diff --git a/Makefile b/Makefile
index 5694dab..21c1647 100644
--- a/Makefile
+++ b/Makefile
@@ -1,101 +1,77 @@
-
-
-LIB_DIRS := $(wildcard src/libs/*.c)
-OBJS := $(shell mkdir -p output; find output -name '*.o')
-
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NS = nasm
-NSFLAGS = -f elf32
-
-LIBS_C := $(shell find src/libs -type f -name '*.c')
-LIBS_S := $(shell find src/libs -type f -name '*.asm')
-KERNEL_C := $(shell find src/kernel -name *.c)
-KERNEL_S := $(shell find src/kernel -name *.asm)
-API_C    := $(shell find src/api -name *.c)
-API_S    := $(shell find src/api -name *.asm)
-
-
+include common.mk
+
+# ==============================================================================
+# Sources
+# ==============================================================================
+LIBS_C   := $(shell find src/libs   -type f -name '*.c')
+LIBS_S   := $(shell find src/libs   -type f -name '*.asm')
+KERNEL_C := $(shell find src/kernel -type f -name '*.c')
+KERNEL_S := $(shell find src/kernel -type f -name '*.asm')
+API_C    := $(shell find src/api    -type f -name '*.c')
+API_S    := $(shell find src/api    -type f -name '*.asm')
+
+OBJS     := $(shell mkdir -p output; find output -name '*.o')
+
+# ==============================================================================
+# Build rule helper
+# ==============================================================================
 define build-rule
-    for src in $(1); do \
-        obj=$$(echo $$src | sed 's|$(2)|$(3)|' | sed 's|$(4)$$|$(5)|'); \
-        echo "Building $$src -> $$obj"; \
-        mkdir -p $$(dirname $$obj); \
-        if echo $$src | grep -q "\.c$$"; then \
-            $(6) $(7) -c $$src -o $$obj; \
-        else \
-            $(6) $(7) $$src -o $$obj; \
-        fi; \
-    done
+	for src in $(1); do \
+		obj=$$(echo $$src | sed 's|$(2)|$(3)|' | sed 's|$(4)$$|$(5)|'); \
+		echo "Building $$src -> $$obj"; \
+		mkdir -p $$(dirname $$obj); \
+		if echo $$src | grep -q "\.c$$"; then \
+			$(CC) $(CFLAGS) -c $$src -o $$obj; \
+		else \
+			$(AS) $(ASFLAGS) $$src -o $$obj; \
+		fi; \
+	done
 endef
 
+# ==============================================================================
+# Targets
+# ==============================================================================
+.PHONY: all build drivers libs kernel k_api link clean make_iso make_disk run
 
-all:
-	$(MAKE) build
-	$(MAKE) make_iso
-	$(MAKE) make_disk
-	$(MAKE) run
-
+all: build make_iso make_disk run
 
+build: clean drivers libs kernel link
 
 drivers:
 	$(MAKE) -C ./src/drivers/
 
-
 libs:
 	mkdir -p output/libs
-	$(call build-rule,$(LIBS_C),src/libs,output/libs,.c,.o,$(CC),$(CFLAGS))
-	$(call build-rule,$(LIBS_S),src/libs,output/libs,.asm,.o,$(NS),$(NSFLAGS))
+	$(call build-rule,$(LIBS_C),src/libs,output/libs,.c,.o)
+	$(call build-rule,$(LIBS_S),src/libs,output/libs,.asm,.o)
 
-
-kernel:
+kernel: libs
 	mkdir -p output/kernel/
-	$(call build-rule,$(KERNEL_C),src/kernel,output/kernel,.c,.o,$(CC),$(CFLAGS))
-	$(call build-rule,$(KERNEL_S),src/kernel,output/kernel,.asm,.o,$(NS),$(NSFLAGS))
-
+	$(call build-rule,$(KERNEL_C),src/kernel,output/kernel,.c,.o)
+	$(call build-rule,$(KERNEL_S),src/kernel,output/kernel,.asm,.o)
 	$(MAKE) k_api
 
