source: rtems/cpukit/sapi/src/exinit.c @ 60b791ad

4.104.114.84.9
Last change on this file since 60b791ad was 60b791ad, checked in by Joel Sherrill <joel.sherrill@…>, on Feb 17, 1998 at 11:46:28 PM

updated copyright to 1998

  • Property mode set to 100644
File size: 7.2 KB
Line 
1/*
2 *  Initialization Manager
3 *
4 *  COPYRIGHT (c) 1989-1998.
5 *  On-Line Applications Research Corporation (OAR).
6 *  Copyright assigned to U.S. Government, 1994.
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.OARcorp.com/rtems/license.html.
11 *
12 *  $Id$
13 */
14
15/*
16 *  SCORE_INIT and SAPI_INIT are defined so all of the super core and
17 *  super API data will be included in this object file.
18 */
19
20#define SAPI_INIT
21#define SCORE_INIT
22
23#include <rtems/system.h>
24#include <rtems/config.h>
25#include <rtems/debug.h>
26#include <rtems/extension.h>
27#include <rtems/fatal.h>
28#include <rtems/init.h>
29#include <rtems/io.h>
30#include <rtems/score/sysstate.h>
31
32#include <rtems/score/apiext.h>
33#include <rtems/score/copyrt.h>
34#include <rtems/score/heap.h>
35#include <rtems/score/interr.h>
36#include <rtems/score/isr.h>
37#include <rtems/score/mpci.h>
38#include <rtems/score/priority.h>
39#include <rtems/score/thread.h>
40#include <rtems/score/tod.h>
41#include <rtems/score/userext.h>
42#include <rtems/score/watchdog.h>
43#include <rtems/score/wkspace.h>
44
45#include <rtems/directives.h>
46#include <rtems/sptables.h>
47
48
49#include <rtems/rtems/rtemsapi.h>
50#ifdef RTEMS_POSIX_API
51#include <rtems/posix/posixapi.h>
52#endif
53
54/*PAGE
55 *
56 *  rtems_initialize_executive
57 *
58 *  This directive initializes all the kernels data structures
59 *  to the states necessary for the kernel to begin execution.  All
60 *  include files that contain global variable definitions should be
61 *  included in this file.  The system threads and initialization threads
62 *  are created and started by this routine.  This routine then
63 *  initiates multithreading.
64 *
65 *  Input parameters:
66 *    configuration_table - pointer to the user's configuration table
67 *    cpu_table           - pointer to the user's CPU configuration table
68 *
69 *  Output parameters:  NONE
70 */
71
72void rtems_initialize_executive(
73  rtems_configuration_table *configuration_table,
74  rtems_cpu_table           *cpu_table
75)
76{
77  rtems_interrupt_level bsp_level;
78
79  bsp_level = rtems_initialize_executive_early(configuration_table, cpu_table);
80  rtems_initialize_executive_late( bsp_level );
81}
82
83rtems_interrupt_level rtems_initialize_executive_early(
84  rtems_configuration_table *configuration_table,
85  rtems_cpu_table           *cpu_table
86)
87{
88  rtems_interrupt_level        bsp_level;
89  rtems_multiprocessing_table *multiprocessing_table;
90
91  /*
92   *  Dispatching and interrupts are disabled until the end of the
93   *  initialization sequence.  This prevents an inadvertent context
94   *  switch before the executive is initialized.
95   */
96
97  _ISR_Disable( bsp_level );
98
99  if ( configuration_table == NULL )
100    _Internal_error_Occurred(
101      INTERNAL_ERROR_CORE,
102      TRUE,
103      INTERNAL_ERROR_NO_CONFIGURATION_TABLE
104    );
105
106  /*
107   *  Initialize the system state based on whether this is an MP system.
108   */
109
110  multiprocessing_table = configuration_table->User_multiprocessing_table;
111
112  _System_state_Handler_initialization(
113    (multiprocessing_table) ? TRUE : FALSE
114  );
115
116  /*
117   *  Provided just for user convenience.
118   */
119
120  _Configuration_Table    = configuration_table;
121  _Configuration_MP_table = multiprocessing_table;
122
123  /*
124   *  Internally we view single processor systems as a very restricted
125   *  multiprocessor system.
126   */
127
128  if ( multiprocessing_table == NULL )
129    multiprocessing_table = 
130      (void *)&_Initialization_Default_multiprocessing_table;
131
132  if ( cpu_table == NULL )
133    _Internal_error_Occurred(
134      INTERNAL_ERROR_CORE,
135      TRUE,
136      INTERNAL_ERROR_NO_CPU_TABLE
137    );
138
139  _CPU_Initialize( cpu_table, _Thread_Dispatch );
140
141  /*
