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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* bsp_start()
*
* 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.
*
* INPUT: NONE
*
* OUTPUT: NONE
*
* Author: Thomas Doerfler <td@imd.m.isar.de>
* IMD Ingenieurbuero fuer Microcomputertechnik
*
* COPYRIGHT (c) 1998 by IMD
*
* Changes from IMD are covered by the original distributions terms.
* This file has been derived from the papyrus BSP:
*
* Author: Andrew Bray <andy@i-cubed.co.uk>
*
* COPYRIGHT (c) 1995 by i-cubed ltd.
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies, and that the name of i-cubed limited not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* i-cubed limited makes no representations about the suitability
* of this software for any purpose.
*
* Modifications for spooling console driver and control of memory layout
* with linker command file by
* Thomas Doerfler <td@imd.m.isar.de>
* for these modifications:
* COPYRIGHT (c) 1997 by IMD, Puchheim, Germany.
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies. IMD makes no representations about the suitability
* of this software for any purpose.
*
* Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c:
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
*
* Modifications for PPC405GP by Dennis Ehlin
*
* $Id$
*/
#include <string.h>
#include <fcntl.h>
#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <ictrl.h>
void *bsp_ram_end = (void *)RAM_END; /* first addr behind avail. ram area */
/*
* Driver configuration parameters
*/
uint32_t bsp_serial_per_sec; /* Serial clocks per second */
boolean bsp_serial_external_clock;
boolean bsp_serial_xon_xoff;
boolean bsp_serial_cts_rts;
uint32_t bsp_serial_rate;
uint32_t bsp_timer_average_overhead; /* Average overhead of timer in ticks */
uint32_t bsp_timer_least_valid; /* Least valid number from timer */
boolean bsp_timer_internal_clock; /* TRUE, when timer runs with CPU clk */
/* Initialize whatever libc we are using
* called from postdriver hook
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, uint32_t, int );
/*
*
* bsp_predriver_hook
*
* Before drivers are setup.
*/
void bsp_predriver_hook(void)
{
rtems_status_code status;
/* init the PPC405 external interrupt controller handler... */
status = ictrl_init();
}
/*
* 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;
extern int _heap_end;
uint32_t heap_start;
uint32_t heap_size;
uint32_t heap_end;
heap_start = (uint32_t ) &_end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_end = (uint32_t ) &_heap_end;
if (heap_end & (CPU_ALIGNMENT-1))
heap_end = (heap_end + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = heap_end - heap_start;
bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */
#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 )
{
/*
* Allocate the memory for the RTEMS Work Space. This can come from
* a variety of places: hard coded address, malloc'ed from outside
* RTEMS world (e.g. simulator or primitive memory manager), or (as
* typically done by stock BSPs) by subtracting the required amount
* of work space from the last physical address on the CPU board.
*/
/*
* Need to "allocate" the memory for the RTEMS Workspace and
* tell the RTEMS configuration where it is. This memory is
* not malloc'ed. It is just "pulled from the air".
*/
/* FIME: plan usage of RAM better:
- make top of ram dynamic,
- take out some part for persistant log
- make rest of ram to heap...
-remove RAM_END from bsp.h, this cannot be valid...
or must be a function call
*/
Configuration.work_space_start = (void *)
((char *)(bsp_ram_end)) - rtems_configuration_get_work_space_size();
/*
* initialize the device driver parameters
*/
bsp_clicks_per_usec = 300;
bsp_serial_per_sec = 14625000;
bsp_serial_external_clock = 0;
bsp_timer_internal_clock = 1;
bsp_serial_xon_xoff = 0;
bsp_serial_cts_rts = 1;
bsp_serial_rate = 115200;
bsp_timer_average_overhead = 2;
bsp_timer_least_valid = 3;
}
|
