diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/RiscV64/ReadTimer.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/RiscV64/ReadTimer.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/RiscV64/ReadTimer.S b/MdePkg/Library/BaseLib/RiscV64/ReadTimer.S new file mode 100644 index 0000000000..39a06efa51 --- /dev/null +++ b/MdePkg/Library/BaseLib/RiscV64/ReadTimer.S @@ -0,0 +1,23 @@ +//------------------------------------------------------------------------------
+//
+// Read CPU timer
+//
+// Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+//------------------------------------------------------------------------------
+
+#include <Register/RiscV64/RiscVImpl.h>
+
+.data
+.align 3
+.section .text
+
+//
+// Read TIME CSR.
+// @retval a0 : 64-bit timer.
+//
+ASM_FUNC (RiscVReadTimer)
+ csrr a0, CSR_TIME
+ ret
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