Move `paging` mod to `arch`, as Redox did.

src/arch/x86_64/interrupt.rs

@@ -1,9 +0,0 @@
-use x86_64;
-
-pub fn enable() {
-    unsafe{ x86_64::instructions::interrupts::enable(); }	
-}
-
-pub fn disable() {
-    unsafe{ x86_64::instructions::interrupts::disable(); }	
-}

src/arch/x86_64/interrupt/mod.rs

@@ -0,0 +1,11 @@
+use x86_64;
+
+#[inline(always)]
+pub unsafe fn enable() {
+    x86_64::instructions::interrupts::enable();
+}
+
+#[inline(always)]
+pub unsafe fn disable() {
+    x86_64::instructions::interrupts::disable();
+}

src/arch/x86_64/mod.rs

@@ -1,6 +1,7 @@
 pub mod driver;
 pub mod cpu;
 pub mod interrupt;
+pub mod paging;
 
 pub fn init() {
 	cpu::enable_nxe_bit();

src/arch/x86_64/paging/mapper.rs

@@ -1,5 +1,4 @@
 use super::{Page, ENTRY_COUNT};
-use super::entry::*;
 use super::table::{self, Table, Level4, Level1};
 use memory::*;
 use core::ptr::Unique;
@@ -26,7 +25,7 @@ impl Mapper {
     pub fn translate(&self, virtual_address: VirtualAddress) -> Option<PhysicalAddress> {
         let offset = virtual_address % PAGE_SIZE;
         self.translate_page(Page::containing_address(virtual_address))
-            .map(|frame| PhysicalAddress((frame.number * PAGE_SIZE + offset) as u64))
+            .map(|frame| PhysicalAddress((frame.start_address().get() + offset) as u64))
     }
 
     pub fn translate_page(&self, page: Page) -> Option<Frame> {
@@ -39,11 +38,11 @@ impl Mapper {
                 if let Some(start_frame) = p3_entry.pointed_frame() {
                     if p3_entry.flags().contains(HUGE_PAGE) {
                         // address must be 1GiB aligned
-                        assert!(start_frame.number % (ENTRY_COUNT * ENTRY_COUNT) == 0);
-                        return Some(Frame {
-                            number: start_frame.number + page.p2_index() *
-                                    ENTRY_COUNT + page.p1_index(),
-                        });
+                        assert!(start_frame.start_address().get() % (ENTRY_COUNT * ENTRY_COUNT * PAGE_SIZE) == 0);
+                        return Some(Frame::containing_address(
+                            start_frame.start_address().get() + 
+                            (page.p2_index() * ENTRY_COUNT + page.p1_index()) * PAGE_SIZE
+                        ));
                     }
                 }
                 if let Some(p2) = p3.next_table(page.p3_index()) {
@@ -52,10 +51,10 @@ impl Mapper {
                     if let Some(start_frame) = p2_entry.pointed_frame() {
                         if p2_entry.flags().contains(HUGE_PAGE) {
                             // address must be 2MiB aligned
-                            assert!(start_frame.number % ENTRY_COUNT == 0);
-                            return Some(Frame {
-                                number: start_frame.number + page.p1_index()
-                            });
+                            assert!(start_frame.start_address().get() % ENTRY_COUNT == 0);
+                            return Some(Frame::containing_address(
+                                start_frame.start_address().get() + page.p1_index() * PAGE_SIZE
+                            ));
                         }
                     }
                 }

src/arch/x86_64/paging/mod.rs

@@ -1,7 +1,7 @@
 pub use self::entry::*;
 pub use self::mapper::Mapper;
 use core::ops::{Deref, DerefMut, Add};
-use super::*;
+use memory::*;
 pub use self::temporary_page::TemporaryPage;
 
 mod entry;
@@ -151,7 +151,9 @@ impl ActivePageTable {
 }
 
 pub struct InactivePageTable {
-    pub(in memory) p4_frame: Frame,
+    // WARNING: Don't change the struct. 
+    //          memory mod use the private p4_frame.
+    p4_frame: Frame,
 }
 
 impl InactivePageTable {

src/arch/x86_64/paging/table.rs

@@ -1,8 +1,8 @@
 use core::marker::PhantomData;
 use core::ops::{Index, IndexMut};
 use memory::FrameAllocator;
-use memory::paging::entry::*;
-use memory::paging::ENTRY_COUNT;
+use super::entry::*;
+use super::ENTRY_COUNT;
 
 pub const P4: *mut Table<Level4> = 0xffffffff_fffff000 as *mut _;
 

src/lib.rs

@@ -86,8 +86,8 @@ pub extern "C" fn rust_main(multiboot_information_address: usize) {
     } else {
         arch::driver::pic::init();
     }
-    arch::interrupt::enable();
-    loop{}
+    unsafe{ arch::interrupt::enable(); }
+
     test_end!();
 }
 

