/*
 * Copyright (C) 2007,2008
 * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
 *
 * 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 <common.h>
#include <command.h>
#include <malloc.h>
#include <devices.h>
#include <timestamp.h>
#include <version.h>
#include <watchdog.h>
#include <net.h>
#include <environment.h>

extern void malloc_bin_reloc (void);
extern int cpu_init(void);
extern int board_init(void);
extern int dram_init(void);
extern int timer_init(void);

const char version_string[] = U_BOOT_VERSION" ("U_BOOT_DATE" - "U_BOOT_TIME")";

unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN;

static unsigned long mem_malloc_start;
static unsigned long mem_malloc_end;
static unsigned long mem_malloc_brk;

static void mem_malloc_init(void)
{

        mem_malloc_start = (TEXT_BASE - CONFIG_SYS_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN);
        mem_malloc_end = (mem_malloc_start + CONFIG_SYS_MALLOC_LEN - 16);
        mem_malloc_brk = mem_malloc_start;
        memset((void *) mem_malloc_start, 0,
                (mem_malloc_end - mem_malloc_start));
}

void *sbrk(ptrdiff_t increment)
{
        unsigned long old = mem_malloc_brk;
        unsigned long new = old + increment;

        if ((new < mem_malloc_start) ||
            (new > mem_malloc_end)) {
                return NULL;
        }

        mem_malloc_brk = new;
        return (void *) old;
}

static int sh_flash_init(void)
{
        DECLARE_GLOBAL_DATA_PTR;

        gd->bd->bi_flashsize = flash_init();
        printf("FLASH: %ldMB\n", gd->bd->bi_flashsize / (1024*1024));

        return 0;
}

#if defined(CONFIG_CMD_NAND)
# include <nand.h>
# define INIT_FUNC_NAND_INIT nand_init,
#else
# define INIT_FUNC_NAND_INIT
#endif /* CONFIG_CMD_NAND */

#if defined(CONFIG_WATCHDOG)
extern int watchdog_init(void);
extern int watchdog_disable(void);
# define INIT_FUNC_WATCHDOG_INIT        watchdog_init,
# define WATCHDOG_DISABLE               watchdog_disable
#else
# define INIT_FUNC_WATCHDOG_INIT
# define WATCHDOG_DISABLE
#endif /* CONFIG_WATCHDOG */

#if defined(CONFIG_CMD_IDE)
# include <ide.h>
# define INIT_FUNC_IDE_INIT     ide_init,
#else
# define INIT_FUNC_IDE_INIT
#endif /* CONFIG_CMD_IDE */

#if defined(CONFIG_PCI)
#include <pci.h>
static int sh_pci_init(void)
{
        pci_init();
        return 0;
}
# define INIT_FUNC_PCI_INIT sh_pci_init,
#else
# define INIT_FUNC_PCI_INIT
#endif /* CONFIG_PCI */

static int sh_mem_env_init(void)
{
        mem_malloc_init();
        malloc_bin_reloc();
        env_relocate();
        jumptable_init();
        return 0;
}

#if defined(CONFIG_CMD_NET)
static int sh_net_init(void)
{
        DECLARE_GLOBAL_DATA_PTR;
        char *s, *e;
        int i;

        gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");
        s = getenv("ethaddr");
        for (i = 0; i < 6; ++i) {
                gd->bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
                if (s)
                        s = (*e) ? e + 1 : e;
        }

        return 0;
}
#endif

typedef int (init_fnc_t) (void);

init_fnc_t *init_sequence[] =
{
        cpu_init,               /* basic cpu dependent setup */
        board_init,             /* basic board dependent setup */
        interrupt_init, /* set up exceptions */
        env_init,               /* event init */
        serial_init,    /* SCIF init */
        INIT_FUNC_WATCHDOG_INIT /* watchdog init */
        console_init_f,
        display_options,
        checkcpu,
        checkboard,             /* Check support board */
        dram_init,              /* SDRAM init */
        timer_init,             /* SuperH Timer (TCNT0 only) init */
        sh_flash_init,  /* Flash memory(NOR) init*/
        sh_mem_env_init,
        INIT_FUNC_NAND_INIT/* Flash memory (NAND) init */
        INIT_FUNC_PCI_INIT      /* PCI init */
        devices_init,
        console_init_r,
        interrupt_init,
#ifdef BOARD_LATE_INIT
        board_late_init,
#endif
#if defined(CONFIG_CMD_NET)
        sh_net_init,            /* SH specific eth init */
#endif
        NULL                    /* Terminate this list */
};

void sh_generic_init(void)
{
        DECLARE_GLOBAL_DATA_PTR;

        bd_t *bd;
        init_fnc_t **init_fnc_ptr;

        memset(gd, 0, CONFIG_SYS_GBL_DATA_SIZE);

        gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */

        gd->bd = (bd_t *)(gd + 1);      /* At end of global data */
        gd->baudrate = CONFIG_BAUDRATE;

        gd->cpu_clk = CONFIG_SYS_CLK_FREQ;

        bd = gd->bd;
        bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
        bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
        bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
#if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
        bd->bi_sramstart = CONFIG_SYS_SRAM_BASE;
        bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
#endif
        bd->bi_baudrate = CONFIG_BAUDRATE;

        for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
                WATCHDOG_RESET();
                if ((*init_fnc_ptr) () != 0)
                        hang();
        }

#ifdef CONFIG_WATCHDOG
        /* disable watchdog if environment is set */
        {
                char *s = getenv("watchdog");
                if (s != NULL)
                        if (strncmp(s, "off", 3) == 0)
                                WATCHDOG_DISABLE();
        }
#endif /* CONFIG_WATCHDOG*/


#if defined(CONFIG_CMD_NET)
        {
                char *s;
                puts("Net:   ");
                eth_initialize(gd->bd);

                s = getenv("bootfile");
                if (s != NULL)
                        copy_filename(BootFile, s, sizeof(BootFile));
        }
#endif /* CONFIG_CMD_NET */

        while (1) {
                WATCHDOG_RESET();
                main_loop();
        }
}

/***********************************************************************/

void hang(void)
{
        puts("Board ERROR\n");
        for (;;)
                ;
}