From cf30d2922270a47c9e0336611477befcf8fa4239 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Thu, 11 Aug 2022 11:42:32 +0200
Subject: add basic loongarch support, qemu does not boot the kernel, yet

---
 target/loongarch/Makefile               | 62 +++++++++++++++++++++++++++++++++
 target/loongarch/kernel/qemu-loongarch  |  7 ++++
 target/loongarch/systems/qemu-loongarch |  7 ++++
 3 files changed, 76 insertions(+)
 create mode 100644 target/loongarch/Makefile
 create mode 100644 target/loongarch/kernel/qemu-loongarch
 create mode 100644 target/loongarch/systems/qemu-loongarch

(limited to 'target/loongarch')

diff --git a/target/loongarch/Makefile b/target/loongarch/Makefile
new file mode 100644
index 000000000..b8569d69a
--- /dev/null
+++ b/target/loongarch/Makefile
@@ -0,0 +1,62 @@
+# This file is part of the OpenADK project. OpenADK is copyrighted
+# material, please see the LICENCE file in the top-level directory.
+
+include $(ADK_TOPDIR)/rules.mk
+include $(ADK_TOPDIR)/mk/kernel-build.mk
+include $(ADK_TOPDIR)/mk/image.mk
+
+KERNEL:=$(LINUX_DIR)/vmlinux
+
+QEMU_ARGS:=-M virt
+QEMU_ARGS+=-nographic
+#
+# target helper text
+ifeq ($(ADK_TARGET_FS),archive)
+targethelp:
+	@echo "The RootFS tarball is: $(FW_DIR)/$(ROOTFSTARBALL)"
+ifeq ($(ADK_TARGET_QEMU),y)
+	@echo 'The kernel file is: $(FW_DIR)/${TARGET_KERNEL}'
+	@echo "Use following command to create a QEMU Image:"
+	@echo "./scripts/create.sh qemu-${ADK_TARGET_CPU_ARCH}.img $(FW_DIR)/$(ROOTFSUSERTARBALL)"
+	@echo "Start qemu with following options:"
+	@echo 'qemu-system-${ADK_TARGET_CPU_ARCH} ${QEMU_ARGS} -kernel $(FW_DIR)/$(TARGET_KERNEL) qemu-${ADK_TARGET_CPU_ARCH}.img'
+endif
+endif
+ifeq ($(ADK_TARGET_FS),initramfs)
+targethelp:
+	@echo 'The kernel file is: $(FW_DIR)/${TARGET_KERNEL}'
+	@echo 'The initramfs image is: ${FW_DIR}/${INITRAMFS}'
+ifeq ($(ADK_TARGET_QEMU),y)
+	@echo "Start qemu with following command line:"
+	@echo 'qemu-system-${ADK_TARGET_CPU_ARCH} ${QEMU_ARGS} -kernel $(FW_DIR)/$(TARGET_KERNEL) -initrd ${FW_DIR}/${INITRAMFS}'
+endif
+endif
+ifeq ($(ADK_TARGET_FS),initramfsarchive)
+targethelp:
+	@echo 'The kernel file is: $(FW_DIR)/${TARGET_KERNEL}'
+	@echo "The RootFS tarball is: $(FW_DIR)/$(ROOTFSUSERTARBALL)"
+endif
+ifeq ($(ADK_TARGET_FS),initramfspiggyback)
+targethelp:
+	@echo 'The kernel+initramfs file is: $(FW_DIR)/${TARGET_KERNEL}'
+ifeq ($(ADK_TARGET_QEMU),y)
+	@echo "Start qemu with following command line:"
+	@echo 'qemu-system-${ADK_TARGET_CPU_ARCH} ${QEMU_ARGS} -kernel $(FW_DIR)/$(TARGET_KERNEL)'
+endif
+endif
+
+kernel-strip:
+
+kernel-install: kernel-strip
+	@cp $(KERNEL) $(FW_DIR)/$(TARGET_KERNEL)
+
+# filesystem specific targets
+ifeq ($(ADK_TARGET_FS),initramfs)
+imageinstall: kernel-install $(FW_DIR)/$(INITRAMFS) targethelp
+endif
+ifeq ($(ADK_TARGET_FS),initramfsarchive)
+imageinstall: kernel-install $(FW_DIR)/$(ROOTFSUSERTARBALL) targethelp
+endif
+ifeq ($(ADK_TARGET_FS),initramfspiggyback)
+imageinstall: createinitramfs targethelp
+endif
diff --git a/target/loongarch/kernel/qemu-loongarch b/target/loongarch/kernel/qemu-loongarch
new file mode 100644
index 000000000..582028585
--- /dev/null
+++ b/target/loongarch/kernel/qemu-loongarch
@@ -0,0 +1,7 @@
+CONFIG_LOONGARCH=y
+CONFIG_64BIT=y
+CONFIG_MACH_LOONGSON64=y
+CONFIG_EFI=y
+CONFIG_SMP=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
diff --git a/target/loongarch/systems/qemu-loongarch b/target/loongarch/systems/qemu-loongarch
new file mode 100644
index 000000000..b5f6c3d34
--- /dev/null
+++ b/target/loongarch/systems/qemu-loongarch
@@ -0,0 +1,7 @@
+config ADK_TARGET_SYSTEM_QEMU_LOONGARCH
+	bool "Qemu Emulator"
+	select ADK_TARGET_QEMU
+	select ADK_TARGET_CPU_LOONGARCH
+	help
+	  Support for Qemu Emulator Loongarch architecture.
+
-- 
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