Move lapic to kernel virtual

src/arch/x86_64/driver/mod.rs

@@ -14,7 +14,6 @@ pub fn init(mut page_map: impl FnMut(usize, usize)) -> acpi::AcpiResult {
     page_map(0, 1); // EBDA
     page_map(0xe0_000, 0x100 - 0xe0);
     page_map(0x07fe1000, 1); // RSDT
-    page_map(0xfee00000, 1);  // LAPIC
     page_map(0xfec00000, 1);  // IOAPIC
 
     let acpi = acpi::init().expect("Failed to init ACPI");
@@ -23,7 +22,8 @@ pub fn init(mut page_map: impl FnMut(usize, usize)) -> acpi::AcpiResult {
 
     if cfg!(feature = "use_apic") {
         pic::disable();
-        apic::init(acpi.lapic_addr, acpi.ioapic_id);
+        use consts::KERNEL_OFFSET;
+        apic::init((KERNEL_OFFSET + 0xfee00000) as *const (), acpi.ioapic_id);
     } else {
         pic::init();
     }

src/memory/memory_set.rs

@@ -235,7 +235,6 @@ fn new_page_table_with_kernel() -> InactivePageTable {
     active_table.with(&mut page_table, |pt: &mut ActivePageTable| {
         table[KERNEL_PML4] = e510;
         table[KERNEL_HEAP_PML4] = e509;
-        pt.identity_map(Frame::of_addr(0xfee00000), EntryFlags::PRESENT | EntryFlags::WRITABLE, &mut frame_allocator()).unwrap().flush(); // LAPIC
     });
     page_table
 }

src/memory/mod.rs

@@ -135,6 +135,7 @@ fn remap_the_kernel(boot_info: BootInformation) -> MemorySet {
 
     use consts::{KERNEL_OFFSET, KERNEL_HEAP_OFFSET, KERNEL_HEAP_SIZE};
     memory_set.push(MemoryArea::new_kernel(KERNEL_OFFSET + 0xb8000, KERNEL_OFFSET + 0xb9000, MemoryAttr::default(), "VGA"));
+    memory_set.push(MemoryArea::new_kernel(KERNEL_OFFSET + 0xfee00000, KERNEL_OFFSET + 0xfee01000, MemoryAttr::default(), "LAPIC"));
     memory_set.push(MemoryArea::new(KERNEL_HEAP_OFFSET, KERNEL_HEAP_OFFSET + KERNEL_HEAP_SIZE, MemoryAttr::default(), "kernel_heap"));
     debug!("{:#x?}", memory_set);