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      1 /*	$NetBSD: integrator_mem.c,v 1.5 2023/06/24 05:43:26 msaitoh 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 returns 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 }
     91