source: rtems/c/src/lib/libbsp/m68k/gen68302/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 
28#include <string.h>
29 
30#ifdef STACK_CHECKER_ON
31#include <stackchk.h>
32#endif
33
34/*
35 *  The original table from the application and our copy of it with
36 *  some changes.
37 */
38
39extern rtems_configuration_table Configuration;
40rtems_configuration_table  BSP_Configuration;
41
42rtems_cpu_table Cpu_table;
43
44char *rtems_progname;
45
46/*      Initialize whatever libc we are using
47 *      called from postdriver hook
48 */
49
50void bsp_libc_init()
51{
52    extern int end;
53    rtems_unsigned32        heap_start;
54
55    heap_start = (rtems_unsigned32) &end;
56    if (heap_start & (CPU_ALIGNMENT-1))
57        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
58
59    /*
60     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
61     *  size which a multiple of will be requested on each sbrk()
62     *  call by malloc().  A value of 0 indicates that sbrk() should
63     *  not be called to extend the heap.
64     */
65
66    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 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 STACK_CHECKER_ON
106    /*
107     *  Initialize the stack bounds checker
108     *  We can either turn it on here or from the app.
109     */
110 
111    Stack_check_Initialize();
112#endif
113 
114#ifdef RTEMS_DEBUG
115    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
116#endif
117}
118 
119
120/*
121 *  Use the shared bsp_postdriver_hook() implementation
122 */
123 
124void bsp_postdriver_hook(void);
125
126
127void bsp_start( void )
128{
129
130  /*
131   *  Allocate the memory for the RTEMS Work Space.  This can come from
132   *  a variety of places: hard coded address, malloc'ed from outside
133   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
134   *  typically done by stock BSPs) by subtracting the required amount
135   *  of work space from the last physical address on the CPU board.
136   */
137#if 0
138  Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/;
139#endif
140
141
142  /*
143   *  Copy the Configuration Table .. so we can change it
144   */
145
146  BSP_Configuration = Configuration;
147
148  /*
149   * Tell libio how many fd's we want and allow it to tweak config
150   */
151
152  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
153
154  /*
155   *  Need to "allocate" the memory for the RTEMS Workspace and
156   *  tell the RTEMS configuration where it is.  This memory is
157   *  not malloc'ed.  It is just "pulled from the air".
158   */
159
160  BSP_Configuration.work_space_start = (void *)
161      (RAM_END - BSP_Configuration.work_space_size);
162
163  /*
164   *  initialize the CPU table for this BSP
165   */
166
167  /*
168   *  we do not use the pretasking_hook
169   */
170
171  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
172
173  Cpu_table.predriver_hook = NULL;
174
175  Cpu_table.postdriver_hook = bsp_postdriver_hook;
176
177  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
178
179  Cpu_table.do_zero_of_workspace = TRUE;
180
181  Cpu_table.interrupt_stack_size = 4096;
182
183  Cpu_table.extra_mpci_receive_server_stack = 0;
184
185  /*
186   *  Don't forget the other CPU Table entries.
187   */
188
189}
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