1 files changed, 64 insertions, 0 deletions
diff --git a/src/exception.rs b/src/exception.rs
new file mode 100644
index 0000000..301b84c
--- /dev/null
+++ b/src/exception.rs
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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,
+		};
+	}
+}