Initial revision

1 files changed, 134 insertions, 0 deletions

diff --git a/sim/ppc/cap.c b/sim/ppc/cap.c
new file mode 100644
index 00000000000..a3be304c81f
--- /dev/null
+++ b/sim/ppc/cap.c
@@ -0,0 +1,134 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1995,1997, Andrew Cagney <cagney@highland.com.au>
+
+    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 2 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, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+
+#ifndef _CAP_C_
+#define _CAP_C_
+
+#include "cap.h"
+
+typedef struct _cap_mapping cap_mapping;
+struct _cap_mapping {
+  unsigned_cell external;
+  void *internal;
+  cap_mapping *next;
+};
+
+struct _cap {
+  int nr_mappings;
+  cap_mapping *mappings;
+};
+
+INLINE_CAP\
+(cap *)
+cap_create(const char *key)
+{
+  return ZALLOC(cap);
+}
+
+INLINE_CAP\
+(void)
+cap_init(cap *db)
+{
+  cap_mapping *current_map = db->mappings;
+  if (current_map != NULL) {
+    db->nr_mappings = db->mappings->external;
+    /* verify that the mappings that were not removed are in sequence
+       down to nr 1 */
+    while (current_map->next != NULL) {
+      if (current_map->external != current_map->next->external + 1)
+	error("cap: cap database possibly corrupt");
+      current_map = current_map->next;
+    }
+    ASSERT(current_map->next == NULL);
+    if (current_map->external != 1)
+      error("cap: cap database possibly currupt");
+  }
+  else {
+    db->nr_mappings = 0;
+  }
+}
+
+INLINE_CAP\
+(void *)
+cap_internal(cap *db,
+	     signed_cell external)
+{
+  cap_mapping *current_map = db->mappings;
+  while (current_map != NULL) {
+    if (current_map->external == external)
+      return current_map->internal;
+    current_map = current_map->next;
+  }
+  return (void*)0;
+}
+
+INLINE_CAP\
+(signed_cell)
+cap_external(cap *db,
+	     void *internal)
+{
+  cap_mapping *current_map = db->mappings;
+  while (current_map != NULL) {
+    if (current_map->internal == internal)
+      return current_map->external;
+    current_map = current_map->next;
+  }
+  return 0;
+}
+
+INLINE_CAP\
+(void)
+cap_add(cap *db,
+	void *internal)
+{
+  if (cap_external(db, internal) != 0) {
+    error("cap: attempting to add an object already in the data base");
+  }
+  else {
+    /* insert at the front making things in decending order */
+    cap_mapping *new_map = ZALLOC(cap_mapping);
+    new_map->next = db->mappings;
+    new_map->internal = internal;
+    db->nr_mappings += 1;
+    new_map->external = db->nr_mappings;
+    db->mappings = new_map;
+  }
+}
+
+INLINE_CAP\
+(void)
+cap_remove(cap *db,
+	   void *internal)
+{
+  cap_mapping **current_map = &db->mappings;
+  while (*current_map != NULL) {
+    if ((*current_map)->internal == internal) {
+      cap_mapping *delete = *current_map;
+      *current_map = delete->next;
+      zfree(delete);
+      return;
+    }
+    current_map = &(*current_map)->next;
+  }
+  error("cap: attempt to remove nonexistant internal object");
+}
+
+#endif