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

   1 /*      $NetBSD: integrator_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 ARM Integrator
  40  * core modules.
  41  */
  42
  43 #include <sys/types.h>
  44 #include <lib/libsa/stand.h>
  45
  46 #include "board.h"
  47
  48 #define INL(x)          *((volatile uint32_t *) (x))
  49
  50 void
  51 mem_init(void)
  52 {
  53         uint32_t cm_sdram;
  54         uint32_t heap, size;
  55
  56         cm_sdram = INL(0x10000020);
  57
  58         switch ((cm_sdram >> 2) & 0x7) {
  59         case 0:
  60                 size = 16 * 1024 * 1024;
  61                 break;
  62
  63         case 1:
  64                 size = 32 * 1024 * 1024;
  65                 break;
  66
  67         case 2:
  68                 size = 64 * 1024 * 1024;
  69                 break;
  70
  71         case 3:
  72                 size = 128 * 1024 * 1024;
  73                 break;
  74
  75         case 4:
  76                 size = 256 * 1024 * 1024;
  77                 break;
  78
  79         default:
  80                 printf("** CM_SDRAM retuns unknown value, using 16M\n");
  81                 size = 16 * 1024 * 1024;
  82                 break;
  83         }
  84
  85         /* Start is always 0. */
  86         heap = size - BOARD_HEAP_SIZE;
  87
  88         printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n", 0, size - 1, heap);
  89         setheap((void *)heap, (void *)(size - 1));
  90 }