142   *  Do this as early as possible to insure no debugging output
143   *  is even attempted to be printed.
144   */
145
146  _Debug_Manager_initialization();
147
148  _API_extensions_Initialization();
149
150  _Thread_Dispatch_initialization();
151
152  _User_extensions_Handler_initialization(
153    configuration_table->User_extension_table
154  );
155
156  _Workspace_Handler_initialization(
157     (void *)configuration_table->work_space_start,
158     configuration_table->work_space_size
159  );
160
161  _ISR_Handler_initialization();
162
163  _Objects_Handler_initialization(
164    multiprocessing_table->node,
165    multiprocessing_table->maximum_nodes,
166    multiprocessing_table->maximum_global_objects
167  );
168
169  _Priority_Handler_initialization();
170
171  _Watchdog_Handler_initialization();
172
173  _TOD_Handler_initialization( configuration_table->microseconds_per_tick );
174
175  _Thread_Handler_initialization(
176    configuration_table->ticks_per_timeslice,
177    configuration_table->maximum_extensions,
178    multiprocessing_table->maximum_proxies
179  );
180
181  _MPCI_Handler_initialization(
182    multiprocessing_table->User_mpci_table,
183    RTEMS_TIMEOUT
184  );
185
186/* MANAGERS */
187
188  _Extension_Manager_initialization( configuration_table->maximum_extensions );
189
190  _IO_Manager_initialization(
191    configuration_table->Device_driver_table,
192    configuration_table->number_of_device_drivers,
193    configuration_table->maximum_devices
194  );
195
196  _RTEMS_API_Initialize( configuration_table );
197
198#ifdef RTEMS_POSIX_API
199  _POSIX_API_Initialize( configuration_table );
200#endif
201
202  _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );
203
204  if ( cpu_table->pretasking_hook )
205    (*cpu_table->pretasking_hook)();
206
207  /*
208   *  No threads should be created before this point!!!
209   *
210   *  At this point all API extensions are in place.  After the call to
211   *  _Thread_Create_idle() _Thread_Executing will be set.
212   *  and _Thread_Heir are not set yet.
213   */
214
215  _Thread_Create_idle();
216
217  _MPCI_Create_server();
218
219  /*
220   *  Run the API and BSPs predriver hook.
221   */
222 
223  _API_extensions_Run_predriver();
224 
225  if ( _CPU_Table.predriver_hook )
226    (*_CPU_Table.predriver_hook)();
227 
228  /*
229   *  Initialize all the device drivers and initialize the MPCI layer.
230   *
231   *  NOTE:  The MPCI may be build upon a device driver.
232   */
233 
234  _IO_Initialize_all_drivers();
235 
236  if ( _System_state_Is_multiprocessing ) {
237    _MPCI_Initialization();
238    _MPCI_Internal_packets_Send_process_packet(
239      MPCI_PACKETS_SYSTEM_VERIFY
240    );
241  }
242 
243  /*
244   *  Run the APIs and BSPs postdriver hooks.
245   *
246   *  The API extensions are supposed to create user initialization tasks.
247   */
248 
249  _API_extensions_Run_postdriver();
250 
251  if ( _CPU_Table.postdriver_hook )
252    (*_CPU_Table.postdriver_hook)();
253
254  return bsp_level;
255}
256
257void rtems_initialize_executive_late(
258  rtems_interrupt_level bsp_level
259)
260{
261
262  _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING );
263
264  _Thread_Start_multitasking();
265
266  /*
267   *  Restore the interrupt level to what the BSP had.  Technically,
268   *  this is unnecessary since the BSP should have all interrupts
269   *  disabled when rtems_initialize_executive is invoked.  But this keeps
270   *  the ISR Disable/Enable calls paired.
271   */
272
273  _ISR_Enable( bsp_level );
274}
275
276/*PAGE
277 *
278 *  rtems_shutdown_executive
279 *
280 *  This kernel routine shutdowns the executive.  It halts multitasking
281 *  and returns control to the application execution "thread" which
282 *  initialially invoked the rtems_initialize_executive directive.
283 *
284 *  Input parameters:   NONE
285 *
286 *  Output parameters:  NONE
287 */
288
289void rtems_shutdown_executive(
290   unsigned32 result
291)
292{
293  if ( _System_state_Current != SYSTEM_STATE_SHUTDOWN ) {
294    _System_state_Set( SYSTEM_STATE_SHUTDOWN );
295    _Thread_Stop_multitasking();
296  }
297}
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