source: rtems/c/src/lib/libbsp/a29k/portsw/startup/bspstart.c @ 0836603

4.104.114.84.95
Last change on this file since 0836603 was 0836603, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 18, 1996 at 9:13:10 PM

new files submitted by Craig Lebakken (lebakken@…) and Derrick Ostertag
(ostertag@…)

  • Property mode set to 100644
File size: 7.1 KB
Line 
1/*  bsp_start()
2 *
3 *  This routine starts the application.  It includes application,
4 *  board, and monitor specific initialization and configuration.
5 *  The generic CPU dependent initialization has been performed
6 *  before this routine is invoked.
7 *
8 *  INPUT:  NONE
9 *
10 *  OUTPUT: NONE
11 *
12 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
13 *  On-Line Applications Research Corporation (OAR).
14 *  All rights assigned to U.S. Government, 1994.
15 *
16 *  This material may be reproduced by or for the U.S. Government pursuant
17 *  to the copyright license under the clause at DFARS 252.227-7013.  This
18 *  notice must appear in all copies of this file and its derivatives.
19 *
20 *  $Id$
21 */
22
23#include <bsp.h>
24#include <rtems/libio.h>
25 
26#include <libcsupport.h>
27 
28#include <string.h>
29#include <fcntl.h>
30 
31#ifdef STACK_CHECKER_ON
32#include <stackchk.h>
33#endif
34
35#ifndef lint
36static char _sccsid[] = "@(#)bspstart.c 09/11/96     1.15\n";
37#endif
38
39/*
40 *  The original table from the application and our copy of it with
41 *  some changes.
42 */
43
44extern rtems_configuration_table Configuration;
45
46rtems_configuration_table  BSP_Configuration;
47
48rtems_cpu_table Cpu_table;
49
50char *rtems_progname;
51
52/*      Initialize whatever libc we are using
53 *      called from postdriver hook
54 */
55
56#define HEAP_BLOCK_SIZE (16 * 1024)
57
58rtems_unsigned32        heap_size = 0;
59rtems_unsigned32        heap_start;
60
61void bsp_libc_init()
62{
63    heap_size = 2 * 1024 * 1024; /* allocate a maximum of 2 megabytes for the heap */
64
65    /* allocate all remaining memory to the heap */
66    do {
67       heap_size -= HEAP_BLOCK_SIZE;
68       heap_start = _sysalloc( heap_size );
69    } while ( !heap_start );
70
71    if (!heap_start)
72       rtems_fatal_error_occurred( heap_size );
73
74    if (heap_start & (CPU_ALIGNMENT-1))
75        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
76
77    /*
78     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
79     *  size which a multiple of will be requested on each sbrk()
80     *  call by malloc().  A value of 0 indicates that sbrk() should
81     *  not be called to extend the heap.
82     */
83
84    RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 0);
85
86    /*
87     *  Init the RTEMS libio facility to provide UNIX-like system
88     *  calls for use by newlib (ie: provide __open, __close, etc)
89     *  Uses malloc() to get area for the iops, so must be after malloc init
90     */
91
92    rtems_libio_init();
93
94    /*
95     * Set up for the libc handling.
96     */
97
98    if (BSP_Configuration.ticks_per_timeslice > 0)
99        libc_init(1);                /* reentrant if possible */
100    else
101        libc_init(0);                /* non-reentrant */
102
103}
104
105/*
106 *  Function:   bsp_pretasking_hook
107 *  Created:    95/03/10
108 *
109 *  Description:
110 *      BSP pretasking hook.  Called just before drivers are initialized.
111 *      Used to setup libc and install any BSP extensions.
112 *
113 *  NOTES:
114 *      Must not use libc (to do io) from here, since drivers are
115 *      not yet initialized.
116 *
117 */
118 
119void
120bsp_pretasking_hook(void)
121{
122    bsp_libc_init();
123
124#ifdef STACK_CHECKER_ON
125    /*
126     *  Initialize the stack bounds checker
127     *  We can either turn it on here or from the app.
128     */
129 
130    Stack_check_Initialize();
131#endif
132 
133#ifdef RTEMS_DEBUG
134    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
135#endif
136}
137 
138
139/*
140 * After drivers are setup, register some "filenames"
141 * and open stdin, stdout, stderr files
142 *
