1 /*- 2 * Copyright (c) 2014 Andrew Turner 3 * Copyright (c) 2014-2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Andrew Turner under 7 * sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _MACHINE_PTE_H_ 34 #define _MACHINE_PTE_H_ 35 36 #ifndef LOCORE 37 typedef uint64_t pd_entry_t; /* page directory entry */ 38 typedef uint64_t pt_entry_t; /* page table entry */ 39 #endif 40 41 /* Block and Page attributes */ 42 /* TODO: Add the upper attributes */ 43 #define ATTR_MASK_H UINT64_C(0xfff0000000000000) 44 #define ATTR_MASK_L UINT64_C(0x0000000000000fff) 45 #define ATTR_MASK (ATTR_MASK_H | ATTR_MASK_L) 46 /* Bits 58:55 are reserved for software */ 47 #define ATTR_SW_MANAGED (1UL << 56) 48 #define ATTR_SW_WIRED (1UL << 55) 49 #define ATTR_nG (1 << 11) 50 #define ATTR_AF (1 << 10) 51 #define ATTR_SH(x) ((x) << 8) 52 #define ATTR_SH_MASK ATTR_SH(3) 53 #define ATTR_SH_NS 0 /* Non-shareable */ 54 #define ATTR_SH_OS 2 /* Outer-shareable */ 55 #define ATTR_SH_IS 3 /* Inner-shareable */ 56 #define ATTR_AP_RW_BIT (1 << 7) 57 #define ATTR_AP(x) ((x) << 6) 58 #define ATTR_AP_MASK ATTR_AP(3) 59 #define ATTR_AP_RW (0 << 1) 60 #define ATTR_AP_RO (1 << 1) 61 #define ATTR_AP_USER (1 << 0) 62 #define ATTR_NS (1 << 5) 63 #define ATTR_IDX(x) ((x) << 2) 64 #define ATTR_IDX_MASK (7 << 2) 65 66 #ifdef SMP 67 #define ATTR_DEFAULT (ATTR_AF | ATTR_SH(ATTR_SH_IS)) 68 #else 69 #define ATTR_DEFAULT (ATTR_AF) 70 #endif 71 72 #define ATTR_DESCR_MASK 3 73 74 /* Level 0 table, 512GiB per entry */ 75 #define L0_SHIFT 39 76 #define L0_INVAL 0x0 /* An invalid address */ 77 #define L0_BLOCK 0x1 /* A block */ 78 /* 0x2 also marks an invalid address */ 79 #define L0_TABLE 0x3 /* A next-level table */ 80 81 /* Level 1 table, 1GiB per entry */ 82 #define L1_SHIFT 30 83 #define L1_SIZE (1 << L1_SHIFT) 84 #define L1_OFFSET (L1_SIZE - 1) 85 #define L1_INVAL L0_INVAL 86 #define L1_BLOCK L0_BLOCK 87 #define L1_TABLE L0_TABLE 88 89 /* Level 2 table, 2MiB per entry */ 90 #define L2_SHIFT 21 91 #define L2_SIZE (1 << L2_SHIFT) 92 #define L2_OFFSET (L2_SIZE - 1) 93 #define L2_INVAL L0_INVAL 94 #define L2_BLOCK L0_BLOCK 95 #define L2_TABLE L0_TABLE 96 97 #define L2_BLOCK_MASK UINT64_C(0xffffffe00000) 98 99 /* Level 3 table, 4KiB per entry */ 100 #define L3_SHIFT 12 101 #define L3_SIZE (1 << L3_SHIFT) 102 #define L3_OFFSET (L3_SIZE - 1) 103 #define L3_SHIFT 12 104 #define L3_INVAL 0x0 105 /* 0x1 is reserved */ 106 /* 0x2 also marks an invalid address */ 107 #define L3_PAGE 0x3 108 109 #define Ln_ENTRIES (1 << 9) 110 #define Ln_ADDR_MASK (Ln_ENTRIES - 1) 111 #define Ln_TABLE_MASK ((1 << 12) - 1) 112 113 #endif /* !_MACHINE_PTE_H_ */ 114 115 /* End of pte.h */ 116