blob: 2f947554853e97ee691be36c07ed27ce0eb31e68 (
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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* This set of routines starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before any of these are 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <string.h>
#include <fcntl.h>
#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <rtems/bspIo.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;
rtems_unsigned32 bsp_isr_level;
/*
* Tells us where to put the workspace in case remote debugger is present.
*/
#if 0
extern rtems_unsigned32 rdb_start;
#endif
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*
* bsp_pretasking_hook
*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*/
void bsp_pretasking_hook(void)
{
extern int end;
rtems_unsigned32 heap_start;
rtems_unsigned32 heap_size;
heap_start = (rtems_unsigned32) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = BSP_Configuration.work_space_start - (void *)&end;
heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */
bsp_libc_init((void *) heap_start, heap_size, 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 )
{
unsigned char *work_space_start;
#if 0
/*
* Set MSR to show vectors at 0 XXX
*/
_CPU_MSR_Value( msr_value );
msr_value &= ~PPC_MSR_EP;
_CPU_MSR_SET( msr_value );
#endif
/*
* Set up our hooks
* Make sure libc_init is done before drivers initialized so that
* they can use atexit()
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
/*
* Is this true?
*
* PSIM does zero out memory BUT only when IT begins execution. Thus
* if we want to have a clean slate in the workspace each time we
* begin execution of OUR application, then we must zero the workspace.
*
* It is true that it takes simulated time to clear the memory.
*/
Cpu_table.do_zero_of_workspace = FALSE;
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
/*
* The monitor likes the exception table to be at 0x0.
*/
Cpu_table.exceptions_in_RAM = TRUE;
BSP_Configuration.work_space_size += 1024;
work_space_start =
(unsigned char *)&RAM_END - BSP_Configuration.work_space_size;
if ( work_space_start <= (unsigned char *)&end ) {
printk( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
}
|
