1 /* $NetBSD: i80321_mcu.c,v 1.1 2002/03/27 21:45:47 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 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 * Intel i80321 I/O Processor memory controller support. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <machine/bus.h> 46 47 #include <arm/xscale/i80321reg.h> 48 #include <arm/xscale/i80321var.h> 49 50 /* 51 * i80321_sdram_bounds: 52 * 53 * Retrieve the start and size of SDRAM. 54 */ 55 void 56 i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh, 57 paddr_t *start, psize_t *size) 58 { 59 uint32_t sdbr, sbr0, sbr1; 60 uint32_t bank0, bank1; 61 62 sdbr = bus_space_read_4(st, sh, MCU_SDBR); 63 sbr0 = bus_space_read_4(st, sh, MCU_SBR0); 64 sbr1 = bus_space_read_4(st, sh, MCU_SBR1); 65 66 #ifdef VERBOSE_INIT_ARM 67 printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n", 68 sdbr, sbr0, sbr1); 69 #endif 70 71 *start = sdbr; 72 73 sdbr = (sdbr >> 25) & 0x1f; 74 75 sbr0 &= 0x3f; 76 sbr1 &= 0x3f; 77 78 bank0 = (sbr0 - sdbr) << 25; 79 bank1 = (sbr1 - sbr0) << 25; 80 81 #ifdef VERBOSE_INIT_ARM 82 printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1); 83 #endif 84 85 *size = bank0 + bank1; 86 } 87