source: rtems/cpukit/sapi/src/exinit.c @ c36fae22

Last change on this file since c36fae22 was c36fae22, checked in by Sebastian Huber <sebastian.huber@…>, on Feb 25, 2020 at 12:47:59 PM

config: Initialize IO drivers on demand

  • Property mode set to 100644
File size: 3.8 KB
Line 
1/**
2 * @file
3 *
4 * @brief Initialization Manager
5 *
6 * @ingroup ClassicRTEMS
7 */
8
9/*
10 *  COPYRIGHT (c) 1989-2014.
11 *  On-Line Applications Research Corporation (OAR).
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.org/license/LICENSE.
16 */
17
18#if HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <rtems/config.h>
23#include <rtems/extensionimpl.h>
24#include <rtems/init.h>
25#include <rtems/sysinit.h>
26#include <rtems/score/sysstate.h>
27
28#include <rtems/score/copyrt.h>
29#include <rtems/score/heap.h>
30#include <rtems/score/interr.h>
31#include <rtems/score/isr.h>
32#include <rtems/score/percpudata.h>
33#include <rtems/score/priority.h>
34#include <rtems/score/schedulerimpl.h>
35#include <rtems/score/smpimpl.h>
36#include <rtems/score/timecounter.h>
37#include <rtems/score/threadimpl.h>
38#include <rtems/score/todimpl.h>
39#include <rtems/score/wkspace.h>
40
41const char _Copyright_Notice[] =
42"COPYRIGHT (c) 1989-2008.\n\
43On-Line Applications Research Corporation (OAR).\n";
44
45static Objects_Information *
46_Internal_Objects[ OBJECTS_INTERNAL_CLASSES_LAST + 1 ];
47
48static Objects_Information *_RTEMS_Objects[ OBJECTS_RTEMS_CLASSES_LAST + 1 ];
49
50static Objects_Information *_POSIX_Objects[ OBJECTS_POSIX_CLASSES_LAST + 1 ];
51
52Objects_Information ** const
53_Objects_Information_table[ OBJECTS_APIS_LAST + 1 ] = {
54  NULL,
55  &_Internal_Objects[ 0 ],
56  &_RTEMS_Objects[ 0 ],
57  &_POSIX_Objects[ 0 ]
58};
59
60RTEMS_LINKER_RWSET(
61  _Per_CPU_Data,
62#if defined(RTEMS_SMP)
63  /*
64   * In SMP configurations, prevent false cache line sharing of per-processor
65   * data with a proper alignment.
66   */
67  RTEMS_ALIGNED( CPU_CACHE_LINE_BYTES )
68#endif
69  char
70);
71
72static void rtems_initialize_data_structures(void)
73{
74  /*
75   *  Dispatching and interrupts are disabled until the end of the
76   *  initialization sequence.  This prevents an inadvertent context
77   *  switch before the executive is initialized.
78   *
79   *  WARNING: Interrupts should have been disabled by the BSP and
80   *           are disabled by boot_card().
81   */
82
83  /*
84   * Initialize any target architecture specific support as early as possible
85   */
86  _CPU_Initialize();
87
88  _Thread_Dispatch_initialization();
89
90  _ISR_Handler_initialization();
91
92  _Thread_Handler_initialization();
93
94  _Scheduler_Handler_initialization();
95
96  _SMP_Handler_initialize();
97}
98
99RTEMS_LINKER_ROSET( _Sysinit, rtems_sysinit_item );
100
101RTEMS_SYSINIT_ITEM(
102  rtems_initialize_data_structures,
103  RTEMS_SYSINIT_DATA_STRUCTURES,
104  RTEMS_SYSINIT_ORDER_MIDDLE
105);
106
107/*
108 *  No threads should be created before this point!!!
109 *  _Thread_Executing and _Thread_Heir are not set.
110 *
111 *  At this point all API extensions are in place.  After the call to
112 *  _Thread_Create_idle() _Thread_Executing and _Thread_Heir will be set.
113 *
114 *  Scheduling can properly occur afterwards as long as we avoid dispatching.
115 */
116RTEMS_SYSINIT_ITEM(
117  _Thread_Create_idle,
118  RTEMS_SYSINIT_IDLE_THREADS,
119  RTEMS_SYSINIT_ORDER_MIDDLE
120);
121
122void rtems_initialize_executive(void)
123{
124  const rtems_sysinit_item *item;
125
126  /* Invoke the registered system initialization handlers */
127  RTEMS_LINKER_SET_FOREACH( _Sysinit, item ) {
128    ( *item->handler )();
129  }
130
131  _System_state_Set( SYSTEM_STATE_UP );
132
133  _SMP_Request_start_multitasking();
134
135  _Thread_Start_multitasking();
136
137  /*******************************************************************
138   *******************************************************************
139   *******************************************************************
140   ******                 APPLICATION RUNS HERE                 ******
141   ******              THE FUNCTION NEVER RETURNS               ******
142   *******************************************************************
143   *******************************************************************
144   *******************************************************************/
145}
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