2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * (C) Copyright 2000-2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
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.
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.
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,
28 #include <stdio_dev.h>
32 #ifdef CONFIG_STATUS_LED
33 #include <status_led.h>
36 DECLARE_GLOBAL_DATA_PTR;
39 * All attempts to come up with a "common" initialization sequence
40 * that works for all boards and architectures failed: some of the
41 * requirements are just _too_ different. To get rid of the resulting
42 * mess of board dependend #ifdef'ed code we now make the whole
43 * initialization sequence configurable to the user.
45 * The requirements for any new initalization function is simple: it
46 * receives a pointer to the "global data" structure as it's only
47 * argument, and returns an integer return code, where 0 means
48 * "continue" and != 0 means "fatal error, hang the system".
52 extern void malloc_bin_reloc (void);
53 typedef int (init_fnc_t) (void);
56 * The Malloc area is immediately below the monitor copy in RAM
58 static void mem_malloc_init (void)
60 mem_malloc_start = CONFIG_SYS_MALLOC_BASE;
61 mem_malloc_end = mem_malloc_start + CONFIG_SYS_MALLOC_LEN;
62 mem_malloc_brk = mem_malloc_start;
63 memset ((void *) mem_malloc_start,
65 mem_malloc_end - mem_malloc_start);
69 /************************************************************************
70 * Initialization sequence *
71 ***********************************************************************/
73 init_fnc_t *init_sequence[] = {
75 #if defined(CONFIG_BOARD_EARLY_INIT_F)
76 board_early_init_f, /* Call board-specific init code early.*/
85 NULL, /* Terminate this list */
89 /***********************************************************************/
90 void board_init (void)
93 init_fnc_t **init_fnc_ptr;
97 /* Pointer is writable since we allocated a register for it.
98 * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
100 gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
101 /* compiler optimization barrier needed for GCC >= 3.4 */
102 __asm__ __volatile__("": : :"memory");
104 memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
106 gd->bd = (bd_t *)(gd+1); /* At end of global data */
107 gd->baudrate = CONFIG_BAUDRATE;
108 gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
111 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
112 bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
113 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
114 #if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
115 bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
116 bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
118 bd->bi_baudrate = CONFIG_BAUDRATE;
120 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
122 if ((*init_fnc_ptr) () != 0) {
132 bd->bi_flashsize = flash_init();
137 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
149 #ifdef CONFIG_STATUS_LED
150 status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
161 /***********************************************************************/
165 #ifdef CONFIG_STATUS_LED
166 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
167 status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING);
169 puts("### ERROR ### Please reset board ###\n");
173 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
176 * x86 does not use a dedicated register to pass the pointer
179 argv[-1] = (char *)gd;
180 return entry (argc, argv);