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d0035c62d9
There are potential cases in the future where the IOMMU might be mapping smaller pages than the regular MMU is using. Keep the allocator working on MMU pagesizes, but the low-level mapping functions need to map more than one TCE entry per page to deal with this. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ASM_DART_H
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#define _ASM_DART_H
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/* physical base of DART registers */
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#define DART_BASE 0xf8033000UL
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/* Offset from base to control register */
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#define DARTCNTL 0
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/* Offset from base to exception register */
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#define DARTEXCP 0x10
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/* Offset from base to TLB tag registers */
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#define DARTTAG 0x1000
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/* Control Register fields */
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/* base address of table (pfn) */
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#define DARTCNTL_BASE_MASK 0xfffff
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#define DARTCNTL_BASE_SHIFT 12
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#define DARTCNTL_FLUSHTLB 0x400
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#define DARTCNTL_ENABLE 0x200
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/* size of table in pages */
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#define DARTCNTL_SIZE_MASK 0x1ff
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#define DARTCNTL_SIZE_SHIFT 0
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/* DART table fields */
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#define DARTMAP_VALID 0x80000000
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#define DARTMAP_RPNMASK 0x00ffffff
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#define DART_SHIFT 12
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#define DART_PAGE_SIZE (1 << DART_SHIFT)
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#define DART_PAGE_FACTOR (PAGE_SHIFT - DART_SHIFT)
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#endif
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