source: rtems/c/src/lib/libbsp/i386/force386/startup/bspstart.c @ 3652ad35

4.104.114.84.95
Last change on this file since 3652ad35 was 3652ad35, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 19, 1995 at 2:53:29 PM

Minor bug fixes to get all targets compilable and running. The
single biggest changes were the expansion of the workspace size
macro to include other types of objects and the increase in the
minimum stack size for most CPUs.

  • Property mode set to 100644
File size: 4.9 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 <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 __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 
126  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
127    rtems_fatal_error_occurred('STD0');
128 
129  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
130    rtems_fatal_error_occurred('STD1');
131 
132  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
133    rtems_fatal_error_occurred('STD2');
134 
135  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
136    rtems_fatal_error_occurred('STIO');
137}
138
139int main(
140  int argc,
141  char **argv,
142  char **environp
143)
144{
145 
146  if ((argc > 0) && argv && argv[0])
147    rtems_progname = argv[0];
148  else
149    rtems_progname = "RTEMS";
150 
151  /*
152   *  FORCE documentation incorrectly states that the bus request
153   *  level is initialized to 3.  It is actually initialized by
154   *  FORCEbug to 0.
155   */
156
157  outport_byte( 0x00, 0x3f );      /* resets VMEbus request level */
158
159  /*
160   *  we do not use the pretasking_hook.
161   */
162
163  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
164
165  Cpu_table.predriver_hook = NULL;
166
167  Cpu_table.postdriver_hook = bsp_postdriver_hook;
168
169  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
170
171  Cpu_table.do_zero_of_workspace = TRUE;
172
173  Cpu_table.interrupt_table_segment = get_ds();
174
175  Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table;
176
177  Cpu_table.interrupt_stack_size = 4096;
178
179  Cpu_table.extra_system_initialization_stack = 0;
180
181  /*
182   *  Copy the table
183   */
184
185  BSP_Configuration = Configuration;
186
187  BSP_Configuration.work_space_start = (void *)
188     RAM_END - BSP_Configuration.work_space_size;
189
190  /*
191   * Add 1 region for Malloc in libc_low
192   */
193
194  BSP_Configuration.maximum_regions++;
195
196  /*
197   * Add 1 extension for newlib libc
198   */
199
200#ifdef RTEMS_NEWLIB
201    BSP_Configuration.maximum_extensions++;
202#endif
203
204  /*
205   * Add another extension if using the stack checker
206   */
207
208#ifdef STACK_CHECKER_ON
209    BSP_Configuration.maximum_extensions++;
210#endif
211
212  /*
213   * Tell libio how many fd's we want and allow it to tweak config
214   */
215
216  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
217
218  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
219  /* does not return */
220  /* no cleanup necessary for Force CPU-386 */
221  return 0;
222}
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