sys/arch/evbarm/stand/board/i80312_mem.c

   1 /*      $NetBSD: i80312_mem.c,v 1.3 2005/12/24 20:07:03 perry Exp $     */
   2
   3 /*
   4  * Copyright (c) 2002 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * This file provides the mem_init() function for boards using the
  40  * Intel i80312 companion I/O chip.
  41  */
  42
  43 #include <sys/types.h>
  44 #include <lib/libsa/stand.h>
  45
  46 #include <arm/xscale/i80312reg.h>
  47
  48 #include "board.h"
  49
  50 #define INL(x)          *((volatile uint32_t *) \
  51                           (I80312_PMMR_BASE + I80312_MEM_BASE + (x)))
  52
  53 void
  54 mem_init(void)
  55 {
  56         uint32_t sdbr, sbr0, sbr1;
  57         uint32_t bank0, bank1;
  58         uint32_t start, size, heap;
  59
  60         sdbr = INL(I80312_MEM_SB);
  61         sbr0 = INL(I80312_MEM_SB0);
  62         sbr1 = INL(I80312_MEM_SB1);
  63
  64         start = sdbr;
  65
  66         sdbr = (sdbr >> 25) & 0xf;
  67
  68         sbr0 = ((sbr0 >> 3) & 0x1f) - sdbr;
  69         sbr1 = ((sbr1 >> 3) & 0x1f) - sbr0;
  70
  71         bank0 = sbr0 << 25;
  72         bank1 = sbr1 << 25;
  73
  74         size = bank0 + bank1;
  75
  76         heap = (start + size) - BOARD_HEAP_SIZE;
  77
  78         printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
  79             start, (start + size) - 1, heap);
  80         setheap((void *)heap, (void *)(start + size - 1));
  81 }