source: rtems/c/src/lib/libbsp/m68k/efi332/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: 3.6 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#include <libcsupport.h>
26 
27#include <string.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
39char *rtems_progname;
40
41/*      Initialize whatever libc we are using
42 *      called from postdriver hook
43 */
44
45void bsp_libc_init()
46{
47/*   extern int end; */
48  rtems_unsigned32        heap_start;
49 
50  heap_start = (rtems_unsigned32) BSP_Configuration.work_space_start +
51               (rtems_unsigned32) BSP_Configuration.work_space_size;
52  if (heap_start & (CPU_ALIGNMENT-1))
53    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
54 
55  if (heap_start > (rtems_unsigned32) RAM_END) {
56    /* rtems_fatal_error_occurred can not be used before initalization */
57    RAW_PUTS("\n\rRTEMS: Out of memory.\n\r");
58    RAW_PUTS("RTEMS:    Check RAM_END and the size of the work space.\n\r");
59  }
60
61  RTEMS_Malloc_Initialize((void *) heap_start, 
62                          (RAM_END - heap_start), 0);
63   
64  /*
65   *  Init the RTEMS libio facility to provide UNIX-like system
66   *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
67   *  Uses malloc() to get area for the iops, so must be after malloc init
68   */
69
70  rtems_libio_init();
71
72  /*
73   * Set up for the libc handling.
74   */
75 
76  if (BSP_Configuration.ticks_per_timeslice > 0)
77    libc_init(1);                /* reentrant if possible */
78  else
79    libc_init(0);                /* non-reentrant */
80}
81
82/*
83 *  Function:   bsp_pretasking_hook
84 *  Created:    95/03/10
85 *
86 *  Description:
87 *      BSP pretasking hook.  Called just before drivers are initialized.
88 *      Used to setup libc and install any BSP extensions.
89 *
90 *  NOTES:
91 *      Must not use libc (to do io) from here, since drivers are
92 *      not yet initialized.
93 *
94 */
95 
96void
97bsp_pretasking_hook(void)
98{
99    bsp_libc_init();
100 
101#ifdef RTEMS_DEBUG
102    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
103#endif
104}
105 
106 
107/*
108 *  Use the shared bsp_postdriver_hook() implementation
109 */
110 
111void bsp_postdriver_hook(void);
112
113void bsp_start( void )
114{
115  void           *vbr;
116
117  /*
118   *  we only use a hook to get the C library initialized.
119   */
120
121  Cpu_table.pretasking_hook = bsp_pretasking_hook;
122
123  Cpu_table.predriver_hook = NULL;
124
125  Cpu_table.postdriver_hook = bsp_postdriver_hook;
126
127  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
128
129  Cpu_table.do_zero_of_workspace = TRUE;
130
131  m68k_get_vbr( vbr );
132  Cpu_table.interrupt_vector_table = vbr;
133
134  Cpu_table.interrupt_stack_size = 0;
135
136  Cpu_table.extra_mpci_receive_server_stack = 0;
137
138  /*
139   *  Copy the table
140   */
141
142  BSP_Configuration = Configuration;
143
144  BSP_Configuration.work_space_start = (void *)
145    (((unsigned int)_end + STACK_SIZE + 0x100) & 0xffffff00);
146
147  /*
148   * Tell libio how many fd's we want and allow it to tweak config
149   */
150
151  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
152
153  /* Clock_exit is done as an atexit() function */
154}
155
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