wip add specific types

nucleus/src/caps/capnode_cap.rs

@@ -2,6 +2,8 @@
  * SPDX-License-Identifier: BlueOak-1.0.0
  */
 
+use crate::arch::aarch64::memory::PhysAddr;
+use ux::u6;
 use {
     super::{
         captable::CapTableEntry, derivation_tree::DerivationTreeNode, CapError, Capability, TryFrom,
@@ -24,6 +26,7 @@ register_bitfields! {
         GuardSize OFFSET(6) NUMBITS(6) [],
         Radix OFFSET(12) NUMBITS(6) [],
         Ptr OFFSET(16) NUMBITS(48) [],
+        // Guard is 19 bits in seL4 arm32 (?)
         Guard OFFSET(64) NUMBITS(64) [],
     ]
 }
@@ -38,23 +41,23 @@ impl CapNodeCapability {
     /// Create a capability to CapNode.
     ///
     /// CapNode capabilities allow to address a capability node tree entry.
-    pub fn new(pptr: u64, radix: u32, guard_size: u32, guard: u64) -> CapNodeCapability {
+    pub fn new(capnode_ptr: PhysAddr, radix: u6, guard_size: u6, guard: u64) -> CapNodeCapability {
         CapNodeCapability(LocalRegisterCopy::new(u128::from(
             CapNodeCap::Type::value
                 + CapNodeCap::Radix.val(radix.into())
                 + CapNodeCap::GuardSize.val(guard_size.into())
                 + CapNodeCap::Guard.val(guard.into())
-                + CapNodeCap::Ptr.val(pptr.into()),
+                + CapNodeCap::Ptr.val(capnode_ptr.into()),
         )))
     }
 
     /// Create new root node.
-    pub fn new_root(pptr: u64) -> CapNodeCapability {
+    pub fn new_root(capnode_ptr: PhysAddr) -> CapNodeCapability {
         const CONFIG_ROOT_CAPNODE_SIZE_BITS: u32 = 12;
         const WORD_BITS: u32 = 64;
 
         CapNodeCapability::new(
-            pptr,
+            capnode_ptr,
             CONFIG_ROOT_CAPNODE_SIZE_BITS,
             WORD_BITS - CONFIG_ROOT_CAPNODE_SIZE_BITS,
             0,