source: rtems/c/src/lib/libbsp/m68k/gen68302/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: 4.1 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 
28#include <string.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
40char *rtems_progname;
41
42/*      Initialize whatever libc we are using
43 *      called from postdriver hook
44 */
45
46void bsp_libc_init()
47{
48    extern int end;
49    rtems_unsigned32        heap_start;
50
51    heap_start = (rtems_unsigned32) &end;
52    if (heap_start & (CPU_ALIGNMENT-1))
53        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
54
55    /*
56     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
57     *  size which a multiple of will be requested on each sbrk()
58     *  call by malloc().  A value of 0 indicates that sbrk() should
59     *  not be called to extend the heap.
60     */
61
62    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 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
113
114void bsp_start( void )
115{
116
117  /*
118   *  Allocate the memory for the RTEMS Work Space.  This can come from
119   *  a variety of places: hard coded address, malloc'ed from outside
120   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
121   *  typically done by stock BSPs) by subtracting the required amount
122   *  of work space from the last physical address on the CPU board.
123   */
124#if 0
125  Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/;
126#endif
127
128
129  /*
130   *  Copy the Configuration Table .. so we can change it
131   */
132
133  BSP_Configuration = Configuration;
134
135  /*
136   * Tell libio how many fd's we want and allow it to tweak config
137   */
138
139  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
140
141  /*
142   *  Need to "allocate" the memory for the RTEMS Workspace and
143   *  tell the RTEMS configuration where it is.  This memory is
144   *  not malloc'ed.  It is just "pulled from the air".
145   */
146
147  BSP_Configuration.work_space_start = (void *)
148      (RAM_END - BSP_Configuration.work_space_size);
149
150  /*
151   *  initialize the CPU table for this BSP
152   */
153
154  /*
155   *  we do not use the pretasking_hook
156   */
157
158  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
159
160  Cpu_table.predriver_hook = NULL;
161
162  Cpu_table.postdriver_hook = bsp_postdriver_hook;
163
164  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
165
166  Cpu_table.do_zero_of_workspace = TRUE;
167
168  Cpu_table.interrupt_stack_size = 4096;
169
170  Cpu_table.extra_mpci_receive_server_stack = 0;
171
172  /*
173   *  Don't forget the other CPU Table entries.
174   */
175
176}
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