source: rtems/c/src/lib/libbsp/a29k/portsw/startup/bspstart.c @ bd9c3d1

4.104.114.84.9
Last change on this file since bd9c3d1 was bd9c3d1, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 15, 1998 at 8:50:31 PM

Numerous changes which in total greatly reduced the amount of source
code in each BSP's bspstart.c. These changes were:

+ confdefs.h now knows libio's semaphore requirements
+ shared/main.c now copies Configuration to BSP_Configuration
+ shared/main.c fills in the Cpu_table with default values

This removed the need for rtems_libio_config() and the constant
BSP_LIBIO_MAX_FDS in every BSP. Plus now the maximum number of open
files can now be set on the gcc command line.

  • Property mode set to 100644
File size: 4.1 KB
Line 
1/*
2 *  This routine starts the application.  It includes application,
3 *  board, and monitor specific initialization and configuration.
4 *  The generic CPU dependent initialization has been performed
5 *  before this routine is invoked.
6 *
7 *  COPYRIGHT (c) 1989-1998.
8 *  On-Line Applications Research Corporation (OAR).
9 *  Copyright assigned to U.S. Government, 1994.
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.OARcorp.com/rtems/license.html.
14 *
15 *  $Id$
16 */
17
18#include <bsp.h>
19#include <rtems/libio.h>
20 
21#include <libcsupport.h>
22 
23#include <string.h>
24 
25#ifndef lint
26static char _sccsid[] = "@(#)bspstart.c 09/11/96     1.15\n";
27#endif
28
29/*
30 *  The original table from the application and our copy of it with
31 *  some changes.
32 */
33
34extern rtems_configuration_table Configuration;
35
36rtems_configuration_table  BSP_Configuration;
37
38rtems_cpu_table Cpu_table;
39
40char *rtems_progname;
41
42/*      Initialize whatever libc we are using
43 *      called from postdriver hook
44 */
45
46#define HEAP_BLOCK_SIZE (16 * 1024)
47
48rtems_unsigned32        heap_size = 0;
49rtems_unsigned32        heap_start;
50
51/*
52 *  Use the shared implementations of the following routines
53 */
54 
55void bsp_postdriver_hook(void);
56void bsp_libc_init( void *, unsigned32, int );
57
58/*
59 *  Function:   bsp_pretasking_hook
60 *  Created:    95/03/10
61 *
62 *  Description:
63 *      BSP pretasking hook.  Called just before drivers are initialized.
64 *      Used to setup libc and install any BSP extensions.
65 *
66 *  NOTES:
67 *      Must not use libc (to do io) from here, since drivers are
68 *      not yet initialized.
69 *
70 */
71 
72void bsp_pretasking_hook(void)
73{
74   /* allocate a maximum of 2 megabytes for the heap */
75    heap_size = 2 * 1024 * 1024;
76
77    /* allocate all remaining memory to the heap */
78    do {
79       heap_size -= HEAP_BLOCK_SIZE;
80       heap_start = _sysalloc( heap_size );
81    } while ( !heap_start );
82
83    if (!heap_start)
84       rtems_fatal_error_occurred( heap_size );
85
86    if (heap_start & (CPU_ALIGNMENT-1))
87        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
88
89
90    bsp_libc_init((void *) heap_start, heap_size, 0);
91
92
93#ifdef RTEMS_DEBUG
94    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
95#endif
96}
97 
98/*
99 *  bsp_start
100 *
101 *  This routine does the bulk of the system initialization.
102 */
103
104int bsp_start(
105  int argc,
106  char **argv,
107  char **environp
108)
109{
110  if ((argc > 0) && argv && argv[0])
111    rtems_progname = argv[0];
112  else
113    rtems_progname = "RTEMS";
114
115  /* set the PIA0 register wait states */
116  *(volatile unsigned32 *)0x80000020 = 0x04080000;
117
118  /*
119   *  Allocate the memory for the RTEMS Work Space.  This can come from
120   *  a variety of places: hard coded address, malloc'ed from outside
121   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
122   *  typically done by stock BSPs) by subtracting the required amount
123   *  of work space from the last physical address on the CPU board.
124   */
125
126  /*
127   *  Need to "allocate" the memory for the RTEMS Workspace and
128   *  tell the RTEMS configuration where it is.  This memory is
129   *  not malloc'ed.  It is just "pulled from the air".
130   */
131
132  BSP_Configuration.work_space_start = _sysalloc( BSP_Configuration.work_space_size + 512 );
133  if (!BSP_Configuration.work_space_start)
134    rtems_fatal_error_occurred( BSP_Configuration.work_space_size );
135   
136  BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1));
137
138  /*
139   *  initialize the CPU table for this BSP
140   */
141
142  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
143  Cpu_table.postdriver_hook = bsp_postdriver_hook;
144  Cpu_table.interrupt_stack_size = 4096;
145
146  _settrap( 109,&a29k_enable_sup);
147  _settrap( 110,&a29k_disable_sup);
148  _settrap( 111,&a29k_enable_all_sup);
149  _settrap( 112,&a29k_disable_all_sup);
150  _settrap( 106,&a29k_context_switch_sup);
151  _settrap( 107,&a29k_context_restore_sup);
152  _settrap( 108,&a29k_context_save_sup);
153  _settrap( 105,&a29k_sigdfl_sup);
154
155  /*
156   *  Start RTEMS
157   */
158
159  rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
160
161  bsp_cleanup();
162
163  return 0;
164}
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