source: rtems/c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c @ c244a9ee

4.104.114.84.9
Last change on this file since c244a9ee was c244a9ee, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 14, 1998 at 9:32:12 PM

Stack checker extension now accounted for in confdefs.h

  • Property mode set to 100644
File size: 4.5 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#ifdef STACK_CHECKER_ON
31#include <stackchk.h>
32#endif
33
34/*
35 *  The original table from the application and our copy of it with
36 *  some changes.
37 */
38
39extern rtems_configuration_table Configuration;
40
41rtems_configuration_table  BSP_Configuration;
42
43rtems_cpu_table Cpu_table;
44
45char *rtems_progname;
46
47/*      Initialize whatever libc we are using
48 *      called from postdriver hook
49 */
50
51void bsp_libc_init()
52{
53    extern int end;
54    rtems_unsigned32        heap_start;
55
56    heap_start = (rtems_unsigned32) &end;
57    if (heap_start & (CPU_ALIGNMENT-1))
58        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
59
60    /*
61     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
62     *  size which a multiple of will be requested on each sbrk()
63     *  call by malloc().  A value of 0 indicates that sbrk() should
64     *  not be called to extend the heap.
65     */
66
67    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 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 STACK_CHECKER_ON
107    /*
108     *  Initialize the stack bounds checker
109     *  We can either turn it on here or from the app.
110     */
111 
112    Stack_check_Initialize();
113#endif
114 
115#ifdef RTEMS_DEBUG
116    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
117#endif
118}
119 
120
121/*
122 *  Use the shared bsp_postdriver_hook() implementation
123 */
124 
125void bsp_postdriver_hook(void);
126
127int bsp_start(
128  int argc,
129  char **argv,
130  char **environp
131)
132{
133  if ((argc > 0) && argv && argv[0])
134    rtems_progname = argv[0];
135  else
136    rtems_progname = "RTEMS";
137
138  /*
139   *  Allocate the memory for the RTEMS Work Space.  This can come from
140   *  a variety of places: hard coded address, malloc'ed from outside
141   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
142   *  typically done by stock BSPs) by subtracting the required amount
143   *  of work space from the last physical address on the CPU board.
144   */
145
146  /*
147   *  Copy the Configuration Table .. so we can change it
148   */
149
150  BSP_Configuration = Configuration;
151
152  /*
153   * Tell libio how many fd's we want and allow it to tweak config
154   */
155
156  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
157
158  /*
159   *  Need to "allocate" the memory for the RTEMS Workspace and
160   *  tell the RTEMS configuration where it is.  This memory is
161   *  not malloc'ed.  It is just "pulled from the air".
162   */
163
164  BSP_Configuration.work_space_start = (void *) 0;
165
166  /*
167   *  initialize the CPU table for this BSP
168   */
169
170  /*
171   *  we do not use the pretasking_hook
172   */
173
174  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
175
176  Cpu_table.predriver_hook = NULL;
177
178  Cpu_table.postdriver_hook = bsp_postdriver_hook;
179
180  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
181
182  Cpu_table.do_zero_of_workspace = TRUE;
183
184  Cpu_table.interrupt_stack_size = 4096;
185
186  Cpu_table.extra_mpci_receive_server_stack = 0;
187
188  /*
189   *  Don't forget the other CPU Table entries.
190   */
191
192  /*
193   *  Start RTEMS
194   */
195
196  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
197
198  bsp_cleanup();
199
200  return 0;
201}
Note: See TracBrowser for help on using the repository browser.