pte.h revision 1.14
1 /* $NetBSD: pte.h,v 1.14 2000/05/27 21:17:06 ragge 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_u:1; /* Uniform bit, does WHAT?? XXX */ 43 unsigned int pg_w:1; /* Wired bit */ 44 unsigned int pg_sref:1; /* Help for ref simulation */ 45 unsigned int pg_ref:1; /* Simulated reference bit */ 46 unsigned int pg_z:1; /* Zero DIGITAL = 0 */ 47 unsigned int pg_m:1; /* Modify DIGITAL */ 48 unsigned int pg_prot:4; /* reserved at zero */ 49 unsigned int pg_v:1; /* valid bit */ 50 }; 51 52 53 typedef struct pte pt_entry_t; /* Mach page table entry */ 54 55 #endif _LOCORE 56 57 #define PT_ENTRY_NULL ((pt_entry_t *) 0) 58 59 #define PG_V 0x80000000 60 #define PG_NV 0x00000000 61 #define PG_PROT 0x78000000 62 #define PG_RW 0x20000000 63 #define PG_KW 0x10000000 64 #define PG_KR 0x18000000 65 #define PG_URKW 0x70000000 66 #define PG_RO 0x78000000 67 #define PG_NONE 0x00000000 68 #define PG_M 0x04000000 69 #define PG_REF 0x01000000 70 #define PG_SREF 0x00800000 71 #define PG_W 0x00400000 72 #define PG_U 0x00200000 73 #define PG_FRAME 0x001fffff 74 #define PG_PFNUM(x) (((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT) 75 76 #ifndef _LOCORE 77 extern pt_entry_t *Sysmap; 78 /* 79 * Kernel virtual address to page table entry and to physical address. 80 */ 81 #endif 82 83 #ifdef __GNUC__ 84 #define kvtopte(va) ({ \ 85 struct pte *r; \ 86 asm("extzv $9,$21,%1,%0;moval *_Sysmap[%0],%0" : "=r"(r) : "g"(va)); \ 87 r; \ 88 }) 89 #define kvtophys(va) ({ \ 90 long r; \ 91 asm("extzv $9,$21,%1,%0;ashl $9,*_Sysmap[%0],%0;insv %1,$0,$9,%0" \ 92 : "&=r"(r) : "g"(va) : "cc"); \ 93 r; \ 94 }) 95 #else /* __GNUC__ */ 96 #define kvtophys(va) \ 97 (((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((int)(va) & VAX_PGOFSET)) 98 #define kvtopte(va) (&Sysmap[PG_PFNUM(va)]) 99 #endif /* __GNUC__ */ 100 #define uvtopte(va, pcb) \ 101 (((unsigned)va < 0x40000000) ? \ 102 &((pcb->P0BR)[PG_PFNUM(va)]) : \ 103 &((pcb->P1BR)[PG_PFNUM(va)])) 104 105 #endif 106
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