-
 k_api:
 	mkdir -p output/api/
-	$(call build-rule,$(API_C),src/api,output/api,.c,.o,$(CC),$(CFLAGS))
-	$(call build-rule,$(API_S),src/api,output/api,.asm,.o,$(NS),$(NSFLAGS))
-
+	$(call build-rule,$(API_C),src/api,output/api,.c,.o)
+	$(call build-rule,$(API_S),src/api,output/api,.asm,.o)
 
 link:
-	i386-elf-ld -m elf_i386 -T src/linker.ld --oformat elf32-i386 -o output/kernel.elf $(OBJS)
-
+	$(LD) $(LDFLAGS) -o output/kernel.elf $(OBJS)
 
 clean:
 	rm -rf output/
 
-
-build:
-	echo "\n --- --- clean --- --- \n"
-	$(MAKE) clean
-	echo "\n --- --- drivers --- --- \n"
-	$(MAKE) drivers
-	echo "\n --- --- libs --- --- \n"
-	$(MAKE) libs
-	echo "\n --- --- kernel --- --- \n"
-	$(MAKE) kernel
-	echo "\n --- --- link --- --- \n"
-	$(MAKE) link
-
-
 make_iso:
-	# Make ISO
 	cp output/kernel.elf iso/boot/
 	grub-mkrescue -o output/os.iso ./iso/
 
 make_disk:
-	# Make hard disk
 	dd if=/dev/zero of=output/disk.img bs=512 count=20480
 
 run:
 	qemu-system-i386 -no-reboot -no-shutdown -monitor stdio \
-	-drive file=./disk.img,format=raw,if=ide,index=0,media=disk \
-	-drive file=output/os.iso,format=raw,if=ide,index=1,media=cdrom \
-	-d int,cpu_reset -D qemu.log \
-	-boot d
+		-drive file=./output/disk.img,format=raw,if=ide,index=0,media=disk \
+		-drive file=output/os.iso,format=raw,if=ide,index=1,media=cdrom \
+		-d int,cpu_reset -D qemu.log \
+		-boot d
diff --git a/common.mk b/common.mk
new file mode 100644
index 0000000..c4fdfa6
--- /dev/null
+++ b/common.mk
@@ -0,0 +1,24 @@
+# Путь до корня проекта, независимо от того, откуда включают
+ROOT_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+
+# ==============================================================================
+# Toolchain
+# ==============================================================================
+CROSS   ?= i386-elf
+PREFIX  := $(CROSS)-
+
+CC      := $(PREFIX)gcc
+LD      := $(PREFIX)ld
+AR      := $(PREFIX)ar
+NM      := $(PREFIX)nm
+OBJCOPY := $(PREFIX)objcopy
+OBJDUMP := $(PREFIX)objdump
+STRIP   := $(PREFIX)strip
+AS      := nasm
+
+# ==============================================================================
+# Flags
+# ==============================================================================
+CFLAGS  := -w -ffreestanding -m32 -fno-pie -nostdlib
+LDFLAGS := -m elf_i386 -T $(ROOT_DIR)src/linker.ld --oformat elf32-i386
+ASFLAGS := -f elf32
diff --git a/src/drivers/Makefile b/src/drivers/Makefile
index 3a2b4b6..ee995e1 100644
--- a/src/drivers/Makefile
+++ b/src/drivers/Makefile
@@ -1,35 +1,23 @@
-# Собираем все драйверы верхнего уровня
-DRIVERS_SRC := $(wildcard *.c) $(wildcard *.asm)
-DRIVERS_OBJ := $(DRIVERS_SRC:.c=.o)
-DRIVERS_OBJ := $(DRIVERS_OBJ:.asm=.o)
+include ../../common.mk
 
-# Находим директории драйверов
-DRIVER_DIRS := $(filter-out .,$(wildcard */))
+DRIVER_DIRS   := $(filter-out .,$(wildcard */))
+DRIVER_OUTPUT := ../../output/drivers/
 
-# Путь куда
-DRIVER_OUTPUT = ../../output/drivers/
+all: drivers
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NS = nasm
-NSFLAGS = -f elf32
-
-all: $(DRIVERS_OBJ) drivers
-
-# Сборка файлов в текущей папке
+# Файлы прямо в этой папке (если появятся)
 %.o: %.c
 	mkdir -p $(DRIVER_OUTPUT)
 	$(CC) $(CFLAGS) -c $< -o $(DRIVER_OUTPUT)$@
 
 %.o: %.asm
 	mkdir -p $(DRIVER_OUTPUT)
-	$(NS) $(NSFLAGS) $< -o $(DRIVER_OUTPUT)$@
+	$(AS) $(ASFLAGS) $< -o $(DRIVER_OUTPUT)$@
 
