2005-09-20 11:45:41 +08:00
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/*
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* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
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* Rewrite, cleanup:
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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_TCE_H
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#define _ASM_TCE_H
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/*
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* Tces come in two formats, one for the virtual bus and a different
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* format for PCI
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*/
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#define TCE_VB 0
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#define TCE_PCI 1
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2005-09-20 11:46:44 +08:00
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/* TCE page size is 4096 bytes (1 << 12) */
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#define TCE_SHIFT 12
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#define TCE_PAGE_SIZE (1 << TCE_SHIFT)
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#define TCE_PAGE_FACTOR (PAGE_SHIFT - TCE_SHIFT)
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2005-09-20 11:45:41 +08:00
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/* tce_entry
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* Used by pSeries (SMP) and iSeries/pSeries LPAR, but there it's
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* abstracted so layout is irrelevant.
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*/
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union tce_entry {
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unsigned long te_word;
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struct {
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unsigned int tb_cacheBits :6; /* Cache hash bits - not used */
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unsigned int tb_rsvd :6;
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unsigned long tb_rpn :40; /* Real page number */
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unsigned int tb_valid :1; /* Tce is valid (vb only) */
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unsigned int tb_allio :1; /* Tce is valid for all lps (vb only) */
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unsigned int tb_lpindex :8; /* LpIndex for user of TCE (vb only) */
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unsigned int tb_pciwr :1; /* Write allowed (pci only) */
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unsigned int tb_rdwr :1; /* Read allowed (pci), Write allowed (vb) */
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} te_bits;
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#define te_cacheBits te_bits.tb_cacheBits
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#define te_rpn te_bits.tb_rpn
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#define te_valid te_bits.tb_valid
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#define te_allio te_bits.tb_allio
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#define te_lpindex te_bits.tb_lpindex
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#define te_pciwr te_bits.tb_pciwr
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#define te_rdwr te_bits.tb_rdwr
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};
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#endif
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