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Annotation of sys/arch/alpha/tc/tc_sgmap.h, Revision 1.1

1.1     ! nbrk        1: /* $OpenBSD: tc_sgmap.h,v 1.1 2002/05/02 22:56:06 miod Exp $ */
        !             2: /* $NetBSD: tc_sgmap.h,v 1.2 1997/06/07 00:02:20 thorpej Exp $ */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1997 The NetBSD Foundation, Inc.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to The NetBSD Foundation
        !             9:  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
        !            10:  * NASA Ames Research Center.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. All advertising materials mentioning features or use of this software
        !            21:  *    must display the following acknowledgement:
        !            22:  *     This product includes software developed by the NetBSD
        !            23:  *     Foundation, Inc. and its contributors.
        !            24:  * 4. Neither the name of The NetBSD Foundation nor the names of its
        !            25:  *    contributors may be used to endorse or promote products derived
        !            26:  *    from this software without specific prior written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            29:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            30:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            31:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            32:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            33:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            34:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            35:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            36:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            37:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            38:  * POSSIBILITY OF SUCH DAMAGE.
        !            39:  */
        !            40:
        !            41: #define        SGMAP_TYPE              tc_sgmap
        !            42: #define        SGMAP_PTE_TYPE          u_int32_t
        !            43: #define        SGMAP_PTE_SPACING       2
        !            44:
        !            45: /*
        !            46:  * A TurboChannel SGMAP page table entry looks like this:
        !            47:  *
        !            48:  * 31                    23  22  21 20           4 3    0
        !            49:  * |     Discarded     | V | F | P | Page address | UNP |
        !            50:  *
        !            51:  * The page address is bits <29:13> of the physical address of the
        !            52:  * page.  The V bit is set if the PTE holds a valid mapping.
        !            53:  * The F (funny) bit forces a parity error.  The P bit is a
        !            54:  * hardware-generated parity bit.
        !            55:  */
        !            56: #define        SGPTE_PGADDR_SHIFT      9
        !            57: #define        SGPTE_VALID             0x00800000
        !            58:
        !            59: #include <alpha/dev/sgmapvar.h>
        !            60: #include <alpha/dev/sgmap_typedep.h>