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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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36
bsps/sparc/shared/start/bspgetworkarea.c
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@@ -13,19 +13,33 @@
#include <bsp.h>
#include <bsp/bootcard.h>
#include <rtems/sysinit.h>
/* Tells us where to put the workspace in case remote debugger is present. */
extern uint32_t rdb_start;
extern uintptr_t rdb_start;
/*
* This method returns the base address and size of the area which
* is to be allocated between the RTEMS Workspace and the C Program
* Heap.
*/
void bsp_work_area_initialize(void)
static Memory_Area _Memory_Areas[ 1 ];
static const Memory_Information _Memory_Information =
MEMORY_INFORMATION_INITIALIZER( _Memory_Areas );
static void bsp_memory_initialize( void )
{
/* Early dynamic memory allocator is placed just above _end */
void *work_area_start = (void *)&end;
uintptr_t work_area_size = (uintptr_t)rdb_start - (uintptr_t)work_area_start;
void *begin;
uintptr_t size;
bsp_work_area_initialize_default(work_area_start, work_area_size);
begin = &end;
size = rdb_start - (uintptr_t)begin;
_Memory_Initialize_by_size( &_Memory_Areas[ 0 ], begin, size );
}
RTEMS_SYSINIT_ITEM(
bsp_memory_initialize,
RTEMS_SYSINIT_MEMORY,
RTEMS_SYSINIT_ORDER_MIDDLE
);
const Memory_Information *_Memory_Get( void )
{
return &_Memory_Information;
}