(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

@@ -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,
+        }
+    }
+}