source: rtems/cpukit/sapi/src/exinit.c @ 47a3cd8

4.11
Last change on this file since 47a3cd8 was 47a3cd8, checked in by Sebastian Huber <sebastian.huber@…>, on Aug 9, 2012 at 2:48:00 PM

score: Work area initialization API change

The work areas (RTEMS work space and C program heap) will be initialized
now in a separate step and are no longer part of
rtems_initialize_data_structures(). Initialization is performed with
tables of Heap_Area entries. This allows usage of scattered memory
areas present on various small scale micro-controllers.

The sbrk() support API changes also. The bsp_sbrk_init() must now deal
with a minimum size for the first memory chunk to take the configured
work space size into account.

  • Property mode set to 100644
File size: 6.0 KB
Line 
1/*
2 *  Initialization Manager
3 *
4 *  COPYRIGHT (c) 1989-2011.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 */
11
12#if HAVE_CONFIG_H
13#include "config.h"
14#endif
15
16/*
17 *  SCORE_INIT and SAPI_INIT are defined so all of the super core and
18 *  super API data will be included in this object file.
19 */
20
21#define SAPI_INIT
22#define SCORE_INIT
23
24#include <rtems/system.h>
25#include <rtems/config.h>
26#include <rtems/debug.h>
27#include <rtems/extension.h>
28#include <rtems/fatal.h>
29#include <rtems/init.h>
30#include <rtems/io.h>
31#include <rtems/score/sysstate.h>
32
33#include <rtems/score/apiext.h>
34#include <rtems/score/apimutex.h>
35#include <rtems/score/copyrt.h>
36#include <rtems/score/heap.h>
37#include <rtems/score/interr.h>
38#include <rtems/score/isr.h>
39#if defined(RTEMS_MULTIPROCESSING)
40#include <rtems/score/mpci.h>
41#endif
42#include <rtems/score/priority.h>
43#include <rtems/score/scheduler.h>
44#include <rtems/score/thread.h>
45#include <rtems/score/tod.h>
46#include <rtems/score/userext.h>
47#include <rtems/score/watchdog.h>
48#include <rtems/score/wkspace.h>
49
50#include <rtems/sptables.h>
51
52
53#include <rtems/rtems/rtemsapi.h>
54#ifdef RTEMS_POSIX_API
55  #include <rtems/posix/posixapi.h>
56#endif
57
58#if defined(RTEMS_SMP)
59  #include <rtems/score/smp.h>
60  #include <rtems/score/percpu.h>
61#endif
62
63Objects_Information *_Internal_Objects[ OBJECTS_INTERNAL_CLASSES_LAST + 1 ];
64
65void rtems_initialize_data_structures(void)
66{
67  /*
68   *  Dispatching and interrupts are disabled until the end of the
69   *  initialization sequence.  This prevents an inadvertent context
70   *  switch before the executive is initialized.
71   *
72   *  WARNING: Interrupts should have been disabled by the BSP and
73   *           are disabled by boot_card().
74   */
75
76  #if defined(RTEMS_MULTIPROCESSING)
77    /*
78     *  Initialize the system state based on whether this is an MP system.
79     *  In an MP configuration, internally we view single processor
80     *  systems as a very restricted multiprocessor system.
81     */
82    _Configuration_MP_table = Configuration.User_multiprocessing_table;
83
84    if ( _Configuration_MP_table == NULL ) {
85      _Configuration_MP_table =
86        (void *)&_Initialization_Default_multiprocessing_table;
87      _System_state_Handler_initialization( FALSE );
88    } else {
89      _System_state_Handler_initialization( TRUE );
90    }
91  #else
92    _System_state_Handler_initialization( FALSE );
93  #endif
94
95  /*
96   * Initialize any target architecture specific support as early as possible
97   */
98  _CPU_Initialize();
99
100  #if defined(RTEMS_MULTIPROCESSING)
101    _Objects_MP_Handler_early_initialization();
102  #endif
103
104  /*
105   *  Do this as early as possible to ensure no debugging output
106   *  is even attempted to be printed.
107   */
108  _Debug_Manager_initialization();
109
