1 /* $NetBSD: mips1_pte.h,v 1.17 2007/10/17 19:55:37 garbled Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department and Ralph Campbell. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah Hdr: pte.h 1.11 89/09/03 36 * 37 * @(#)pte.h 8.1 (Berkeley) 6/10/93 38 */ 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department and Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah Hdr: pte.h 1.11 89/09/03 75 * 76 * @(#)pte.h 8.1 (Berkeley) 6/10/93 77 */ 78 79 /* 80 * R2000 hardware page table entry 81 */ 82 83 #ifndef _LOCORE 84 struct mips1_pte { 85 #if BYTE_ORDER == BIG_ENDIAN 86 unsigned int pg_pfnum:20, /* HW: core page frame number or 0 */ 87 pg_n:1, /* HW: non-cacheable bit */ 88 pg_m:1, /* HW: dirty bit */ 89 pg_v:1, /* HW: valid bit */ 90 pg_g:1, /* HW: ignore pid bit */ 91 :4, 92 pg_swapm:1, /* SW: page must be forced to swap */ 93 pg_fod:1, /* SW: is fill on demand (=0) */ 94 pg_prot:2; /* SW: access control */ 95 #endif 96 #if BYTE_ORDER == LITTLE_ENDIAN 97 unsigned int pg_prot:2, /* SW: access control */ 98 pg_fod:1, /* SW: is fill on demand (=0) */ 99 pg_swapm:1, /* SW: page must be forced to swap */ 100 :4, 101 pg_g:1, /* HW: ignore pid bit */ 102 pg_v:1, /* HW: valid bit */ 103 pg_m:1, /* HW: dirty bit */ 104 pg_n:1, /* HW: non-cacheable bit */ 105 pg_pfnum:20; /* HW: core page frame number or 0 */ 106 #endif 107 }; 108 #endif /* _LOCORE */ 109 110 #define MIPS1_PG_PROT 0x00000003 111 #define MIPS1_PG_RW 0x00000000 112 #define MIPS1_PG_RO 0x00000001 113 #define MIPS1_PG_WIRED 0x00000002 114 #define MIPS1_PG_G 0x00000100 115 #define MIPS1_PG_V 0x00000200 116 #define MIPS1_PG_NV 0x00000000 117 #define MIPS1_PG_D 0x00000400 118 #define MIPS1_PG_N 0x00000800 119 #define MIPS1_PG_FRAME 0xfffff000 120 #define MIPS1_PG_SHIFT 12 121 #define MIPS1_PG_PFNUM(x) (((x) & MIPS1_PG_FRAME) >> MIPS1_PG_SHIFT) 122 123 #define MIPS1_PG_ROPAGE MIPS1_PG_V 124 #define MIPS1_PG_RWPAGE MIPS1_PG_D 125 #define MIPS1_PG_CWPAGE 0 126 #define MIPS1_PG_RWNCPAGE (MIPS1_PG_D | MIPS1_PG_N) 127 #define MIPS1_PG_CWNCPAGE MIPS1_PG_N 128 #define MIPS1_PG_IOPAGE (MIPS1_PG_D | MIPS1_PG_N) 129 130 #define mips1_tlbpfn_to_paddr(x) ((x) & MIPS1_PG_FRAME) 131 #define mips1_paddr_to_tlbpfn(x) (x) 132 133 #define MIPS1_PTE_TO_PADDR(pte) ((unsigned)(pte) & MIPS1_PG_FRAME) 134 #define MIPS1_PAGE_IS_RDONLY(pte,va) ((int)(pte) & MIPS1_PG_RO) 135