2 files changed, 48 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/BaseRiscVFpuLib/BaseRiscVFpuLib.inf b/UefiCpuPkg/Library/BaseRiscVFpuLib/BaseRiscVFpuLib.inf
new file mode 100644
index 0000000000..8130430310
--- /dev/null
+++ b/UefiCpuPkg/Library/BaseRiscVFpuLib/BaseRiscVFpuLib.inf
@@ -0,0 +1,26 @@
+## @file
+#  RISC-V FPU library.
+#
+#  Copyright (c) 2024, Canonical Services Ltd
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION         = 0x0001001b
+  BASE_NAME           = BaseRiscVFpuLib
+  FILE_GUID           = e600fe4d-8595-40f3-90a0-5f043ce155c2
+  MODULE_TYPE         = BASE
+  VERSION_STRING      = 1.0
+  LIBRARY_CLASS       = RiscVFpuLib
+
+[Sources]
+  RiscVFpuCore.S
+
+[Packages]
+  MdePkg/MdePkg.dec
+  UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+  BaseLib
diff --git a/UefiCpuPkg/Library/BaseRiscVFpuLib/RiscVFpuCore.S b/UefiCpuPkg/Library/BaseRiscVFpuLib/RiscVFpuCore.S
new file mode 100644
index 0000000000..b439af4e42
--- /dev/null
+++ b/UefiCpuPkg/Library/BaseRiscVFpuLib/RiscVFpuCore.S
@@ -0,0 +1,22 @@
+/** @file
+*
+*  Copyright (c) 2024, Canonical Services Ltd
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Library/BaseRiscVFpuLib.h>
+#include <Register/RiscV64/RiscVImpl.h>
+
+//
+// Initialize floating point unit
+//
+ASM_FUNC (RiscVInitializeFpu)
+  csrr  a0, CSR_SSTATUS
+  li    a1, MSTATUS_FS
+  or    a0, a0, a1
+  csrw  CSR_SSTATUS, a0
+  csrw  CSR_FCSR, x0
+  li    a0, 0
+  ret