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bsps/sparc: Simplify memory initialization

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Directly initialize the memory in the start sequence defined by start.S
instead of using a system initialization handler.  This avoids using the
global variable rdb_start which used a memory location which was shared
with _ERC32_MEC_Timer_Control_Mirror.  This change makes it possible to
use _Memory_Allocate() even before the system initialization is started.

Change license to BSD-2-Clause according to file history and
re-licensing agreement.

Update #3053.
This commit is contained in:
Sebastian Huber
2021-06-08 09:21:30 +02:00
parent ef5a53bcf8
commit 93afcff7b5
2 changed files with 39 additions and 34 deletions
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59
bsps/sparc/shared/start/bspgetworkarea.c
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@@ -1,44 +1,55 @@
/**
* @file
*
* @ingroup RTEMSScoreMemory
*
* @brief This source file contains an implementation of _Memory_Get().
*/
/*
* This set of routines are the BSP specific initialization
* support routines.
* SPDX-License-Identifier: BSD-2-Clause
*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
* Copyright (C) 2019, 2021 embedded brains GmbH
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
* 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.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <rtems/sysinit.h>
#include <rtems/score/memory.h>
/* Tells us where to put the workspace in case remote debugger is present. */
extern uintptr_t rdb_start;
/* This function is called only by the start sequence defined in start.S */
void _SPARC_Memory_initialize( void *end_of_usable_ram );
static Memory_Area _Memory_Areas[ 1 ];
static const Memory_Information _Memory_Information =
MEMORY_INFORMATION_INITIALIZER( _Memory_Areas );
static void bsp_memory_initialize( void )
void _SPARC_Memory_initialize( void *end_of_usable_ram )
{
void *begin;
uintptr_t size;
begin = &end;
size = rdb_start - (uintptr_t)begin;
_Memory_Initialize_by_size( &_Memory_Areas[ 0 ], begin, size );
_Memory_Initialize( &_Memory_Areas[ 0 ], &end, end_of_usable_ram );
}
RTEMS_SYSINIT_ITEM(
bsp_memory_initialize,
RTEMS_SYSINIT_MEMORY,
RTEMS_SYSINIT_ORDER_MIDDLE
);
const Memory_Information *_Memory_Get( void )
{
return &_Memory_Information;