riscv: define mstatush CSR with macro helpers

Uses CSR macro helpers to define the `mstatush` CSR register.

Author: rmsyn

riscv/src/register/mstatush.rs

@@ -2,28 +2,26 @@
 
 pub use super::mstatus::Endianness;
 
-/// mstatus register
-#[derive(Clone, Copy, Debug)]
-pub struct Mstatush {
-    bits: usize,
+read_write_csr! {
+    /// mstatus register
+    Mstatush: 0x310,
+    mask: 0x30,
 }
 
-impl Mstatush {
+read_write_csr_field! {
+    Mstatush,
     /// S-mode non-instruction-fetch memory endianness
-    #[inline]
-    pub fn sbe(&self) -> Endianness {
-        Endianness::from(self.bits & (1 << 4) != 0)
-    }
+    sbe,
+    Endianness: [4:4],
+}
 
+read_write_csr_field! {
+    Mstatush,
     /// M-mode non-instruction-fetch memory endianness
-    #[inline]
-    pub fn mbe(&self) -> Endianness {
-        Endianness::from(self.bits & (1 << 5) != 0)
-    }
+    mbe,
+    Endianness: [5:5],
 }
 
-read_csr_as_rv32!(Mstatush, 0x310);
-write_csr_rv32!(0x310);
 set_rv32!(0x310);
 clear_rv32!(0x310);