/* $NetBSD: pte.h,v 1.1.1.1 1995/07/25 23:12:17 chuck Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: Utah $Hdr: pte.h 1.13 92/01/20$ * * @(#)pte.h 8.1 (Berkeley) 6/10/93 */ #ifndef _MACHINE_PTE_H_ #define _MACHINE_PTE_H_ /* * m68k hardware segment/page table entries */ #if 0 struct ste { unsigned int sg_pfnum:20; /* page table frame number */ unsigned int :8; /* reserved at 0 */ unsigned int :1; /* reserved at 1 */ unsigned int sg_prot:1; /* write protect bit */ unsigned int sg_v:2; /* valid bits */ }; struct ste40 { unsigned int sg_ptaddr:24; /* page table page addr */ unsigned int :4; /* reserved at 0 */ unsigned int sg_u; /* hardware modified (dirty) bit */ unsigned int sg_prot:1; /* write protect bit */ unsigned int sg_v:2; /* valid bits */ }; struct pte { unsigned int pg_pfnum:20; /* page frame number or 0 */ unsigned int :3; unsigned int pg_w:1; /* is wired */ unsigned int :1; /* reserved at zero */ unsigned int pg_ci:1; /* cache inhibit bit */ unsigned int :1; /* reserved at zero */ unsigned int pg_m:1; /* hardware modified (dirty) bit */ unsigned int pg_u:1; /* hardware used (reference) bit */ unsigned int pg_prot:1; /* write protect bit */ unsigned int pg_v:2; /* valid bit */ }; #endif typedef int st_entry_t; /* segment table entry */ typedef int pt_entry_t; /* Mach page table entry */ #define PT_ENTRY_NULL ((pt_entry_t *) 0) #define ST_ENTRY_NULL ((st_entry_t *) 0) #define SG_V 0x00000002 /* segment is valid */ #define SG_NV 0x00000000 #define SG_PROT 0x00000004 /* access protection mask */ #define SG_RO 0x00000004 #define SG_RW 0x00000000 #define SG_U 0x00000008 /* modified bit (68040) */ #define SG_FRAME 0xfffff000 #define SG_IMASK 0xffc00000 #define SG_ISHIFT 22 #define SG_PMASK 0x003ff000 #define SG_PSHIFT 12 /* 68040 additions */ #define SG4_MASK1 0xfe000000 #define SG4_SHIFT1 25 #define SG4_MASK2 0x01fc0000 #define SG4_SHIFT2 18 #define SG4_MASK3 0x0003f000 #define SG4_SHIFT3 12 #define SG4_ADDR1 0xfffffe00 #define SG4_ADDR2 0xffffff00 #define SG4_LEV1SIZE 128 #define SG4_LEV2SIZE 128 #define SG4_LEV3SIZE 64 #define PG_V 0x00000001 #define PG_NV 0x00000000 #define PG_PROT 0x00000004 #define PG_U 0x00000008 #define PG_M 0x00000010 #define PG_W 0x00000100 #define PG_RO 0x00000004 #define PG_RW 0x00000000 #define PG_FRAME 0xfffff000 #define PG_CI 0x00000040 #define PG_SHIFT 12 #define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT) /* 68040 additions */ #define PG_CMASK 0x00000060 /* cache mode mask */ #define PG_CWT 0x00000000 /* writethrough caching */ #define PG_CCB 0x00000020 /* copyback caching */ #define PG_CIS 0x00000040 /* cache inhibited serialized */ #define PG_CIN 0x00000060 /* cache inhibited nonserialized */ #define PG_SO 0x00000080 /* supervisor only */ #define HP_STSIZE (MAXUL2SIZE*SG4_LEV2SIZE*sizeof(st_entry_t)) /* user process segment table size */ #define HP_MAX_PTSIZE 0x400000 /* max size of UPT */ #define HP_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */ #define HP_PTBASE 0x10000000 /* UPT map base address */ #define HP_PTMAXSIZE 0x70000000 /* UPT map maximum size */ /* * Kernel virtual address to page table entry and to physical address. */ #define kvtopte(va) \ (&Sysmap[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT]) #define ptetokv(pt) \ ((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS) #define kvtophys(va) \ ((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET)) #endif /* !_MACHINE_PTE_H_ */