source: rtems/c/src/lib/libbsp/m68k/gen68302/startup/bspstart.c @ 634e746

4.104.114.84.95
Last change on this file since 634e746 was 634e746, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 29, 1997 at 12:28:47 AM

All RTEMS system call implementation renamed to be rtems_*.

  • Property mode set to 100644
File size: 5.8 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, 1990, 1991, 1992, 1993, 1994.
13 *  On-Line Applications Research Corporation (OAR).
14 *  All rights assigned to U.S. Government, 1994.
15 *
16 *  This material may be reproduced by or for the U.S. Government pursuant
17 *  to the copyright license under the clause at DFARS 252.227-7013.  This
18 *  notice must appear in all copies of this file and its derivatives.
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#include <fcntl.h>
30 
31#ifdef STACK_CHECKER_ON
32#include <stackchk.h>
33#endif
34
35/*
36 *  The original table from the application and our copy of it with
37 *  some changes.
38 */
39
40extern rtems_configuration_table Configuration;
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 * After drivers are setup, register some "filenames"
123 * and open stdin, stdout, stderr files
124 *
125 * Newlib will automatically associate the files with these
126 * (it hardcodes the numbers)
127 */
128 
129void
130bsp_postdriver_hook(void)
131{
132  int stdin_fd, stdout_fd, stderr_fd;
133  int error_code;
134 
135  error_code = 'S' << 24 | 'T' << 16;
136 
137  if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
138    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
139 
140  if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
141    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
142 
143  if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
144    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
145 
146  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
147    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
148}
149
150int main(
151  int argc,
152  char **argv,
153  char **environp
154)
155{
156  if ((argc > 0) && argv && argv[0])
157    rtems_progname = argv[0];
158  else
159    rtems_progname = "RTEMS";
160
161  /*
162   *  Allocate the memory for the RTEMS Work Space.  This can come from
163   *  a variety of places: hard coded address, malloc'ed from outside
164   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
165   *  typically done by stock BSPs) by subtracting the required amount
166   *  of work space from the last physical address on the CPU board.
167   */
168#if 0
169  Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/;
170#endif
171
172
173  /*
174   *  Copy the Configuration Table .. so we can change it
175   */
176
177  BSP_Configuration = Configuration;
178
179  /*
180   * Add 1 region for the RTEMS Malloc
181   */
182
183  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
184
185  /*
186   * Add 1 extension for newlib libc
187   */
188
189#ifdef RTEMS_NEWLIB
190    BSP_Configuration.maximum_extensions++;
191#endif
192
193  /*
194   * Add another extension if using the stack checker
195   */
196
197#ifdef STACK_CHECKER_ON
198    BSP_Configuration.maximum_extensions++;
199#endif
200
201  /*
202   * Tell libio how many fd's we want and allow it to tweak config
203   */
204
205  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
206
207  /*
208   *  Need to "allocate" the memory for the RTEMS Workspace and
209   *  tell the RTEMS configuration where it is.  This memory is
210   *  not malloc'ed.  It is just "pulled from the air".
211   */
212
213  BSP_Configuration.work_space_start = (void *)
214      (RAM_END - BSP_Configuration.work_space_size);
215
216  /*
217   *  initialize the CPU table for this BSP
218   */
219
220  /*
221   *  we do not use the pretasking_hook
222   */
223
224  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
225
226  Cpu_table.predriver_hook = NULL;
227
228  Cpu_table.postdriver_hook = bsp_postdriver_hook;
229
230  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
231
232  Cpu_table.do_zero_of_workspace = TRUE;
233
234  Cpu_table.interrupt_stack_size = 4096;
235
236  Cpu_table.extra_mpci_receive_server_stack = 0;
237
238  /*
239   *  Don't forget the other CPU Table entries.
240   */
241
242  /*
243   *  Start RTEMS
244   */
245
246  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
247
248  bsp_cleanup();
249
250  return 0;
251}
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