blob: eb89a283cb98463efef3345f475ea21b9c7ed065 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* This routine starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before this routine is invoked.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <libcsupport.h>
#include <string.h>
/*
* The original table from the application and our copy of it with
* some changes.
*/
extern rtems_configuration_table Configuration;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
char *rtems_progname;
rtems_unsigned32 Timer_interrupts;
extern void set_debug_traps(void);
extern void breakpoint(void);
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*
* Function: bsp_pretasking_hook
* Created: 95/03/10
*
* Description:
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* NOTES:
* Must not use libc (to do io) from here, since drivers are
* not yet initialized.
*
*/
void bsp_pretasking_hook(void)
{
/* extern int end; */
rtems_unsigned32 heap_start;
heap_start = (rtems_unsigned32) BSP_Configuration.work_space_start +
(rtems_unsigned32) BSP_Configuration.work_space_size;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
if (heap_start > (rtems_unsigned32) RAM_END) {
/* rtems_fatal_error_occurred can not be used before initalization */
RAW_PUTS("\n\rRTEMS: Out of memory.\n\r");
RAW_PUTS("RTEMS: Check RAM_END and the size of the work space.\n\r");
}
bsp_libc_init((void *) heap_start, (RAM_END - heap_start), 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
void *vbr;
/* set_debug_traps(); */
/* breakpoint(); */
/*
* we only use a hook to get the C library initialized.
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook;
Cpu_table.postdriver_hook = bsp_postdriver_hook;
m68k_get_vbr( vbr );
Cpu_table.interrupt_vector_table = vbr;
BSP_Configuration.work_space_start = (void *)
(((unsigned int)_end + STACK_SIZE + 0x100) & 0xffffff00);
/* Clock_exit is done as an atexit() function */
}
|
