source: rtems/c/src/lib/libbsp/i386/go32/startup/bspstart.c @ 9b64c2d5

4.104.114.84.9
Last change on this file since 9b64c2d5 was 9b64c2d5, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 15, 1998 at 12:10:03 AM

Per suggestion from Eric Norum, went from one initial extension set
to multiple. This lets the stack check extension be installed
at system initialization time and avoids the BSP having to
even know about its existence.

  • Property mode set to 100644
File size: 4.2 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) 1989-1998.
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 
31/*
32 *  The original table from the application and our copy of it with
33 *  some changes.
34 */
35
36extern rtems_configuration_table  Configuration;
37rtems_configuration_table  BSP_Configuration;
38
39rtems_cpu_table Cpu_table;
40
41char *rtems_progname;
42
43/*      Initialize whatever libc we are using
44 *      called from postdriver hook
45 */
46
47void bsp_libc_init()
48{
49    rtems_unsigned32        heap_start;
50
51#if 0
52    extern int end;
53    heap_start = (rtems_unsigned32) &end;
54#else
55    void * sbrk( int );
56    heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
57#endif
58    if (heap_start & (CPU_ALIGNMENT-1))
59        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
60
61    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
62
63    /*
64     *  Init the RTEMS libio facility to provide UNIX-like system
65     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
66     *  Uses malloc() to get area for the iops, so must be after malloc init
67     */
68
69    rtems_libio_init();
70
71    /*
72     * Set up for the libc handling.
73     */
74
75    if (BSP_Configuration.ticks_per_timeslice > 0)
76        libc_init(1);                /* reentrant if possible */
77    else
78        libc_init(0);                /* non-reentrant */
79}
80 
81/*
82 *  Function:   bsp_pretasking_hook
83 *  Created:    95/03/10
84 *
85 *  Description:
86 *      BSP pretasking hook.  Called just before drivers are initialized.
87 *      Used to setup libc and install any BSP extensions.
88 *
89 *  NOTES:
90 *      Must not use libc (to do io) from here, since drivers are
91 *      not yet initialized.
92 *
93 */
94 
95void
96bsp_pretasking_hook(void)
97{
98    bsp_libc_init();
99 
100#ifdef RTEMS_DEBUG
101    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
102#endif
103}
104 
105
106/*
107 *  Use the shared bsp_postdriver_hook() implementation
108 */
109 
110void bsp_postdriver_hook(void);
111
112/* This is the original command line passed from DOS */
113char ** Go32_Argv;
114
115int main(
116  int argc,
117  char **argv,
118  char **environp
119)
120{
121  extern void * sbrk( int );
122  extern volatile void _exit( int );
123
124  /* Set up arguments that we can access later */
125  Go32_Argv = argv;
126
127  if ((argc > 0) && argv && argv[0])
128    rtems_progname = argv[0];
129  else
130    rtems_progname = "RTEMS";
131
132  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
133  Cpu_table.predriver_hook = NULL;
134  Cpu_table.postdriver_hook = bsp_postdriver_hook;
135  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
136  Cpu_table.do_zero_of_workspace = TRUE;
137  Cpu_table.interrupt_table_segment = 0;/* get_ds(); */
138  Cpu_table.interrupt_table_offset = (void *)0;
139  Cpu_table.interrupt_stack_size = 4096;
140  Cpu_table.extra_mpci_receive_server_stack = 0;
141
142  /*
143   *  Copy the table
144   */
145  BSP_Configuration = Configuration;
146
147  BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
148  if ( BSP_Configuration.work_space_start == 0 )  {
149    /* Big trouble */
150    int write( int, void *, int );
151    char msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
152    write( 2, msg, sizeof msg - 1 );
153    _exit( 1 );
154  }
155
156  /*
157   * Tell libio how many fd's we want and allow it to tweak config
158   */
159
160  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
161
162  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
163  /* does not return */
164
165  /* We only return here if the executive has finished.  This happens   */
166  /* when the task has called exit().                                   */
167  /* At this point we call _exit() which resides in djgcc.              */
168   
169  for (;;)
170          _exit( 0 );
171
172  /* no cleanup necessary for GO32 */
173
174  return 0;
175}
Note: See TracBrowser for help on using the repository browser.