2 * Copyright (c) 2014 Andrew Turner
3 * Copyright (c) 2014-2015 The FreeBSD Foundation
6 * This software was developed by Andrew Turner under
7 * sponsorship from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
33 #ifndef _MACHINE_PTE_H_
34 #define _MACHINE_PTE_H_
37 typedef uint64_t pd_entry_t; /* page directory entry */
38 typedef uint64_t pt_entry_t; /* page table entry */
41 /* Block and Page attributes */
42 #define ATTR_MASK_H UINT64_C(0xfffc000000000000)
43 #define ATTR_MASK_L UINT64_C(0x0000000000000fff)
44 #define ATTR_MASK (ATTR_MASK_H | ATTR_MASK_L)
45 /* Bits 58:55 are reserved for software */
46 #define ATTR_SW_UNUSED2 (1UL << 58)
47 #define ATTR_SW_UNUSED1 (1UL << 57)
48 #define ATTR_SW_MANAGED (1UL << 56)
49 #define ATTR_SW_WIRED (1UL << 55)
51 #define ATTR_S1_UXN (1UL << 54)
52 #define ATTR_S1_PXN (1UL << 53)
53 #define ATTR_S1_XN (ATTR_S1_PXN | ATTR_S1_UXN)
55 #define ATTR_S2_XN(x) ((x) << 53)
56 #define ATTR_S2_XN_MASK ATTR_S2_XN(3UL)
57 #define ATTR_S2_XN_NONE 0UL /* Allow execution at EL0 & EL1 */
58 #define ATTR_S2_XN_EL1 1UL /* Allow execution at EL0 */
59 #define ATTR_S2_XN_ALL 2UL /* No execution */
60 #define ATTR_S2_XN_EL0 3UL /* Allow execution at EL1 */
62 #define ATTR_CONTIGUOUS (1UL << 52)
63 #define ATTR_DBM (1UL << 51)
64 #define ATTR_S1_nG (1 << 11)
65 #define ATTR_AF (1 << 10)
66 #define ATTR_SH(x) ((x) << 8)
67 #define ATTR_SH_MASK ATTR_SH(3)
68 #define ATTR_SH_NS 0 /* Non-shareable */
69 #define ATTR_SH_OS 2 /* Outer-shareable */
70 #define ATTR_SH_IS 3 /* Inner-shareable */
72 #define ATTR_S1_AP_RW_BIT (1 << 7)
73 #define ATTR_S1_AP(x) ((x) << 6)
74 #define ATTR_S1_AP_MASK ATTR_S1_AP(3)
75 #define ATTR_S1_AP_RW (0 << 1)
76 #define ATTR_S1_AP_RO (1 << 1)
77 #define ATTR_S1_AP_USER (1 << 0)
78 #define ATTR_S1_NS (1 << 5)
79 #define ATTR_S1_IDX(x) ((x) << 2)
80 #define ATTR_S1_IDX_MASK (7 << 2)
82 #define ATTR_S2_S2AP(x) ((x) << 6)
83 #define ATTR_S2_S2AP_MASK 3
84 #define ATTR_S2_S2AP_READ 1
85 #define ATTR_S2_S2AP_WRITE 2
87 #define ATTR_S2_MEMATTR(x) ((x) << 2)
88 #define ATTR_S2_MEMATTR_MASK ATTR_S2_MEMATTR(0xf)
89 #define ATTR_S2_MEMATTR_DEVICE_nGnRnE 0x0
90 #define ATTR_S2_MEMATTR_NC 0xf
91 #define ATTR_S2_MEMATTR_WT 0xa
92 #define ATTR_S2_MEMATTR_WB 0xf
94 #define ATTR_DEFAULT (ATTR_AF | ATTR_SH(ATTR_SH_IS))
96 #define ATTR_DESCR_MASK 3
97 #define ATTR_DESCR_VALID 1
98 #define ATTR_DESCR_TYPE_MASK 2
99 #define ATTR_DESCR_TYPE_TABLE 2
100 #define ATTR_DESCR_TYPE_PAGE 2
101 #define ATTR_DESCR_TYPE_BLOCK 0
103 /* Level 0 table, 512GiB per entry */
105 #define L0_SIZE (1ul << L0_SHIFT)
106 #define L0_OFFSET (L0_SIZE - 1ul)
107 #define L0_INVAL 0x0 /* An invalid address */
108 /* 0x1 Level 0 doesn't support block translation */
109 /* 0x2 also marks an invalid address */
110 #define L0_TABLE 0x3 /* A next-level table */
112 /* Level 1 table, 1GiB per entry */
114 #define L1_SIZE (1 << L1_SHIFT)
115 #define L1_OFFSET (L1_SIZE - 1)
116 #define L1_INVAL L0_INVAL
118 #define L1_TABLE L0_TABLE
120 /* Level 2 table, 2MiB per entry */
122 #define L2_SIZE (1 << L2_SHIFT)
123 #define L2_OFFSET (L2_SIZE - 1)
124 #define L2_INVAL L1_INVAL
125 #define L2_BLOCK L1_BLOCK
126 #define L2_TABLE L1_TABLE
128 #define L2_BLOCK_MASK UINT64_C(0xffffffe00000)
130 /* Level 3 table, 4KiB per entry */
132 #define L3_SIZE (1 << L3_SHIFT)
133 #define L3_OFFSET (L3_SIZE - 1)
136 /* 0x1 is reserved */
137 /* 0x2 also marks an invalid address */
140 #define PMAP_MAPDEV_EARLY_SIZE (L2_SIZE * 8)
142 #define L0_ENTRIES_SHIFT 9
143 #define L0_ENTRIES (1 << L0_ENTRIES_SHIFT)
144 #define L0_ADDR_MASK (L0_ENTRIES - 1)
146 #define Ln_ENTRIES_SHIFT 9
147 #define Ln_ENTRIES (1 << Ln_ENTRIES_SHIFT)
148 #define Ln_ADDR_MASK (Ln_ENTRIES - 1)
149 #define Ln_TABLE_MASK ((1 << 12) - 1)
151 #define pmap_l0_index(va) (((va) >> L0_SHIFT) & L0_ADDR_MASK)
152 #define pmap_l1_index(va) (((va) >> L1_SHIFT) & Ln_ADDR_MASK)
153 #define pmap_l2_index(va) (((va) >> L2_SHIFT) & Ln_ADDR_MASK)
154 #define pmap_l3_index(va) (((va) >> L3_SHIFT) & Ln_ADDR_MASK)
156 #endif /* !_MACHINE_PTE_H_ */