General updates.

Makefile

@@ -26,11 +26,22 @@ toolchain : buildroot
 	#cp buildroot-2022.02.6-config buildroot-2022.02.6/.config
 	#cp -a custom_kernel_config buildroot-2022.02.6/kernel_config
 	#cp riscv_Kconfig buildroot-2022.02.6/output/build/linux-5.15.67/arch/riscv/
-	#cp -a custom_kernel_config buildroot/kernel_config
-	#cp -a buildroot_config buildroot/.config
+	cp -a custom_kernel_config buildroot/kernel_config
+	cp -a buildroot_config buildroot/.config
 	#mkdir -p buildroot/board/riscv/nommu/patches
-	make -C buildroot qemu_riscv32_nommu_virt_minimal_defconfig
+	#make -C buildroot qemu_riscv32_nommu_virt_minimal_defconfig
+	make -C buildroot
 
+dtbextract :
+	# Need 	sudo apt  install device-tree-compiler
+	cd buildroot && output/host/bin/qemu-system-riscv32 -cpu rv32,mmu=false -m 128M -machine virt -nographic -kernel output/images/Image -bios none -drive file=output/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -machine dumpdtb=../dtb.dtb && cd ..
+	dtc -I dtb -O dts -o dtb.dts dtb.dtb
+
+gendtb :
+	dtc -I dts -O dtb -o minimal.dtb minimal.dts -S 8192
+
+test_minimaldtb :
+	cd buildroot && output/host/bin/qemu-system-riscv32 -cpu rv32,mmu=false -m 128M -machine virt -machine dtb=../minimal.dtb -nographic -kernel output/images/Image -bios none
 
 tests :
 	git clone https://github.com/riscv-software-src/riscv-tests

README.md

@@ -41,7 +41,9 @@ output/host/bin/qemu-system-riscv32 -cpu rv32,mmu=false -m 128M -machine virt -n
 output/host/bin/qemu-system-riscv32 -cpu rv32,mmu=false -m 128M -machine virt -nographic -kernel output/images/Image -bios none -drive file=output/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -machine dumpdtb=../dtb.dtb
 ```
 
-
+## Running from INITRD instead of DISK
+ * In buildroot: Filesystem Images, check cpio, no compression.
+ * In kernel: 
 
 ## Building Tests