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tc_sgmap.h revision 1.4.6.1 
      1  1.4.6.1  jdolecek /* $NetBSD: tc_sgmap.h,v 1.4.6.1 2017/12/03 11:35:47 jdolecek Exp $ */
      2      1.2   thorpej 
      3      1.2   thorpej /*-
      4      1.2   thorpej  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5      1.2   thorpej  * All rights reserved.
      6      1.2   thorpej  *
      7      1.2   thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8      1.2   thorpej  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9      1.2   thorpej  * NASA Ames Research Center.
     10      1.2   thorpej  *
     11      1.2   thorpej  * Redistribution and use in source and binary forms, with or without
     12      1.2   thorpej  * modification, are permitted provided that the following conditions
     13      1.2   thorpej  * are met:
     14      1.2   thorpej  * 1. Redistributions of source code must retain the above copyright
     15      1.2   thorpej  *    notice, this list of conditions and the following disclaimer.
     16      1.2   thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     17      1.2   thorpej  *    notice, this list of conditions and the following disclaimer in the
     18      1.2   thorpej  *    documentation and/or other materials provided with the distribution.
     19      1.2   thorpej  *
     20      1.2   thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21      1.2   thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22      1.2   thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23      1.2   thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24      1.2   thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25      1.2   thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26      1.2   thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27      1.2   thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28      1.2   thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29      1.2   thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30      1.2   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     31      1.2   thorpej  */
     32      1.2   thorpej 
     33      1.2   thorpej #define	SGMAP_TYPE		tc_sgmap
     34      1.4      matt #define	SGMAP_PTE_TYPE		uint32_t
     35      1.2   thorpej #define	SGMAP_PTE_SPACING	2
     36      1.2   thorpej 
     37      1.2   thorpej /*
     38  1.4.6.1  jdolecek  * A TURBOchannel SGMAP page table entry looks like this:
     39      1.2   thorpej  *
     40      1.2   thorpej  * 31                    23  22  21 20           4 3    0
     41      1.2   thorpej  * |     Discarded     | V | F | P | Page address | UNP |
     42      1.2   thorpej  *
     43      1.2   thorpej  * The page address is bits <29:13> of the physical address of the
     44      1.2   thorpej  * page.  The V bit is set if the PTE holds a valid mapping.
     45      1.2   thorpej  * The F (funny) bit forces a parity error.  The P bit is a
     46      1.2   thorpej  * hardware-generated parity bit.
     47      1.2   thorpej  */
     48      1.2   thorpej #define	SGPTE_PGADDR_SHIFT	9
     49      1.2   thorpej #define	SGPTE_VALID		0x00800000
     50      1.2   thorpej 
     51      1.2   thorpej #include <alpha/common/sgmapvar.h>
     52      1.2   thorpej #include <alpha/common/sgmap_typedep.h>
     53