sys/arch/vax/include/pte.h

   1 /*      $NetBSD: pte.h,v 1.22 2008/08/29 18:25:02 matt Exp $      */
   2
   3 /*
   4  * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *     This product includes software developed at Ludd, University of Lule}.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef _VAX_PTE_H_
  34 #define _VAX_PTE_H_
  35
  36 #ifndef _LOCORE
  37 /*
  38  * VAX page table entries
  39  */
  40 struct pte {
  41         unsigned int    pg_pfn:21;      /* Page Frame Number or 0 */
  42         unsigned int    pg_illegal:2;   /* Don't use this bits */
  43         unsigned int    pg_sref:1;      /* Help for ref simulation */
  44         unsigned int    pg_w:1;         /* Wired bit */
  45         unsigned int    pg_z:1;         /* Zero DIGITAL = 0 */
  46         unsigned int    pg_m:1;         /* Modify DIGITAL */
  47         unsigned int    pg_prot:4;      /* reserved at zero */
  48         unsigned int    pg_v:1;         /* valid bit */
  49 };
  50
  51
  52 typedef struct pte      pt_entry_t;     /* Mach page table entry */
  53
  54 #endif /* _LOCORE */
  55
  56 #define PG_V            0x80000000
  57 #define PG_NV           0x00000000
  58 #define PG_PROT         0x78000000
  59 #define PG_RW           0x20000000
  60 #define PG_KW           0x10000000
  61 #define PG_KR           0x18000000
  62 #define PG_URKW         0x70000000
  63 #define PG_RO           0x78000000
  64 #define PG_NONE         0x00000000
  65 #define PG_M            0x04000000
  66 #define PG_W            0x01000000
  67 #define PG_SREF         0x00800000
  68 #define PG_ILLEGAL      0x00600000
  69 #define PG_FRAME        0x001fffff
  70 #define PG_PFNUM(x)     (((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT)
  71
  72 #ifndef _LOCORE
  73 extern pt_entry_t *Sysmap;
  74 /*
  75  * Kernel virtual address to page table entry and to physical address.
  76  */
  77 #endif
  78
  79 #ifdef __GNUC__
  80 #define kvtopte(va)     kvtopte0((vaddr_t) (va))
  81 static inline struct pte *
  82 kvtopte0(vaddr_t va)
  83 {
  84         struct pte *pt;
  85 #ifdef _RUMPKERNEL
  86         __asm(
  87                 "extzv $9,$21,%1,%0\n\t"
  88                 "moval %2[%0],%0\n\t"
  89              : "=r"(pt)
  90              : "g"(va), "o"(*Sysmap));
  91 #else
  92         __asm(
  93                 "extzv $9,$21,%1,%0\n\t"
  94                 "moval *Sysmap[%0],%0\n\t"
  95              : "=r"(pt)
  96              : "g"(va));
  97 #endif
  98         return pt;
  99 }
 100
 101 #define kvtophys(va)    kvtophys0((vaddr_t) (va))
 102 static inline paddr_t
 103 kvtophys0(vaddr_t va)
 104 {
 105         paddr_t pa;
 106 #ifdef _RUMPKERNEL
 107         __asm(
 108                 "extzv $9,$21,%1,%0\n\t"
 109                 "ashl $9,%2[%0],%0\n\t"
 110                 "insv %1,$0,$9,%0\n\t"
 111             : "=&r"(pa)
 112             : "g"(va), "o"(*Sysmap) : "cc");
 113 #else
 114         __asm(
 115                 "extzv $9,$21,%1,%0\n\t"
 116                 "ashl $9,*Sysmap[%0],%0\n\t"
 117                 "insv %1,$0,$9,%0\n\t"
 118             : "=&r"(pa)
 119             : "g"(va) : "cc");
 120 #endif
 121         return pa;
 122 }
 123 #else /* __GNUC__ */
 124 #define kvtophys(va) \
 125         (((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((paddr_t)(va) & VAX_PGOFSET))
 126 #define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
 127 #endif /* __GNUC__ */
 128 #define uvtopte(va, pcb) \
 129         (((vaddr_t)va < 0x40000000) ? \
 130         &(((pcb)->P0BR)[PG_PFNUM(va)]) : \
 131         &(((pcb)->P1BR)[PG_PFNUM(va)]))
 132
 133 #endif