Implement domain and endpoint modules with capability management, message passing, and scheduling features

crates/types/src/address.rs

@@ -3,3 +3,12 @@ pub struct EntryPoint(usize);
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct StackPointer(usize);
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct VirtualAddress(usize);
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct DataRef {
+    addr: VirtualAddress,
+    len: usize,
+}

crates/types/src/bounded.rs

@@ -2,3 +2,4 @@ use crate::macros::bounded;
 
 bounded!(CapSlot, u8, 0, 63);
 bounded!(Priority, u8, 0, 31);
+bounded!(PageCount, u16, 1, 1024);

crates/types/src/time.rs

@@ -9,3 +9,27 @@ impl Ticks {
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct TimerDuration(u32);
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct TimeSlice {
+    remaining: u32,
+    quantum: u32,
+}
+
+impl TimeSlice {
+    pub fn new(quantum: u32) -> Self {
+        Self {
+            remaining: quantum,
+            quantum,
+        }
+    }
+
+    pub fn tick(&mut self) -> bool {
+        self.remaining = self.remaining.saturating_sub(1);
+        self.remaining == 0
+    }
+
+    pub fn reset(&mut self) {
+        self.remaining = self.quantum;
+    }
+}