acpi_spec/
aspt.rs

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1// Copyright (c) Microsoft Corporation.
2// Licensed under the MIT License.
3
4// ACPI definitions for the AMD Secure Processor Table (ASPT).
5//
6// Used to describe information about the AMD Platform Security Processor (PSP)
7// device.
8
9use super::Table;
10use zerocopy::Immutable;
11use zerocopy::IntoBytes;
12use zerocopy::KnownLayout;
13use zerocopy::Unaligned;
14
15#[repr(C, packed)]
16#[derive(Copy, Clone, Debug, IntoBytes, Immutable, KnownLayout, Unaligned)]
17pub struct Aspt {
18    pub num_structs: usize,
19    // variable number of trailing structs
20}
21
22impl Table for Aspt {
23    const SIGNATURE: [u8; 4] = *b"ASPT";
24}
25
26#[repr(C, packed)]
27#[derive(Copy, Clone, Debug, IntoBytes, Immutable, KnownLayout)]
28pub struct AsptStructHeader {
29    pub type_: structs::AsptStructType,
30    // length of the struct, including this header
31    pub len: u16,
32}
33
34impl AsptStructHeader {
35    pub fn new<S: structs::AsptStruct>() -> AsptStructHeader {
36        AsptStructHeader {
37            type_: S::TYPE,
38            len: size_of::<S>() as u16,
39        }
40    }
41}
42
43/// Each of these structs is prepended by a `AsptStructHeader`
44pub mod structs {
45    use open_enum::open_enum;
46    use zerocopy::FromBytes;
47    use zerocopy::Immutable;
48    use zerocopy::IntoBytes;
49    use zerocopy::KnownLayout;
50
51    open_enum! {
52        #[derive(IntoBytes, Immutable, KnownLayout, FromBytes)]
53        pub enum AsptStructType: u16 {
54            ASP_GLOBAL_REGISTERS = 0,
55            SEV_MAILBOX_REGISTERS = 1,
56            ACPI_MAILBOX_REGISTERS = 2,
57        }
58    }
59
60    pub trait AsptStruct: IntoBytes + Immutable + KnownLayout {
61        const TYPE: AsptStructType;
62    }
63
64    #[repr(C, packed)]
65    #[derive(Copy, Clone, Debug, IntoBytes, Immutable, KnownLayout)]
66    pub struct AspGlobalRegisters {
67        pub _reserved: u32,
68        pub feature_register_address: u64,
69        pub interrupt_enable_register_address: u64,
70        pub interrupt_status_register_address: u64,
71    }
72
73    impl AsptStruct for AspGlobalRegisters {
74        const TYPE: AsptStructType = AsptStructType::ASP_GLOBAL_REGISTERS;
75    }
76
77    #[repr(C, packed)]
78    #[derive(Copy, Clone, Debug, IntoBytes, Immutable, KnownLayout)]
79    pub struct SevMailboxRegisters {
80        pub mailbox_interrupt_id: u8,
81        pub _reserved: [u8; 3],
82        pub cmd_resp_register_address: u64,
83        pub cmd_buf_addr_lo_register_address: u64,
84        pub cmd_buf_addr_hi_register_address: u64,
85    }
86
87    impl AsptStruct for SevMailboxRegisters {
88        const TYPE: AsptStructType = AsptStructType::SEV_MAILBOX_REGISTERS;
89    }
90
91    #[repr(C, packed)]
92    #[derive(Copy, Clone, Debug, IntoBytes, Immutable, KnownLayout)]
93    pub struct AcpiMailboxRegisters {
94        pub _reserved1: u32,
95        pub cmd_resp_register_address: u64,
96        pub _reserved2: [u64; 2],
97    }
98
99    impl AsptStruct for AcpiMailboxRegisters {
100        const TYPE: AsptStructType = AsptStructType::ACPI_MAILBOX_REGISTERS;
101    }
102}
acpi_spec/aspt.rs

acpi_spec/
aspt.rs
