Merge pull request #198 from dreiss/master

Add some utility methods to Mstatus and Mcause

Author: almindor

riscv/CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+- Add `Mcause::from(usize)` for use in unit tests
+- Add `Mstatus.bits()`
+
 ### Fixed
 
 - Fixed `sip::set_ssoft` and `sip::clear_ssoft` using wrong address

riscv/src/register/mcause.rs

@@ -6,6 +6,13 @@ pub struct Mcause {
     bits: usize,
 }
 
+impl From<usize> for Mcause {
+    #[inline]
+    fn from(bits: usize) -> Self {
+        Self { bits }
+    }
+}
+
 /// Trap Cause
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Trap {

riscv/src/register/mstatus.rs

@@ -65,6 +65,12 @@ impl From<bool> for Endianness {
 }
 
 impl Mstatus {
+    /// Returns the contents of the register as raw bits
+    #[inline]
+    pub fn bits(&self) -> usize {
+        self.bits
+    }
+
     /// Supervisor Interrupt Enable
     #[inline]
     pub fn sie(&self) -> bool {