Add Hello World

.gitignore

@@ -0,0 +1 @@
+/disk.img

Makefile

@@ -0,0 +1,27 @@
+PROFILE=debug
+
+.PHONY: FORCE
+
+bootloader/target/x86_64-unknown-uefi/$(PROFILE)/bootloader.efi: FORCE
+	cd bootloader && \
+	cargo build 
+
+disk.img: bootloader/target/x86_64-unknown-uefi/$(PROFILE)/bootloader.efi
+#	qemu-img create [-f format] [-o options] filename [size][preallocation]
+#	mkfs.fat [-n VOLUME-NAME] [-s SECTORS-PER-CLUSTER] [-f NUMBER-OF-FATS] [-R NUMBER-OF-RESERVED-SECTORS] [-F FAT-SIZE]
+#	ref.) `man mkfs.fat`
+#	mount [-o options] device dir
+#	loop -> mount as loop device
+	qemu-img create -f raw disk.img 200M && \
+	mkfs.fat -n "lemola_osv2" -s 2 -f 2 -R 32 -F 32 disk.img && \
+	mkdir -p mnt && \
+	sudo mount -o loop disk.img mnt && \
+	sudo mkdir -p mnt/EFI/BOOT && \
+	sudo cp bootloader/target/x86_64-unknown-uefi/$(PROFILE)/bootloader.efi mnt/EFI/BOOT/BOOTX64.EFI && \
+	sudo umount mnt
+
+run: disk.img
+	qemu-system-x86_64 \
+		-drive if=pflash,file=ovmf/OVMF_CODE.fd \
+		-drive if=pflash,file=ovmf/lemola_os_ovmf_vars.fd \
+		-hda disk.img

bootloader/src/main.rs

@@ -2,11 +2,22 @@
 #![no_std]
 #![feature(abi_efiapi)]
 
+use core::arch::asm;
+
 use uefi::prelude::*;
+use uefi_services::println;
 
 #[entry]
 fn main(_handle: Handle, mut system_table: SystemTable<Boot>) -> Status {
     uefi_services::init(&mut system_table).unwrap();
 
+    println!("Hello from uefi.rs");
+
+    loop {
+        unsafe {
+            asm!("hlt");
+        }
+    }
+
     Status::SUCCESS
 }

setup.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# only for ubuntu
+
+# NOTE* install rust before run this
+
+sudo apt-get install qemu-kvm -y
+sudo apt-get install ovmf -y
+
+# setup ovmf files by yourself
+
+# cp /usr/share/OVMF/OVMF_VARS.fd ./ovmf/lemola_os_ovmf_vars.fd
+# cp /usr/share/OVMF/OVMF_CODE.fd ./ovmf/OVMF_CODE.fd