i80321_mcu.c revision 256281
1/* $NetBSD: i80321_mcu.c,v 1.2 2003/07/15 00:24:54 lukem 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/cdefs.h> 43__FBSDID("$FreeBSD: stable/10/sys/arm/xscale/i80321/i80321_mcu.c 139735 2005-01-05 21:58:49Z imp $"); 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/bus.h> 48 49#include <machine/bus.h> 50 51#include <arm/xscale/i80321/i80321reg.h> 52#include <arm/xscale/i80321/i80321var.h> 53 54/* 55 * i80321_sdram_bounds: 56 * 57 * Retrieve the start and size of SDRAM. 58 */ 59void 60i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh, 61 vm_paddr_t *start, vm_size_t *size) 62{ 63 uint32_t sdbr, sbr0, sbr1; 64 uint32_t bank0, bank1; 65 66 sdbr = bus_space_read_4(st, sh, MCU_SDBR); 67 sbr0 = bus_space_read_4(st, sh, MCU_SBR0); 68 sbr1 = bus_space_read_4(st, sh, MCU_SBR1); 69 70#ifdef VERBOSE_INIT_ARM 71 printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n", 72 sdbr, sbr0, sbr1); 73#endif 74 75 *start = sdbr; 76 77 sdbr = (sdbr >> 25) & 0x1f; 78 79 sbr0 &= 0x3f; 80 sbr1 &= 0x3f; 81 82 bank0 = (sbr0 - sdbr) << 25; 83 bank1 = (sbr1 - sbr0) << 25; 84 85#ifdef VERBOSE_INIT_ARM 86 printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1); 87#endif 88 89 *size = bank0 + bank1; 90} 91