source: rtems/c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c @ 3a4ae6c

4.104.114.84.95
Last change on this file since 3a4ae6c was 3a4ae6c, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 11, 1995 at 7:35:39 PM

The word "RTEMS" almost completely removed from the core.

Configuration Table Template file added and all tests
modified to use this. All gvar.h and conftbl.h files
removed from test directories.

Configuration parameter maximum_devices added.

Core semaphore and mutex handlers added and RTEMS API Semaphore
Manager updated to reflect this.

Initialization sequence changed to invoke API specific initialization
routines. Initialization tasks table now owned by RTEMS Tasks Manager.

Added user extension for post-switch.

Utilized user extensions to implement API specific functionality
like signal dispatching.

Added extensions to the System Initialization Thread so that an
API can register a function to be invoked while the system
is being initialized. These are largely equivalent to the
pre-driver and post-driver hooks.

Added the Modules file oar-go32_p5, modified oar-go32, and modified
the file make/custom/go32.cfg to look at an environment varable which
determines what CPU model is being used.

All BSPs updated to reflect named devices and clock driver's IOCTL
used by the Shared Memory Driver. Also merged clock isr into
main file and removed ckisr.c where possible.

Updated spsize to reflect new and moved variables.

Makefiles for the executive source and include files updated to show
break down of files into Core, RTEMS API, and Neither.

Header and inline files installed into subdirectory based on whether
logically in the Core or a part of the RTEMS API.

  • Property mode set to 100644
File size: 5.1 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     *  Initialize the stack bounds checker
89     */
90
91#ifdef STACK_CHECKER_ON
92    Stack_check_Initialize();
93#endif
94}
95
96/*
97 * After drivers are setup, register some "filenames"
98 * and open stdin, stdout, stderr files
99 *
100 * Newlib will automatically associate the files with these
101 * (it hardcodes the numbers)
102 */
103 
104void
105bsp_postdriver_hook(void)
106{
107  int stdin_fd, stdout_fd, stderr_fd;
108 
109  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
110    rtems_fatal_error_occurred('STD0');
111 
112  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
113    rtems_fatal_error_occurred('STD1');
114 
115  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
116    rtems_fatal_error_occurred('STD2');
117 
118  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
119    rtems_fatal_error_occurred('STIO');
120}
121
122int main(
123  int argc,
124  char **argv,
125  char **environp
126)
127{
128  if ((argc > 0) && argv && argv[0])
129    rtems_progname = argv[0];
130  else
131    rtems_progname = "RTEMS";
132
133  /*
134   *  Allocate the memory for the RTEMS Work Space.  This can come from
135   *  a variety of places: hard coded address, malloc'ed from outside
136   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
137   *  typically done by stock BSPs) by subtracting the required amount
138   *  of work space from the last physical address on the CPU board.
139   */
140
141  /*
142   *  Copy the Configuration Table .. so we can change it
143   */
144
145  BSP_Configuration = Configuration;
146
147  /*
148   * Add 1 region for the RTEMS Malloc
149   */
150
151  BSP_Configuration.maximum_regions++;
152
153  /*
154   * Add 1 extension for newlib libc
155   */
156
157#ifdef RTEMS_NEWLIB
158    BSP_Configuration.maximum_extensions++;
159#endif
160
161  /*
162   * Add 1 extension for newlib libc
163   */
164
165#ifdef RTEMS_NEWLIB
166    BSP_Configuration.maximum_extensions++;
167#endif
168
169#ifdef STACK_CHECKER_ON
170    /*
171     * Add 1 extension for stack checker
172     */
173 
174    BSP_Configuration.maximum_extensions++;
175#endif
176
177  /*
178   * Tell libio how many fd's we want and allow it to tweak config
179   */
180
181  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
182
183  /*
184   *  Need to "allocate" the memory for the RTEMS Workspace and
185   *  tell the RTEMS configuration where it is.  This memory is
186   *  not malloc'ed.  It is just "pulled from the air".
187   */
188
189  BSP_Configuration.work_space_start = (void *) 0;
190
191  /*
192   *  initialize the CPU table for this BSP
193   */
194
195  /*
196   *  we do not use the pretasking_hook
197   */
198
199  Cpu_table.pretasking_hook = NULL;
200
201  Cpu_table.predriver_hook = bsp_libc_init;    /* RTEMS resources available */
202
203  Cpu_table.postdriver_hook = bsp_postdriver_hook;
204
205  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
206
207  Cpu_table.do_zero_of_workspace = TRUE;
208
209  Cpu_table.interrupt_stack_size = 4096;
210
211  Cpu_table.extra_system_initialization_stack = 0;
212
213  /*
214   *  Don't forget the other CPU Table entries.
215   */
216
217  /*
218   *  Start RTEMS
219   */
220
221  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
222
223  bsp_cleanup();
224
225  return 0;
226}
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