Documentation: LoongArch: Add basic documentations

Add some basic documentation for LoongArch. LoongArch is a new RISC ISA, which is a bit like MIPS or RISC-V. LoongArch includes a reduced 32-bit version (LA32R), a standard 32-bit version (LA32S) and a 64-bit version (LA64). Tested-by: Bagas Sanjaya <bagasdotme@gmail.com> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Co-developed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
mariux64 · Jun 3, 2022 · 0ea8ce6 · 0ea8ce6
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diff --git a/Documentation/arch.rst b/Documentation/arch.rst
@@ -13,6 +13,7 @@ implementation.
    arm/index
    arm64/index
    ia64/index
+   loongarch/index
    m68k/index
    mips/index
    nios2/index

diff --git a/Documentation/loongarch/features.rst b/Documentation/loongarch/features.rst
@@ -0,0 +1,3 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. kernel-feat:: $srctree/Documentation/features loongarch
diff --git a/Documentation/loongarch/index.rst b/Documentation/loongarch/index.rst
@@ -0,0 +1,21 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+======================
+LoongArch Architecture
+======================
+
+.. toctree::
+   :maxdepth: 2
+   :numbered:
+
+   introduction
+   irq-chip-model
+
+   features
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`