From e840986fa432888fbc893cd963dcd08a0020b668 Mon Sep 17 00:00:00 2001
From: Jiajie Chen <c@jia.je>
Date: Mon, 2 May 2022 20:12:45 +0800
Subject: [PATCH] loongarch64: add initial loongarch support

This commit adds architecture support for LoongArch.

The toolchain currently only supports the 64-bit target
loongarch64-unknown-linux-gnu.

It has been tested to build with GCC 12.1, GDB 12.1, Glibc 2.36, Linux
5.19 and Binutils 2.39 as of Aug 2022.

Signed-off-by: Jiajie Chen <c@jia.je>
---
 config/arch/loongarch.in        | 19 +++++++++++++++++++
 scripts/build/arch/loongarch.sh |  5 +++++
 2 files changed, 24 insertions(+)
 create mode 100644 config/arch/loongarch.in
 create mode 100644 scripts/build/arch/loongarch.sh

diff --git a/config/arch/loongarch.in b/config/arch/loongarch.in
new file mode 100644
index 00000000..6218c33d
--- /dev/null
+++ b/config/arch/loongarch.in
@@ -0,0 +1,19 @@
+# LoongArch specific config options
+
+## no-package
+## depends on EXPERIMENTAL
+##
+## select ARCH_SUPPORTS_64
+## select ARCH_DEFAULT_64
+## select ARCH_SUPPORTS_BOTH_MMU
+## select ARCH_SUPPORTS_WITH_ABI
+## select ARCH_SUPPORTS_WITH_ARCH
+## select ARCH_SUPPORTS_WITH_TUNE
+## select GCC_REQUIRE_12_or_later
+## select BINUTILS_REQUIRE_2_39_or_later
+## select LINUX_REQUIRE_5_19_or_later
+## select GDB_REQUIRE_12_1_or_later if DEBUG_GDB
+## select GLIBC_REQUIRE_2_36_or_later if LIBC_GLIBC
+
+## help The LoongArch architecture, as defined by:
+## help     https://loongson.github.io/LoongArch-Documentation/README-EN.html
diff --git a/scripts/build/arch/loongarch.sh b/scripts/build/arch/loongarch.sh
new file mode 100644
index 00000000..2e981888
--- /dev/null
+++ b/scripts/build/arch/loongarch.sh
@@ -0,0 +1,5 @@
+# Compute LoongArch-specific values
+
+CT_DoArchTupleValues() {
+    CT_TARGET_ARCH="loongarch${CT_ARCH_BITNESS}"
+}