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

1.1     ! nbrk        1: /*      $OpenBSD: pte.h,v 1.10 2006/07/25 21:05:31 miod Exp $      */
        !             2: /*     $NetBSD: pte.h,v 1.21 2005/12/24 22:45:40 perry Exp $     */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *     This product includes software developed at Ludd, University of Lule}.
        !            19:  * 4. The name of the author may not be used to endorse or promote products
        !            20:  *    derived from this software without specific prior written permission
        !            21:  *
        !            22:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            25:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            26:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            27:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            28:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            29:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            30:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            31:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            32:  */
        !            33:
        !            34: #ifndef _VAX_PTE_H_
        !            35: #define _VAX_PTE_H_
        !            36:
        !            37: #ifndef _LOCORE
        !            38:
        !            39: typedef u_int32_t      pt_entry_t;     /* Mach page table entry */
        !            40:
        !            41: #endif /* _LOCORE */
        !            42:
        !            43: #define        PT_ENTRY_NULL   ((pt_entry_t *) 0)
        !            44:
        !            45: #define        PG_V            0x80000000
        !            46: #define        PG_NV           0x00000000
        !            47: #define        PG_PROT         0x78000000
        !            48: #define        PG_RW           0x20000000
        !            49: #define        PG_KW           0x10000000
        !            50: #define        PG_KR           0x18000000
        !            51: #define        PG_URKW         0x70000000
        !            52: #define        PG_RO           0x78000000
        !            53: #define        PG_NONE         0x00000000
        !            54: #define        PG_M            0x04000000
        !            55: #define        PG_W            0x01000000
        !            56: #define        PG_SREF         0x00800000
        !            57: #define        PG_ILLEGAL      0x00600000
        !            58: #define        PG_FRAME        0x001fffff
        !            59: #define        PG_PFNUM(x)     (((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT)
        !            60:
        !            61: #ifndef _LOCORE
        !            62: extern pt_entry_t *Sysmap;
        !            63: /*
        !            64:  * Kernel virtual address to page table entry and to physical address.
        !            65:  */
        !            66: #endif
        !            67:
        !            68: #ifdef __ELF__
        !            69: #define VAX_SYSMAP     "Sysmap"
        !            70: #else
        !            71: #define VAX_SYSMAP     "_Sysmap"
        !            72: #endif
        !            73:
        !            74: #ifdef __GNUC__
        !            75: #define kvtopte(va) ({ \
        !            76:        pt_entry_t *r; \
        !            77:        __asm("extzv $9,$21,%1,%0;moval *" VAX_SYSMAP "[%0],%0" : "=r"(r) : "g"(va)); \
        !            78:        r; \
        !            79: })
        !            80: #define kvtophys(va) ({ \
        !            81:        paddr_t r; \
        !            82:        __asm("extzv $9,$21,%1,%0;ashl $9,*" VAX_SYSMAP "[%0],%0;insv %1,$0,$9,%0" \
        !            83:            : "=&r"(r) : "g"(va) : "cc"); \
        !            84:        r; \
        !            85: })
        !            86: #else /* __GNUC__ */
        !            87: #define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
        !            88: #define kvtophys(va) \
        !            89:        (((*kvtopte(va) & PG_FRAME) << VAX_PGSHIFT) | ((int)(va) & VAX_PGOFSET))
        !            90: #endif /* __GNUC__ */
        !            91: #define uvtopte(va, pcb) \
        !            92:        (((vaddr_t)(va) < 0x40000000) ? \
        !            93:        &(((pcb)->P0BR)[PG_PFNUM(va)]) : \
        !            94:        &(((pcb)->P1BR)[PG_PFNUM(va)]))
        !            95:
        !            96: #endif