110  _API_extensions_Initialization();
111
112  _Thread_Dispatch_initialization();
113
114  #if defined(RTEMS_SMP)
115    _SMP_Handler_initialize();
116  #endif
117
118  _User_extensions_Handler_initialization();
119  _ISR_Handler_initialization();
120
121  /*
122   * Initialize the internal support API and allocator Mutex
123   */
124  _Objects_Information_table[OBJECTS_INTERNAL_API] = _Internal_Objects;
125
126  _API_Mutex_Initialization( 1 );
127  _API_Mutex_Allocate( &_RTEMS_Allocator_Mutex );
128
129  _Priority_bit_map_Handler_initialization();
130  _Watchdog_Handler_initialization();
131  _TOD_Handler_initialization();
132
133  _Thread_Handler_initialization();
134
135  _Scheduler_Handler_initialization();
136
137  #if defined(RTEMS_MULTIPROCESSING)
138    _Objects_MP_Handler_initialization();
139    _MPCI_Handler_initialization( RTEMS_TIMEOUT );
140  #endif
141
142/* MANAGERS */
143
144  _RTEMS_API_Initialize();
145
146  _Extension_Manager_initialization();
147
148  _IO_Manager_initialization();
149
150  #ifdef RTEMS_POSIX_API
151    _POSIX_API_Initialize();
152  #endif
153
154  /*
155   * Discover and initialize the secondary cores in an SMP system.
156   */
157  #if defined(RTEMS_SMP)
158    _SMP_Processor_count =
159        bsp_smp_initialize( rtems_configuration_smp_maximum_processors );
160  #endif
161
162  _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );
163
164  /*
165   *  No threads should be created before this point!!!
166   *  _Thread_Executing and _Thread_Heir are not set.
167   *
168   *  At this point all API extensions are in place.  After the call to
169   *  _Thread_Create_idle() _Thread_Executing and _Thread_Heir will be set.
170   */
171  _Thread_Create_idle();
172
173  /*
174   *  Scheduling can properly occur now as long as we avoid dispatching.
175   */
176}
177
178void rtems_initialize_before_drivers(void)
179{
180
181  #if defined(RTEMS_MULTIPROCESSING)
182    _MPCI_Create_server();
183  #endif
184
185  #if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
186    /*
187     *  Run the API and BSPs predriver hook.
188     */
189    _API_extensions_Run_predriver();
190  #endif
191}
192
193void rtems_initialize_device_drivers(void)
194{
195  /*
196   *  Initialize all the device drivers and initialize the MPCI layer.
197   *
198   *  NOTE:  The MPCI may be build upon a device driver.
199   */
200
201  _IO_Initialize_all_drivers();
202
203  #if defined(RTEMS_MULTIPROCESSING)
204    if ( _System_state_Is_multiprocessing ) {
205      _MPCI_Initialization();
206      _MPCI_Internal_packets_Send_process_packet(
207        MPCI_PACKETS_SYSTEM_VERIFY
208      );
209    }
210  #endif
211
212  /*
213   *  Run the APIs and BSPs postdriver hooks.
214   *
215   *  The API extensions are supposed to create user initialization tasks.
216   */
217  _API_extensions_Run_postdriver();
218}
219
220uint32_t rtems_initialize_start_multitasking(void)
221{
222  _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING );
223
224  _Thread_Start_multitasking();
225
226  /*******************************************************************
227   *******************************************************************
228   *******************************************************************
229   ******                 APPLICATION RUNS HERE                 ******
230   ******            RETURNS WHEN SYSTEM IS SHUT DOWN           ******
231   *******************************************************************
232   *******************************************************************
233   *******************************************************************/
234 
235  return _Per_CPU_Information[0].idle->Wait.return_code;
236}
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