feat: add uefi shell and edk2 guide

Author: initdc

.gitignore

@@ -1,6 +1,8 @@
 *.img
 *.bin
 *.fd
+*.efi
+*.EFI
 
 /test
 /rootfs

Makefile

@@ -48,6 +48,19 @@ efi:
 	-device virtio-blk-device,drive=hd0 \
 	$(EXTRA_ARG)
 
+# press ESC or F2 to enter bios
+edk2:
+	qemu-system-aarch64 -m 1024 -smp 2 -cpu cortex-a57 -M virt -nographic \
+	-drive if=pflash,format=raw,readonly=on,file=QEMU_EFI_64M.fd \
+	-drive if=pflash,format=raw,file=varstore.img \
+	-boot menu=on,splash-time=30000
+
+uefi-shell:
+	qemu-system-aarch64 -m 1024 -smp 2 -cpu cortex-a57 -M virt -nographic \
+	-drive if=pflash,format=raw,readonly=on,file=QEMU_EFI_64M.fd \
+	-drive if=pflash,format=raw,file=varstore.img \
+	-drive file=fat:rw:test
+
 uboot-efi:
 	qemu-system-aarch64 -m 1024 -smp 2 -cpu cortex-a57 -M virt -nographic \
 	-bios u-boot.bin \

README.md

@@ -42,6 +42,15 @@ pkill -f qemu-system-aarch64
   truncate -s 64M varstore.img
   ```
 
+- UEFI Shell https://github.com/pbatard/UEFI-Shell
+
+  ```
+  mkdir -p test/EFI/BOOT
+  cp shellaa64.efi test/EFI/BOOT/BOOTAA64.EFI
+
+  make uefi-shell
+  ```
+
 ### Guide
 
 https://openwrt.org/docs/guide-user/virtualization/qemu