source: rtems/c/src/lib/libbsp/i386/go32/startup/bspstart.c @ 98e4ebf

4.104.114.84.95
Last change on this file since 98e4ebf was 98e4ebf, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 8, 1997 at 3:45:54 PM

Fixed typo in the pointer to the license terms.

  • Property mode set to 100644
File size: 5.5 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) 1989-1997.
13 *  On-Line Applications Research Corporation (OAR).
14 *  Copyright assigned to U.S. Government, 1994.
15 *
16 *  The license and distribution terms for this file may be
17 *  found in the file LICENSE in this distribution or at
18 *  http://www.OARcorp.com/rtems/license.html.
19 *
20 *  $Id$
21 */
22
23#include <bsp.h>
24#include <rtems/libio.h>
25 
26#include <libcsupport.h>
27#include <zilog/z8036.h>
28 
29#include <string.h>
30#include <fcntl.h>
31 
32#ifdef STACK_CHECKER_ON
33#include <stackchk.h>
34#endif
35
36/*
37 *  The original table from the application and our copy of it with
38 *  some changes.
39 */
40
41extern rtems_configuration_table  Configuration;
42rtems_configuration_table  BSP_Configuration;
43
44rtems_cpu_table Cpu_table;
45
46char *rtems_progname;
47
48/*      Initialize whatever libc we are using
49 *      called from postdriver hook
50 */
51
52void bsp_libc_init()
53{
54    rtems_unsigned32        heap_start;
55
56#if 0
57    extern int end;
58    heap_start = (rtems_unsigned32) &end;
59#else
60    void * sbrk( int );
61    heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
62#endif
63    if (heap_start & (CPU_ALIGNMENT-1))
64        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
65
66    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
67
68    /*
69     *  Init the RTEMS libio facility to provide UNIX-like system
70     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
71     *  Uses malloc() to get area for the iops, so must be after malloc init
72     */
73
74    rtems_libio_init();
75
76    /*
77     * Set up for the libc handling.
78     */
79
80    if (BSP_Configuration.ticks_per_timeslice > 0)
81        libc_init(1);                /* reentrant if possible */
82    else
83        libc_init(0);                /* non-reentrant */
84}
85 
86/*
87 *  Function:   bsp_pretasking_hook
88 *  Created:    95/03/10
89 *
90 *  Description:
91 *      BSP pretasking hook.  Called just before drivers are initialized.
92 *      Used to setup libc and install any BSP extensions.
93 *
94 *  NOTES:
95 *      Must not use libc (to do io) from here, since drivers are
96 *      not yet initialized.
97 *
98 */
99 
100void
101bsp_pretasking_hook(void)
102{
103    bsp_libc_init();
104 
105#ifdef STACK_CHECKER_ON
106    /*
107     *  Initialize the stack bounds checker
108     *  We can either turn it on here or from the app.
109     */
110 
111    Stack_check_Initialize();
112#endif
113 
114#ifdef RTEMS_DEBUG
115    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
116#endif
117}
118 
119
120/*
121 * After drivers are setup, register some "filenames"
122 * and open stdin, stdout, stderr files
123 *
124 * Newlib will automatically associate the files with these
125 * (it hardcodes the numbers)
126 */
127 
128void
129bsp_postdriver_hook(void)
130{
131  int stdin_fd, stdout_fd, stderr_fd;
132  int error_code;
133 
134  error_code = 'S' << 24 | 'T' << 16;
135 
136  if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
137    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
138 
139  if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
140    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
141 
142  if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
143    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
144 
145  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
146    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
147}
148
149/* This is the original command line passed from DOS */
150char ** Go32_Argv;
151
152int main(
153  int argc,
154  char **argv,
155  char **environp
156)
157{
158  extern void * sbrk( int );
159  extern volatile void _exit( int );
160
161  /* Set up arguments that we can access later */
162  Go32_Argv = argv;
163
164  if ((argc > 0) && argv && argv[0])
165    rtems_progname = argv[0];
166  else
167    rtems_progname = "RTEMS";
168
169  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
170  Cpu_table.predriver_hook = NULL;
171  Cpu_table.postdriver_hook = bsp_postdriver_hook;
172  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
173  Cpu_table.do_zero_of_workspace = TRUE;
174  Cpu_table.interrupt_table_segment = 0;/* get_ds(); */
175  Cpu_table.interrupt_table_offset = (void *)0;
176  Cpu_table.interrupt_stack_size = 4096;
177  Cpu_table.extra_mpci_receive_server_stack = 0;
178
179  /*
180   *  Copy the table
181   */
182  BSP_Configuration = Configuration;
183
184  BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
185  if ( BSP_Configuration.work_space_start == 0 )  {
186    /* Big trouble */
187    int write( int, void *, int );
188    char msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
189    write( 2, msg, sizeof msg - 1 );
190    _exit( 1 );
191  }
192
193  /*
194   * Add 1 region for Malloc in libc_low
195   */
196
197  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
198
199  /*
200   * Add 1 extension for newlib libc
201   */
202
203#ifdef RTEMS_NEWLIB
204  BSP_Configuration.maximum_extensions++;
205#endif
206
207  /*
208   * Add another extension if using the stack checker
209   */
210
211#ifdef STACK_CHECKER_ON
212  BSP_Configuration.maximum_extensions++;
213#endif
214
215  /*
216   * Tell libio how many fd's we want and allow it to tweak config
217   */
218
219  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
220
221  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
222  /* does not return */
223
224  /* We only return here if the executive has finished.  This happens   */
225  /* when the task has called exit().                                   */
226  /* At this point we call _exit() which resides in djgcc.              */
227   
228  for (;;)
229          _exit( 0 );
230
231  /* no cleanup necessary for GO32 */
232
233  return 0;
234}
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