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wdenk4a551702003-10-08 23:26:14 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * (C) Copyright 2000-2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * 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 <devices.h>
29#include <watchdog.h>
wdenka3ad8e22003-10-19 23:22:11 +000030#include <net.h>
wdenk4a551702003-10-08 23:26:14 +000031
32
33/*
34 * All attempts to come up with a "common" initialization sequence
35 * that works for all boards and architectures failed: some of the
36 * requirements are just _too_ different. To get rid of the resulting
37 * mess of board dependend #ifdef'ed code we now make the whole
38 * initialization sequence configurable to the user.
39 *
40 * The requirements for any new initalization function is simple: it
41 * receives a pointer to the "global data" structure as it's only
42 * argument, and returns an integer return code, where 0 means
43 * "continue" and != 0 means "fatal error, hang the system".
44 */
45
46
47extern void malloc_bin_reloc (void);
48typedef int (init_fnc_t) (void);
49extern unsigned _vectors[];
50
51/*
52 * Begin and End of memory area for malloc(), and current "brk"
53 */
54static ulong mem_malloc_start = 0;
55static ulong mem_malloc_end = 0;
56static ulong mem_malloc_brk = 0;
57
58/*
59 * The Malloc area is immediately below the monitor copy in RAM
60 */
61static void mem_malloc_init (void)
62{
63 mem_malloc_start = CFG_MALLOC_BASE;
64 mem_malloc_end = mem_malloc_start + CFG_MALLOC_LEN;
65 mem_malloc_brk = mem_malloc_start;
66 memset ((void *) mem_malloc_start,
67 0,
68 mem_malloc_end - mem_malloc_start);
69}
70
71void *sbrk (ptrdiff_t increment)
72{
73 ulong old = mem_malloc_brk;
74 ulong new = old + increment;
75
76 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
77 return (NULL);
78 }
79 mem_malloc_brk = new;
80 return ((void *) old);
81}
82
83
84/************************************************************************
85 * Initialization sequence *
86 ***********************************************************************/
87
88init_fnc_t *init_sequence[] = {
89
90#if defined(CONFIG_BOARD_PRE_INIT)
91 board_pre_init, /* Call board-specific init code early.*/
92#endif
93
94 env_init,
95 serial_init,
96 console_init_f,
97 display_options,
98 checkcpu,
99 checkboard,
100 NULL, /* Terminate this list */
101};
102
103
104/***********************************************************************/
105void board_init (void)
106{
107 DECLARE_GLOBAL_DATA_PTR;
108
109 bd_t *bd;
110 init_fnc_t **init_fnc_ptr;
wdenka3ad8e22003-10-19 23:22:11 +0000111 char *s, *e;
112 int i;
wdenk4a551702003-10-08 23:26:14 +0000113
114 /* Pointer is writable since we allocated a register for it.
115 * Nios treats CFG_GBL_DATA_OFFSET as an address.
116 */
117 gd = (gd_t *)CFG_GBL_DATA_OFFSET;
118 memset( gd, 0, CFG_GBL_DATA_SIZE );
119
120 /* Copy exception vectors to the correct location.
121 */
122 memcpy( (void *)CFG_VECT_BASE, _vectors, 256 );
123
124 gd->bd = (bd_t *)(gd+1); /* At end of global data */
125 gd->baudrate = CONFIG_BAUDRATE;
126 gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
127
128 bd = gd->bd;
129 bd->bi_memstart = CFG_SDRAM_BASE;
130 bd->bi_memsize = CFG_SDRAM_SIZE;
131 bd->bi_flashstart = CFG_FLASH_BASE;
132 bd->bi_sramstart= CFG_SRAM_BASE;
133 bd->bi_sramsize = CFG_SRAM_SIZE;
134 bd->bi_baudrate = CONFIG_BAUDRATE;
135
136 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
137 if ((*init_fnc_ptr) () != 0) {
138 hang ();
139 }
140 }
141
142 bd->bi_flashsize = flash_init();
143
144 mem_malloc_init();
145 malloc_bin_reloc();
146 env_relocate();
147
wdenka0f2fe52003-10-28 09:14:21 +0000148 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
149 s = getenv ("ethaddr");
150 for (i = 0; i < 6; ++i) {
151 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
152 if (s) s = (*e) ? e + 1 : e;
153 }
154
wdenk4a551702003-10-08 23:26:14 +0000155 devices_init();
156 jumptable_init();
157 console_init_r();
158 /*
159 */
160
161 interrupt_init ();
162 /* main_loop */
163 for (;;) {
164 WATCHDOG_RESET ();
165 main_loop ();
166 }
167}
168
169
170/***********************************************************************/
171
172void hang (void)
173{
174 puts("### ERROR ### Please reset board ###\n");
175 for (;;);
176}