source: rtems/c/src/lib/libbsp/m68k/idp/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: 5.7 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
35unsigned char *duart_base;
36extern struct duart_regs duart_info;
37
38#define DELAY 5000
39
40void led_putnum();
41
42/*
43 *  The original table from the application and our copy of it with
44 *  some changes.
45 */
46 
47extern rtems_configuration_table  Configuration;
48rtems_configuration_table         BSP_Configuration;
49
50rtems_cpu_table Cpu_table;
51 
52char *rtems_progname;
53
54/*      Initialize whatever libc we are using
55 *      called from postdriver hook
56 */
57 
58void bsp_libc_init()
59{
60    extern int end;
61    rtems_unsigned32        heap_start;
62 
63    heap_start = (rtems_unsigned32) &end;
64    if (heap_start & (CPU_ALIGNMENT-1))
65        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
66 
67        /* Create 64 KByte memory region for RTEMS executive */
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  m68k_isr_entry *monitors_vector_table;
154  int             index;
155
156  duart_base = (unsigned char *)DUART_ADDR;
157
158  /*
159   *  Set the VBR here to the monitor's default.
160   */
161
162  monitors_vector_table = (m68k_isr_entry *)0;
163   /* This is where you set vector base register = 0 */
164  m68k_set_vbr( monitors_vector_table );
165
166  /* The vector interrupt table for the 680x0 is in appendix B-2
167         of the M68000 Family Programmer's reference table */
168  for ( index=2 ; index<=255 ; index++ )
169    M68Kvec[ index ] = monitors_vector_table[ 32 ];
170
171
172  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
173  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
174  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
175
176  /*
177   *  Set the VBR here if you do not want to use the monitor's vector table.
178   */
179
180  m68k_set_vbr( &M68Kvec );
181
182  m68k_enable_caching();
183
184  /*
185   *  we only use a hook to get the C library initialized.
186   */
187 
188  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
189
190  Cpu_table.predriver_hook = NULL;
191
192  Cpu_table.postdriver_hook = bsp_postdriver_hook;
193
194  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
195
196  Cpu_table.do_zero_of_workspace = TRUE;
197 
198  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
199 
200  Cpu_table.interrupt_stack_size = 4096;
201
202  Cpu_table.extra_mpci_receive_server_stack = 0;
203
204  /*
205   *  Copy the table
206   */
207 
208  BSP_Configuration = Configuration;
209 
210  BSP_Configuration.work_space_start = (void *)
211     (RAM_END - BSP_Configuration.work_space_size);
212 
213  /*
214   * Add 1 region for the RTEMS Malloc
215   */
216 
217  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
218 
219  /*
220   * Add 1 extension for newlib libc
221   */
222 
223#ifdef RTEMS_NEWLIB
224    BSP_Configuration.maximum_extensions++;
225#endif
226 
227  /*
228   * Add another extension if using the stack checker
229   */
230 
231#ifdef STACK_CHECKER_ON
232    BSP_Configuration.maximum_extensions++;
233#endif
234 
235  /*
236   * Tell libio how many fd's we want and allow it to tweak config
237   */
238
239  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
240
241/*  led_putnum('e'); * for debugging purposes only */
242
243  /* Clock_exit is done as an atexit() function */
244}
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