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      1  1.6    skrll /*	$NetBSD: i80312_mem.c,v 1.6 2018/07/31 06:46:25 skrll Exp $	*/
      2  1.1  thorpej 
      3  1.1  thorpej /*
      4  1.1  thorpej  * Copyright (c) 2001 Wasabi Systems, Inc.
      5  1.1  thorpej  * All rights reserved.
      6  1.1  thorpej  *
      7  1.1  thorpej  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  1.1  thorpej  *
      9  1.1  thorpej  * Redistribution and use in source and binary forms, with or without
     10  1.1  thorpej  * modification, are permitted provided that the following conditions
     11  1.1  thorpej  * are met:
     12  1.1  thorpej  * 1. Redistributions of source code must retain the above copyright
     13  1.1  thorpej  *    notice, this list of conditions and the following disclaimer.
     14  1.1  thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1  thorpej  *    notice, this list of conditions and the following disclaimer in the
     16  1.1  thorpej  *    documentation and/or other materials provided with the distribution.
     17  1.1  thorpej  * 3. All advertising materials mentioning features or use of this software
     18  1.1  thorpej  *    must display the following acknowledgement:
     19  1.1  thorpej  *	This product includes software developed for the NetBSD Project by
     20  1.1  thorpej  *	Wasabi Systems, Inc.
     21  1.1  thorpej  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  1.1  thorpej  *    or promote products derived from this software without specific prior
     23  1.1  thorpej  *    written permission.
     24  1.1  thorpej  *
     25  1.1  thorpej  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  1.1  thorpej  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  1.1  thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  1.1  thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  1.1  thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  1.1  thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  1.1  thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  1.1  thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  1.1  thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  1.1  thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  1.1  thorpej  * POSSIBILITY OF SUCH DAMAGE.
     36  1.1  thorpej  */
     37  1.1  thorpej 
     38  1.1  thorpej /*
     39  1.1  thorpej  * Intel i80312 Companion I/O memory controller support.
     40  1.1  thorpej  */
     41  1.3    lukem 
     42  1.6    skrll #include "opt_arm_debug.h"
     43  1.6    skrll 
     44  1.3    lukem #include <sys/cdefs.h>
     45  1.6    skrll __KERNEL_RCSID(0, "$NetBSD: i80312_mem.c,v 1.6 2018/07/31 06:46:25 skrll Exp $");
     46  1.1  thorpej 
     47  1.1  thorpej #include <sys/param.h>
     48  1.1  thorpej #include <sys/systm.h>
     49  1.1  thorpej 
     50  1.5   dyoung #include <sys/bus.h>
     51  1.1  thorpej 
     52  1.1  thorpej #include <arm/xscale/i80312reg.h>
     53  1.1  thorpej #include <arm/xscale/i80312var.h>
     54  1.1  thorpej 
     55  1.1  thorpej /*
     56  1.1  thorpej  * i80312_sdram_bounds:
     57  1.1  thorpej  *
     58  1.1  thorpej  *	Retrieve the start and size of SDRAM.
     59  1.1  thorpej  */
     60  1.1  thorpej void
     61  1.1  thorpej i80312_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
     62  1.1  thorpej     paddr_t *start, psize_t *size)
     63  1.1  thorpej {
     64  1.1  thorpej 	uint32_t sdbr, sbr0, sbr1;
     65  1.1  thorpej 	uint32_t bank0, bank1;
     66  1.1  thorpej 
     67  1.1  thorpej 	sdbr = bus_space_read_4(st, sh, I80312_MEM_SB);
     68  1.1  thorpej 	sbr0 = bus_space_read_4(st, sh, I80312_MEM_SB0);
     69  1.1  thorpej 	sbr1 = bus_space_read_4(st, sh, I80312_MEM_SB1);
     70  1.1  thorpej 
     71  1.2  thorpej #ifdef VERBOSE_INIT_ARM
     72  1.1  thorpej 	printf("i80312: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
     73  1.1  thorpej 	    sdbr, sbr0, sbr1);
     74  1.1  thorpej #endif
     75  1.1  thorpej 
     76  1.1  thorpej 	*start = sdbr;
     77  1.1  thorpej 
     78  1.1  thorpej 	sdbr = (sdbr >> 25) & 0xf;
     79  1.1  thorpej 
     80  1.1  thorpej 	sbr0 = ((sbr0 >> 3) & 0x1f) - sdbr;
     81  1.1  thorpej 	sbr1 = ((sbr1 >> 3) & 0x1f) - sbr0;
     82  1.1  thorpej 
     83  1.1  thorpej 	bank0 = sbr0 << 25;
     84  1.1  thorpej 	bank1 = sbr1 << 25;
     85  1.1  thorpej 
     86  1.2  thorpej #ifdef VERBOSE_INIT_ARM
     87  1.1  thorpej 	printf("i80312: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
     88  1.1  thorpej #endif
     89  1.1  thorpej 
     90  1.1  thorpej 	*size = bank0 + bank1;
     91  1.1  thorpej }
     92