diff options
Diffstat (limited to 'MdePkg/Library/BaseRngLib/AArch64/ArmReadIdIsar0.asm')
-rw-r--r-- | MdePkg/Library/BaseRngLib/AArch64/ArmReadIdIsar0.asm | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseRngLib/AArch64/ArmReadIdIsar0.asm b/MdePkg/Library/BaseRngLib/AArch64/ArmReadIdIsar0.asm new file mode 100644 index 0000000000..1d9f9a808c --- /dev/null +++ b/MdePkg/Library/BaseRngLib/AArch64/ArmReadIdIsar0.asm @@ -0,0 +1,30 @@ +;------------------------------------------------------------------------------
+;
+; ArmReadIdIsar0() for AArch64
+;
+; Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
+;
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+ EXPORT ArmReadIdIsar0
+ AREA BaseLib_LowLevel, CODE, READONLY
+
+;/**
+; Reads the ID_AA64ISAR0 Register.
+;
+; @return The contents of the ID_AA64ISAR0 register.
+;
+;**/
+;UINT64
+;EFIAPI
+;ArmReadIdIsar0 (
+; VOID
+; );
+;
+ArmReadIdIsar0
+ mrs x0, id_aa64isar0_el1 // Read ID_AA64ISAR0 Register
+ ret
+
+ END
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