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libc: Optimize malloc() initialization

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The BSPs provide memory for the separate C Program Heap initialization
via _Memory_Get().  Most BSPs provide exactly one memory area.  Only two
BSPs provide more than one memory area (arm/altera-cyclone-v and
bsps/powerpc/mpc55xxevb).  Only if more than one memory area is
provided, there is a need to use _Heap_Extend().  Provide two
implementations to initialize the separate C Program Heap and let the
BSP select one of the implementations based on the number of provided
memory areas.  This gets rid of a dependency on _Heap_Extend().  It
also avoids dead code sections for most BSPs.

Change licence to BSD-2-Clause according to file history.

Update #3053.
This commit is contained in:
Sebastian Huber
2020-04-08 17:14:41 +02:00
parent 3d0620b607
commit d7205f0083
19 changed files with 322 additions and 103 deletions
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49
bsps/shared/start/mallocinitmulti.c Normal file
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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup MallocSupport
*
* @brief This source file contains the _Workspace_Malloc_initialize_separate()
* implementation which supports more than one memory area.
*/
/*
* Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/mallocinitmulti.h>
#include <rtems/score/wkspacedata.h>
static Heap_Control _Malloc_Heap;
Heap_Control *_Workspace_Malloc_initialize_separate( void )
{
return _Malloc_Initialize_for_multiple_areas( &_Malloc_Heap );
}

49
bsps/shared/start/mallocinitone.c Normal file
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@@ -0,0 +1,49 @@
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup MallocSupport
*
* @brief This source file contains the _Workspace_Malloc_initialize_separate()
* implementation which supports exactly one memory area.
*/
/*
* Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/mallocinitone.h>
#include <rtems/score/wkspacedata.h>
static Heap_Control _Malloc_Heap;
Heap_Control *_Workspace_Malloc_initialize_separate( void )
{
return _Malloc_Initialize_for_one_area( &_Malloc_Heap );
}