source: rtems/c/src/lib/libbsp/no_cpu/no_bsp/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 
30/*
31 *  The original table from the application and our copy of it with
32 *  some changes.
33 */
34
35extern rtems_configuration_table Configuration;
36
37rtems_configuration_table  BSP_Configuration;
38
39rtems_cpu_table Cpu_table;
40
41char *rtems_progname;
42
43/*      Initialize whatever libc we are using
44 *      called from postdriver hook
45 */
46
47void bsp_libc_init()
48{
49    extern int end;
50    rtems_unsigned32        heap_start;
51
52    heap_start = (rtems_unsigned32) &end;
53    if (heap_start & (CPU_ALIGNMENT-1))
54        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
55
56    /*
57     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
58     *  size which a multiple of will be requested on each sbrk()
59     *  call by malloc().  A value of 0 indicates that sbrk() should
60     *  not be called to extend the heap.
61     */
62
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
114int bsp_start(
115  int argc,
116  char **argv,
117  char **environp
118)
119{
120  if ((argc > 0) && argv && argv[0])
121    rtems_progname = argv[0];
122  else
123    rtems_progname = "RTEMS";
124
125  /*
126   *  Allocate the memory for the RTEMS Work Space.  This can come from
127   *  a variety of places: hard coded address, malloc'ed from outside
128   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
129   *  typically done by stock BSPs) by subtracting the required amount
130   *  of work space from the last physical address on the CPU board.
131   */
132
133  /*
134   *  Copy the Configuration Table .. so we can change it
135   */
136
137  BSP_Configuration = Configuration;
138
139  /*
140   * Tell libio how many fd's we want and allow it to tweak config
141   */
142
143  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
144
145  /*
146   *  Need to "allocate" the memory for the RTEMS Workspace and
147   *  tell the RTEMS configuration where it is.  This memory is
148   *  not malloc'ed.  It is just "pulled from the air".
149   */
150
151  BSP_Configuration.work_space_start = (void *) 0;
152
153  /*
154   *  initialize the CPU table for this BSP
155   */
156
157  /*
158   *  we do not use the pretasking_hook
159   */
160
161  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
162
163  Cpu_table.predriver_hook = NULL;
164
165  Cpu_table.postdriver_hook = bsp_postdriver_hook;
166
167  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
168
169  Cpu_table.do_zero_of_workspace = TRUE;
170
171  Cpu_table.interrupt_stack_size = 4096;
172
173  Cpu_table.extra_mpci_receive_server_stack = 0;
174
175  /*
176   *  Don't forget the other CPU Table entries.
177   */
178
179  /*
180   *  Start RTEMS
181   */
182
183  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
184
185  bsp_cleanup();
186
187  return 0;
188}
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