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, 22 insertions, 6 deletions

diff --git a/bsps/arm/imx/start/bspstarthooks.c b/bsps/arm/imx/start/bspstarthooks.c
index 30e03dd788..868da5a192 100644
--- a/bsps/arm/imx/start/bspstarthooks.c
+++ b/bsps/arm/imx/start/bspstarthooks.c
@@ -22,6 +22,8 @@
 #include <bsp/arm-cp15-start.h>
 #include <bsp/arm-a9mpcore-start.h>
 
+#include <rtems/sysinit.h>
+
 #include <libfdt.h>
 
 BSP_START_DATA_SECTION static arm_cp15_start_section_config
@@ -106,13 +108,27 @@ BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
   bsp_start_clear_bss();
 }
 
-void bsp_work_area_initialize(void)
+static Memory_Area _Memory_Areas[1];
+
+static void bsp_memory_initialize(void)
 {
-  uintptr_t begin;
-  uintptr_t end;
+  _Memory_Initialize(
+    &_Memory_Areas[0],
+    imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].begin,
+    imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].end
+  );
+}
+
+RTEMS_SYSINIT_ITEM(
+  bsp_memory_initialize,
+  RTEMS_SYSINIT_MEMORY,
+  RTEMS_SYSINIT_ORDER_MIDDLE
+);
 
-  begin = imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].begin;
-  end = imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].end;
+static const Memory_Information _Memory_Information =
+  MEMORY_INFORMATION_INITIALIZER(_Memory_Areas);
 
-  bsp_work_area_initialize_default((void *) begin, end - begin);
+const Memory_Information *_Memory_Get(void)
+{
+  return &_Memory_Information;
 }