rust-osdev
diff --git a/‎bios/common/src/lib.rs
Copy file name to clipboardExpand all lines: bios/common/src/lib.rs
+1Lines changed: 1 addition & 0 deletions b/‎bios/common/src/lib.rs
Copy file name to clipboardExpand all lines: bios/common/src/lib.rs
+1Lines changed: 1 addition & 0 deletions
diff --git a/‎bios/stage-2/src/main.rs
Copy file name to clipboardExpand all lines: bios/stage-2/src/main.rs
+1Lines changed: 1 addition & 0 deletions b/‎bios/stage-2/src/main.rs
Copy file name to clipboardExpand all lines: bios/stage-2/src/main.rs
+1Lines changed: 1 addition & 0 deletions
diff --git a/‎bios/stage-4/src/main.rs
Copy file name to clipboardExpand all lines: bios/stage-4/src/main.rs
+1-8Lines changed: 1 addition & 8 deletions b/‎bios/stage-4/src/main.rs
Copy file name to clipboardExpand all lines: bios/stage-4/src/main.rs
+1-8Lines changed: 1 addition & 8 deletions
@@ -9,6 +9,7 @@ pub struct BiosInfo {
     pub kernel: Region,
     pub ramdisk: Region,
     pub config_file: Region,
+    pub last_used_addr: u64,
     pub framebuffer: BiosFramebufferInfo,
     pub memory_map_addr: u32,
     pub memory_map_len: u16,
 
@@ -161,6 +161,7 @@ fn start(disk_number: u16, partition_table_start: *const u8) -> ! {
             start: config_file_start as u64,
             len: config_file_len,
         },
+        last_used_addr: config_file_start as u64 + config_file_len - 1,
         memory_map_addr: memory_map.as_mut_ptr() as u32,
         memory_map_len: memory_map.len().try_into().unwrap(),
         framebuffer: BiosFramebufferInfo {
 
@@ -54,14 +54,7 @@ pub extern "C" fn _start(info: &mut BiosInfo) -> ! {
         PhysAddr::new(info.kernel.start)
     };
     let kernel_size = info.kernel.len;
-    let next_free_frame = match info.ramdisk.len {
-        0 => PhysFrame::containing_address(kernel_start + kernel_size - 1u64) + 1,
-        _ => {
-            PhysFrame::containing_address(PhysAddr::new(
-                info.ramdisk.start + info.ramdisk.len - 1u64,
-            )) + 1
-        }
-    };
+    let next_free_frame = PhysFrame::containing_address(PhysAddr::new(info.last_used_addr)) + 1;
     let mut frame_allocator = LegacyFrameAllocator::new_starting_at(
         next_free_frame,
         memory_map.iter().copied().map(MemoryRegion),