src/memory/address.rs

@@ -3,12 +3,16 @@ pub use x86_64::{PhysicalAddress};
 pub type VirtualAddress = usize;
 
 pub trait FromToVirtualAddress {
+	fn get(&self) -> usize;
 	fn to_identity_virtual(&self) -> VirtualAddress;
 	fn to_kernel_virtual(&self) -> VirtualAddress;
 	fn from_kernel_virtual(addr: VirtualAddress) -> Self;
 }
 
 impl FromToVirtualAddress for PhysicalAddress {
+	fn get(&self) -> usize {
+		self.0 as usize
+	}
 	fn to_identity_virtual(&self) -> VirtualAddress {
 		self.0 as usize
 	}

src/memory/frame.rs

@@ -0,0 +1,53 @@
+use super::address::PhysicalAddress;
+
+pub const PAGE_SIZE: usize = 4096;
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Frame {
+    pub(super) number: usize,
+}
+
+impl Frame {
+    pub fn containing_address(address: usize) -> Frame {
+        Frame{ number: address / PAGE_SIZE }
+    }
+    //TODO: Set private
+    pub fn start_address(&self) -> PhysicalAddress {
+        PhysicalAddress((self.number * PAGE_SIZE) as u64)
+    }
+
+    pub fn clone(&self) -> Frame {
+        Frame { number: self.number }
+    }
+    //TODO: Set private    
+    pub fn range_inclusive(start: Frame, end: Frame) -> FrameIter {
+        FrameIter {
+            start: start,
+            end: end,
+        }
+    }
+}
+
+pub struct FrameIter {
+    start: Frame,
+    end: Frame,
+}
+
+impl Iterator for FrameIter {
+    type Item = Frame;
+
+    fn next(&mut self) -> Option<Frame> {
+        if self.start <= self.end {
+            let frame = self.start.clone();
+            self.start.number += 1;
+            Some(frame)
+        } else {
+            None
+        }
+    }
+ }
+
+pub trait FrameAllocator {
+    fn allocate_frame(&mut self) -> Option<Frame>;
+    fn deallocate_frame(&mut self, frame: Frame);
+}

src/memory/mod.rs

@@ -1,18 +1,18 @@
 pub use self::area_frame_allocator::AreaFrameAllocator;
-pub use self::paging::*;
+pub use arch::paging::*;
 pub use self::stack_allocator::Stack;
 pub use self::address::*;
+pub use self::frame::*;
 
 use multiboot2::BootInformation;
 use consts::KERNEL_OFFSET;
+use arch::paging;
 
 mod area_frame_allocator;
 pub mod heap_allocator;
-mod paging;
 mod stack_allocator;
 mod address;
-
-pub const PAGE_SIZE: usize = 4096;
+mod frame;
 
 pub fn init(boot_info: &BootInformation) -> MemoryController {
     assert_has_not_been_called!("memory::init must be called only once");
@@ -133,8 +133,11 @@ pub fn remap_the_kernel<A>(allocator: &mut A, boot_info: &BootInformation)
     println!("NEW TABLE!!!");
 
     // turn the old p4 page into a guard page
+    let old_table_p4_frame = unsafe {
+        &*(&old_table as *const InactivePageTable as *const Frame)
+    };
     let old_p4_page = Page::containing_address(
-      old_table.p4_frame.start_address().to_kernel_virtual()
+        old_table_p4_frame.start_address().to_kernel_virtual()
     );
     active_table.unmap(old_p4_page, allocator);
     println!("guard page at {:#x}", old_p4_page.start_address());
@@ -142,56 +145,6 @@ pub fn remap_the_kernel<A>(allocator: &mut A, boot_info: &BootInformation)
     active_table
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Frame {
-    number: usize,
-}
-
-impl Frame {
-    fn containing_address(address: usize) -> Frame {
-        Frame{ number: address / PAGE_SIZE }
-    }
-
-    fn start_address(&self) -> PhysicalAddress {
-        PhysicalAddress((self.number * PAGE_SIZE) as u64)
-    }
-
-    fn clone(&self) -> Frame {
-        Frame { number: self.number }
-    }
-
-    fn range_inclusive(start: Frame, end: Frame) -> FrameIter {
-        FrameIter {
-            start: start,
-            end: end,
-        }
-    }
-}
-
-struct FrameIter {
-    start: Frame,
-    end: Frame,
-}
-
-impl Iterator for FrameIter {
-    type Item = Frame;
-
-    fn next(&mut self) -> Option<Frame> {
-        if self.start <= self.end {
-            let frame = self.start.clone();
-            self.start.number += 1;
-            Some(frame)
-        } else {
-            None
-        }
-    }
- }
-
-pub trait FrameAllocator {
-    fn allocate_frame(&mut self) -> Option<Frame>;
-    fn deallocate_frame(&mut self, frame: Frame);
-}
-
 pub struct MemoryController {
     active_table: paging::ActivePageTable,
     frame_allocator: AreaFrameAllocator,