source: rtems/c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c @ 9700578

4.104.114.84.95
Last change on this file since 9700578 was 9700578, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 30, 1995 at 9:54:45 PM

SPARC port passes all tests

  • 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;
41
42rtems_configuration_table  BSP_Configuration;
43
44rtems_cpu_table Cpu_table;
45
46char *rtems_progname;
47
48/*      Initialize whatever libc we are using
49 *      called from postdriver hook
50 */
51
52void bsp_libc_init()
53{
54    extern int end;
55    rtems_unsigned32        heap_start;
56
57    heap_start = (rtems_unsigned32) &end;
58    if (heap_start & (CPU_ALIGNMENT-1))
59        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
60
61    /*
62     *  The last parameter to RTEMS_Malloc_Initialize is the "chunk"
63     *  size which a multiple of will be requested on each sbrk()
64     *  call by malloc().  A value of 0 indicates that sbrk() should
65     *  not be called to extend the heap.
66     */
67
68    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
69
70    /*
71     *  Init the RTEMS libio facility to provide UNIX-like system
72     *  calls for use by newlib (ie: provide __open, __close, etc)
73     *  Uses malloc() to get area for the iops, so must be after malloc init
74     */
75
76    rtems_libio_init();
77
78    /*
79     * Set up for the libc handling.
80     */
81
82    if (BSP_Configuration.ticks_per_timeslice > 0)
83        libc_init(1);                /* reentrant if possible */
84    else
85        libc_init(0);                /* non-reentrant */
86}
87
88/*
89 *  Function:   bsp_pretasking_hook
90 *  Created:    95/03/10
91 *
92 *  Description:
93 *      BSP pretasking hook.  Called just before drivers are initialized.
94 *      Used to setup libc and install any BSP extensions.
95 *
96 *  NOTES:
97 *      Must not use libc (to do io) from here, since drivers are
98 *      not yet initialized.
99 *
100 */
101 
102void
103bsp_pretasking_hook(void)
104{
105    bsp_libc_init();
106 
107#ifdef STACK_CHECKER_ON
108    /*
109     *  Initialize the stack bounds checker
110     *  We can either turn it on here or from the app.
111     */
112 
113    Stack_check_Initialize();
114#endif
115 
116#ifdef RTEMS_DEBUG
117    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
118#endif
119}
120 
121
122/*
123 * After drivers are setup, register some "filenames"
124 * and open stdin, stdout, stderr files
125 *
126 * Newlib will automatically associate the files with these
127 * (it hardcodes the numbers)
128 */
129 
130void
131bsp_postdriver_hook(void)
132{
133  int stdin_fd, stdout_fd, stderr_fd;
134  int error_code;
135 
136  error_code = 'S' << 24 | 'T' << 16;
137 
138  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
139    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
140 
141  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
142    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
143 
144  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
145    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
146 
147  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
148    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
149}
150
151int bsp_start(
152  int argc,
153  char **argv,
154  char **environp
155)
156{
157  if ((argc > 0) && argv && argv[0])
158    rtems_progname = argv[0];
159  else
160    rtems_progname = "RTEMS";
161
162  /*
163   *  Allocate the memory for the RTEMS Work Space.  This can come from
164   *  a variety of places: hard coded address, malloc'ed from outside
165   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
166   *  typically done by stock BSPs) by subtracting the required amount
167   *  of work space from the last physical address on the CPU board.
168   */
169
170  /*
171   *  Copy the Configuration Table .. so we can change it
172   */
173
174  BSP_Configuration = Configuration;
175
176  /*
177   * Add 1 region for the RTEMS Malloc
178   */
179
180  BSP_Configuration.maximum_regions++;
181
182  /*
183   * Add 1 extension for newlib libc
184   */
185
186#ifdef RTEMS_NEWLIB
187    BSP_Configuration.maximum_extensions++;
188#endif
189
190  /*
191   * Add 1 extension for newlib libc
192   */
193
194#ifdef RTEMS_NEWLIB
195    BSP_Configuration.maximum_extensions++;
196#endif
197
198#ifdef STACK_CHECKER_ON
199    /*
200     * Add 1 extension for stack checker
201     */
202 
203    BSP_Configuration.maximum_extensions++;
204#endif
205
206  /*
207   * Tell libio how many fd's we want and allow it to tweak config
208   */
209
210  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
211
212  /*
213   *  Need to "allocate" the memory for the RTEMS Workspace and
214   *  tell the RTEMS configuration where it is.  This memory is
215   *  not malloc'ed.  It is just "pulled from the air".
216   */
217
218  BSP_Configuration.work_space_start = (void *) 0;
219
220  /*
221   *  initialize the CPU table for this BSP
222   */
223
224  /*
225   *  we do not use the pretasking_hook
226   */
227
228  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
229
230  Cpu_table.predriver_hook = NULL;
231
232  Cpu_table.postdriver_hook = bsp_postdriver_hook;
233
234  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
235
236  Cpu_table.do_zero_of_workspace = TRUE;
237
238  Cpu_table.interrupt_stack_size = 4096;
239
240  Cpu_table.extra_system_initialization_stack = 0;
241
242  /*
243   *  Don't forget the other CPU Table entries.
244   */
245
246  /*
247   *  Start RTEMS
248   */
249
250  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
251
252  bsp_cleanup();
253
254  return 0;
255}
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