mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-27 18:52:35 +08:00
Sebastian Huber
47a3cd8f73
The work areas (RTEMS work space and C program heap) will be initialized now in a separate step and are no longer part of rtems_initialize_data_structures(). Initialization is performed with tables of Heap_Area entries. This allows usage of scattered memory areas present on various small scale micro-controllers. The sbrk() support API changes also. The bsp_sbrk_init() must now deal with a minimum size for the first memory chunk to take the configured work space size into account.
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/**
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* @file
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*
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* @brief RTEMS_Malloc_Initialize() implementation.
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*/
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/*
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* COPYRIGHT (c) 1989-2012.
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* On-Line Applications Research Corporation (OAR).
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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.com/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/malloc.h>
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#include "malloc_p.h"
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#ifdef RTEMS_NEWLIB
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rtems_malloc_statistics_t rtems_malloc_statistics;
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void RTEMS_Malloc_Initialize(
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const Heap_Area *areas,
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size_t area_count,
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Heap_Initialization_or_extend_handler extend
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)
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{
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Heap_Control *heap = RTEMS_Malloc_Heap;
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if ( !rtems_configuration_get_unified_work_area() ) {
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Heap_Initialization_or_extend_handler init_or_extend = _Heap_Initialize;
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uintptr_t page_size = CPU_HEAP_ALIGNMENT;
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size_t i;
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for (i = 0; i < area_count; ++i) {
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const Heap_Area *area = &areas [i];
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uintptr_t space_available = (*init_or_extend)(
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heap,
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area->begin,
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area->size,
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page_size
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);
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if ( space_available > 0 ) {
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init_or_extend = extend;
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}
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}
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if ( init_or_extend == _Heap_Initialize ) {
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_Internal_error_Occurred(
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INTERNAL_ERROR_CORE,
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true,
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INTERNAL_ERROR_NO_MEMORY_FOR_HEAP
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);
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}
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}
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/*
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* If configured, initialize the statistics support
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*/
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if ( rtems_malloc_statistics_helpers != NULL ) {
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(*rtems_malloc_statistics_helpers->initialize)();
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}
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MSBUMP( space_available, _Protected_heap_Get_size( heap ) );
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}
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#else
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void RTEMS_Malloc_Initialize(
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Heap_Area *areas,
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size_t area_count,
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Heap_Initialization_or_extend_handler extend
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)
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{
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/* FIXME: Dummy function */
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}
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#endif
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