143 * Newlib will automatically associate the files with these
144 * (it hardcodes the numbers)
145 */
146 
147void
148bsp_postdriver_hook(void)
149{
150  int stdin_fd, stdout_fd, stderr_fd;
151  int error_code;
152 
153  error_code = 'S' << 24 | 'T' << 16;
154 
155  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
156    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
157 
158  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
159    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
160 
161  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
162    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
163 
164  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
165    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
166
167  printf("allocated %d heap size, %d work space size\n",
168     heap_size, BSP_Configuration.work_space_size);
169  printf(" work space start 0x%x\n",(unsigned int)BSP_Configuration.work_space_start);
170}
171
172
173int bsp_start(
174  int argc,
175  char **argv,
176  char **environp
177)
178{
179  if ((argc > 0) && argv && argv[0])
180    rtems_progname = argv[0];
181  else
182    rtems_progname = "RTEMS";
183
184  /* set the PIA0 register wait states */
185  *(volatile unsigned32 *)0x80000020 = 0x04080000;
186
187  /*
188   *  Allocate the memory for the RTEMS Work Space.  This can come from
189   *  a variety of places: hard coded address, malloc'ed from outside
190   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
191   *  typically done by stock BSPs) by subtracting the required amount
192   *  of work space from the last physical address on the CPU board.
193   */
194
195  /*
196   *  Copy the Configuration Table .. so we can change it
197   */
198
199  BSP_Configuration = Configuration;
200
201  /*
202   * Add 1 region for the RTEMS Malloc
203   */
204
205  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
206
207  /*
208   * Add 1 extension for newlib libc
209   */
210
211#ifdef RTEMS_NEWLIB
212    BSP_Configuration.maximum_extensions++;
213#endif
214
215  /*
216   * Add 1 extension for newlib libc
217   */
218
219#ifdef RTEMS_NEWLIB
220    BSP_Configuration.maximum_extensions++;
221#endif
222
223#ifdef STACK_CHECKER_ON
224    /*
225     * Add 1 extension for stack checker
226     */
227 
228    BSP_Configuration.maximum_extensions++;
229#endif
230
231  /*
232   * Tell libio how many fd's we want and allow it to tweak config
233   */
234
235  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
236
237  /*
238   *  Need to "allocate" the memory for the RTEMS Workspace and
239   *  tell the RTEMS configuration where it is.  This memory is
240   *  not malloc'ed.  It is just "pulled from the air".
241   */
242
243  BSP_Configuration.work_space_start = _sysalloc( BSP_Configuration.work_space_size + 512 );
244  if (!BSP_Configuration.work_space_start)
245    rtems_fatal_error_occurred( BSP_Configuration.work_space_size );
246   
247  BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1));
248
249  /*
250   *  initialize the CPU table for this BSP
251   */
252
253  /*
254   *  we do not use the pretasking_hook
255   */
256
257  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
258
259  Cpu_table.predriver_hook = NULL;
260
261  Cpu_table.postdriver_hook = bsp_postdriver_hook;
262
263  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
264
265  Cpu_table.do_zero_of_workspace = TRUE;
266
267  Cpu_table.interrupt_stack_size = 4096;
268
269  Cpu_table.extra_system_initialization_stack = 0;
270
271  /*
272   *  Don't forget the other CPU Table entries.
273   */
274
275  _settrap( 109,&a29k_enable_sup);
276  _settrap( 110,&a29k_disable_sup);
277  _settrap( 111,&a29k_enable_all_sup);
278  _settrap( 112,&a29k_disable_all_sup);
279  _settrap( 106,&a29k_context_switch_sup);
280  _settrap( 107,&a29k_context_restore_sup);
281  _settrap( 108,&a29k_context_save_sup);
282  _settrap( 105,&a29k_sigdfl_sup);
283
284  /*
285   *  Start RTEMS
286   */
287
288  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
289
290  bsp_cleanup();
291
292  return 0;
293}
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