 # Сборка драйверов в подпапках
 drivers:
 	@for dir in $(DRIVER_DIRS); do \
-		if [ -f $$dir/Makefile ] || [ -f $$dir/makefile ]; then \
+		if [ -f $$dir/Makefile ]; then \
 			echo "==> Building driver in $$dir"; \
 			$(MAKE) -C $$dir; \
 		else \
diff --git a/src/drivers/ata/Makefile b/src/drivers/ata/Makefile
index 23baa2c..7bb84d1 100644
--- a/src/drivers/ata/Makefile
+++ b/src/drivers/ata/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = ata
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := ata
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c ata.c -o $(OBJ_DIR)/ata.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/ata_drive/Makefile b/src/drivers/ata_drive/Makefile
index f45b2ec..f9eab3a 100644
--- a/src/drivers/ata_drive/Makefile
+++ b/src/drivers/ata_drive/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = ata_drive
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := ata_drive
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c ata_drive.c -o $(OBJ_DIR)/ata_drive.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/display/Makefile b/src/drivers/display/Makefile
index c63cbcb..787ca9f 100644
--- a/src/drivers/display/Makefile
+++ b/src/drivers/display/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = display
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := display
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c display.c -o $(OBJ_DIR)/display.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/fat/Makefile b/src/drivers/fat/Makefile
index 4331d9b..fc80856 100644
--- a/src/drivers/fat/Makefile
+++ b/src/drivers/fat/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = fat
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := fat
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c fat.c -o $(OBJ_DIR)/fat.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/keyboard/Makefile b/src/drivers/keyboard/Makefile
index 42cce64..4848577 100644
--- a/src/drivers/keyboard/Makefile
+++ b/src/drivers/keyboard/Makefile
@@ -1,13 +1,9 @@
-DRIVER_NAME = keyboard
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := keyboard
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c keyboard.c -o $(OBJ_DIR)/keyboard.o
-	$(NSM) $(NSMFLAGS) keyboard_handler.asm -o $(OBJ_DIR)/keyboard_handler.o
+	$(CC) $(CFLAGS) -c keyboard.c           -o $(OBJ_DIR)/keyboard.o
+	$(AS) $(ASFLAGS)   keyboard_handler.asm -o $(OBJ_DIR)/keyboard_handler.o
diff --git a/src/drivers/mbr/Makefile b/src/drivers/mbr/Makefile
index 16273c2..6cb3656 100644
--- a/src/drivers/mbr/Makefile
+++ b/src/drivers/mbr/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = mbr
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := mbr
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c mbr.c -o $(OBJ_DIR)/mbr.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/pci/Makefile b/src/drivers/pci/Makefile
index f8d03f6..ed5700f 100644
--- a/src/drivers/pci/Makefile
+++ b/src/drivers/pci/Makefile
@@ -1,12 +1,8 @@
-DRIVER_NAME = pci
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := pci
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c pci.c -o $(OBJ_DIR)/pci.o
+	$(CC) $(CFLAGS) -c $(DRIVER_NAME).c -o $(OBJ_DIR)/$(DRIVER_NAME).o
diff --git a/src/drivers/pit/Makefile b/src/drivers/pit/Makefile
index 21d1a3f..ac32f90 100644
--- a/src/drivers/pit/Makefile
+++ b/src/drivers/pit/Makefile
@@ -1,13 +1,9 @@
-DRIVER_NAME = pit
-OBJ_DIR = ../../../output/drivers/$(DRIVER_NAME)
+include ../../../common.mk
 
-CC = i386-elf-gcc
-CFLAGS = -w -ffreestanding -m32 -fno-pie -nostdlib
-
-NSM = nasm
-NSMFLAGS = -f elf32
+DRIVER_NAME := pit
+OBJ_DIR     := ../../../output/drivers/$(DRIVER_NAME)
 
 all:
 	mkdir -p $(OBJ_DIR)
-	$(CC) $(CFLAGS) -c pit.c -o $(OBJ_DIR)/pit.o
-	$(NSM) $(NSMFLAGS) pit_handler.asm -o $(OBJ_DIR)/pit_handler.o
+	$(CC) $(CFLAGS) -c pit.c           -o $(OBJ_DIR)/pit.o
+	$(AS) $(ASFLAGS)   pit_handler.asm -o $(OBJ_DIR)/pit_handler.o