source: rtems/c/src/lib/libbsp/m68k/mvme136/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: 3.9 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#include <zilog/z8036.h>
28
29#include <string.h>
30
31/*
32 *  The original table from the application and our copy of it with
33 *  some changes.
34 */
35
36extern rtems_configuration_table  Configuration;
37rtems_configuration_table         BSP_Configuration;
38
39rtems_cpu_table Cpu_table;
40
41char *rtems_progname;
42
43/*      Initialize whatever libc we are using
44 *      called from postdriver hook
45 */
46
47void bsp_libc_init()
48{
49    extern int end;
50    rtems_unsigned32        heap_start;
51
52    heap_start = (rtems_unsigned32) &end;
53    if (heap_start & (CPU_ALIGNMENT-1))
54        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
55
56    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
57
58    /*
59     *  Init the RTEMS libio facility to provide UNIX-like system
60     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
61     *  Uses malloc() to get area for the iops, so must be after malloc init
62     */
63
64    rtems_libio_init();
65
66    /*
67     * Set up for the libc handling.
68     */
69
70    if (BSP_Configuration.ticks_per_timeslice > 0)
71        libc_init(1);                /* reentrant if possible */
72    else
73        libc_init(0);                /* non-reentrant */
74}
75
76/*
77 *  Function:   bsp_pretasking_hook
78 *  Created:    95/03/10
79 *
80 *  Description:
81 *      BSP pretasking hook.  Called just before drivers are initialized.
82 *      Used to setup libc and install any BSP extensions.
83 *
84 *  NOTES:
85 *      Must not use libc (to do io) from here, since drivers are
86 *      not yet initialized.
87 *
88 */
89 
90void
91bsp_pretasking_hook(void)
92{
93    bsp_libc_init();
94 
95#ifdef RTEMS_DEBUG
96    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
97#endif
98}
99 
100/*
101 *  Use the shared bsp_postdriver_hook() implementation
102 */
103 
104void bsp_postdriver_hook(void);
105
106void bsp_start( void )
107{
108  m68k_isr_entry *monitors_vector_table;
109  int             index;
110
111  monitors_vector_table = (m68k_isr_entry *)0;   /* 135Bug Vectors are at 0 */
112  m68k_set_vbr( monitors_vector_table );
113
114  for ( index=2 ; index<=255 ; index++ )
115    M68Kvec[ index ] = monitors_vector_table[ 32 ];
116
117  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
118  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
119  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
120  M68Kvec[ 47 ] = monitors_vector_table[ 47 ];   /* system call vector */
121
122  m68k_set_vbr( &M68Kvec );
123
124  (*(rtems_unsigned8 *)0xfffb0067) = 0x7f; /* make VME access round-robin */
125
126  m68k_enable_caching();
127
128  /*
129   *  we only use a hook to get the C library initialized.
130   */
131
132  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
133
134  Cpu_table.predriver_hook = NULL;
135
136  Cpu_table.postdriver_hook = bsp_postdriver_hook;
137
138  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
139
140  Cpu_table.do_zero_of_workspace = TRUE;
141
142  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
143
144  Cpu_table.interrupt_stack_size = 4096;
145
146  Cpu_table.extra_mpci_receive_server_stack = 0;
147
148  /*
149   *  Copy the table
150   */
151
152  BSP_Configuration = Configuration;
153
154  BSP_Configuration.work_space_start = (void *)
155     (RAM_END - BSP_Configuration.work_space_size);
156
157  /*
158   * Tell libio how many fd's we want and allow it to tweak config
159   */
160
161  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
162}
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