bsps: Rework work area initialization

The work area initialization was done by the BSP through
bsp_work_area_initialize(). This approach predated the system
initialization through the system initialization linker set. The
workspace and C program heap were unconditionally initialized.  The aim
is to support RTEMS application configurations which do not need the
workspace and C program heap.  In these configurations, the workspace
and C prgram heap should not get initialized.

Change all bsp_work_area_initialize() to implement _Memory_Get()
instead.  Move the dirty memory, sbrk(), per-CPU data, workspace, and
malloc() heap initialization into separate system initialization steps.
This makes it also easier to test the individual initialization steps.

This change adds a dependency to _Heap_Extend() to all BSPs.  This
dependency will be removed in a follow up change.

Update #3838.

1 files changed, 24 insertions, 11 deletions

diff --git a/bsps/i386/pc386/start/bspgetworkarea.c b/bsps/i386/pc386/start/bspgetworkarea.c
index f869c38c5b..4838398e5c 100644
--- a/bsps/i386/pc386/start/bspgetworkarea.c
+++ b/bsps/i386/pc386/start/bspgetworkarea.c
@@ -1,8 +1,4 @@
 /*
- *  This routine is an implementation of the bsp_work_area_initialize()
- *  that can be used by all m68k BSPs following linkcmds conventions
- *  regarding heap, stack, and workspace allocation.
- *
  *  COPYRIGHT (c) 1989-2008.
  *  On-Line Applications Research Corporation (OAR).
  *
@@ -15,6 +11,8 @@
 #include <bsp.h>
 #include <bsp/bootcard.h>
 
+#include <rtems/sysinit.h>
+
 #ifdef BSP_GET_WORK_AREA_DEBUG
   #include <rtems/bspIo.h>
 #endif
@@ -116,17 +114,32 @@ static void bsp_size_memory(void)
   bsp_mem_size = topAddr;
 }
 
-void bsp_work_area_initialize(void)
-{
-  void *area_start;
-  uintptr_t area_size;
+static Memory_Area _Memory_Areas[ 1 ];
 
+static void bsp_memory_initialize( void )
+{
   /*
    *  We need to determine how much memory there is in the system.
    */
   bsp_size_memory();
 
-  area_start = (void *) rtemsWorkAreaStart;
-  area_size  = (uintptr_t) bsp_mem_size - (uintptr_t) rtemsWorkAreaStart;
-  bsp_work_area_initialize_default( area_start, area_size );
+  _Memory_Initialize_by_size(
+    &_Memory_Areas[0],
+    (void *) rtemsWorkAreaStart,
+    (uintptr_t) bsp_mem_size - (uintptr_t) rtemsWorkAreaStart
+  );
+}
+
+RTEMS_SYSINIT_ITEM(
+  bsp_memory_initialize,
+  RTEMS_SYSINIT_MEMORY,
+  RTEMS_SYSINIT_ORDER_MIDDLE
+);
+
+static const Memory_Information _Memory_Information =
+  MEMORY_INFORMATION_INITIALIZER( _Memory_Areas );
+
+const Memory_Information *_Memory_Get( void )
+{
+  return &_Memory_Information;
 }