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
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup tqm8xx
*
* @brief Source for BSP startup code.
*/
/*
* Copyright (c) 2008 embedded brains GmbH. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <rtems.h>
#include <rtems/counter.h>
#include <libcpu/powerpc-utility.h>
#include <bsp.h>
#include <bsp/vectors.h>
#include <bsp/bootcard.h>
#include <bsp/irq-generic.h>
#ifdef BSP_HAS_TQMMON
/*
* FIXME: TQ Monitor structure
*/
#endif /* BSP_HAS_TQMMON */
/* Configuration parameters for console driver, ... */
uint32_t BSP_bus_frequency;
/* Configuration parameter for clock driver */
uint32_t bsp_time_base_frequency;
/* Legacy */
uint32_t bsp_clicks_per_usec; /* for PIT driver: OSCCLK */
static const char *bsp_tqm_get_cib_string( const char *cib_id)
{
char srch_pattern[10] = "";
char *fnd_str;
/*
* create search pattern
*/
strcat(srch_pattern,"-");
strncat(srch_pattern,
cib_id,
sizeof(srch_pattern)-1-strlen(srch_pattern));
strncat(srch_pattern,
" ",
sizeof(srch_pattern)-1-strlen(srch_pattern));
/*
* search for pattern in info block (CIB)
*/
fnd_str = strstr((const char *)TQM_CONF_INFO_BLOCK_ADDR,srch_pattern);
if (fnd_str == NULL) {
return NULL;
}
else {
/*
* found? then advance behind search pattern
*/
return fnd_str + strlen(srch_pattern);
}
}
static uint32_t str_to_u32(const char *s)
{
uint32_t v = 0;
while (true) {
unsigned char digit = (unsigned char)*s - '0';
if (digit > 9) {
break;
}
v = (v * 10) + digit;
++s;
}
return v;
}
static rtems_status_code bsp_tqm_get_cib_uint32( const char *cib_id,
uint32_t *result)
{
const char *item_ptr;
item_ptr = bsp_tqm_get_cib_string(cib_id);
if (item_ptr == NULL) {
return RTEMS_INVALID_ID;
}
/*
* convert string to uint32
*/
*result = str_to_u32(item_ptr);
return RTEMS_SUCCESSFUL;
}
uint32_t _CPU_Counter_frequency(void)
{
return bsp_time_base_frequency;
}
void bsp_start( void)
{
/*
* Get CPU identification dynamically. Note that the get_ppc_cpu_type()
* function stores the result in global variables so that it can be used
* later...
*/
get_ppc_cpu_type();
get_ppc_cpu_revision();
/* Basic CPU initialization */
cpu_init();
/*
* Enable instruction and data caches. Do not force writethrough mode.
*/
#if BSP_INSTRUCTION_CACHE_ENABLED
rtems_cache_enable_instruction();
#endif
#if BSP_DATA_CACHE_ENABLED
rtems_cache_enable_data();
#endif
/*
* This is evaluated during runtime, so it should be ok to set it
* before we initialize the drivers.
*/
/* Initialize some device driver parameters */
/*
* get the (internal) bus frequency
* NOTE: the external bus may be clocked at a lower speed
* but this does not concern the internal units like PIT,
* DEC, baudrate generator etc)
*/
if (RTEMS_SUCCESSFUL !=
bsp_tqm_get_cib_uint32("cu",
&BSP_bus_frequency)) {
rtems_panic("Cannot determine BUS frequency\n");
}
bsp_time_base_frequency = BSP_bus_frequency / 16;
bsp_clicks_per_usec = bsp_time_base_frequency / 1000000;
ppc_exc_initialize();
bsp_interrupt_initialize();
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
|
