1 files changed, 118 insertions, 0 deletions
diff --git a/cpukit/rtems/src/regioncreate.c b/cpukit/rtems/src/regioncreate.c
new file mode 100644
index 0000000000..90aca79ea7
--- /dev/null
+++ b/cpukit/rtems/src/regioncreate.c
@@ -0,0 +1,118 @@
+/*
+ *  Region Manager
+ *
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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/rtems/status.h>
+#include <rtems/rtems/support.h>
+#include <rtems/score/object.h>
+#include <rtems/rtems/options.h>
+#include <rtems/rtems/region.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/apimutex.h>
+
+/*PAGE
+ *
+ *  rtems_region_create
+ *
+ *  This directive creates a region of physical contiguous memory area
+ *  from which variable sized segments can be allocated.
+ *
+ *  Input parameters:
+ *    name             - user defined region name
+ *    starting_address - physical start address of region
+ *    length           - physical length in bytes
+ *    page_size        - page size in bytes
+ *    attribute_set    - region attributes
+ *    id               - address of region id to set
+ *
+ *  Output parameters:
+ *    id               - region id
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code       - if unsuccessful
+ */
+
+rtems_status_code rtems_region_create(
+  rtems_name          name,
+  void               *starting_address,
+  uintptr_t           length,
+  uintptr_t           page_size,
+  rtems_attribute     attribute_set,
+  rtems_id           *id
+)
+{
+  rtems_status_code  return_status;
+  Region_Control    *the_region;
+
+  if ( !rtems_is_name_valid( name ) )
+    return RTEMS_INVALID_NAME;
+
+  if ( !starting_address )
+    return RTEMS_INVALID_ADDRESS;
+
+  if ( !id )
+    return RTEMS_INVALID_ADDRESS;
+
+  _RTEMS_Lock_allocator();                      /* to prevent deletion */
+
+    the_region = _Region_Allocate();
+
+    if ( !the_region )
+      return_status = RTEMS_TOO_MANY;
+
+    else {
+
+      the_region->maximum_segment_size = _Heap_Initialize(
+        &the_region->Memory, starting_address, length, page_size
+      );
+
+      if ( !the_region->maximum_segment_size ) {
+        _Region_Free( the_region );
+        return_status = RTEMS_INVALID_SIZE;
+      }
+
+      else {
+
+        the_region->starting_address      = starting_address;
+        the_region->length                = length;
+        the_region->page_size             = page_size;
+        the_region->attribute_set         = attribute_set;
+        the_region->number_of_used_blocks = 0;
+
+        _Thread_queue_Initialize(
+          &the_region->Wait_queue,
+          _Attributes_Is_priority( attribute_set ) ?
+             THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
+          STATES_WAITING_FOR_SEGMENT,
+          RTEMS_TIMEOUT
+        );
+
+        _Objects_Open(
+          &_Region_Information,
+          &the_region->Object,
+          (Objects_Name) name
+        );
+
+        *id = the_region->Object.id;
+        return_status = RTEMS_SUCCESSFUL;
+      }
+    }
+
+  _RTEMS_Unlock_allocator();
+  return return_status;
+}