elppc.c

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2002 ELTEC Elektronik AG
 * Frank Gottschling <[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 <common.h>
#include <command.h>
#include <mpc106.h>
#include <video_fb.h>

/* ------------------------------------------------------------------------- */

int checkboard (void)
{
    puts ("Board: ELTEC PowerPC\n");
    return (0);
}

/* ------------------------------------------------------------------------- */

int checkflash (void)
{
    /* TODO */
    printf ("Test not implemented !\n");
    return (0);
}

/* ------------------------------------------------------------------------- */

static unsigned int mpc106_read_cfg_dword (unsigned int reg)
{
    unsigned int reg_addr = MPC106_REG | (reg & 0xFFFFFFFC);

    out32r(MPC106_REG_ADDR, reg_addr);

    return (in32r(MPC106_REG_DATA | (reg & 0x3)));
}

/* ------------------------------------------------------------------------- */

long int dram_size (int board_type)
{
    /*
    * No actual initialisation to do - done when setting up
    * PICRs MCCRs ME/SARs etc in asm_init.S.
    */

    register unsigned long i, msar1, mear1, memSize;

#if defined(CFG_MEMTEST)
    register unsigned long reg;

    printf("Testing DRAM\n");

    /* write each mem addr with it's address */
    for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg+=4)
        *reg = reg;

    for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg+=4)
    {
        if (*reg != reg)
        return -1;
    }
#endif

    /*
    * Since MPC107 memory controller chip has already been set to
    * control all memory, just read and interpret its memory boundery register.
    */
    memSize = 0;
    msar1 = mpc106_read_cfg_dword(MPC106_MSAR1);
    mear1 = mpc106_read_cfg_dword(MPC106_MEAR1);
    i     = mpc106_read_cfg_dword(MPC106_MBER) & 0xf;

    do
    {
        if (i & 0x01)   /* is bank enabled ? */
            memSize += (mear1 & 0xff) - (msar1 & 0xff) + 1;
        msar1 >>= 8;
        mear1 >>= 8;
        i     >>= 1;
    } while (i);

    return (memSize * 0x100000);
}
/* ------------------------------------------------------------------------- */

long int initdram(int board_type)
{
    return dram_size(board_type);
}

/* ------------------------------------------------------------------------- */

/*
 * The BAB 911 can be reset by writing bit 0 of the Processor Initialization
 * Register PI in the MPC 107 (at offset 0x41090 of the Embedded Utilities
 * Memory Block).
 */
void do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
    out8(MPC107_EUMB_PI, 1);
}

/* ------------------------------------------------------------------------- */

#if defined(CONFIG_WATCHDOG)

/*
 * Since the 7xx CPUs don't have an internal watchdog, this function is
 * board specific.
 */
void watchdog_reset(void)
{
}
#endif    /* CONFIG_WATCHDOG */

/* ------------------------------------------------------------------------- */

void after_reloc (ulong dest_addr)
{
    DECLARE_GLOBAL_DATA_PTR;

    /*
     * Jump to the main U-Boot board init code
     */
    board_init_r(gd, dest_addr);
}

/* ------------------------------------------------------------------------- */

#ifdef CONFIG_CONSOLE_EXTRA_INFO
extern GraphicDevice smi;

void video_get_info_str (int line_number, char *info)
{
    /* init video info strings for graphic console */
    switch (line_number)
    {
    case 1:
        sprintf (info," MPC7xx V%d.%d at %d / %d MHz",
            (get_pvr() >> 8) & 0xFF,
            get_pvr() & 0xFF,
            400,
            100);
        return;
    case 2:
        sprintf (info, " ELTEC ELPPC with %ld MB DRAM and %ld MB FLASH",
            dram_size(0)/0x100000,
            flash_init()/0x100000);
        return;
    case 3:
        sprintf (info, " %s", smi.modeIdent);
        return;
    }

    /* no more info lines */
    *info = 0;
    return;
}
#endif