score/src/stackallocatorforidle.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreStack
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _Stack_Allocator_allocate_for_idle_static().
0010  */
0011
0012 /*
0013  * Copyright (C) 2021 On-Line Applications Research Corporation (OAR)
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/score/stack.h>
0042 #include <rtems/score/assert.h>
0043
0044 void *_Stack_Allocator_allocate_for_idle_static(
0045   uint32_t  cpu_index,
0046   size_t   *storage_size
0047 )
0048 {
0049   size_t size;
0050
0051   size = _Stack_Allocator_allocate_for_idle_storage_size;
0052   *storage_size = size;
0053 #if defined(RTEMS_SMP)
0054   return &_Stack_Allocator_allocate_for_idle_storage_areas[ cpu_index * size ];
0055 #else
0056   _Assert( cpu_index == 0 );
0057   return &_Stack_Allocator_allocate_for_idle_storage_areas[ 0 ];
0058 #endif
0059 }