board.c

source code of armboot for s3c4510

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
  */

#include "armboot.h"
#include "command.h"
#include "devices.h"
#include "version.h"
#ifdef CONFIG_S5N8947
#include "s5n8947.h"
#endif
#ifdef CONFIG_S3C2500
#include "s3c2500.h"
#endif
#ifdef CONFIG_S3C2510
#include "s3c2510.h"
#endif
#include "log.h"


#if defined(CONFIG_S5N8947) || defined(CONFIG_S3C2500) || defined(CONFIG_S3C2510)
extern void InitEtherApi(bd_t *bd);
#endif


#ifdef CONFIG_UCBOOTSTRAP	/* The uCbootstrap system calls use	*/
extern bd_t * bd_save;
#endif
//add by hill 20070924
extern int eth_init(bd_t * );
void eth_halt( void );

/*
 * Begin and End of memory area for malloc(), and current "brk"
 */
static  ulong   mem_malloc_start = 0;
static  ulong   mem_malloc_end   = 0;
static  ulong   mem_malloc_brk   = 0;


static void mem_malloc_init (ulong dest_addr)
{
    mem_malloc_start  = dest_addr;
    mem_malloc_end    = dest_addr + CONFIG_MALLOC_SIZE;
    mem_malloc_brk    = mem_malloc_start;
    
    memset ((void *)mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
}

void *sbrk (ptrdiff_t increment)
{
    ulong old = mem_malloc_brk;
    ulong new = old + increment;
    
    if ((new < mem_malloc_start) ||
	(new > mem_malloc_end) ) {
	return (NULL);
    }
    mem_malloc_brk = new;
    
    return ((void *)old);
}

/*
 * Breath some life into the board...
 *
 * Initialize an SMC for serial comms, and carry out some hardware
 * tests.
 *
 * The first part of initialization is running from Flash memory;
 * its main purpose is to initialize the RAM so that we
 * can relocate the monitor code to RAM.
 */
void start_armboot(void)
{
    bd_t bd;
	bd_t * bis;
    ulong size;
    uint 	utemp;
#ifdef CONFIG_UCBOOTSTRAP	/* The uCbootstrap system calls use	*/
	bd_save =&bd;
#endif

    /* set up bd strucuture */
    memset(&bd, 0, sizeof(bd));
    bd.bi_baudrate = CONFIG_BAUDRATE;

    /* basic cpu dependent setup */
    cpu_init(&bd);
   
    /* basic board dependent setup */
    board_init(&bd);

    /* initialize environment */
    env_init(&bd);

    /* serial communications setup */
 	serial_init(&bd);

	// initialize log library
//	InitLog();
#ifdef VIADBG
    display_banner(&bd);
#endif
    /* set up execptions */
    interrupt_init(&bd);

    /* configure available RAM banks */
    dram_init(&bd);
#ifdef VIADBG
    display_dram_config(&bd);
#endif
    /* configure available FLASH banks */
    size = flash_init(&bd);
#ifdef VIADBG
    display_flash_config(&bd, size);
#endif
    /* armboot_end is defined in the board-specific linker script */
	/* allocate heap */
    mem_malloc_init(_armboot_real_end);

    /* initialize environment */
    env_relocate(&bd);
#if defined(CONFIG_S3C2500) || defined(CONFIG_S3C2510)
    /* cache init	choish 20020828 */
    Cache_init(&bd);
    /* write buffer init  choish 20020828 */
    Wbuffer_init(&bd);
 #endif
    /* enable exceptions */
    enable_interrupts();

#if defined(CONFIG_S5N8947) || defined(CONFIG_S3C2500) || defined(CONFIG_S3C2510)
	InitEtherApi(&bd);
#endif    
	

 /*test , 20090911 by hill*/
#if 0
	for(utemp=0;utemp<10;utemp++)
	{
			ledFlash(0x60000000);
	}
#endif

	//eth_halt();
	eth_init(bis);

    /* main_loop() can return to retry autoboot, if so just run it again. */
    	for (;;) 
	{
			main_loop(&bd);
			
    	}

    /* NOTREACHED - no way out of command loop except booting */
}

void hang(void)
{
		puts ("### ERROR ### Please RESET the board ###\n");
		for (;;);
}