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      1 /*	$NetBSD: i80321_mem.c,v 1.4 2006/01/16 19:34:53 he 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 i80321 I/O Processor.
     41  */
     42 
     43 #include <sys/types.h>
     44 #include <lib/libsa/stand.h>
     45 
     46 #include <arm/xscale/i80321reg.h>
     47 
     48 #include "board.h"
     49 
     50 #define	INL(x)		*((volatile uint32_t *) \
     51 			  (VERDE_PMMR_BASE + VERDE_MCU_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(MCU_SDBR);
     61 	sbr0 = INL(MCU_SBR0);
     62 	sbr1 = INL(MCU_SBR1);
     63 
     64 	start = sdbr;
     65 
     66 	sdbr = (sdbr >> 25) & 0x1f;
     67 
     68 	sbr0 &= 0x3f;
     69 	sbr1 &= 0x3f;
     70 
     71 	bank0 = (sbr0 - sdbr) << 25;
     72 	bank1 = (sbr1 - sbr0) << 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 }
     82