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      1 /*	$NetBSD: becc_mem.c,v 1.3 2006/01/16 19:34:53 he Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002, 2003 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  * ADI BECC companion chip.
     41  */
     42 
     43 #include <sys/types.h>
     44 #include <lib/libsa/stand.h>
     45 
     46 #include <arm/xscale/beccreg.h>
     47 
     48 #include <dev/pci/pcireg.h>
     49 
     50 #include "board.h"
     51 
     52 #define	BECC_PCICORE_READ(x)						\
     53 	*((volatile uint32_t *)					\
     54 	  (BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x)))
     55 
     56 #define	BECC_PCICORE_WRITE(x, v)					\
     57 	*((volatile uint32_t *)					\
     58 	  (BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x))) = (v)
     59 
     60 #define	BECC_SDRAM_BAR	(PCI_MAPREG_START + 0x08)
     61 
     62 void
     63 mem_init(void)
     64 {
     65 	uint32_t start, size, reg, save, heap;
     66 
     67 	start = BECC_SDRAM_BASE;
     68 
     69 	/*
     70 	 * BECC <= Rev7 can only address 64M through the inbound PCI
     71 	 * windows.  Limit memory to 64M on those revs.
     72 	 *
     73 	 * On >= Rev8, there is a BAR which covers all of SDRAM which
     74 	 * we can probe for the memory size.
     75 	 */
     76 	reg = BECC_PCICORE_READ(PCI_CLASS_REG);
     77 #ifdef BECC_SUPPORT_V7
     78 	if (PCI_REVISION(reg) <= BECC_REV_V7)
     79 		size = (64U * 1024 * 1024);
     80 	else {
     81 #endif
     82 		save = BECC_PCICORE_READ(BECC_SDRAM_BAR);
     83 		BECC_PCICORE_WRITE(BECC_SDRAM_BAR, 0xffffffffU);
     84 		reg = BECC_PCICORE_READ(BECC_SDRAM_BAR);
     85 		BECC_PCICORE_WRITE(BECC_SDRAM_BAR, save);
     86 		save = BECC_PCICORE_READ(BECC_SDRAM_BAR);
     87 
     88 		size = PCI_MAPREG_MEM_SIZE(reg);
     89 #ifdef BECC_SUPPORT_V7
     90 	}
     91 #endif
     92 
     93 	heap = (start + size) - BOARD_HEAP_SIZE;
     94 
     95 	printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
     96 	    start, (start + size) - 1, heap);
     97 	setheap((void *)heap, (void *)(start + size - 1));
     98 }
     99