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,
31 #ifdef CONFIG_STATUS_LED
32 #include <status_led.h>
35 DECLARE_GLOBAL_DATA_PTR;
38 * All attempts to come up with a "common" initialization sequence
39 * that works for all boards and architectures failed: some of the
40 * requirements are just _too_ different. To get rid of the resulting
41 * mess of board dependend #ifdef'ed code we now make the whole
42 * initialization sequence configurable to the user.
44 * The requirements for any new initalization function is simple: it
45 * receives a pointer to the "global data" structure as it's only
46 * argument, and returns an integer return code, where 0 means
47 * "continue" and != 0 means "fatal error, hang the system".
51 extern void malloc_bin_reloc (void);
52 typedef int (init_fnc_t) (void);
55 * Begin and End of memory area for malloc(), and current "brk"
57 static ulong mem_malloc_start = 0;
58 static ulong mem_malloc_end = 0;
59 static ulong mem_malloc_brk = 0;
62 * The Malloc area is immediately below the monitor copy in RAM
64 static void mem_malloc_init (void)
66 mem_malloc_start = CONFIG_SYS_MALLOC_BASE;
67 mem_malloc_end = mem_malloc_start + CONFIG_SYS_MALLOC_LEN;
68 mem_malloc_brk = mem_malloc_start;
69 memset ((void *) mem_malloc_start,
71 mem_malloc_end - mem_malloc_start);
74 void *sbrk (ptrdiff_t increment)
76 ulong old = mem_malloc_brk;
77 ulong new = old + increment;
79 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
83 return ((void *) old);
87 /************************************************************************
88 * Initialization sequence *
89 ***********************************************************************/
91 init_fnc_t *init_sequence[] = {
93 #if defined(CONFIG_BOARD_EARLY_INIT_F)
94 board_early_init_f, /* Call board-specific init code early.*/
103 NULL, /* Terminate this list */
107 /***********************************************************************/
108 void board_init (void)
111 init_fnc_t **init_fnc_ptr;
115 /* Pointer is writable since we allocated a register for it.
116 * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
118 gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
119 /* compiler optimization barrier needed for GCC >= 3.4 */
120 __asm__ __volatile__("": : :"memory");
122 memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
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;
129 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
130 bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
131 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
132 #if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
133 bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
134 bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
136 bd->bi_baudrate = CONFIG_BAUDRATE;
138 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
140 if ((*init_fnc_ptr) () != 0) {
146 bd->bi_flashsize = flash_init();
153 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
154 s = getenv ("ethaddr");
155 for (i = 0; i < 6; ++i) {
156 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
157 if (s) s = (*e) ? e + 1 : e;
170 #ifdef CONFIG_STATUS_LED
171 status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
182 /***********************************************************************/
186 #ifdef CONFIG_STATUS_LED
187 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
188 status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING);
190 puts("### ERROR ### Please reset board ###\n");
194 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
197 * x86 does not use a dedicated register to pass the pointer
200 argv[-1] = (char *)gd;
201 return entry (argc, argv);