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https://source.denx.de/u-boot/u-boot.git
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158 lines
4.1 KiB
C
158 lines
4.1 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 <stdio_dev.h>
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#include <watchdog.h>
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#include <malloc.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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#if defined(CONFIG_SYS_NIOS_EPCSBASE)
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#include <nios2-epcs.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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typedef int (init_fnc_t) (void);
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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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#if defined(CONFIG_SYS_NIOS_EPCSBASE)
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epcs_reset,
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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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/* Pointer is writable since we allocated a register for it.
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* Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
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*/
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gd = (gd_t *)CONFIG_SYS_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, CONFIG_SYS_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 = CONFIG_SYS_SDRAM_BASE;
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bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
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bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
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#if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
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bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
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bd->bi_sramsize = CONFIG_SYS_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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/* The Malloc area is immediately below the monitor copy in RAM */
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mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
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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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env_relocate();
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bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
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WATCHDOG_RESET ();
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stdio_init();
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jumptable_init();
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console_init_r();
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WATCHDOG_RESET ();
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interrupt_init ();
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#if defined(CONFIG_BOARD_LATE_INIT)
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board_late_init ();
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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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disable_interrupts ();
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puts("### ERROR ### Please reset board ###\n");
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for (;;);
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}
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