1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
// SPDX-License-Identifier: Apache-2.0 OR MIT
//
// Copyright (c) 2018-2022 by the author(s)
//
// Author(s):
// - Ali Saidi <alisaidi@amazon.com>
//! AArch64 Memory Model Feature Register 1 - EL1
//!
//! Provides information about the implemented memory model and memory
//! management support in AArch64 state.
use tock_registers::{interfaces::Readable, register_bitfields};
register_bitfields! {u64,
pub ID_AA64MMFR1_EL1 [
/// Support for configurable trapping delay of WFE instructions
TWED OFFSET(32) NUMBITS(4) [
/// Delaying the trapping of WFE instructions isn't supported
Unsupported = 0b0000,
/// Delaying the trapping of WFE instructions is supported
Supported = 0xb0001,
],
/// Execute-never control at stage2 is distinct for EL0 and EL1
XNX OFFSET(28) NUMBITS(4) [
/// There are not distinct stage2 execute never controls for EL1 and EL0
Unsupported = 0b0000,
/// There are distinct stage2 execute never controls for EL1 and EL0
Supported = 0xb0001,
],
/// Speculative reads can generate SError Interrupts
SpecSEI OFFSET(24) NUMBITS(4) [
/// PE never generates SError interrupts on a speculative read
Never = 0b0000,
/// PE may generate SError interrupts on a speculative read
Maybe = 0b0001
],
/// Privileged Access Never support
PAN OFFSET(20) NUMBITS(4) [
/// Privileged Access Never isn't supported
Unsupported = 0b0000,
/// Privileged Access Never is supported
Supported = 0xb0001,
/// Privileged Access Never is supported along with AT instruction support
SupportedAT = 0xb0010,
/// Enhanced Privileged Access Never is supported
SupportedEPAN = 0xb0011,
],
/// Limited Ordered regions support
LO OFFSET(16) NUMBITS(4) [
/// Limited Ordered regions aren't supported
Unsupported = 0b0000,
/// Limited Ordered regions are supported
Supported = 0xb0001,
],
/// Hierarchical Permission can be disabled in TCRs
HPDS OFFSET(12) NUMBITS(4) [
/// HPDS aren't supported
Unsupported = 0b0000,
/// HPDS are supported
Supported = 0xb0001,
],
/// Virtualization Host Extensions
VH OFFSET(8) NUMBITS(4) [
/// Virtualization Host Extensions aren't supported
Unsupported = 0b0000,
/// Virtualization Host Extensions are supported
Supported = 0xb0001,
],
/// Number of VMID bits that are supported
VMIDBits OFFSET(4) NUMBITS(4) [
/// 8 bits of VMID are supported
Bits8 = 0b0000,
/// 16 bits of VMID are supported
Bits16 = 0b0010,
],
/// Hardware updates to Access and Dirty flags in translation tables
HAFDBS OFFSET(0) NUMBITS(4) [
/// Not supported
Unsupported = 0b0000,
/// Access flag is supported
AccessOnly = 0xb0001,
/// Access and dirty flags are supported
AccessDirty = 0b0010,
],
]
}
pub struct Reg;
impl Readable for Reg {
type T = u64;
type R = ID_AA64MMFR1_EL1::Register;
sys_coproc_read_raw!(u64, "ID_AA64MMFR1_EL1", "x");
}
pub const ID_AA64MMFR1_EL1: Reg = Reg;