source: rtems/c/src/lib/libbsp/m68k/idp/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: 4.3 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 
30unsigned char *duart_base;
31extern struct duart_regs duart_info;
32
33#define DELAY 5000
34
35void led_putnum();
36
37/*
38 *  The original table from the application and our copy of it with
39 *  some changes.
40 */
41 
42extern rtems_configuration_table  Configuration;
43rtems_configuration_table         BSP_Configuration;
44
45rtems_cpu_table Cpu_table;
46 
47char *rtems_progname;
48
49/*      Initialize whatever libc we are using
50 *      called from postdriver hook
51 */
52 
53void bsp_libc_init()
54{
55    extern int end;
56    rtems_unsigned32        heap_start;
57 
58    heap_start = (rtems_unsigned32) &end;
59    if (heap_start & (CPU_ALIGNMENT-1))
60        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
61 
62        /* Create 64 KByte memory region for RTEMS executive */
63    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
64
65    /*
66     *  Init the RTEMS libio facility to provide UNIX-like system
67     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
68     *  Uses malloc() to get area for the iops, so must be after malloc init
69     */
70
71    rtems_libio_init();
72 
73    /*
74     * Set up for the libc handling.
75     */
76 
77    if (BSP_Configuration.ticks_per_timeslice > 0)
78        libc_init(1);                /* reentrant if possible */
79        else
80        libc_init(0);                /* non-reentrant */
81}
82
83/*
84 *  Function:   bsp_pretasking_hook
85 *  Created:    95/03/10
86 *
87 *  Description:
88 *      BSP pretasking hook.  Called just before drivers are initialized.
89 *      Used to setup libc and install any BSP extensions.
90 *
91 *  NOTES:
92 *      Must not use libc (to do io) from here, since drivers are
93 *      not yet initialized.
94 *
95 */
96 
97void
98bsp_pretasking_hook(void)
99{
100    bsp_libc_init();
101 
102#ifdef RTEMS_DEBUG
103    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
104#endif
105}
106 
107
108/*
109 *  Use the shared bsp_postdriver_hook() implementation
110 */
111 
112void bsp_postdriver_hook(void);
113
114void bsp_start( void )
115{
116  m68k_isr_entry *monitors_vector_table;
117  int             index;
118
119  duart_base = (unsigned char *)DUART_ADDR;
120
121  /*
122   *  Set the VBR here to the monitor's default.
123   */
124
125  monitors_vector_table = (m68k_isr_entry *)0;
126   /* This is where you set vector base register = 0 */
127  m68k_set_vbr( monitors_vector_table );
128
129  /* The vector interrupt table for the 680x0 is in appendix B-2
130         of the M68000 Family Programmer's reference table */
131  for ( index=2 ; index<=255 ; index++ )
132    M68Kvec[ index ] = monitors_vector_table[ 32 ];
133
134
135  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
136  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
137  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
138
139  /*
140   *  Set the VBR here if you do not want to use the monitor's vector table.
141   */
142
143  m68k_set_vbr( &M68Kvec );
144
145  m68k_enable_caching();
146
147  /*
148   *  we only use a hook to get the C library initialized.
149   */
150 
151  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
152
153  Cpu_table.predriver_hook = NULL;
154
155  Cpu_table.postdriver_hook = bsp_postdriver_hook;
156
157  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
158
159  Cpu_table.do_zero_of_workspace = TRUE;
160 
161  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
162 
163  Cpu_table.interrupt_stack_size = 4096;
164
165  Cpu_table.extra_mpci_receive_server_stack = 0;
166
167  /*
168   *  Copy the table
169   */
170 
171  BSP_Configuration = Configuration;
172 
173  BSP_Configuration.work_space_start = (void *)
174     (RAM_END - BSP_Configuration.work_space_size);
175 
176  /*
177   * Tell libio how many fd's we want and allow it to tweak config
178   */
179
180  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
181
182/*  led_putnum('e'); * for debugging purposes only */
183
184  /* Clock_exit is done as an atexit() function */
185}
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