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wdenk507bbe32004-04-18 21:13:41 +00001/*
Michal Simekcfc67112007-03-11 13:48:24 +01002 * (C) Copyright 2007 Michal Simek
wdenk507bbe32004-04-18 21:13:41 +00003 * (C) Copyright 2004 Atmark Techno, Inc.
4 *
Michal Simekcfc67112007-03-11 13:48:24 +01005 * Michal SIMEK <monstr@monstr.eu>
wdenk507bbe32004-04-18 21:13:41 +00006 * Yasushi SHOJI <yashi@atmark-techno.com>
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Michal Simekcfc67112007-03-11 13:48:24 +010018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenk507bbe32004-04-18 21:13:41 +000019 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27#include <common.h>
28#include <command.h>
29#include <malloc.h>
30#include <version.h>
wdenk7abf0c52004-04-18 21:45:42 +000031#include <watchdog.h>
wdenk507bbe32004-04-18 21:13:41 +000032
Wolfgang Denkd87080b2006-03-31 18:32:53 +020033DECLARE_GLOBAL_DATA_PTR;
34
Michal Simekcfc67112007-03-11 13:48:24 +010035const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")";
36
37#ifdef CFG_GPIO_0
38extern int gpio_init (void);
39#endif
40#ifdef CFG_INTC_0
41extern int interrupts_init (void);
42#endif
43#if (CONFIG_COMMANDS & CFG_CMD_NET)
44extern int eth_init (bd_t * bis);
45extern int getenv_IPaddr (char *);
46#endif
wdenk507bbe32004-04-18 21:13:41 +000047
48/*
49 * Begin and End of memory area for malloc(), and current "brk"
50 */
51static ulong mem_malloc_start;
52static ulong mem_malloc_end;
53static ulong mem_malloc_brk;
54
Michal Simekcfc67112007-03-11 13:48:24 +010055/*
56 * The Malloc area is immediately below the monitor copy in DRAM
57 * aka CFG_MONITOR_BASE - Note there is no need for reloc_off
58 * as our monitory code is run from SDRAM
59 */
60static void mem_malloc_init (void)
61{
Michal Simek17980492007-03-26 01:39:07 +020062 mem_malloc_end = (CFG_MALLOC_BASE + CFG_MALLOC_LEN);
63 mem_malloc_start = CFG_MALLOC_BASE;
Michal Simekcfc67112007-03-11 13:48:24 +010064 mem_malloc_brk = mem_malloc_start;
65 memset ((void *)mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
66}
wdenk507bbe32004-04-18 21:13:41 +000067
68void *sbrk (ptrdiff_t increment)
69{
70 ulong old = mem_malloc_brk;
71 ulong new = old + increment;
72
73 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
74 return (NULL);
75 }
76 mem_malloc_brk = new;
Michal Simekcfc67112007-03-11 13:48:24 +010077 return ((void *)old);
wdenk507bbe32004-04-18 21:13:41 +000078}
79
80/*
81 * All attempts to come up with a "common" initialization sequence
82 * that works for all boards and architectures failed: some of the
83 * requirements are just _too_ different. To get rid of the resulting
84 * mess of board dependend #ifdef'ed code we now make the whole
85 * initialization sequence configurable to the user.
86 *
87 * The requirements for any new initalization function is simple: it
88 * receives a pointer to the "global data" structure as it's only
89 * argument, and returns an integer return code, where 0 means
90 * "continue" and != 0 means "fatal error, hang the system".
91 */
92typedef int (init_fnc_t) (void);
93
94init_fnc_t *init_sequence[] = {
Michal Simekcfc67112007-03-11 13:48:24 +010095 env_init,
96 serial_init,
97#ifdef CFG_GPIO_0
98 gpio_init,
99#endif
100#ifdef CFG_INTC_0
101 interrupts_init,
102#endif
wdenk507bbe32004-04-18 21:13:41 +0000103 NULL,
104};
105
Michal Simekcfc67112007-03-11 13:48:24 +0100106void board_init (void)
wdenk7abf0c52004-04-18 21:45:42 +0000107{
wdenk857cad32004-07-10 23:48:41 +0000108 bd_t *bd;
wdenk7abf0c52004-04-18 21:45:42 +0000109 init_fnc_t **init_fnc_ptr;
Michal Simekcfc67112007-03-11 13:48:24 +0100110 gd = (gd_t *) CFG_GBL_DATA_OFFSET;
111#if (CONFIG_COMMANDS & CFG_CMD_FLASH)
112 ulong flash_size = 0;
113#endif
114 asm ("nop"); /* FIXME gd is not initialize - wait */
115 memset ((void *)gd, 0, CFG_GBL_DATA_SIZE);
116 gd->bd = (bd_t *) (gd + 1); /* At end of global data */
wdenk857cad32004-07-10 23:48:41 +0000117 gd->baudrate = CONFIG_BAUDRATE;
wdenk857cad32004-07-10 23:48:41 +0000118 bd = gd->bd;
119 bd->bi_baudrate = CONFIG_BAUDRATE;
Michal Simekcfc67112007-03-11 13:48:24 +0100120 bd->bi_memstart = CFG_SDRAM_BASE;
121 bd->bi_memsize = CFG_SDRAM_SIZE;
122
123 /* Initialise malloc() area */
124 mem_malloc_init ();
wdenk857cad32004-07-10 23:48:41 +0000125
wdenk7abf0c52004-04-18 21:45:42 +0000126 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
127 WATCHDOG_RESET ();
128 if ((*init_fnc_ptr) () != 0) {
129 hang ();
130 }
131 }
132
Michal Simekcfc67112007-03-11 13:48:24 +0100133#if (CONFIG_COMMANDS & CFG_CMD_FLASH)
134 bd->bi_flashstart = CFG_FLASH_BASE;
135 if (0 < (flash_size = flash_init ())) {
136 bd->bi_flashsize = flash_size;
137 bd->bi_flashoffset = CFG_FLASH_BASE + flash_size;
138 } else {
139 puts ("Flash init FAILED");
140 bd->bi_flashstart = 0;
141 bd->bi_flashsize = 0;
142 bd->bi_flashoffset = 0;
143 }
144#endif
145
146#if (CONFIG_COMMANDS & CFG_CMD_NET)
147 char *s, *e;
148 int i;
149 /* board MAC address */
150 s = getenv ("ethaddr");
151 for (i = 0; i < 6; ++i) {
152 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
153 if (s)
154 s = (*e) ? e + 1 : e;
155 }
156 /* IP Address */
157 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
158 eth_init (bd);
159#endif
160
161 /* relocate environment function pointers etc. */
162 env_relocate ();
163
wdenk7abf0c52004-04-18 21:45:42 +0000164 /* main_loop */
165 for (;;) {
166 WATCHDOG_RESET ();
167 main_loop ();
168 }
169}
170
wdenk507bbe32004-04-18 21:13:41 +0000171void hang (void)
172{
173 puts ("### ERROR ### Please RESET the board ###\n");
Michal Simekcfc67112007-03-11 13:48:24 +0100174 for (;;) ;
wdenk507bbe32004-04-18 21:13:41 +0000175}