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tc_sgmap.h revision 1.4.24.1 
      1  1.4.24.1    skrll /* $NetBSD: tc_sgmap.h,v 1.4.24.1 2017/08/28 17:51:27 skrll 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  1.4.24.1    skrll  * 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