255033a9bb
* Unify (and fix) mem_tx4938.c and mem_tx4927.c * Simplify prom_init * Kill volatiles and unused definitions for tx4927.h and tx4938.h Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
|
|
* 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;
|
|
}
|