mirror of
https://github.com/AsahiLinux/u-boot
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192 lines
4.8 KiB
C
192 lines
4.8 KiB
C
/*
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <devices.h>
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#include <watchdog.h>
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#include <net.h>
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#ifdef CONFIG_STATUS_LED
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#include <status_led.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* All attempts to come up with a "common" initialization sequence
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* that works for all boards and architectures failed: some of the
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* requirements are just _too_ different. To get rid of the resulting
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* mess of board dependend #ifdef'ed code we now make the whole
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* initialization sequence configurable to the user.
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*
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* The requirements for any new initalization function is simple: it
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* receives a pointer to the "global data" structure as it's only
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* argument, and returns an integer return code, where 0 means
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* "continue" and != 0 means "fatal error, hang the system".
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*/
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extern void malloc_bin_reloc (void);
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typedef int (init_fnc_t) (void);
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/*
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* Begin and End of memory area for malloc(), and current "brk"
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*/
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static ulong mem_malloc_start = 0;
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static ulong mem_malloc_end = 0;
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static ulong mem_malloc_brk = 0;
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/*
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* The Malloc area is immediately below the monitor copy in RAM
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*/
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static void mem_malloc_init (void)
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{
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mem_malloc_start = CFG_MALLOC_BASE;
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mem_malloc_end = mem_malloc_start + CFG_MALLOC_LEN;
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mem_malloc_brk = mem_malloc_start;
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memset ((void *) mem_malloc_start,
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0,
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mem_malloc_end - mem_malloc_start);
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}
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void *sbrk (ptrdiff_t increment)
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{
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ulong old = mem_malloc_brk;
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ulong new = old + increment;
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if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
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return (NULL);
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}
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mem_malloc_brk = new;
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return ((void *) old);
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}
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/************************************************************************
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* Initialization sequence *
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***********************************************************************/
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init_fnc_t *init_sequence[] = {
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#if defined(CONFIG_BOARD_EARLY_INIT_F)
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board_early_init_f, /* Call board-specific init code early.*/
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#endif
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env_init,
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serial_init,
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console_init_f,
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display_options,
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checkcpu,
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checkboard,
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NULL, /* Terminate this list */
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};
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/***********************************************************************/
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void board_init (void)
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{
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bd_t *bd;
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init_fnc_t **init_fnc_ptr;
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char *s, *e;
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int i;
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/* Pointer is writable since we allocated a register for it.
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* Nios treats CFG_GBL_DATA_OFFSET as an address.
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*/
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gd = (gd_t *)CFG_GBL_DATA_OFFSET;
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/* compiler optimization barrier needed for GCC >= 3.4 */
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__asm__ __volatile__("": : :"memory");
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memset( gd, 0, CFG_GBL_DATA_SIZE );
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gd->bd = (bd_t *)(gd+1); /* At end of global data */
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gd->baudrate = CONFIG_BAUDRATE;
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gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
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bd = gd->bd;
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bd->bi_memstart = CFG_SDRAM_BASE;
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bd->bi_memsize = CFG_SDRAM_SIZE;
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bd->bi_flashstart = CFG_FLASH_BASE;
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#if defined(CFG_SRAM_BASE) && defined(CFG_SRAM_SIZE)
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bd->bi_sramstart= CFG_SRAM_BASE;
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bd->bi_sramsize = CFG_SRAM_SIZE;
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#endif
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bd->bi_baudrate = CONFIG_BAUDRATE;
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for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
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WATCHDOG_RESET ();
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if ((*init_fnc_ptr) () != 0) {
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hang ();
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}
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}
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WATCHDOG_RESET ();
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bd->bi_flashsize = flash_init();
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WATCHDOG_RESET ();
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mem_malloc_init();
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malloc_bin_reloc();
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env_relocate();
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bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
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s = getenv ("ethaddr");
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for (i = 0; i < 6; ++i) {
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bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
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if (s) s = (*e) ? e + 1 : e;
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}
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WATCHDOG_RESET ();
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devices_init();
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jumptable_init();
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console_init_r();
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/*
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*/
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WATCHDOG_RESET ();
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interrupt_init ();
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#ifdef CONFIG_STATUS_LED
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status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
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#endif
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/* main_loop */
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for (;;) {
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WATCHDOG_RESET ();
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main_loop ();
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}
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}
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/***********************************************************************/
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void hang (void)
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{
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#ifdef CONFIG_STATUS_LED
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status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
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status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING);
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#endif
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puts("### ERROR ### Please reset board ###\n");
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for (;;);
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}
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