Create a new AreaFrameAllocator and allocate maximum number of frames

src/lib.rs

@@ -15,6 +15,8 @@ mod memory;
 
 #[no_mangle]
 pub extern fn rust_main(multiboot_information_address: usize) {
+    use memory::FrameAllocator;
+
     vga_buffer::clear_screen();
     println!("Hello World{}", "!");
 
@@ -44,6 +46,17 @@ pub extern fn rust_main(multiboot_information_address: usize) {
     let multiboot_start = multiboot_information_address;
     let multiboot_end = multiboot_start + (boot_info.total_size as usize);
 
+    let mut frame_allocator = memory::AreaFrameAllocator::new(
+        kernel_start as usize, kernel_end as usize, multiboot_start,
+        multiboot_end, memory_map_tag.memory_areas());
+
+    for i in 0.. {
+        if let None = frame_allocator.allocate_frame() {
+            println!("allocated {} frames", i);
+            break;
+        }
+    }
+
     loop{}
 }
 

src/memory/mod.rs

@@ -1,3 +1,5 @@
+pub use self::area_frame_allocator::AreaFrameAllocator;
+
 mod area_frame_allocator;
 
 pub const PAGE_SIZE: usize = 4096;