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/*
Copyright 2021-2023 Gabriel Jensen.
This file is part of Luma.
Luma is free software: you can redistribute it
and/or modify it under the terms of the GNU
Affero General Public License as published by
the Free Software Foundation, either version 3
of the License, or (at your option) any later
version.
Luma is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU
Affero General Public License along with Luma.
If not, see <https://www.gnu.org/licenses/>.
*/
use crate::cpu_mode::CpuMode;
#[repr(u8)]
#[derive(Clone, Copy)]
pub enum Exception {
Reset,
UndefinedInstruction,
SoftwareInterrupt,
PrefetchAbort,
DataAbort,
InterruptRequest,
FastInterruptRequest,
}
impl Exception {
pub fn mode(self) -> CpuMode {
return match self {
Self::Reset => CpuMode::Supervisor,
Self::UndefinedInstruction => CpuMode::Undefined,
Self::SoftwareInterrupt => CpuMode::Supervisor,
Self::PrefetchAbort => CpuMode::Abort,
Self::DataAbort => CpuMode::Abort,
Self::InterruptRequest => CpuMode::InterruptRequest,
Self::FastInterruptRequest => CpuMode::FastInterruptRequest,
};
}
pub fn vector_address(self) -> u32 {
use Exception::*;
return match self {
Reset => 0x00000000,
UndefinedInstruction => 0x00000004,
SoftwareInterrupt => 0x00000008,
PrefetchAbort => 0x0000000C,
DataAbort => 0x00000010,
InterruptRequest => 0x00000018,
FastInterruptRequest => 0x0000001C,
};
}
}
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