source: rtems/c/src/lib/libbsp/m68k/efi332/startup/bspstart.c @ 634e746

4.104.114.84.95
Last change on this file since 634e746 was 634e746, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 29, 1997 at 12:28:47 AM

All RTEMS system call implementation renamed to be rtems_*.

  • Property mode set to 100644
File size: 5.1 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#include <libcsupport.h>
26 
27#include <string.h>
28#include <fcntl.h>
29 
30#ifdef STACK_CHECKER_ON
31#include <stackchk.h>
32#endif
33
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 __rtems_open, __rtems_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 = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
130    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
131 
132  if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
133    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
134 
135  if ((stderr_fd = __rtems_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  void           *vbr;
149
150  /*
151   *  we only use a hook to get the C library initialized.
152   */
153
154  Cpu_table.pretasking_hook = bsp_pretasking_hook;
155
156  Cpu_table.predriver_hook = NULL;
157
158  Cpu_table.postdriver_hook = bsp_postdriver_hook;
159
160  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
161
162  Cpu_table.do_zero_of_workspace = TRUE;
163
164  m68k_get_vbr( vbr );
165  Cpu_table.interrupt_vector_table = vbr;
166
167  Cpu_table.interrupt_stack_size = 4096;
168
169  Cpu_table.extra_mpci_receive_server_stack = 0;
170
171  /*
172   *  Copy the table
173   */
174
175  BSP_Configuration = Configuration;
176
177  BSP_Configuration.work_space_start = (void *)
178     (RAM_END - BSP_Configuration.work_space_size);
179
180  if ((unsigned int)BSP_Configuration.work_space_start < 
181      (unsigned int)((stack_start + stack_size) & 0xffffffc0) ) {
182    /* rtems_fatal_error_occurred can not be used before initalization */
183    RAW_PUTS("\n\rRTEMS: Out of memory.\n\r");
184    RAW_PUTS("RTEMS:    Check RAM_END and the size of the work space.\n\r");
185    goto exit;
186  }
187
188  /*
189   * Add 1 region for Malloc in libc_low
190   */
191
192  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
193
194  /*
195   * Add 1 extension for newlib libc
196   */
197
198#ifdef RTEMS_NEWLIB
199    BSP_Configuration.maximum_extensions++;
200#endif
201
202  /*
203   * Add another extension if using the stack checker
204   */
205
206#ifdef STACK_CHECKER_ON
207    BSP_Configuration.maximum_extensions++;
208#endif
209
210  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
211  /* does not return */
212
213  /* Clock_exit is done as an atexit() function */
214
215exit:
216  /* configure peripherals for safe exit */
217  bsp_cleanup();
218
219  /* return like a "normal" subroutine to the monitor */
220  return 0;
221}
222
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