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// Copyright (c) 2025 taitep
// SPDX-License-Identifier: BSD-2-Clause
//
// This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
// See LICENSE file in the project root for full license text.
use int_enum::IntEnum;
#[repr(u8)]
#[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq, Eq, IntEnum)]
pub enum ExceptionType {
InstructionAddressMisaligned = 0,
InstructionAccessFault = 1,
IllegalInstruction = 2,
Breakpoint = 3,
LoadAddressMisaligned = 4,
LoadAccessFault = 5,
StoreAmoAddressMisaligned = 6,
StoreAmoAccessFault = 7,
EnvironmentCallFromUMode = 8,
EnvironmentCallFromSMode = 9,
EnvironmentCallFromMMode = 11,
InstructionPageFault = 12,
LoadPageFault = 13,
StoreAmoPageFault = 15,
DoubleTrap = 16,
SoftwareCheck = 18,
HardwareError = 19,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MemoryExceptionType {
AddressMisaligned,
AccessFault,
PageFault,
}
impl MemoryExceptionType {
pub(crate) fn to_exception_store(&self) -> ExceptionType {
match self {
Self::AddressMisaligned => ExceptionType::StoreAmoAddressMisaligned,
Self::AccessFault => ExceptionType::StoreAmoAccessFault,
Self::PageFault => ExceptionType::StoreAmoPageFault,
}
}
pub(crate) fn to_exception_instr(&self) -> ExceptionType {
match self {
Self::AddressMisaligned => ExceptionType::InstructionAddressMisaligned,
Self::AccessFault => ExceptionType::InstructionAccessFault,
Self::PageFault => ExceptionType::InstructionPageFault,
}
}
pub(crate) fn to_exception_load(&self) -> ExceptionType {
match self {
Self::AddressMisaligned => ExceptionType::LoadAddressMisaligned,
Self::AccessFault => ExceptionType::LoadAccessFault,
Self::PageFault => ExceptionType::LoadPageFault,
}
}
}
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