1 /* $NetBSD: i80312_mem.c,v 1.4 2005/12/11 12:16:51 christos 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 <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: i80312_mem.c,v 1.4 2005/12/11 12:16:51 christos Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 48 #include <machine/bus.h> 49 50 #include <arm/xscale/i80312reg.h> 51 #include <arm/xscale/i80312var.h> 52 53 /* 54 * i80312_sdram_bounds: 55 * 56 * Retrieve the start and size of SDRAM. 57 */ 58 void 59 i80312_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh, 60 paddr_t *start, psize_t *size) 61 { 62 uint32_t sdbr, sbr0, sbr1; 63 uint32_t bank0, bank1; 64 65 sdbr = bus_space_read_4(st, sh, I80312_MEM_SB); 66 sbr0 = bus_space_read_4(st, sh, I80312_MEM_SB0); 67 sbr1 = bus_space_read_4(st, sh, I80312_MEM_SB1); 68 69 #ifdef VERBOSE_INIT_ARM 70 printf("i80312: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n", 71 sdbr, sbr0, sbr1); 72 #endif 73 74 *start = sdbr; 75 76 sdbr = (sdbr >> 25) & 0xf; 77 78 sbr0 = ((sbr0 >> 3) & 0x1f) - sdbr; 79 sbr1 = ((sbr1 >> 3) & 0x1f) - sbr0; 80 81 bank0 = sbr0 << 25; 82 bank1 = sbr1 << 25; 83 84 #ifdef VERBOSE_INIT_ARM 85 printf("i80312: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1); 86 #endif 87 88 *size = bank0 + bank1; 89 } 90