source: rtems/c/src/lib/libbsp/i386/go32/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: 4.9 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#include <z8036.h>
28 
29#include <string.h>
30#include <fcntl.h>
31 
32#ifdef STACK_CHECKER_ON
33#include <stackchk.h>
34#endif
35
36/*
37 *  The original table from the application and our copy of it with
38 *  some changes.
39 */
40
41extern rtems_configuration_table  Configuration;
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    rtems_unsigned32        heap_start;
55
56#if 0
57    extern int end;
58    heap_start = (rtems_unsigned32) &end;
59#else
60    void * sbrk( int );
61    heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
62#endif
63    if (heap_start & (CPU_ALIGNMENT-1))
64        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
65
66    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
67
68    /*
69     *  Init the RTEMS libio facility to provide UNIX-like system
70     *  calls for use by newlib (ie: provide __open, __close, etc)
71     *  Uses malloc() to get area for the iops, so must be after malloc init
72     */
73
74    rtems_libio_init();
75
76    /*
77     * Set up for the libc handling.
78     */
79
80    if (BSP_Configuration.ticks_per_timeslice > 0)
81        libc_init(1);                /* reentrant if possible */
82    else
83        libc_init(0);                /* non-reentrant */
84
85    /*
86     *  Initialize the stack bounds checker
87     */
88
89#ifdef STACK_CHECKER_ON
90    Stack_check_Initialize();
91#endif
92
93}
94 
95/*
96 * After drivers are setup, register some "filenames"
97 * and open stdin, stdout, stderr files
98 *
99 * Newlib will automatically associate the files with these
100 * (it hardcodes the numbers)
101 */
102 
103void
104bsp_postdriver_hook(void)
105{
106  int stdin_fd, stdout_fd, stderr_fd;
107 
108  if ((stdin_fd = __open("/dev/console", O_RDONLY, 0)) == -1)
109    rtems_fatal_error_occurred('STD0');
110 
111  if ((stdout_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
112    rtems_fatal_error_occurred('STD1');
113 
114  if ((stderr_fd = __open("/dev/console", O_WRONLY, 0)) == -1)
115    rtems_fatal_error_occurred('STD2');
116 
117  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
118    rtems_fatal_error_occurred('STIO');
119}
120
121/* This is the original command line passed from DOS */
122char ** Go32_Argv;
123
124int main(
125  int argc,
126  char **argv,
127  char **environp
128)
129{
130  extern void * sbrk( int );
131  extern volatile void _exit( int );
132
133  /* Set up arguments that we can access later */
134  Go32_Argv = argv;
135
136  if ((argc > 0) && argv && argv[0])
137    rtems_progname = argv[0];
138  else
139    rtems_progname = "RTEMS";
140
141  Cpu_table.pretasking_hook     = NULL;
142  Cpu_table.predriver_hook = bsp_libc_init;  /* RTEMS resources available */
143  Cpu_table.postdriver_hook = bsp_postdriver_hook;
144  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
145  Cpu_table.do_zero_of_workspace = TRUE;
146  Cpu_table.interrupt_table_segment = 0;/* get_ds(); */
147  Cpu_table.interrupt_table_offset = (void *)0;
148  Cpu_table.interrupt_stack_size = 4096;
149  Cpu_table.extra_system_initialization_stack = 0;
150
151  /*
152   *  Copy the table
153   */
154  BSP_Configuration = Configuration;
155
156  BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
157  if ( BSP_Configuration.work_space_start == 0 )  {
158    /* Big trouble */
159    int write( int, void *, int );
160    char msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
161    write( 2, msg, sizeof msg - 1 );
162    _exit( 1 );
163  }
164
165  /*
166   * Add 1 region for Malloc in libc_low
167   */
168
169  BSP_Configuration.maximum_regions++;
170
171  /*
172   * Add 1 extension for newlib libc
173   */
174
175#ifdef RTEMS_NEWLIB
176  BSP_Configuration.maximum_extensions++;
177#endif
178
179  /*
180   * Add another extension if using the stack checker
181   */
182
183#ifdef STACK_CHECKER_ON
184  BSP_Configuration.maximum_extensions++;
185#endif
186
187  /*
188   * Tell libio how many fd's we want and allow it to tweak config
189   */
190
191  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
192
193  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
194  /* does not return */
195
196  /* We only return here if the executive has finished.  This happens   */
197  /* when the task has called exit().                                   */
198  /* At this point we call _exit() which resides in djgcc.              */
199   
200  for (;;)
201          _exit( 0 );
202
203  /* no cleanup necessary for GO32 */
204
205  return 0;
206}
Note: See TracBrowser for help on using the repository browser.