forked from Imagelibrary/rtems
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSScoreCPUARM
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*
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* @brief This source file contains the implementation of
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* _CPU_Context_Initialize().
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*/
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/*
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* Copyright (c) 2011 Sebastian Huber. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <rtems/score/armv7m.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/tls.h>
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#ifdef ARM_MULTILIB_ARCH_V7M
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void _CPU_Context_Initialize(
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Context_Control *context,
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void *stack_area_begin,
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size_t stack_area_size,
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uint32_t new_level,
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void (*entry_point)( void ),
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bool is_fp,
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void *tls_area
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)
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{
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char *stack_area_end = (char *) stack_area_begin + stack_area_size;
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memset(context, 0, sizeof(*context));
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context->register_lr = entry_point;
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context->register_sp = stack_area_end;
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if ( tls_area != NULL ) {
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context->thread_id = (uint32_t) _TLS_Initialize_area( tls_area );
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}
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}
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#endif /* ARM_MULTILIB_ARCH_V7M */
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