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 #define ATTR_DEFAULT (ATTR_AF | ATTR_SH(ATTR_SH_IS)) 67 68 #define ATTR_DESCR_MASK 3 69 70 /* Level 0 table, 512GiB per entry */ 71 #define L0_SHIFT 39 72 #define L0_SIZE (1ul << L0_SHIFT) 73 #define L0_OFFSET (L0_SIZE - 1ul) 74 #define L0_INVAL 0x0 /* An invalid address */ 75 /* 0x1 Level 0 doesn't support block translation */ 76 /* 0x2 also marks an invalid address */ 77 #define L0_TABLE 0x3 /* A next-level table */ 78 79 /* Level 1 table, 1GiB per entry */ 80 #define L1_SHIFT 30 81 #define L1_SIZE (1 << L1_SHIFT) 82 #define L1_OFFSET (L1_SIZE - 1) 83 #define L1_INVAL L0_INVAL 84 #define L1_BLOCK 0x1 85 #define L1_TABLE L0_TABLE 86 87 /* Level 2 table, 2MiB per entry */ 88 #define L2_SHIFT 21 89 #define L2_SIZE (1 << L2_SHIFT) 90 #define L2_OFFSET (L2_SIZE - 1) 91 #define L2_INVAL L1_INVAL 92 #define L2_BLOCK L1_BLOCK 93 #define L2_TABLE L1_TABLE 94 95 #define L2_BLOCK_MASK UINT64_C(0xffffffe00000) 96 97 /* Level 3 table, 4KiB per entry */ 98 #define L3_SHIFT 12 99 #define L3_SIZE (1 << L3_SHIFT) 100 #define L3_OFFSET (L3_SIZE - 1) 101 #define L3_SHIFT 12 102 #define L3_INVAL 0x0 103 /* 0x1 is reserved */ 104 /* 0x2 also marks an invalid address */ 105 #define L3_PAGE 0x3 106 107 #define L0_ENTRIES_SHIFT 9 108 #define L0_ENTRIES (1 << L0_ENTRIES_SHIFT) 109 #define L0_ADDR_MASK (L0_ENTRIES - 1) 110 111 #define Ln_ENTRIES_SHIFT 9 112 #define Ln_ENTRIES (1 << Ln_ENTRIES_SHIFT) 113 #define Ln_ADDR_MASK (Ln_ENTRIES - 1) 114 #define Ln_TABLE_MASK ((1 << 12) - 1) 115 116 #endif /* !_MACHINE_PTE_H_ */ 117 118 /* End of pte.h */ 119