source: rtems/c/src/lib/libbsp/m68k/dmv152/startup/bspstart.c @ bd9c3d1

4.104.114.84.9
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: 3.3 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 
25/*
26 *  The original table from the application and our copy of it with
27 *  some changes.
28 */
29
30extern rtems_configuration_table  Configuration;
31rtems_configuration_table         BSP_Configuration;
32
33rtems_cpu_table Cpu_table;
34
35char *rtems_progname;
36
37/*
38 *  Use the shared implementations of the following routines
39 */
40 
41void bsp_postdriver_hook(void);
42void bsp_libc_init( void *, unsigned32, int );
43
44/*
45 *  Function:   bsp_pretasking_hook
46 *  Created:    95/03/10
47 *
48 *  Description:
49 *      BSP pretasking hook.  Called just before drivers are initialized.
50 *      Used to setup libc and install any BSP extensions.
51 *
52 *  NOTES:
53 *      Must not use libc (to do io) from here, since drivers are
54 *      not yet initialized.
55 *
56 */
57 
58void bsp_pretasking_hook(void)
59{
60    extern int end;
61    rtems_unsigned32        heap_start;
62
63    heap_start = (rtems_unsigned32) &end;
64    if (heap_start & (CPU_ALIGNMENT-1))
65        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
66
67    bsp_libc_init((void *) heap_start, 64 * 1024, 0);
68 
69#ifdef RTEMS_DEBUG
70    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
71#endif
72}
73 
74/*
75 *  bsp_start
76 *
77 *  This routine does the bulk of the system initialization.
78 */
79
80void bsp_start( void )
81{
82  m68k_isr_entry *monitors_vector_table;
83  int             index;
84  void           *vbr;
85
86  monitors_vector_table = (m68k_isr_entry *)0;   /* Monitor Vectors are at 0 */
87  m68k_set_vbr( monitors_vector_table );
88
89  for ( index=2 ; index<=255 ; index++ )
90    M68Kvec[ index ] = monitors_vector_table[ 32 ];
91
92  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
93  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
94  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
95
96  /*
97   *  Uncommenting this seems to confuse/break the monitor on this board.
98   *  It probably assumes the vector table is at 0.
99   */
100
101  /* m68k_set_vbr( &M68Kvec ); */
102
103  /*
104   *  Adjust the VMEbus mode to round-robin.
105   */
106
107  /*
108   *  This is only apparent with the shared memory driver which has not
109   *  yet been supported on this target.
110   */
111
112  m68k_enable_caching();
113
114  /*
115   *  we only use a hook to get the C library initialized.
116   */
117
118  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
119  Cpu_table.postdriver_hook = bsp_postdriver_hook;
120  Cpu_table.do_zero_of_workspace = TRUE;
121  Cpu_table.interrupt_stack_size = 4096;
122
123  m68k_get_vbr( vbr );
124  Cpu_table.interrupt_vector_table = vbr;
125
126  BSP_Configuration.work_space_start = (void *)
127     (RAM_END - BSP_Configuration.work_space_size);
128
129  /*
130   *  Account for the console's resources
131   */
132
133  console_reserve_resources( &BSP_Configuration );
134
135  /* Clock_exit is done as an atexit() function */
136}
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