source: rtems/c/src/lib/libbsp/i386/go32/startup/bspstart.c @ 637df35

4.104.114.84.95
Last change on this file since 637df35 was 637df35, checked in by Joel Sherrill <joel.sherrill@…>, on Jul 12, 1995 at 7:47:25 PM

Ada95, gnat, go32

  • Property mode set to 100644
File size: 3.3 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 <rtems.h>
24#include <bsp.h>
25#include <cpu.h>
26#include <libcsupport.h>
27
28#include <stackchk.h>
29
30/*
31 *  The original table from the application and our copy of it with
32 *  some changes.
33 */
34
35extern rtems_configuration_table  Configuration;
36rtems_configuration_table  BSP_Configuration;
37
38rtems_cpu_table Cpu_table;
39
40/*      Initialize whatever libc we are using
41 *      called from postdriver hook
42 */
43
44void bsp_libc_init()
45{
46    rtems_unsigned32        heap_start;
47
48#if 0
49    extern int end;
50    heap_start = (rtems_unsigned32) &end;
51#else
52    void * sbrk( int );
53    heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
54#endif
55    if (heap_start & (CPU_ALIGNMENT-1))
56        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
57
58    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
59
60    /*
61     * Set up for the libc handling.
62     */
63
64    if (BSP_Configuration.ticks_per_timeslice > 0)
65        libc_init(1);                /* reentrant if possible */
66    else
67        libc_init(0);                /* non-reentrant */
68
69    /*
70     *  Initialize the stack bounds checker
71     */
72
73#ifdef STACK_CHECKER_ON
74    Stack_check_Initialize();
75#endif
76
77}
78
79void bsp_start()
80{
81    extern void * sbrk( int );
82
83    Cpu_table.pretasking_hook           = NULL;
84    Cpu_table.predriver_hook = bsp_libc_init;  /* RTEMS resources available */
85    Cpu_table.postdriver_hook = NULL;   /* Call our main() for constructors */
86    Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
87    Cpu_table.do_zero_of_workspace      = TRUE;
88    Cpu_table.interrupt_table_segment   = 0;/* get_ds(); */
89    Cpu_table.interrupt_table_offset    = (void *)0;
90    Cpu_table.interrupt_stack_size      = 4096;
91    Cpu_table.extra_system_initialization_stack = 0;
92
93    /*
94     *  Copy the table
95     */
96    BSP_Configuration = Configuration;
97
98    BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
99    if ( BSP_Configuration.work_space_start == 0 )  {
100        /* Big trouble */
101        int     write( int, void *, int );
102        void    _exit( int );
103        char    msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
104        write( 2, msg, sizeof msg - 1 );
105        _exit( 1 );
106    }
107
108    /*
109     * Add 1 region for Malloc in libc_low
110     */
111
112    BSP_Configuration.maximum_regions++;
113
114    /*
115     * Add 1 extension for newlib libc
116     */
117
118#ifdef RTEMS_NEWLIB
119    BSP_Configuration.maximum_extensions++;
120#endif
121
122    /*
123     * Add another extension if using the stack checker
124     */
125
126#ifdef STACK_CHECKER_ON
127    BSP_Configuration.maximum_extensions++;
128#endif
129
130    rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
131    /* does not return */
132
133    /* no cleanup necessary for GO32 */
134}
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