source: rtems/c/src/lib/libbsp/m68k/dmv152/startup/bspstart.c @ 8bdcfc4

4.104.114.84.95
Last change on this file since 8bdcfc4 was 8bdcfc4, checked in by Joel Sherrill <joel.sherrill@…>, on Dec 19, 1995 at 8:26:32 PM

changes remerged after disk crash -- history lost

  • Property mode set to 100644
File size: 5.8 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 *  The original table from the application and our copy of it with
36 *  some changes.
37 */
38
39extern rtems_configuration_table  Configuration;
40rtems_configuration_table         BSP_Configuration;
41
42rtems_cpu_table Cpu_table;
43
44char *rtems_progname;
45
46/*      Initialize whatever libc we are using
47 *      called from postdriver hook
48 */
49
50void bsp_libc_init()
51{
52    extern int end;
53    rtems_unsigned32        heap_start;
54
55    heap_start = (rtems_unsigned32) &end;
56    if (heap_start & (CPU_ALIGNMENT-1))
57        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
58
59    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
60
61    /*
62     *  Init the RTEMS libio facility to provide UNIX-like system
63     *  calls for use by newlib (ie: provide __open, __close, etc)
64     *  Uses malloc() to get area for the iops, so must be after malloc init
65     */
66
67    rtems_libio_init();
68
69    /*
70     * Set up for the libc handling.
71     */
72
73    if (BSP_Configuration.ticks_per_timeslice > 0)
74        libc_init(1);                /* reentrant if possible */
75    else
76        libc_init(0);                /* non-reentrant */
77}
78
79/*
80 *  Function:   bsp_pretasking_hook
81 *  Created:    95/03/10
82 *
83 *  Description:
84 *      BSP pretasking hook.  Called just before drivers are initialized.
85 *      Used to setup libc and install any BSP extensions.
86 *
87 *  NOTES:
88 *      Must not use libc (to do io) from here, since drivers are
89 *      not yet initialized.
90 *
91 */
92 
93void
94bsp_pretasking_hook(void)
95{
96    bsp_libc_init();
97 
98#ifdef STACK_CHECKER_ON
99    /*
100     *  Initialize the stack bounds checker
101     *  We can either turn it on here or from the app.
102     */
103 
104    Stack_check_Initialize();
105#endif
106 
107#ifdef RTEMS_DEBUG
108    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
109#endif
110}
111 
112
113/*
114 * After drivers are setup, register some "filenames"
115 * and open stdin, stdout, stderr files
116 *
117 * Newlib will automatically associate the files with these
118 * (it hardcodes the numbers)
119 */
120 
121void
122bsp_postdriver_hook(void)
123{
124  int stdin_fd, stdout_fd, stderr_fd;
125  int error_code;
126 
127  error_code = 'S' << 24 | 'T' << 16;
128 
129  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
130    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
131 
132  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
133    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
134 
135  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
136    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
137 
138  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
139    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
140}
141
142int main(
143  int argc,
144  char **argv,
145  char **environp
146)
147{
148  m68k_isr_entry *monitors_vector_table;
149  int             index;
150  void           *vbr;
151
152  if ((argc > 0) && argv && argv[0])
153    rtems_progname = argv[0];
154  else
155    rtems_progname = "RTEMS";
156
157  monitors_vector_table = (m68k_isr_entry *)0;   /* Monitor Vectors are at 0 */
158  m68k_set_vbr( monitors_vector_table );
159
160  for ( index=2 ; index<=255 ; index++ )
161    M68Kvec[ index ] = monitors_vector_table[ 32 ];
162
163  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
164  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
165  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
166
167  /*
168   *  Uncommenting this seems to confuse/break the monitor on this board.
169   *  It probably assumes the vector table is at 0.
170   */
171
172  /* m68k_set_vbr( &M68Kvec ); */
173
174  /*
175   *  Adjust the VMEbus mode to round-robin.
176   */
177
178  /*
179   *  This is only apparent with the shared memory driver which has not
180   *  yet been supported on this target.
181   */
182
183  m68k_enable_caching();
184
185  /*
186   *  we only use a hook to get the C library initialized.
187   */
188
189  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
190
191  Cpu_table.predriver_hook = NULL;
192
193  Cpu_table.postdriver_hook = bsp_postdriver_hook;
194
195  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
196
197  Cpu_table.do_zero_of_workspace = TRUE;
198
199  m68k_get_vbr( vbr );
200  Cpu_table.interrupt_vector_table = vbr;
201
202  Cpu_table.interrupt_stack_size = 4096;
203
204  Cpu_table.extra_system_initialization_stack = 0;
205
206  /*
207   *  Copy the table
208   */
209
210  BSP_Configuration = Configuration;
211
212  BSP_Configuration.work_space_start = (void *)
213     (RAM_END - BSP_Configuration.work_space_size);
214
215  /*
216   * Add 1 region for Malloc in libc_low
217   */
218
219  BSP_Configuration.maximum_regions++;
220
221  /*
222   * Add 1 extension for newlib libc
223   */
224
225#ifdef RTEMS_NEWLIB
226    BSP_Configuration.maximum_extensions++;
227#endif
228
229  /*
230   * Add another extension if using the stack checker
231   */
232
233#ifdef STACK_CHECKER_ON
234    BSP_Configuration.maximum_extensions++;
235#endif
236
237  /*
238   * Tell libio how many fd's we want and allow it to tweak config
239   */
240
241  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
242
243  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
244  /* does not return */
245
246  /* Clock_exit is done as an atexit() function */
247
248  VME_interrupt_Disable( 0xff );
249
250  /* return like a "normal" subroutine to the monitor */
251  return 0;
252}
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