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>
34 #if defined(CONFIG_SYS_NIOS_EPCSBASE)
35 #include <nios2-epcs.h>
38 DECLARE_GLOBAL_DATA_PTR;
41 * All attempts to come up with a "common" initialization sequence
42 * that works for all boards and architectures failed: some of the
43 * requirements are just _too_ different. To get rid of the resulting
44 * mess of board dependend #ifdef'ed code we now make the whole
45 * initialization sequence configurable to the user.
47 * The requirements for any new initalization function is simple: it
48 * receives a pointer to the "global data" structure as it's only
49 * argument, and returns an integer return code, where 0 means
50 * "continue" and != 0 means "fatal error, hang the system".
54 extern void malloc_bin_reloc (void);
55 typedef int (init_fnc_t) (void);
58 * Begin and End of memory area for malloc(), and current "brk"
60 static ulong mem_malloc_start = 0;
61 static ulong mem_malloc_end = 0;
62 static ulong mem_malloc_brk = 0;
65 * The Malloc area is immediately below the monitor copy in RAM
67 static void mem_malloc_init (void)
69 mem_malloc_start = CONFIG_SYS_MALLOC_BASE;
70 mem_malloc_end = mem_malloc_start + CONFIG_SYS_MALLOC_LEN;
71 mem_malloc_brk = mem_malloc_start;
72 memset ((void *) mem_malloc_start,
74 mem_malloc_end - mem_malloc_start);
77 void *sbrk (ptrdiff_t increment)
79 ulong old = mem_malloc_brk;
80 ulong new = old + increment;
82 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
86 return ((void *) old);
90 /************************************************************************
91 * Initialization sequence *
92 ***********************************************************************/
94 init_fnc_t *init_sequence[] = {
96 #if defined(CONFIG_BOARD_EARLY_INIT_F)
97 board_early_init_f, /* Call board-specific init code early.*/
99 #if defined(CONFIG_SYS_NIOS_EPCSBASE)
109 NULL, /* Terminate this list */
113 /***********************************************************************/
114 void board_init (void)
117 init_fnc_t **init_fnc_ptr;
121 /* Pointer is writable since we allocated a register for it.
122 * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
124 gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
125 /* compiler optimization barrier needed for GCC >= 3.4 */
126 __asm__ __volatile__("": : :"memory");
128 memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
130 gd->bd = (bd_t *)(gd+1); /* At end of global data */
131 gd->baudrate = CONFIG_BAUDRATE;
132 gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
135 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
136 bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
137 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
138 #if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
139 bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
140 bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
142 bd->bi_baudrate = CONFIG_BAUDRATE;
144 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
146 if ((*init_fnc_ptr) () != 0) {
152 bd->bi_flashsize = flash_init();
159 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
169 #if defined(CONFIG_BOARD_LATE_INIT)
181 /***********************************************************************/
185 disable_interrupts ();
186 puts("### ERROR ### Please reset board ###\n");