/* $NetBSD: mips1_pte.h,v 1.21 2020/07/26 08:08:41 simonb Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1992, 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 and Ralph Campbell. * * 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. 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 1.11 89/09/03 * * @(#)pte.h 8.1 (Berkeley) 6/10/93 */ #ifndef _MIPS_MIPS1_PTE_H_ #define _MIPS_MIPS1_PTE_H_ /* * R2000 hardware page table entry */ #ifndef _LOCORE #if 0 struct mips1_pte { #if BYTE_ORDER == BIG_ENDIAN unsigned int pg_pfnum:20, /* HW: core page frame number or 0 */ pg_n:1, /* HW: non-cacheable bit */ pg_m:1, /* HW: dirty bit */ pg_v:1, /* HW: valid bit */ pg_g:1, /* HW: ignore pid bit */ :4, pg_swapm:1, /* SW: page must be forced to swap */ pg_fod:1, /* SW: is fill on demand (=0) */ pg_prot:2; /* SW: access control */ #endif #if BYTE_ORDER == LITTLE_ENDIAN unsigned int pg_prot:2, /* SW: access control */ pg_fod:1, /* SW: is fill on demand (=0) */ pg_swapm:1, /* SW: page must be forced to swap */ :4, pg_g:1, /* HW: ignore pid bit */ pg_v:1, /* HW: valid bit */ pg_m:1, /* HW: dirty bit */ pg_n:1, /* HW: non-cacheable bit */ pg_pfnum:20; /* HW: core page frame number or 0 */ #endif }; #endif #endif /* _LOCORE */ #define MIPS1_PG_PROT 0x00000003 #define MIPS1_PG_RW 0x00000000 #define MIPS1_PG_RO 0x00000001 #define MIPS1_PG_WIRED 0x00000002 #define MIPS1_PG_G 0x00000100 #define MIPS1_PG_V 0x00000200 #define MIPS1_PG_NV 0x00000000 #define MIPS1_PG_D 0x00000400 #define MIPS1_PG_N 0x00000800 #define MIPS1_PG_FRAME 0xfffff000 #define MIPS1_PG_SHIFT 12 #define MIPS1_PG_PFNUM(x) (((x) & MIPS1_PG_FRAME) >> MIPS1_PG_SHIFT) #define MIPS1_PG_ROPAGE MIPS1_PG_V #define MIPS1_PG_RWPAGE MIPS1_PG_D #define MIPS1_PG_CWPAGE 0 #define MIPS1_PG_RWNCPAGE (MIPS1_PG_D | MIPS1_PG_N) #define MIPS1_PG_CWNCPAGE MIPS1_PG_N #define MIPS1_PG_IOPAGE (MIPS1_PG_D | MIPS1_PG_N) #define mips1_tlbpfn_to_paddr(x) ((x) & MIPS1_PG_FRAME) #define mips1_paddr_to_tlbpfn(x) (x) #define MIPS1_PTE_TO_PADDR(pte) ((unsigned)(pte) & MIPS1_PG_FRAME) #define MIPS1_PAGE_IS_RDONLY(pte,va) ((int)(pte) & MIPS1_PG_RO) #endif /* !_MIPS_MIPS1_PTE_H_ */ |