source: rtems/c/src/lib/libbsp/i386/i386ex/startup/bspstart.c @ e2a2ec60

4.104.114.84.95
Last change on this file since e2a2ec60 was e2a2ec60, checked in by Joel Sherrill <joel.sherrill@…>, on Mar 21, 1998 at 3:37:18 PM

Switch to using a shared main() for all of the embedded BSPs
based on the GNU tools. This usually involved correcting the
type of bsp_start(), bsp_cleanup(), adjusting the start code to
call the right start routine (the shared boot_card()), and then
removing code from bsp_start() which was performed in the new
boot_card()/main() path.

  • Property mode set to 100644
File size: 4.8 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) 1989-1998.
13 *  On-Line Applications Research Corporation (OAR).
14 *  Copyright assigned to U.S. Government, 1994.
15 *
16 *  The license and distribution terms for this file may be
17 *  found in the file LICENSE in this distribution or at
18 *  http://www.OARcorp.com/rtems/license.html.
19 *
20 *  $Id$
21 */
22
23#include <bsp.h>
24#include <rtems/libio.h>
25 
26#include <libcsupport.h>
27 
28#include <fcntl.h>
29
30#ifdef PRINTON
31extern char inbyte(void);
32extern void outbyte(char);
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    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
61 
62    /*
63     *  Init the RTEMS libio facility to provide UNIX-like system
64     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
65     *  Uses malloc() to get area for the iops, so must be after malloc init
66     */
67 
68    rtems_libio_init();
69 
70    /*
71     * Set up for the libc handling.
72     */
73 
74    if (BSP_Configuration.ticks_per_timeslice > 0)
75        libc_init(1);                /* reentrant if possible */
76    else
77        libc_init(0);                /* non-reentrant */
78}
79
80/*
81 *  Function:   bsp_pretasking_hook
82 *  Created:    95/03/10
83 *
84 *  Description:
85 *      BSP pretasking hook.  Called just before drivers are initialized.
86 *      Used to setup libc and install any BSP extensions.
87 *
88 *  NOTES:
89 *      Must not use libc (to do io) from here, since drivers are
90 *      not yet initialized.
91 *
92 */
93 
94void
95bsp_pretasking_hook(void)
96{
97    bsp_libc_init();
98 
99#ifdef STACK_CHECKER_ON
100    /*
101     *  Initialize the stack bounds checker
102     *  We can either turn it on here or from the app.
103     */
104 
105    Stack_check_Initialize();
106#endif
107 
108#ifdef RTEMS_DEBUG
109    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
110#endif
111}
112
113
114/*
115 * After drivers are setup, register some "filenames"
116 * and open stdin, stdout, stderr files
117 *
118 * Newlib will automatically associate the files with these
119 * (it hardcodes the numbers)
120 */
121 
122void
123bsp_postdriver_hook(void)
124{
125  int stdin_fd, stdout_fd, stderr_fd;
126  int error_code;
127 
128  error_code = 'S' << 24 | 'T' << 16;
129 
130  if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
131    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
132 
133  if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
134    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
135 
136  if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
137    rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
138 
139  if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
140    rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
141}
142
143
144void bsp_start( void )
145{
146
147#ifdef PRINTON   
148  outbyte('a');
149  outbyte('b');
150  outbyte('c');
151  outbyte ('S');
152#endif
153
154  /*
155   *  we do not use the pretasking_hook.
156   */
157
158  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
159 
160  Cpu_table.predriver_hook = NULL;
161 
162  Cpu_table.postdriver_hook = bsp_postdriver_hook;
163 
164  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
165 
166  Cpu_table.do_zero_of_workspace = TRUE;
167 
168  Cpu_table.interrupt_table_segment = get_ds();
169 
170  Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table;
171 
172  Cpu_table.interrupt_stack_size = 4096;
173 
174  Cpu_table.extra_mpci_receive_server_stack = 0;
175
176  /*
177   *  Copy the table
178   */
179
180  BSP_Configuration = Configuration;
181
182  BSP_Configuration.work_space_start = (void *)
183     RAM_END - BSP_Configuration.work_space_size;
184
185
186#ifdef SPRINTON
187  sprintf( x_buffer, "ram end : %u, work_space_size: %d\n", 
188           RAM_END ,  BSP_Configuration.work_space_size ); 
189  do {
190    outbyte ( x_buffer[i] );
191  } while ( x_buffer[i++] != '\n');
192#endif
193
194  /*
195   * Add 1 region for Malloc in libc_low
196   */
197
198  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
199
200  /*
201   * Add 1 extension for newlib libc
202   */
203
204#ifdef RTEMS_NEWLIB
205    BSP_Configuration.maximum_extensions++;
206#endif
207
208  /*
209   * Add another extension if using the stack checker
210   */
211
212#ifdef STACK_CHECKER_ON
213    BSP_Configuration.maximum_extensions++;
214#endif
215
216}
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