score: Work area initialization API change

The work areas (RTEMS work space and C program heap) will be initialized
now in a separate step and are no longer part of
rtems_initialize_data_structures().  Initialization is performed with
tables of Heap_Area entries.  This allows usage of scattered memory
areas present on various small scale micro-controllers.

The sbrk() support API changes also.  The bsp_sbrk_init() must now deal
with a minimum size for the first memory chunk to take the configured
work space size into account.

1 files changed, 27 insertions, 0 deletions

diff --git a/cpukit/libcsupport/src/rtems_heap_null_extend.c b/cpukit/libcsupport/src/rtems_heap_null_extend.c
new file mode 100644
index 0000000000..a821ef48f9
--- /dev/null
+++ b/cpukit/libcsupport/src/rtems_heap_null_extend.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/malloc.h>
+
+void *rtems_heap_null_extend(
+  Heap_Control *heap __attribute__((unused)),
+  size_t alloc_size __attribute__((unused))
+)
+{
+  return NULL;
+}