Dual-Ported Memory Manager split into one routine per file.

1 files changed, 82 insertions, 0 deletions

diff --git a/cpukit/rtems/src/dpmemcreate.c b/cpukit/rtems/src/dpmemcreate.c
new file mode 100644
index 0000000000..9e71d78365
--- /dev/null
+++ b/cpukit/rtems/src/dpmemcreate.c
@@ -0,0 +1,82 @@
+/*
+ *  Dual Port Memory Manager
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/rtems/status.h>
+#include <rtems/rtems/support.h>
+#include <rtems/score/address.h>
+#include <rtems/rtems/dpmem.h>
+#include <rtems/score/object.h>
+#include <rtems/score/thread.h>
+#include <rtems/rtems/dpmem.h>
+
+/*PAGE
+ *
+ *  rtems_port_create
+ *
+ *  This directive creates a port into a dual-ported memory area.
+ *
+ *  Input parameters:
+ *    name           - user defined port name
+ *    internal_start - internal start address of port
+ *    external_start - external start address of port
+ *    length         - physical length in bytes
+ *    id             - address of port id to set
+ *
+ *  Output parameters:
+ *    id       - port id
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code - if unsuccessful
+ */
+
+rtems_status_code rtems_port_create(
+  rtems_name    name,
+  void         *internal_start,
+  void         *external_start,
+  unsigned32    length,
+  Objects_Id   *id
+)
+{
+  register Dual_ported_memory_Control *the_port;
+
+  if ( !rtems_is_name_valid( name) )
+    return RTEMS_INVALID_NAME;
+
+  if ( !_Addresses_Is_aligned( internal_start ) ||
+       !_Addresses_Is_aligned( external_start ) )
+    return RTEMS_INVALID_ADDRESS;
+
+  _Thread_Disable_dispatch();             /* to prevent deletion */
+
+  the_port = _Dual_ported_memory_Allocate();
+
+  if ( !the_port ) {
+    _Thread_Enable_dispatch();
+    return RTEMS_TOO_MANY;
+  }
+
+  the_port->internal_base = internal_start;
+  the_port->external_base = external_start;
+  the_port->length        = length - 1;
+
+  _Objects_Open( 
+    &_Dual_ported_memory_Information,
+    &the_port->Object,
+    &name
+  );
+
+  *id = the_port->Object.id;
+  _Thread_Enable_dispatch();
+  return RTEMS_SUCCESSFUL;
+}