/* * common tx4927 memory interface * * Author: MontaVista Software, Inc. * source@mvista.com * * Copyright 2001-2002 MontaVista Software Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/init.h> #include <linux/types.h> #include <linux/io.h> #include <asm/txx9/tx4927.h> static unsigned int __init tx4927_process_sdccr(u64 __iomem *addr) { u64 val; unsigned int sdccr_ce; unsigned int sdccr_bs; unsigned int sdccr_rs; unsigned int sdccr_cs; unsigned int sdccr_mw; unsigned int bs = 0; unsigned int rs = 0; unsigned int cs = 0; unsigned int mw = 0; val = __raw_readq(addr); /* MVMCP -- need #defs for these bits masks */ sdccr_ce = ((val & (1 << 10)) >> 10); sdccr_bs = ((val & (1 << 8)) >> 8); sdccr_rs = ((val & (3 << 5)) >> 5); sdccr_cs = ((val & (7 << 2)) >> 2); sdccr_mw = ((val & (1 << 0)) >> 0); if (sdccr_ce) { bs = 2 << sdccr_bs; rs = 2048 << sdccr_rs; cs = 256 << sdccr_cs; mw = 8 >> sdccr_mw; } return rs * cs * mw * bs; } unsigned int __init tx4927_get_mem_size(void) { unsigned int total = 0; int i; for (i = 0; i < ARRAY_SIZE(tx4927_sdramcptr->cr); i++) total += tx4927_process_sdccr(&tx4927_sdramcptr->cr[i]); return total; }