feat: simple drawing board GUI

os/Makefile

@@ -12,6 +12,12 @@ BOARD := qemu
 SBI ?= rustsbi
 BOOTLOADER := ../bootloader/$(SBI)-$(BOARD).bin
 
+# GUI
+GUI ?= off
+ifeq ($(GUI), off)
+	GUI_OPTION := -display none
+endif
+
 # Building mode argument
 ifeq ($(MODE), release)
 	MODE_ARG := --release
@@ -67,27 +73,12 @@ disasm-vim: kernel
 
 run: run-inner
 
-gui: build
-ifeq ($(BOARD),qemu)
-	@qemu-system-riscv64 \
-		-M 128m \
-		-machine virt \
-		-bios $(BOOTLOADER) \
-		-device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) \
-		-drive file=$(FS_IMG),if=none,format=raw,id=x0 \
-        -device virtio-blk-device,drive=x0 \
-		-device virtio-gpu-device  \
-		-device virtio-keyboard-device  \
-		-device virtio-mouse-device \
-		-serial stdio 
-endif
-
 run-inner: build
 	@qemu-system-riscv64 \
 		-M 128m \
 		-machine virt \
 		-bios $(BOOTLOADER) \
-		-display none \
+		$(GUI_OPTION) \
 		-device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) \
 		-drive file=$(FS_IMG),if=none,format=raw,id=x0 \
         -device virtio-blk-device,drive=x0 \
@@ -96,6 +87,10 @@ run-inner: build
 		-device virtio-mouse-device \
 		-serial stdio
 
+fdt:
+	@qemu-system-riscv64 -M 128m -machine virt,dumpdtb=virt.out
+	fdtdump virt.out
+
 debug: build
 	@tmux new-session -d \
 		"qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S" && \
@@ -109,4 +104,4 @@ gdbserver: build
 gdbclient:
 	@riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'
 
-.PHONY: build env kernel clean disasm disasm-vim run-inner fs-img gdbserver gdbclient
+.PHONY: build env kernel clean disasm disasm-vim run-inner fs-img gdbserver gdbclient fdt