1 /* $NetBSD: pte.h,v 1.23 2009/08/10 08:05:32 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 134