source: rtems/c/src/lib/libbsp/m68k/efi68k/startup/bspstart.c @ 9b64c2d5

4.104.114.84.95
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: 3.7 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#include <libcsupport.h>
26
27#include <string.h>
28 
29/*
30 *  The original table from the application and our copy of it with
31 *  some changes.
32 */
33
34extern rtems_configuration_table  Configuration;
35rtems_configuration_table         BSP_Configuration;
36
37rtems_cpu_table Cpu_table;
38
39char *rtems_progname;
40 
41rtems_unsigned32 Timer_interrupts;
42
43extern void set_debug_traps(void);
44extern void breakpoint(void);
45
46/*      Initialize whatever libc we are using
47 *      called from postdriver hook
48 */
49
50void bsp_libc_init()
51{
52/*   extern int end; */
53  rtems_unsigned32        heap_start;
54 
55  heap_start = (rtems_unsigned32) BSP_Configuration.work_space_start +
56               (rtems_unsigned32) BSP_Configuration.work_space_size;
57  if (heap_start & (CPU_ALIGNMENT-1))
58    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
59 
60  if (heap_start > (rtems_unsigned32) RAM_END) {
61    /* rtems_fatal_error_occurred can not be used before initalization */
62    RAW_PUTS("\n\rRTEMS: Out of memory.\n\r");
63    RAW_PUTS("RTEMS:    Check RAM_END and the size of the work space.\n\r");
64  }
65
66  RTEMS_Malloc_Initialize((void *) heap_start, 
67                          (RAM_END - heap_start), 0);
68   
69  /*
70   *  Init the RTEMS libio facility to provide UNIX-like system
71   *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
72   *  Uses malloc() to get area for the iops, so must be after malloc init
73   */
74
75  rtems_libio_init();
76
77  /*
78   * Set up for the libc handling.
79   */
80 
81  if (BSP_Configuration.ticks_per_timeslice > 0)
82    libc_init(1);                /* reentrant if possible */
83  else
84    libc_init(0);                /* non-reentrant */
85}
86 
87/*
88 *  Function:   bsp_pretasking_hook
89 *  Created:    95/03/10
90 *
91 *  Description:
92 *      BSP pretasking hook.  Called just before drivers are initialized.
93 *      Used to setup libc and install any BSP extensions.
94 *
95 *  NOTES:
96 *      Must not use libc (to do io) from here, since drivers are
97 *      not yet initialized.
98 *
99 */
100 
101void
102bsp_pretasking_hook(void)
103{
104    bsp_libc_init();
105 
106#ifdef RTEMS_DEBUG
107    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
108#endif
109}
110 
111 
112/*
113 *  Use the shared bsp_postdriver_hook() implementation
114 */
115 
116void bsp_postdriver_hook(void);
117
118
119void bsp_start( void )
120{
121  void           *vbr;
122
123/*   set_debug_traps();    */
124/*   breakpoint(); */
125
126  /*
127   *  we only use a hook to get the C library initialized.
128   */
129
130  Cpu_table.pretasking_hook = bsp_pretasking_hook;
131 
132  Cpu_table.predriver_hook = NULL;
133 
134  Cpu_table.postdriver_hook = bsp_postdriver_hook;
135
136  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
137
138  Cpu_table.do_zero_of_workspace = TRUE;
139
140  m68k_get_vbr( vbr );
141  Cpu_table.interrupt_vector_table = vbr;
142
143  Cpu_table.interrupt_stack_size = 0;
144
145  Cpu_table.extra_mpci_receive_server_stack = 0;
146
147  /*
148   *  Copy the table
149   */
150
151  BSP_Configuration = Configuration;
152
153  BSP_Configuration.work_space_start = (void *)
154    (((unsigned int)_end + STACK_SIZE + 0x100) & 0xffffff00);
155
156  /*
157   * Tell libio how many fd's we want and allow it to tweak config
158   */
159
160  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
161
162  /* Clock_exit is done as an atexit() function */
163}
164
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