board/xes/common/fsl_8xxx_misc.c

/*
 * Copyright 2008 Extreme Engineering Solutions, Inc.
 *
 * 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 <asm/mmu.h>

/*
 * Return a board's derivative model number.  For example:
 * return 2 for the XPedite5372 and return 1 for the XPedite5201.
 */
uint get_board_derivative(void)
{
#if defined(CONFIG_MPC85xx)
       volatile ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
#elif defined(CONFIG_MPC86xx)
       volatile immap_t *immap = (immap_t *)CONFIG_SYS_CCSRBAR;
       volatile ccsr_gur_t *gur = &immap->im_gur;
#endif

       /*
        * The top 4 lines of the local bus address are pulled low/high and
        * can be read to determine the least significant digit of a board's
        * model number.
        */
       return gur->gpporcr >> 28;
}