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
|
/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <devices.h>
#include <version.h>
#include <net.h>
#include <asm/initcalls.h>
#include <asm/sections.h>
#ifndef CONFIG_IDENT_STRING
#define CONFIG_IDENT_STRING ""
#endif
DECLARE_GLOBAL_DATA_PTR;
const char version_string[] =
U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
unsigned long monitor_flash_len;
/*
* Begin and end of memory area for malloc(), and current "brk"
*/
static unsigned long mem_malloc_start = 0;
static unsigned long mem_malloc_end = 0;
static unsigned long mem_malloc_brk = 0;
/* The malloc area is wherever the board wants it to be */
static void mem_malloc_init(void)
{
mem_malloc_start = CFG_MALLOC_START;
mem_malloc_end = CFG_MALLOC_END;
mem_malloc_brk = mem_malloc_start;
printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
mem_malloc_start, mem_malloc_end);
memset ((void *)mem_malloc_start, 0,
mem_malloc_end - mem_malloc_start);
}
void *sbrk(ptrdiff_t increment)
{
unsigned long old = mem_malloc_brk;
unsigned long new = old + increment;
if ((new < mem_malloc_start) || (new > mem_malloc_end))
return NULL;
mem_malloc_brk = new;
return ((void *)old);
}
static int init_baudrate(void)
{
char tmp[64];
int i;
i = getenv_r("baudrate", tmp, sizeof(tmp));
if (i > 0) {
gd->baudrate = simple_strtoul(tmp, NULL, 10);
} else {
gd->baudrate = CONFIG_BAUDRATE;
}
return 0;
}
static int display_banner (void)
{
printf ("\n\n%s\n\n", version_string);
printf ("U-Boot code: %p -> %p data: %p -> %p\n",
_text, _etext, _data, _end);
return 0;
}
void hang(void)
{
for (;;) ;
}
static int display_dram_config (void)
{
int i;
puts ("DRAM Configuration:\n");
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
print_size (gd->bd->bi_dram[i].size, "\n");
}
return 0;
}
static void display_flash_config (void)
{
puts ("Flash: ");
print_size(gd->bd->bi_flashsize, " ");
printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
}
void start_u_boot (void)
{
gd_t gd_data;
/* Initialize the global data pointer */
memset(&gd_data, 0, sizeof(gd_data));
gd = &gd_data;
monitor_flash_len = _edata - _text;
/* Perform initialization sequence */
cpu_init();
timer_init();
env_init();
init_baudrate();
serial_init();
console_init_f();
display_banner();
board_init_memories();
mem_malloc_init();
gd->bd = malloc(sizeof(bd_t));
memset(gd->bd, 0, sizeof(bd_t));
gd->bd->bi_baudrate = gd->baudrate;
gd->bd->bi_dram[0].start = CFG_SDRAM_BASE;
gd->bd->bi_dram[0].size = gd->sdram_size;
board_init_info();
flash_init();
if (gd->bd->bi_flashsize)
display_flash_config();
if (gd->bd->bi_dram[0].size)
display_dram_config();
gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
if (!gd->bd->bi_boot_params)
puts("WARNING: Cannot allocate space for boot parameters\n");
/* initialize environment */
env_relocate();
devices_init();
jumptable_init();
console_init_r();
for (;;) {
main_loop();
}
}
|
