debug: revert to UEFI allocator, add screen_print for visibility

- Reverted to 6dd084b base (UEFI allocator that worked further)
- Replaced log::info with screen_print for on-screen visibility
- Reduced stalls from 30s to 1-3s for faster iteration

Author: J-x-Z

src/main.rs

@@ -148,50 +148,45 @@ fn main(_image_handle: Handle, mut system_table: SystemTable<Boot>) -> Status {
     }
 
     // 3. Initialize Memory Management
-    
-    // 3. Initialize Memory Management
-    early_serial_print(b"[BOOT] Initializing MM...\r\n");
-    log::info!("[Kernel] Initializing Memory Management...");
-    // STALL 2s
-    system_table.boot_services().stall(2_000_000);
+    screen_print!(system_table, "[Kernel] Initializing Memory Management...");
+    system_table.boot_services().stall(1_000_000); // STALL 1s
 
     let (phys_offset, memory_map_iter) = mm::init(&system_table);
-    log::info!("[Kernel] Memory Management initialized");
+    screen_print!(system_table, "[Kernel] Memory Management initialized");
 
     // 4. Initialize Filesystem (RamFS)
-    early_serial_print(b"[BOOT] Initializing FS...\r\n");
-    log::info!("[Kernel] Initializing Filesystem...");
+    screen_print!(system_table, "[Kernel] Initializing Filesystem...");
     fs::init(phys_offset);
-    // STALL 2s
-    system_table.boot_services().stall(2_000_000);
+    system_table.boot_services().stall(1_000_000); // STALL 1s
 
     // 5. Initialize Scheduler
-    log::info!("[Kernel] Initializing Scheduler...");
+    screen_print!(system_table, "[Kernel] Initializing Scheduler...");
     sched::init();
 
     // 6. Initialize Drivers
-    log::info!("[Kernel] Initializing Drivers...");
+    screen_print!(system_table, "[Kernel] Initializing Drivers...");
     drivers::init();
-    system_table.boot_services().stall(30_000_000); // STALL 30s
+    system_table.boot_services().stall(1_000_000); // STALL 1s
 
     // 7. Enable Interrupts (NOW it's safe)
     #[cfg(target_arch = "x86_64")]
     {
+        screen_print!(system_table, "[Kernel] About to enable interrupts...");
         interrupts::enable();
-        log::info!("[Kernel] Interrupts ENABLED");
+        screen_print!(system_table, "[Kernel] Interrupts ENABLED");
     }
-    system_table.boot_services().stall(30_000_000); // STALL 30s
+    system_table.boot_services().stall(3_000_000); // STALL 3s
 
     // For testing: set to true to use simple init.bin instead of BusyBox
     const USE_SIMPLE_INIT: bool = false;
 
     // 7. Load Init Process
     let init_path = if USE_SIMPLE_INIT { "/init" } else { "/bin/busybox" };
-    log::info!("[Kernel] Loading {}...", init_path);
-    system_table.boot_services().stall(30_000_000); // STALL 30s
+    screen_print!(system_table, "[Kernel] Loading init process...");
+    system_table.boot_services().stall(1_000_000); // STALL 1s
 
-    log::info!("[Kernel] DEBUG: About to call fs::open");
-    system_table.boot_services().stall(30_000_000); // STALL 30s
+    screen_print!(system_table, "[Kernel] DEBUG: About to call fs::open");
+    system_table.boot_services().stall(1_000_000); // STALL 1s
 
     if let Ok(inode) = fs::open(init_path, 0) {
         log::info!("[Kernel] DEBUG: fs::open succeeded");