source: rtems/c/src/lib/libbsp/m68k/shared/m68kpretaskinghook.c @ c97f5fd

4.104.114.84.95
Last change on this file since c97f5fd was c97f5fd, checked in by Joel Sherrill <joel.sherrill@…>, on Feb 12, 2005 at 1:35:44 AM

2005-02-11 Joel Sherrill <joel@…>

  • m68kpretaskinghook.c: Correct type of symbols from linkcmds to compile with gcc 4.x.
  • Property mode set to 100644
File size: 1.8 KB
Line 
1/*
2 *  This routine is an implementation of the bsp_pretasking_hook
3 *  that can be used by all m68k BSPs following linkcmds conventions
4 *  regarding heap, stack, and workspace allocation.
5 *
6 *  COPYRIGHT (c) 1989-1999.
7 *  On-Line Applications Research Corporation (OAR).
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.rtems.com/license/LICENSE.
12 *
13 *  $Id$
14 */
15
16#include <bsp.h>
17#include <rtems/libio.h>
18#include <rtems/libcsupport.h>
19
20/*
21 *  Function:   bsp_pretasking_hook
22 *  Created:    95/03/10
23 *
24 *  Description:
25 *      BSP pretasking hook.  Called just before drivers are initialized.
26 *      Used to setup libc and install any BSP extensions.
27 *
28 *  NOTES:
29 *      Must not use libc (to do io) from here, since drivers are
30 *      not yet initialized.
31 *
32 */
33
34extern void bsp_libc_init( void *, unsigned long, int );
35extern rtems_configuration_table  BSP_Configuration;
36
37extern char         _RamBase[];
38extern char         _WorkspaceBase[];
39extern char         _HeapSize[];
40
41unsigned long  _M68k_Ramsize;
42
43void bsp_pretasking_hook(void)
44{
45    void         *heapStart;
46    unsigned long heapSize = (unsigned long)_HeapSize;
47    unsigned long ramSpace;
48
49    heapStart =  (void *)
50       ((unsigned long)_WorkspaceBase + BSP_Configuration.work_space_size);
51    ramSpace = (unsigned long)_RamBase + _M68k_Ramsize - (unsigned long)heapStart;
52
53    /*
54     * Can't use 'if(heapSize==0)' because the compiler "knows" that nothing
55     * can have an address of 0 and proceeds to optimize-away the test.
56     */
57    if (heapSize < 10)
58        heapSize = ramSpace;
59    else if (heapSize > ramSpace)
60        rtems_fatal_error_occurred (('H'<<24) | ('E'<<16) | ('A'<<8) | 'P');
61
62    bsp_libc_init(heapStart, heapSize, 0);
63
64#ifdef RTEMS_DEBUG
65    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
66#endif
67
68}
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