct hw_handle_mapping *current_map = db->mappings;
68 if (current_map != NULL)
69 {
70 db->nr_mappings = db->mappings->external;
71 /* verify that the mappings that were not removed are in
72 sequence down to nr 1 */
73 while (current_map->next != NULL)
74 {
75 if (current_map->external != current_map->next->external + 1)
76 error ("hw_handle: hw_handle database possibly corrupt");
77 current_map = current_map->next;
78 }
79 ASSERT (current_map->next == NULL);
80 if (current_map->external != 1)
81 error ("hw_handle: hw_handle database possibly corrupt");
82 }
83 else
84 {
85 db->nr_mappings = 0;
86 }
87 }
88 #endif
89
90
91 struct hw_instance *
92 hw_handle_ihandle2 (struct hw *hw,
93 cell_word external)
94 {
95 struct hw_handle_data *db = hw->handles_of_hw;
96 struct hw_handle_mapping *current_map = db->mappings;
97 while (current_map != NULL)
98 {
99 if (current_map->external == external)
100 return current_map->ihandle;
101 current_map = current_map->next;
102 }
103 return (void*)0;
104 }
105
106
107 struct hw *
108 hw_handle_phandle2 (struct hw *hw,
109 cell_word external)
110 {
111 struct hw_handle_data *db = hw->handles_of_hw;
112 struct hw_handle_mapping *current_map = db->mappings;
113 while (current_map != NULL)
114 {
115 if (current_map->external == external)
116 return current_map->phandle;
117 current_map = current_map->next;
118 }
119 return (void*)0;
120 }
121
122
123 cell_word
124 hw_handle_2ihandle (struct hw *hw,
125 struct hw_instance *internal)
126 {
127 struct hw_handle_data *db = hw->handles_of_hw;
128 struct hw_handle_mapping *current_map = db->mappings;
129 while (current_map != NULL)
130 {
131 if (current_map->ihandle == internal)
132 return current_map->external;
133 current_map = current_map->next;
134 }
135 return 0;
136 }
137
138
139 cell_word
140 hw_handle_2phandle (struct hw *hw,
141 struct hw *internal)
142 {
143 struct hw_handle_data *db = hw->handles_of_hw;
144 struct hw_handle_mapping *current_map = db->mappings;
145 while (current_map != NULL)
146 {
147 if (current_map->phandle == internal)
148 return current_map->external;
149 current_map = current_map->next;
150 }
151 return 0;
152 }
153
154
155 void
156 hw_handle_add_ihandle (struct hw *hw,
157 struct hw_instance *internal)
158 {
159 struct hw_handle_data *db = hw->handles_of_hw;
160 if (hw_handle_2ihandle (hw, internal) != 0)
161 {
162 hw_abort (hw, "attempting to add an ihandle already in the data base");
163 }
164 else
165 {
166 /* insert at the front making things in decending order */
167 struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping);
168 new_map->next = db->mappings;
169 new_map->ihandle = internal;
170 db->nr_mappings += 1;
171 new_map->external = db->nr_mappings;
172 db->mappings = new_map;
173 }
174 }
175
176
177 void
178 hw_handle_add_phandle (struct hw *hw,
179 struct hw *internal)
180 {
181 struct hw_handle_data *db = hw->handles_of_hw;
182 if (hw_handle_2phandle (hw, internal) != 0)
183 {
184 hw_abort (hw, "attempting to add a phandle already in the data base");
185 }
186 else
187 {
188 /* insert at the front making things in decending order */
189 struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping);
190 new_map->next = db->mappings;
191 new_map->phandle = internal;
192 db->nr_mappings += 1;
193 new_map->external = db->nr_mappings;
194 db->mappings = new_map;
195 }
196 }
197
198
199 void
200 hw_handle_remove_ihandle (struct hw *hw,
201 struct hw_instance *internal)
202 {
203 struct hw_handle_data *db = hw->handles_of_hw;
204 struct hw_handle_mapping **current_map = &db->mappings;
205 while (*current_map != NULL)
206 {
207 if ((*current_map)->ihandle == internal)
208 {
209 struct hw_handle_mapping *delete = *current_map;
210 *current_map = delete->next;
211 zfree (delete);
212 return;
213 }
214 current_map = &(*current_map)->next;
215 }
216 hw_abort (hw, "attempt to remove nonexistant ihandle");
217 }
218
219
220 void
221 hw_handle_remove_phandle (struct hw *hw,
222 struct hw *internal)
223 {
224 struct hw_handle_data *db = hw->handles_of_hw;
225 struct hw_handle_mapping **current_map = &db->mappings;
226 while (*current_map != NULL)
227 {
228 if ((*current_map)->phandle == internal)
229 {
230 struct hw_handle_mapping *delete = *current_map;
231 *current_map = delete->next;
232 zfree (delete);
233 return;
234 }
235 current_map = &(*current_map)->next;
236 }
237 hw_abort (hw, "attempt to remove nonexistant phandle");
238 }
239
240