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/*
* linux/arch/mips/txx9/generic/mem_tx4927.c
*
* 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;
}
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