source: rtems/c/src/lib/libbsp/m68k/mvme136/startup/bspstart.c @ 196094eb

4.104.114.84.95
Last change on this file since 196094eb 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: 2.9 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#include <zilog/z8036.h>
23
24#include <string.h>
25
26/*
27 *  The original table from the application and our copy of it with
28 *  some changes.
29 */
30
31extern rtems_configuration_table  Configuration;
32rtems_configuration_table         BSP_Configuration;
33
34rtems_cpu_table Cpu_table;
35
36char *rtems_progname;
37
38/*
39 *  Use the shared implementations of the following routines
40 */
41 
42void bsp_postdriver_hook(void);
43void bsp_libc_init( void *, unsigned32, int );
44
45/*
46 *  Function:   bsp_pretasking_hook
47 *  Created:    95/03/10
48 *
49 *  Description:
50 *      BSP pretasking hook.  Called just before drivers are initialized.
51 *      Used to setup libc and install any BSP extensions.
52 *
53 *  NOTES:
54 *      Must not use libc (to do io) from here, since drivers are
55 *      not yet initialized.
56 *
57 */
58 
59void bsp_pretasking_hook(void)
60{
61    extern int end;
62    rtems_unsigned32        heap_start;
63
64    heap_start = (rtems_unsigned32) &end;
65    if (heap_start & (CPU_ALIGNMENT-1))
66        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
67
68    bsp_libc_init((void *) heap_start, 64 * 1024, 0);
69
70 
71#ifdef RTEMS_DEBUG
72    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
73#endif
74}
75
76/*
77 *  bsp_start
78 *
79 *  This routine does the bulk of the system initialization.
80 */
81
82void bsp_start( void )
83{
84  m68k_isr_entry *monitors_vector_table;
85  int             index;
86
87  monitors_vector_table = (m68k_isr_entry *)0;   /* 135Bug Vectors are at 0 */
88  m68k_set_vbr( monitors_vector_table );
89
90  for ( index=2 ; index<=255 ; index++ )
91    M68Kvec[ index ] = monitors_vector_table[ 32 ];
92
93  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
94  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
95  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
96  M68Kvec[ 47 ] = monitors_vector_table[ 47 ];   /* system call vector */
97
98  m68k_set_vbr( &M68Kvec );
99
100  (*(rtems_unsigned8 *)0xfffb0067) = 0x7f; /* make VME access round-robin */
101
102  m68k_enable_caching();
103
104  /*
105   *  we only use a hook to get the C library initialized.
106   */
107
108  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
109  Cpu_table.postdriver_hook = bsp_postdriver_hook;
110  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
111  Cpu_table.interrupt_stack_size = 4096;
112
113  BSP_Configuration.work_space_start = (void *)
114     (RAM_END - BSP_Configuration.work_space_size);
115
116}
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