]>
git.ipfire.org Git - people/ms/u-boot.git/blob - lib_nios/board.c
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
= CFG_MALLOC_BASE
;
67 mem_malloc_end
= mem_malloc_start
+ CFG_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 CFG_GBL_DATA_OFFSET as an address.
118 gd
= (gd_t
*)CFG_GBL_DATA_OFFSET
;
119 /* compiler optimization barrier needed for GCC >= 3.4 */
120 __asm__
__volatile__("": : :"memory");
122 memset( gd
, 0, CFG_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
= CFG_SDRAM_BASE
;
130 bd
->bi_memsize
= CFG_SDRAM_SIZE
;
131 bd
->bi_flashstart
= CFG_FLASH_BASE
;
132 #if defined(CFG_SRAM_BASE) && defined(CFG_SRAM_SIZE)
133 bd
->bi_sramstart
= CFG_SRAM_BASE
;
134 bd
->bi_sramsize
= CFG_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
);