samples/minimum/init.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  Minimum Size Application Initialization
0007  */
0008
0009 /*
0010  *  COPYRIGHT (c) 1989-2012.
0011  *  On-Line Applications Research Corporation (OAR).
0012  *
0013  * Redistribution and use in source and binary forms, with or without
0014  * modification, are permitted provided that the following conditions
0015  * are met:
0016  * 1. Redistributions of source code must retain the above copyright
0017  *    notice, this list of conditions and the following disclaimer.
0018  * 2. Redistributions in binary form must reproduce the above copyright
0019  *    notice, this list of conditions and the following disclaimer in the
0020  *    documentation and/or other materials provided with the distribution.
0021  *
0022  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0023  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0024  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0025  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0026  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0027  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0028  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0029  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0030  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0031  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0032  * POSSIBILITY OF SUCH DAMAGE.
0033  */
0034
0035 #ifdef HAVE_CONFIG_H
0036 #include "config.h"
0037 #endif
0038
0039 #include <bsp.h>
0040 #include <rtems/score/thread.h>
0041
0042 static void *Init( uintptr_t ignored )
0043 {
0044   /* initialize application */
0045
0046   /* Real application would call idle loop functionality */
0047
0048   /* but in this case, just return and fall into a fatal error */
0049
0050   return NULL;
0051 }
0052
0053 /* configuration information */
0054
0055 /*
0056  * This application has no device drivers.
0057  */
0058 /* NOTICE: the clock driver is explicitly disabled */
0059 #define CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER
0060
0061 /*
0062  *  This application has no filesytem and libio support.
0063  */
0064 #define CONFIGURE_APPLICATION_DISABLE_FILESYSTEM
0065
0066 /*
0067  *  This disables reentrancy support in the C Library.  It is usually
0068  *  not something an application wants to do unless the development
0069  *  team is committed to using C Library routines that are KNOWN to
0070  *  be reentrant.  Caveat Emptor!!
0071  */
0072 #define CONFIGURE_DISABLE_NEWLIB_REENTRANCY
0073
0074 /*
0075  *  This test does not use any stdio.
0076  */
0077 #define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS 0
0078
0079 /*
0080  *  This may prevent us from running on every architecture but it
0081  *  demonstrates that the user can specify how small of a minimum
0082  *  stack they want.
0083  */
0084 #ifdef RTEMS_GCOV_COVERAGE
0085 #define CONFIGURE_MINIMUM_TASK_STACK_SIZE \
0086   (CPU_STACK_MINIMUM_SIZE - CPU_STACK_ALIGNMENT)
0087 #else
0088 #define CONFIGURE_MINIMUM_TASK_STACK_SIZE 512
0089 #endif
0090
0091 /*
0092  * Keep the interrupt/initialization stack as is.  Otherwise, the test may fail
0093  * in the low level system initialization.
0094  */
0095 #ifdef BSP_INTERRUPT_STACK_SIZE
0096   #define CONFIGURE_INTERRUPT_STACK_SIZE BSP_INTERRUPT_STACK_SIZE
0097 #else
0098   #define CONFIGURE_INTERRUPT_STACK_SIZE CPU_STACK_MINIMUM_SIZE
0099 #endif
0100
0101 /*
0102  *  This lowers the number of priorities that this test is able to
0103  *  use.  The Idle task will be running at the lowest priority.
0104  */
0105 #define CONFIGURE_MAXIMUM_PRIORITY 15
0106
0107 /*
0108  *  In this application, the initialization task performs the system
0109  *  initialization and then transforms itself into the idle task.
0110  */
0111 #define CONFIGURE_IDLE_TASK_BODY Init
0112 #define CONFIGURE_IDLE_TASK_INITIALIZES_APPLICATION
0113
0114 /*
0115  *  If you are debugging confdefs.h, define this
0116  */
0117 /* #define CONFIGURE_CONFDEFS_DEBUG */
0118
0119 /*
0120  *  Instantiate the configuration tables.
0121  */
0122 #define CONFIGURE_INIT
0123
0124 #include <rtems/confdefs.h>
0125
0126 /* global variables */