source: rtems/c/src/lib/libbsp/m68k/idp/startup/bspstart.c @ bd9c3d1

4.104.114.84.95
Last change on this file since bd9c3d1 was bd9c3d1, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 15, 1998 at 8:50:31 PM

Numerous changes which in total greatly reduced the amount of source
code in each BSP's bspstart.c. These changes were:

+ confdefs.h now knows libio's semaphore requirements
+ shared/main.c now copies Configuration to BSP_Configuration
+ shared/main.c fills in the Cpu_table with default values

This removed the need for rtems_libio_config() and the constant
BSP_LIBIO_MAX_FDS in every BSP. Plus now the maximum number of open
files can now be set on the gcc command line.

  • Property mode set to 100644
File size: 3.4 KB
Line 
1/*
2 *  This routine starts the application.  It includes application,
3 *  board, and monitor specific initialization and configuration.
4 *  The generic CPU dependent initialization has been performed
5 *  before this routine is invoked.
6 *
7 *  COPYRIGHT (c) 1989-1998.
8 *  On-Line Applications Research Corporation (OAR).
9 *  Copyright assigned to U.S. Government, 1994.
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.OARcorp.com/rtems/license.html.
14 *
15 *  $Id$
16 */
17
18#include <bsp.h>
19#include <rtems/libio.h>
20 
21#include <libcsupport.h>
22 
23#include <string.h>
24 
25unsigned char *duart_base;
26extern struct duart_regs duart_info;
27
28#define DELAY 5000
29
30void led_putnum();
31
32/*
33 *  The original table from the application and our copy of it with
34 *  some changes.
35 */
36 
37extern rtems_configuration_table  Configuration;
38rtems_configuration_table         BSP_Configuration;
39
40rtems_cpu_table Cpu_table;
41 
42char *rtems_progname;
43
44/*
45 *  Use the shared implementations of the following routines
46 */
47 
48void bsp_postdriver_hook(void);
49void bsp_libc_init( void *, unsigned32, int );
50
51/*
52 *  Function:   bsp_pretasking_hook
53 *  Created:    95/03/10
54 *
55 *  Description:
56 *      BSP pretasking hook.  Called just before drivers are initialized.
57 *      Used to setup libc and install any BSP extensions.
58 *
59 *  NOTES:
60 *      Must not use libc (to do io) from here, since drivers are
61 *      not yet initialized.
62 *
63 */
64 
65void bsp_pretasking_hook(void)
66{
67    extern int end;
68    rtems_unsigned32        heap_start;
69 
70    heap_start = (rtems_unsigned32) &end;
71    if (heap_start & (CPU_ALIGNMENT-1))
72        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
73 
74        /* Create 64 KByte memory region for RTEMS executive */
75    bsp_libc_init((void *) heap_start, 64 * 1024, 0);
76 
77#ifdef RTEMS_DEBUG
78    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
79#endif
80}
81 
82/*
83 *  bsp_start
84 *
85 *  This routine does the bulk of the system initialization.
86 */
87
88void bsp_start( void )
89{
90  m68k_isr_entry *monitors_vector_table;
91  int             index;
92
93  duart_base = (unsigned char *)DUART_ADDR;
94
95  /*
96   *  Set the VBR here to the monitor's default.
97   */
98
99  monitors_vector_table = (m68k_isr_entry *)0;
100   /* This is where you set vector base register = 0 */
101  m68k_set_vbr( monitors_vector_table );
102
103  /* The vector interrupt table for the 680x0 is in appendix B-2
104         of the M68000 Family Programmer's reference table */
105  for ( index=2 ; index<=255 ; index++ )
106    M68Kvec[ index ] = monitors_vector_table[ 32 ];
107
108
109  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
110  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
111  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
112
113  /*
114   *  Set the VBR here if you do not want to use the monitor's vector table.
115   */
116
117  m68k_set_vbr( &M68Kvec );
118
119  m68k_enable_caching();
120
121  /*
122   *  we only use a hook to get the C library initialized.
123   */
124 
125  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
126  Cpu_table.postdriver_hook = bsp_postdriver_hook;
127  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
128  Cpu_table.interrupt_stack_size = 4096;
129
130  BSP_Configuration.work_space_start = (void *)
131     (RAM_END - BSP_Configuration.work_space_size);
132 
133/*  led_putnum('e'); * for debugging purposes only */
134
135  /* Clock_exit is done as an atexit() function */
136}
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