source: rtems/c/src/lib/libbsp/i386/go32/startup/bspstart.c @ c244a9ee

4.104.114.84.9
Last change on this file since c244a9ee was c244a9ee, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 14, 1998 at 9:32:12 PM

Stack checker extension now accounted for in confdefs.h

  • Property mode set to 100644
File size: 4.4 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#ifdef STACK_CHECKER_ON
32#include <stackchk.h>
33#endif
34
35/*
36 *  The original table from the application and our copy of it with
37 *  some changes.
38 */
39
40extern rtems_configuration_table  Configuration;
41rtems_configuration_table  BSP_Configuration;
42
43rtems_cpu_table Cpu_table;
44
45char *rtems_progname;
46
47/*      Initialize whatever libc we are using
48 *      called from postdriver hook
49 */
50
51void bsp_libc_init()
52{
53    rtems_unsigned32        heap_start;
54
55#if 0
56    extern int end;
57    heap_start = (rtems_unsigned32) &end;
58#else
59    void * sbrk( int );
60    heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
61#endif
62    if (heap_start & (CPU_ALIGNMENT-1))
63        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
64
65    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
66
67    /*
68     *  Init the RTEMS libio facility to provide UNIX-like system
69     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
70     *  Uses malloc() to get area for the iops, so must be after malloc init
71     */
72
73    rtems_libio_init();
74
75    /*
76     * Set up for the libc handling.
77     */
78
79    if (BSP_Configuration.ticks_per_timeslice > 0)
80        libc_init(1);                /* reentrant if possible */
81    else
82        libc_init(0);                /* non-reentrant */
83}
84 
85/*
86 *  Function:   bsp_pretasking_hook
87 *  Created:    95/03/10
88 *
89 *  Description:
90 *      BSP pretasking hook.  Called just before drivers are initialized.
91 *      Used to setup libc and install any BSP extensions.
92 *
93 *  NOTES:
94 *      Must not use libc (to do io) from here, since drivers are
95 *      not yet initialized.
96 *
97 */
98 
99void
100bsp_pretasking_hook(void)
101{
102    bsp_libc_init();
103 
104#ifdef STACK_CHECKER_ON
105    /*
106     *  Initialize the stack bounds checker
107     *  We can either turn it on here or from the app.
108     */
109 
110    Stack_check_Initialize();
111#endif
112 
113#ifdef RTEMS_DEBUG
114    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
115#endif
116}
117 
118
119/*
120 *  Use the shared bsp_postdriver_hook() implementation
121 */
122 
123void bsp_postdriver_hook(void);
124
125/* This is the original command line passed from DOS */
126char ** Go32_Argv;
127
128int main(
129  int argc,
130  char **argv,
131  char **environp
132)
133{
134  extern void * sbrk( int );
135  extern volatile void _exit( int );
136
137  /* Set up arguments that we can access later */
138  Go32_Argv = argv;
139
140  if ((argc > 0) && argv && argv[0])
141    rtems_progname = argv[0];
142  else
143    rtems_progname = "RTEMS";
144
145  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
146  Cpu_table.predriver_hook = NULL;
147  Cpu_table.postdriver_hook = bsp_postdriver_hook;
148  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
149  Cpu_table.do_zero_of_workspace = TRUE;
150  Cpu_table.interrupt_table_segment = 0;/* get_ds(); */
151  Cpu_table.interrupt_table_offset = (void *)0;
152  Cpu_table.interrupt_stack_size = 4096;
153  Cpu_table.extra_mpci_receive_server_stack = 0;
154
155  /*
156   *  Copy the table
157   */
158  BSP_Configuration = Configuration;
159
160  BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
161  if ( BSP_Configuration.work_space_start == 0 )  {
162    /* Big trouble */
163    int write( int, void *, int );
164    char msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
165    write( 2, msg, sizeof msg - 1 );
166    _exit( 1 );
167  }
168
169  /*
170   * Tell libio how many fd's we want and allow it to tweak config
171   */
172
173  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
174
175  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
176  /* does not return */
177
178  /* We only return here if the executive has finished.  This happens   */
179  /* when the task has called exit().                                   */
180  /* At this point we call _exit() which resides in djgcc.              */
181   
182  for (;;)
183          _exit( 0 );
184
185  /* no cleanup necessary for GO32 */
186
187  return 0;
188}
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