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