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, 21 insertions, 5 deletions

diff --git a/bsps/powerpc/tqm8xx/start/bspgetworkarea.c b/bsps/powerpc/tqm8xx/start/bspgetworkarea.c
index 4a0a4db534..e5cd59e0de 100644
--- a/bsps/powerpc/tqm8xx/start/bspgetworkarea.c
+++ b/bsps/powerpc/tqm8xx/start/bspgetworkarea.c
@@ -24,11 +24,27 @@
 #include <bsp/bootcard.h>
 #include <bsp/linker-symbols.h>
 
-void bsp_work_area_initialize(void)
+#include <rtems/sysinit.h>
+
+static Memory_Area _Memory_Areas[1];
+
+static const Memory_Information _Memory_Information =
+  MEMORY_INFORMATION_INITIALIZER(_Memory_Areas);
+
+static void bsp_memory_initialize(void)
 {
-  char *ram_end = (char *) (TQM_BD_INFO.sdram_size - (uint32_t)TopRamReserved);
-  void *area_start = bsp_section_work_begin;
-  uintptr_t area_size = (uintptr_t) ram_end - (uintptr_t) area_start;
+  void *end = (void *) (TQM_BD_INFO.sdram_size - (uintptr_t)TopRamReserved);
 
-  bsp_work_area_initialize_default( area_start, area_size );
+  _Memory_Initialize(&_Memory_Areas[0], bsp_section_work_begin, end);
+}
+
+RTEMS_SYSINIT_ITEM(
+  bsp_memory_initialize,
+  RTEMS_SYSINIT_MEMORY,
+  RTEMS_SYSINIT_ORDER_MIDDLE
+);
+
+const Memory_Information *_Memory_Get(void)
+{
+  return &_Memory_Information;
 }