1/*- 2 * Copyright (c) 2006 Olivier Houchard 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 * POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/module.h> 35 36#include <machine/bus.h> 37#include <arm/xscale/i8134x/i81342reg.h> 38#include <arm/xscale/i8134x/i81342var.h> 39 40void 41i81342_sdram_bounds(bus_space_tag_t bt, bus_space_handle_t bh, 42 vm_paddr_t *start, vm_size_t *size) 43{ 44 uint32_t reg; 45 int bank_nb; 46 47 reg = bus_space_read_4(bt, bh, SMC_SDBR); 48 *start = (reg & SMC_SDBR_BASEADDR_MASK); 49 reg = bus_space_read_4(bt, bh, SMC_SBSR); 50 if (reg & SMC_SBSR_BANK_NB) 51 bank_nb = 1; 52 else 53 bank_nb = 2; 54 55 *size = (reg & SMC_SBSR_BANK_SZ_MASK) * bank_nb; 56} 57