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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <stdio_dev.h>
#include <version.h>
#include <net.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
#include <asm/sections.h>
#include <asm/arch/mmu.h>
#include <asm/arch/hardware.h>
#ifndef CONFIG_IDENT_STRING
#define CONFIG_IDENT_STRING ""
#endif
#ifdef CONFIG_GENERIC_ATMEL_MCI
#include <mmc.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
unsigned long monitor_flash_len;
/* Weak aliases for optional board functions */
static int __do_nothing(void)
{
return 0;
}
int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
int board_early_init_r(void) __attribute__((weak, alias("__do_nothing")));
static int init_baudrate(void)
{
gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
return 0;
}
static int display_banner (void)
{
printf ("\n\n%s\n\n", version_string);
printf ("U-Boot code: %08lx -> %08lx data: %08lx -> %08lx\n",
(unsigned long)_text, (unsigned long)_etext,
(unsigned long)_data, (unsigned long)(&__bss_end));
return 0;
}
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 board_init_f(ulong board_type)
{
gd_t gd_data;
gd_t *new_gd;
bd_t *bd;
unsigned long *new_sp;
unsigned long monitor_len;
unsigned long monitor_addr;
unsigned long addr;
long sdram_size;
/* Initialize the global data pointer */
memset(&gd_data, 0, sizeof(gd_data));
gd = &gd_data;
/* Perform initialization sequence */
board_early_init_f();
arch_cpu_init();
board_postclk_init();
env_init();
init_baudrate();
serial_init();
console_init_f();
display_banner();
sdram_size = initdram(board_type);
/* If we have no SDRAM, we can't go on */
if (sdram_size <= 0)
panic("No working SDRAM available\n");
/*
* Now that we have DRAM mapped and working, we can
* relocate the code and continue running from DRAM.
*
* Reserve memory at end of RAM for (top down in that order):
* - u-boot image
* - heap for malloc()
* - board info struct
* - global data struct
* - stack
*/
addr = CONFIG_SYS_SDRAM_BASE + sdram_size;
monitor_len = (char *)(&__bss_end) - _text;
/*
* Reserve memory for u-boot code, data and bss.
* Round down to next 4 kB limit.
*/
addr -= monitor_len;
addr &= ~(4096UL - 1);
monitor_addr = addr;
/* Reserve memory for malloc() */
addr -= CONFIG_SYS_MALLOC_LEN;
#ifdef CONFIG_LCD
#ifdef CONFIG_FB_ADDR
printf("LCD: Frame buffer allocated at preset 0x%08x\n",
CONFIG_FB_ADDR);
gd->fb_base = CONFIG_FB_ADDR;
#else
addr = lcd_setmem(addr);
printf("LCD: Frame buffer allocated at 0x%08lx\n", addr);
gd->fb_base = addr;
#endif /* CONFIG_FB_ADDR */
#endif /* CONFIG_LCD */
/* Allocate a Board Info struct on a word boundary */
addr -= sizeof(bd_t);
addr &= ~3UL;
gd->bd = bd = (bd_t *)addr;
/* Allocate a new global data copy on a 8-byte boundary. */
addr -= sizeof(gd_t);
addr &= ~7UL;
new_gd = (gd_t *)addr;
/* And finally, a new, bigger stack. */
new_sp = (unsigned long *)addr;
gd->arch.stack_end = addr;
*(--new_sp) = 0;
*(--new_sp) = 0;
/*
* Initialize the board information struct with the
* information we have.
*/
bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
bd->bi_dram[0].size = sdram_size;
memcpy(new_gd, gd, sizeof(gd_t));
relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
}
void board_init_r(gd_t *new_gd, ulong dest_addr)
{
#ifndef CONFIG_ENV_IS_NOWHERE
extern char * env_name_spec;
#endif
bd_t *bd;
gd = new_gd;
bd = gd->bd;
gd->flags |= GD_FLG_RELOC;
gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
/* Enable the MMU so that we can keep u-boot simple */
mmu_init_r(dest_addr);
board_early_init_r();
monitor_flash_len = _edata - _text;
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
/*
* We have to relocate the command table manually
*/
fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
ll_entry_count(cmd_tbl_t, cmd));
#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
/* there are some other pointer constants we must deal with */
#ifndef CONFIG_ENV_IS_NOWHERE
env_name_spec += gd->reloc_off;
#endif
timer_init();
/* The malloc area is right below the monitor image in RAM */
mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
CONFIG_SYS_MALLOC_LEN, CONFIG_SYS_MALLOC_LEN);
enable_interrupts();
bd->bi_flashstart = 0;
bd->bi_flashsize = 0;
bd->bi_flashoffset = 0;
#ifndef CONFIG_SYS_NO_FLASH
bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
bd->bi_flashsize = flash_init();
bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
if (bd->bi_flashsize)
display_flash_config();
#endif
if (bd->bi_dram[0].size)
display_dram_config();
gd->bd->bi_boot_params = malloc(CONFIG_SYS_BOOTPARAMS_LEN);
if (!gd->bd->bi_boot_params)
puts("WARNING: Cannot allocate space for boot parameters\n");
/* initialize environment */
env_relocate();
stdio_init();
jumptable_init();
console_init_r();
/* Initialize from environment */
load_addr = getenv_ulong("loadaddr", 16, load_addr);
#ifdef CONFIG_BITBANGMII
bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
puts("Net: ");
eth_initialize(gd->bd);
#endif
#ifdef CONFIG_GENERIC_ATMEL_MCI
mmc_initialize(gd->bd);
#endif
for (;;) {
main_loop();
}
}
|
