/*
* 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;
}
Messung V0.5 in Prozent C=92 H=93 G=92
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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