1 /* $NetBSD: pte.h,v 1.3 1994/11/25 19:08:59 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 /* All bugs are subject to removal without further notice */ 34 35 36 #include "vax/include/param.h" 37 38 #ifndef ASSEMBLER 39 40 /* 41 * VAX page table entries 42 */ 43 44 struct pte { 45 unsigned int pg_pfn:21; /* Page Frame Number or 0 */ 46 unsigned int pg_u:1; /* Uniform bit, does WHAT?? XXX */ 47 unsigned int pg_w:1; /* Wired bit */ 48 unsigned int pg_sref:1; /* Help for ref simulation */ 49 unsigned int pg_ref:1; /* Simulated reference bit */ 50 unsigned int pg_z:1; /* Zero DIGITAL = 0 */ 51 unsigned int pg_m:1; /* Modify DIGITAL */ 52 unsigned int pg_prot:4; /* reserved at zero */ 53 unsigned int pg_v:1; /* valid bit */ 54 }; 55 56 57 typedef struct pte pt_entry_t; /* Mach page table entry */ 58 59 #endif ASSEMBLER 60 61 #define PT_ENTRY_NULL ((pt_entry_t *) 0) 62 63 #define PG_V 0x80000000 64 #define PG_NV 0x00000000 65 #define PG_PROT 0x78000000 66 #define PG_RW 0x20000000 67 #define PG_KW 0x10000000 68 #define PG_RO 0x78000000 69 #define PG_NONE 0x00000000 70 #define PG_M 0x04000000 71 #define PG_REF 0x01000000 72 #define PG_SREF 0x00800000 73 #define PG_W 0x00400000 74 #define PG_U 0x00200000 75 #define PG_FRAME 0x001fffff 76 #define PG_SHIFT 9 77 #define PG_PFNUM(x) ((x) >> PG_SHIFT) 78 79 80 #define VAX_MAX_KPTSIZE VM_KERNEL_PT_PAGES 81 82 #ifndef ASSEMBLER 83 extern struct pte *Sysmap; 84 /* 85 * Kernel virtual address to page table entry and to physical address. 86 */ 87 #endif 88 89 #define kvtopte(va) \ 90 (&Sysmap[((unsigned)(va) - KERNBASE) >> PGSHIFT]) 91 #define ptetokv(pt) \ 92 ((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + 0x80000000) 93 #define kvtophys(va) \ 94 ((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET)) 95