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bsps: Rework work area initialization

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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.
This commit is contained in:
Sebastian Huber
2019-12-13 06:18:36 +01:00
parent 07e2eacf89
commit eea21eaca1
26 changed files with 557 additions and 378 deletions
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32
bsps/arm/imx/start/bspstarthooks.c
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@@ -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;
begin = imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].begin;
end = imx_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].end;
bsp_work_area_initialize_default((void *) begin, end - begin);
_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
);
static const Memory_Information _Memory_Information =
MEMORY_INFORMATION_INITIALIZER(_Memory_Areas);
const Memory_Information *_Memory_Get(void)
{
return &_Memory_Information;
}