From 528b519ce98c21049705526442cbde1672495b49 Mon Sep 17 00:00:00 2001
From: taitep <taitep@taitep.se>
Date: Fri, 26 Dec 2025 14:20:27 +0100
Subject: (BIG CHANGE) memory handling has changed, MMIO is now a 2 level page
 table, misaligned access supported, addresses not internally split to page
 and offset immediately, all load/store instructions implemented. Might still
 have bugs

---
 src/exceptions.rs | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

(limited to 'src/exceptions.rs')

diff --git a/src/exceptions.rs b/src/exceptions.rs
index 2929d65..7f00e5c 100644
--- a/src/exceptions.rs
+++ b/src/exceptions.rs
@@ -10,7 +10,7 @@ use int_enum::IntEnum;
 #[allow(dead_code)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, IntEnum)]
 pub enum ExceptionType {
-    InstructionAccessMisaligned = 0,
+    InstructionAddressMisaligned = 0,
     InstructionAccessFault = 1,
     IllegalInstruction = 2,
     Breakpoint = 3,
@@ -28,3 +28,35 @@ pub enum ExceptionType {
     SoftwareCheck = 18,
     HardwareError = 19,
 }
+
+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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