RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

bsps: Rework work area initialization

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

35
bsps/i386/pc386/start/bspgetworkarea.c
View File

@@ -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;
}