1/* $NetBSD: i80312_mem.c,v 1.6 2018/07/31 06:46:25 skrll Exp $ */ 2 3/* 4 * Copyright (c) 2001 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 * Intel i80312 Companion I/O memory controller support. 40 */ 41 42#include "opt_arm_debug.h" 43 44#include <sys/cdefs.h> 45__KERNEL_RCSID(0, "$NetBSD: i80312_mem.c,v 1.6 2018/07/31 06:46:25 skrll Exp $"); 46 47#include <sys/param.h> 48#include <sys/systm.h> 49 50#include <sys/bus.h> 51 52#include <arm/xscale/i80312reg.h> 53#include <arm/xscale/i80312var.h> 54 55/* 56 * i80312_sdram_bounds: 57 * 58 * Retrieve the start and size of SDRAM. 59 */ 60void 61i80312_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh, 62 paddr_t *start, psize_t *size) 63{ 64 uint32_t sdbr, sbr0, sbr1; 65 uint32_t bank0, bank1; 66 67 sdbr = bus_space_read_4(st, sh, I80312_MEM_SB); 68 sbr0 = bus_space_read_4(st, sh, I80312_MEM_SB0); 69 sbr1 = bus_space_read_4(st, sh, I80312_MEM_SB1); 70 71#ifdef VERBOSE_INIT_ARM 72 printf("i80312: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n", 73 sdbr, sbr0, sbr1); 74#endif 75 76 *start = sdbr; 77 78 sdbr = (sdbr >> 25) & 0xf; 79 80 sbr0 = ((sbr0 >> 3) & 0x1f) - sdbr; 81 sbr1 = ((sbr1 >> 3) & 0x1f) - sbr0; 82 83 bank0 = sbr0 << 25; 84 bank1 = sbr1 << 25; 85 86#ifdef VERBOSE_INIT_ARM 87 printf("i80312: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1); 88#endif 89 90 *size = bank0 + bank1; 91} 92