source: rtems/c/src/lib/libbsp/m68k/gen68302/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;
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 __open, __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     *  Initialize the stack bounds checker
88     */
89
90#ifdef STACK_CHECKER_ON
91    Stack_check_Initialize();
92#endif
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
121int main(
122  int argc,
123  char **argv,
124  char **environp
125)
126{
127  if ((argc > 0) && argv && argv[0])
128    rtems_progname = argv[0];
129  else
130    rtems_progname = "RTEMS";
131
132  /*
133   *  Allocate the memory for the RTEMS Work Space.  This can come from
134   *  a variety of places: hard coded address, malloc'ed from outside
135   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
136   *  typically done by stock BSPs) by subtracting the required amount
137   *  of work space from the last physical address on the CPU board.
138   */
139#if 0
140  Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/;
141#endif
142
143
144  /*
145   *  Copy the Configuration Table .. so we can change it
146   */
147
148  BSP_Configuration = Configuration;
149
150  /*
151   * Add 1 region for the RTEMS Malloc
152   */
153
154  BSP_Configuration.maximum_regions++;
155
156  /*
157   * Add 1 extension for newlib libc
158   */
159
160#ifdef RTEMS_NEWLIB
161    BSP_Configuration.maximum_extensions++;
162#endif
163
164  /*
165   * Add another extension if using the stack checker
166   */
167
168#ifdef STACK_CHECKER_ON
169    BSP_Configuration.maximum_extensions++;
170#endif
171
172  /*
173   * Tell libio how many fd's we want and allow it to tweak config
174   */
175
176  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
177
178  /*
179   *  Need to "allocate" the memory for the RTEMS Workspace and
180   *  tell the RTEMS configuration where it is.  This memory is
181   *  not malloc'ed.  It is just "pulled from the air".
182   */
183
184  BSP_Configuration.work_space_start = (void *)
185      (RAM_END - BSP_Configuration.work_space_size);
186
187  /*
188   *  initialize the CPU table for this BSP
189   */
190
191  /*
192   *  we do not use the pretasking_hook
193   */
194
195  Cpu_table.pretasking_hook = NULL;
196
197  Cpu_table.predriver_hook = bsp_libc_init;    /* RTEMS resources available */
198
199  Cpu_table.postdriver_hook = bsp_postdriver_hook;
200
201  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
202
203  Cpu_table.do_zero_of_workspace = TRUE;
204
205  Cpu_table.interrupt_stack_size = 4096;
206
207  Cpu_table.extra_system_initialization_stack = 0;
208
209  /*
210   *  Don't forget the other CPU Table entries.
211   */
212
213  /*
214   *  Start RTEMS
215   */
216
217  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
218
219  bsp_cleanup();
220
221  return 0;
222}
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