source: rtems/c/src/lib/libbsp/i386/i386ex/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: 3.8 KB
Line 
1/*
2 *  This routine starts the application.  It includes application,
3 *  board, and monitor specific initialization and configuration.
4 *  The generic CPU dependent initialization has been performed
5 *  before this routine is invoked.
6 *
7 *  COPYRIGHT (c) 1989-1998.
8 *  On-Line Applications Research Corporation (OAR).
9 *  Copyright assigned to U.S. Government, 1994.
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.OARcorp.com/rtems/license.html.
14 *
15 *  Ported to the i386ex and submitted by:
16 *
17 *    Erik Ivanenko
18 *    University of Toronto
19 *    erik.ivanenko@utoronto.ca
20 * 
21 *  $Id$
22 */
23
24#include <bsp.h>
25#include <rtems/libio.h>
26 
27#include <libcsupport.h>
28
29/*
30 *  The original table from the application and our copy of it with
31 *  some changes.
32 */
33
34extern rtems_configuration_table  Configuration;
35rtems_configuration_table  BSP_Configuration;
36
37rtems_cpu_table Cpu_table;
38
39/*
40 *  Tells us where to put the workspace in case remote debugger is present.
41 */
42
43extern rtems_unsigned32  rdb_start;
44
45/*
46 *  bsp_libc_init
47 *
48 *  Initialize whatever libc we are using called from bsp_postdriver_hook.
49 */
50
51 
52void bsp_libc_init()
53{
54    extern int heap_bottom;
55    rtems_unsigned32 heap_start;
56    rtems_unsigned32 heap_size;
57
58    heap_start = (rtems_unsigned32) &heap_bottom;
59    if (heap_start & (CPU_ALIGNMENT-1))
60      heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
61
62    heap_size = BSP_Configuration.work_space_start -(void *) heap_start ;
63    heap_size &= 0xfffffff0;  /* keep it as a multiple of 16 bytes */
64
65    heap_size &= 0xfffffff0;  /* keep it as a multiple of 16 bytes */
66    RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 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 RTEMS_DEBUG
106    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
107#endif
108}
109
110
111/*
112 *  Use the shared bsp_postdriver_hook() implementation
113 */
114 
115void bsp_postdriver_hook(void);
116
117void bsp_start( void )
118{
119  /*
120   *  we do not use the pretasking_hook.
121   */
122
123  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
124 
125  Cpu_table.predriver_hook = NULL;
126 
127  Cpu_table.postdriver_hook = bsp_postdriver_hook;
128 
129  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
130 
131  Cpu_table.do_zero_of_workspace = TRUE;
132 
133  Cpu_table.interrupt_table_segment = get_ds();
134 
135  Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table;
136 
137  Cpu_table.interrupt_stack_size = 4096;  /* STACK_MINIMUM_SIZE */
138 
139  Cpu_table.extra_mpci_receive_server_stack = 0;
140
141  /*
142   *  Copy the table
143   */
144
145  BSP_Configuration = Configuration;
146
147#if defined(RTEMS_POSIX_API)
148  BSP_Configuration.work_space_size *= 3;
149#endif
150
151  BSP_Configuration.work_space_start = (void *)
152     RAM_END - BSP_Configuration.work_space_size;
153
154  /*
155   *  Account for the console's resources
156   */
157
158  /*   console_reserve_resources( &BSP_Configuration ); */
159
160
161  /*
162   * Tell libio how many fd's we want and allow it to tweak config
163   */
164
165  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
166
167}
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