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      1 /* $NetBSD: tc_sgmap.h,v 1.5 2017/06/22 16:46:52 flxd Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #define	SGMAP_TYPE		tc_sgmap
     34 #define	SGMAP_PTE_TYPE		uint32_t
     35 #define	SGMAP_PTE_SPACING	2
     36 
     37 /*
     38  * A TURBOchannel SGMAP page table entry looks like this:
     39  *
     40  * 31                    23  22  21 20           4 3    0
     41  * |     Discarded     | V | F | P | Page address | UNP |
     42  *
     43  * The page address is bits <29:13> of the physical address of the
     44  * page.  The V bit is set if the PTE holds a valid mapping.
     45  * The F (funny) bit forces a parity error.  The P bit is a
     46  * hardware-generated parity bit.
     47  */
     48 #define	SGPTE_PGADDR_SHIFT	9
     49 #define	SGPTE_VALID		0x00800000
     50 
     51 #include <alpha/common/sgmapvar.h>
     52 #include <alpha/common/sgmap_typedep.h>
     53