arm_vgic 0.4.2

ARM Virtual Generic Interrupt Controller (VGIC) implementation.
Documentation 
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

// Copyright 2025 The Axvisor Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![allow(unused)]

use log::debug;

use crate::consts::{PPI_ID_MAX, SGI_ID_MAX, SPI_ID_MAX};

/// Interrupt trigger mode.
#[derive(Debug, Clone, Copy)]
pub enum TriggerMode {
    Edge  = 0,
    Level = 1,
}

#[allow(clippy::upper_case_acronyms)]
/// Different types of interrupt that the GIC handles.
#[derive(Debug, Clone, Copy)]
pub enum InterruptType {
    SGI,
    PPI,
    SPI,
}

#[derive(Debug, Clone, Copy)]
pub enum InterruptStatus {
    Inactive,
    Pending,
    Active,
    ActivePending,
}

#[derive(Copy, Clone)]
pub struct Interrupt {
    interrupt_id: u32,
    vcpu_id: u32,
    priority: u32,
    status: InterruptStatus,
    enable: bool,
    trigger_mode: TriggerMode,
    interrupt_type: InterruptType,
}

impl Interrupt {
    fn new(interrupt_id: u32, vcpu_id: u32) -> Self {
        Interrupt {
            interrupt_id,
            vcpu_id,
            priority: 0,
            status: InterruptStatus::Inactive,
            enable: false,
            trigger_mode: TriggerMode::Edge,
            interrupt_type: InterruptType::SGI,
        }
    }
}

#[derive(Copy, Clone)]
pub struct VgicInt {
    inner: Interrupt,
}

impl VgicInt {
    pub(crate) fn new(interrupt_id: u32, vcpu_id: u32) -> Self {
        let interrupt_type = if interrupt_id < SGI_ID_MAX as u32 {
            InterruptType::SGI
        } else if interrupt_id < PPI_ID_MAX as u32 {
            InterruptType::PPI
        } else if interrupt_id < SPI_ID_MAX as u32 {
            InterruptType::SPI
        } else {
            panic!("Invalid interrupt id");
        };
        Self {
            inner: Interrupt::new(interrupt_id, vcpu_id),
        }
    }

    pub(crate) fn set_enable(&mut self, enable: bool) {
        self.inner.enable = enable;
        debug!(
            "Setting interrupt {} enable to {}",
            self.inner.interrupt_id, enable
        );
        // if !gicd.get_enable()
        // gicd.set_enable(self.interrupt_id, enable);
    }

    pub(crate) fn get_enable(&self) -> bool {
        self.inner.enable
    }

    pub(crate) fn set_priority(&mut self, priority: u32) {
        self.inner.priority = priority;
        // gicd.set_priority(self.interrupt_id, priority);
    }

    pub(crate) fn get_priority(&self) -> u32 {
        self.inner.priority
    }

    pub(crate) fn set_vcpu_id(&mut self, vcpu_id: u32) {
        self.inner.vcpu_id = vcpu_id;
    }

    pub(crate) fn get_vcpu_id(&self) -> u32 {
        self.inner.vcpu_id
    }

    pub(crate) fn set_status(&mut self, status: InterruptStatus) {
        self.inner.status = status;
    }

    pub(crate) fn get_status(&self) -> InterruptStatus {
        self.inner.status
    }

    pub(crate) fn set_trigger_mode(&mut self, trigger_mode: TriggerMode) {
        self.inner.trigger_mode = trigger_mode;
    }

    pub(crate) fn get_trigger_mode(&self) -> &TriggerMode {
        &self.inner.trigger_mode
    }

    pub(crate) fn get_interrupt_type(&self) -> &InterruptType {
        &self.inner.interrupt_type
    }
}