forked from Imagelibrary/rtems
eea21eaca1
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.
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/**
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* @file
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*
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* This routine is an implementation of the _Memory_Get()
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* that can be used by all BSPs following linkcmds conventions
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* regarding heap, stack, and workspace allocation.
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*/
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/*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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*
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* Copyright (c) 2011-2012 embedded brains GmbH.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp.h>
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#include <bsp/bootcard.h>
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#if defined(HAS_UBOOT) && !defined(BSP_DISABLE_UBOOT_WORK_AREA_CONFIG)
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#define USE_UBOOT
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#endif
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/*
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* These are provided by the linkcmds for ALL of the BSPs which use this file.
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*/
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extern char WorkAreaBase[];
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/*
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* We may get the size information from U-Boot or the linker scripts.
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*/
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#ifdef USE_UBOOT
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#include <bsp/u-boot.h>
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#include <rtems/sysinit.h>
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static Memory_Area _Memory_Areas[ 1 ];
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static void bsp_memory_initialize( void )
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{
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char *end;
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end = (char *) bsp_uboot_board_info.bi_memstart
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+ bsp_uboot_board_info.bi_memsize;
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_Memory_Initialize( &_Memory_Areas[ 0 ], WorkAreaBase, end );
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}
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RTEMS_SYSINIT_ITEM(
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bsp_memory_initialize,
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RTEMS_SYSINIT_MEMORY,
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RTEMS_SYSINIT_ORDER_MIDDLE
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);
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#else /* !USE_UBOOT */
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extern char RamEnd[];
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static Memory_Area _Memory_Areas[] = {
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MEMORY_INITIALIZER(WorkAreaBase, RamEnd)
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};
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#endif /* USE_UBOOT */
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static const Memory_Information _Memory_Information =
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MEMORY_INFORMATION_INITIALIZER( _Memory_Areas );
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const Memory_Information *_Memory_Get( void )
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{
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return &_Memory_Information;
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}
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