1 files changed, 61 insertions, 0 deletions
diff --git a/cpukit/score/src/chain.c b/cpukit/score/src/chain.c
new file mode 100644
index 0000000000..85821d4d71
--- /dev/null
+++ b/cpukit/score/src/chain.c
@@ -0,0 +1,61 @@
+/*
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/score/address.h>
+#include <rtems/score/chain.h>
+#include <rtems/score/isr.h>
+
+/*PAGE
+ *
+ *  _Chain_Initialize
+ *
+ *  This kernel routine initializes a doubly linked chain.
+ *
+ *  Input parameters:
+ *    the_chain        - pointer to chain header
+ *    starting_address - starting address of first node
+ *    number_nodes     - number of nodes in chain
+ *    node_size        - size of node in bytes
+ *
+ *  Output parameters:  NONE
+ */
+
+void _Chain_Initialize(
+  Chain_Control *the_chain,
+  void           *starting_address,
+  size_t         number_nodes,
+  size_t         node_size
+)
+{
+  size_t count = number_nodes;
+  Chain_Node *head = _Chain_Head( the_chain );
+  Chain_Node *tail = _Chain_Tail( the_chain );
+  Chain_Node *current = head;
+  Chain_Node *next = starting_address;
+
+  head->previous = NULL;
+
+  while ( count-- ) {
+    current->next  = next;
+    next->previous = current;
+    current        = next;
+    next           = (Chain_Node *)
+                        _Addresses_Add_offset( (void *) next, node_size );
+  }
+
+  current->next = tail;
+  tail->previous = current;
+}