source: rtems/c/src/lib/libbsp/m68k/ods68302/startup/bspstart.c @ 3ec7bfc

4.104.114.84.95
Last change on this file since 3ec7bfc 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: 5.5 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 <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;
44rtems_interrupt_level bsp_isr_level;
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 __rtems_open, __rtems_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 = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
139    rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
140 
141  if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
142    rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
143 
144  if ((stderr_fd = __rtems_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
151void bsp_start( void )
152{
153  /*
154   *  Allocate the memory for the RTEMS Work Space.  This can come from
155   *  a variety of places: hard coded address, malloc'ed from outside
156   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
157   *  typically done by stock BSPs) by subtracting the required amount
158   *  of work space from the last physical address on the CPU board.
159   */
160#if 0
161  Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/;
162#endif
163
164
165  /*
166   *  Copy the Configuration Table .. so we can change it
167   */
168
169  BSP_Configuration = Configuration;
170
171  /*
172   * Add 1 region for the RTEMS Malloc
173   */
174
175  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
176
177  /*
178   * Add 1 extension for newlib libc
179   */
180
181#ifdef RTEMS_NEWLIB
182    BSP_Configuration.maximum_extensions++;
183#endif
184
185  /*
186   * Add another extension if using the stack checker
187   */
188
189#ifdef STACK_CHECKER_ON
190    BSP_Configuration.maximum_extensions++;
191#endif
192
193  /*
194   * Tell libio how many fd's we want and allow it to tweak config
195   */
196
197  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
198
199  /*
200   *  Need to "allocate" the memory for the RTEMS Workspace and
201   *  tell the RTEMS configuration where it is.  This memory is
202   *  not malloc'ed.  It is just "pulled from the air".
203   */
204
205  BSP_Configuration.work_space_start = (void *)
206      (RAM_END - BSP_Configuration.work_space_size);
207
208  /*
209   *  initialize the CPU table for this BSP
210   */
211
212  /*
213   *  we do not use the pretasking_hook
214   */
215
216  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
217
218  Cpu_table.predriver_hook = NULL;
219
220  Cpu_table.postdriver_hook = bsp_postdriver_hook;
221
222  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
223
224  Cpu_table.do_zero_of_workspace = TRUE;
225
226  Cpu_table.interrupt_stack_size = 4096;
227
228  Cpu_table.extra_mpci_receive_server_stack = 0;
229
230  /*
231   *  Don't forget the other CPU Table entries.
232   */
233}
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