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Annotation of sys/arch/solbourne/include/pte.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: pte.h,v 1.1 2005/04/19 21:30:18 miod Exp $    */
        !             2: /*
        !             3:  * Copyright (c) 2005, Miodrag Vallat
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  *
        !            14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            15:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            16:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
        !            17:  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
        !            18:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
        !            19:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        !            20:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            21:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
        !            22:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
        !            23:  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            24:  * POSSIBILITY OF SUCH DAMAGE.
        !            25:  */
        !            26:
        !            27: /*
        !            28:  * KAP page table entries.
        !            29:  *
        !            30:  * Ref/Mod bits are handled in software.
        !            31:  */
        !            32:
        !            33: /*
        !            34:  * First-level : Page Directory Tables (topmost 9 bits of a va)
        !            35:  *
        !            36:  * Page directory entries contain both the pa and the va of the page
        !            37:  * tables they point to.
        !            38:  */
        !            39:
        !            40: #define        PDT_INDEX_SIZE          9
        !            41: #define        PDT_INDEX_SHIFT         23
        !            42: #define        PDT_INDEX_MASK          0xff800000
        !            43:
        !            44: /*
        !            45:  * Second-level: Page Table Entries (middle 10 bits of a va)
        !            46:  */
        !            47:
        !            48: #define        PT_INDEX_SIZE           10
        !            49: #define        PT_INDEX_SHIFT          13
        !            50: #define        PT_INDEX_MASK           0x007fe000
        !            51:
        !            52: #define        PG_V                    0x00000001
        !            53: #define        PG_NV                   0x00000000
        !            54: #define        PG_RO                   0x00000002      /* read only */
        !            55: #define        PG_RW                   0x00000000
        !            56: #define        PG_PROT                 (PG_RO | PG_S)
        !            57: #define        PG_S                    0x00000004      /* supervisor only */
        !            58: #define        PG_MA                   0x00000018      /* memory attributes mask */
        !            59: #define        PG_G                    0x00000020      /* global */
        !            60: /* software bits from now on... */
        !            61: #define        PG_W                    0x00000040      /* wired */
        !            62: #define        PG_M                    0x00000080      /* modified */
        !            63: #define        PG_U                    0x00000100      /* referenced */
        !            64:                        /*      0x00001e00      unused */
        !            65: #define        PG_FRAME                0xffffe000      /* PFN mask */
        !            66:
        !            67: /* memory attributes */
        !            68: #define        PG_IO                   0x00000000      /* not cached */
        !            69: #define        PG_CACHE                0x00000008      /* cached */
        !            70: #define        PG_BYTE_SHARED          0x00000010      /* byte-writeable shared */
        !            71: #define        PG_SHARED               0x00000018      /* non byte-writeable shared */
        !            72:
        !            73: /*
        !            74:  * Page directory constants
        !            75:  */
        !            76:
        !            77: #define        PDT_SIZE                4096    /* size of a page directory table */
        !            78: #define        PT_SIZE                 4096    /* size of a page table */
        !            79:
        !            80: #define        NBR_PDE                 (PDT_SIZE / 8)
        !            81: #define        NBR_PTE                 (PT_SIZE / 4)
        !            82:
        !            83: #define        NBSEG                   (1 << PDT_INDEX_SHIFT)
        !            84:
        !            85: #if !defined(_LOCORE)
        !            86:
        !            87: typedef        u_int32_t       pt_entry_t;
        !            88:
        !            89: typedef struct {
        !            90:        u_int32_t       pde_pa;
        !            91:        pt_entry_t*     pde_va;
        !            92: } pd_entry_t;
        !            93:
        !            94: #endif