board/gcplus/gcplus.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * 2003-2004 (c) MontaVista Software, Inc.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <SA-1100.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 /*
  33  * Miscelaneous platform dependent initialisations
  34  */
  35
  36 int
  37 board_init(void)
  38 {
  39         gd->bd->bi_arch_number = MACH_TYPE_GRAPHICSCLIENT;
  40
  41         gd->bd->bi_boot_params = 0xc000003c; /* Weird address? */
  42
  43         /* Most of the ADS GCPlus I/O is connected to Static nCS2.
  44          * So I'm brute forcing nCS2 timiming here for worst case.
  45          */
  46         MSC1 &= ~0xFFFF;
  47         MSC1 |= 0x8649;
  48
  49         /* Nothing is connected to Static nCS4 or nCS5. But I'm using
  50          * nCS4 as a paranoia safe guard to force nCS2, nOE; nWE high
  51          * after accessing I/O via (non-VLIO) nCS2. What can I say, I'm
  52          * paranoid and lack decent tools to alleviate my fear. I sure
  53          * do wish I had a logic analyzer. : (
  54          */
  55
  56         MSC2 =  0xfff9fff9;
  57
  58         return 0;
  59 }
  60
  61 int
  62 dram_init(void)
  63 {
  64         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  65         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  66         gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
  67         gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
  68
  69         return (0);
  70 }