[PATCH v2 27/34] MdePkg/BaseCpuLib: LoongArch Base CPU library implementation.

["Chao Li" <lichao@loongson.cn>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4053

Implement LoongArch CPU related functions in BaseCpuLib.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

Signed-off-by: Chao Li <lichao@loongson.cn>
---
 MdePkg/Library/BaseCpuLib/BaseCpuLib.inf          |  7 ++++++-
 MdePkg/Library/BaseCpuLib/BaseCpuLib.uni          |  5 +++--
 MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S | 15 +++++++++++++++
 MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S    | 15 +++++++++++++++
 4 files changed, 39 insertions(+), 3 deletions(-)
 create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
 create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S

diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
index c4cd29a783..6b230f6e6d 100644
--- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
+++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
@@ -8,6 +8,7 @@
 #  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
 #  Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
 #  Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+#  Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -25,7 +26,7 @@
 
 
 #
-#  VALID_ARCHITECTURES           = IA32 X64 EBC ARM AARCH64 RISCV64
+#  VALID_ARCHITECTURES           = IA32 X64 EBC ARM AARCH64 RISCV64 LOONGARCH64
 #
 
 [Sources.IA32]
@@ -61,6 +62,10 @@
 [Sources.RISCV64]
   RiscV/Cpu.S
 
+[Sources.LOONGARCH64]
+  LoongArch/CpuFlushTlb.S | GCC
+  LoongArch/CpuSleep.S    | GCC
+
 [Packages]
   MdePkg/MdePkg.dec
 
diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni b/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
index 80dc495786..7c5c8dfb37 100644
--- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
+++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
@@ -1,13 +1,14 @@
 // /** @file
 // Instance of CPU Library for various architecture.
 //
-// CPU Library implemented using ASM functions for IA-32, X64 and RISCV64,
+// CPU Library implemented using ASM functions for IA-32, X64, RISCV64 and LoongArch64,
 // PAL CALLs for IPF, and empty functions for EBC.
 //
 // Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
 // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
 // Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
 // Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+// Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
 //
 // SPDX-License-Identifier: BSD-2-Clause-Patent
 //
@@ -16,5 +17,5 @@
 
 #string STR_MODULE_ABSTRACT             #language en-US "Instance of CPU Library for various architectures"
 
-#string STR_MODULE_DESCRIPTION          #language en-US "CPU Library implemented using ASM functions for IA-32, X64 and RISCV64, PAL CALLs for IPF, and empty functions for EBC."
+#string STR_MODULE_DESCRIPTION          #language en-US "CPU Library implemented using ASM functions for IA-32, X64, RISCV64 and LoongArch64, PAL CALLs for IPF, and empty functions for EBC."
 
diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S b/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
new file mode 100644
index 0000000000..8b792f0a37
--- /dev/null
+++ b/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
@@ -0,0 +1,15 @@
+#------------------------------------------------------------------------------
+#
+# CpuFlushTlb() for LoongArch64
+#
+# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(CpuFlushTlb)
+
+ASM_PFX(CpuFlushTlb):
+  tlbflush
+  jirl $zero, $ra, 0
+  .end
diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S b/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S
new file mode 100644
index 0000000000..eb31b10714
--- /dev/null
+++ b/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S
@@ -0,0 +1,15 @@
+#------------------------------------------------------------------------------
+#
+# CpuSleep() for LoongArch64
+#
+# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(CpuSleep)
+
+ASM_PFX(CpuSleep):
+  idle 0
+  jirl $zero, $ra, 0
+  .end
-- 
2.27.0