diff options
Diffstat (limited to 'MdePkg/Library')
-rwxr-xr-x | MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf | 5 | ||||
-rw-r--r-- | MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.S | 78 |
2 files changed, 83 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf index 446bc19b63..83d5b8ed7c 100755 --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf +++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf @@ -3,6 +3,7 @@ #
# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -78,6 +79,10 @@ AArch64/Synchronization.S | GCC
AArch64/Synchronization.asm | MSFT
+[Sources.RISCV64]
+ Synchronization.c
+ RiscV64/Synchronization.S
+
[Packages]
MdePkg/MdePkg.dec
diff --git a/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.S b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.S new file mode 100644 index 0000000000..bac80d6871 --- /dev/null +++ b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.S @@ -0,0 +1,78 @@ +//------------------------------------------------------------------------------
+//
+// RISC-V synchronization functions.
+//
+// Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+//------------------------------------------------------------------------------
+#include <Base.h>
+
+.data
+
+.text
+.align 3
+
+.global ASM_PFX(InternalSyncCompareExchange32)
+.global ASM_PFX(InternalSyncCompareExchange64)
+.global ASM_PFX(InternalSyncIncrement)
+.global ASM_PFX(InternalSyncDecrement)
+
+//
+// ompare and xchange a 32-bit value.
+//
+// @param a0 : Pointer to 32-bit value.
+// @param a1 : Compare value.
+// @param a2 : Exchange value.
+//
+ASM_PFX (InternalSyncCompareExchange32):
+ lr.w a3, (a0) // Load the value from a0 and make
+ // the reservation of address.
+ bne a3, a1, exit
+ sc.w a3, a2, (a0) // Write the value back to the address.
+ mv a3, a1
+exit:
+ mv a0, a3
+ ret
+
+.global ASM_PFX(InternalSyncCompareExchange64)
+
+//
+// Compare and xchange a 64-bit value.
+//
+// @param a0 : Pointer to 64-bit value.
+// @param a1 : Compare value.
+// @param a2 : Exchange value.
+//
+ASM_PFX (SyncCompareExchange64):
+ lr.d a3, (a0) // Load the value from a0 and make
+ // the reservation of address.
+ bne a3, a1, exit
+ sc.d a3, a2, (a0) // Write the value back to the address.
+ mv a3, a1
+exit2:
+ mv a0, a3
+ ret
+
+//
+// Performs an atomic increment of an 32-bit unsigned integer.
+//
+// @param a0 : Pointer to 32-bit value.
+//
+ASM_PFX (InternalSyncIncrement):
+ li a1, 1
+ amoadd.w a2, a1, (a0)
+ mv a0, a2
+ ret
+
+//
+// Performs an atomic decrement of an 32-bit unsigned integer.
+//
+// @param a0 : Pointer to 32-bit value.
+//
+ASM_PFX (InternalSyncDecrement):
+ li a1, -1
+ amoadd.w a2, a1, (a0)
+ mv a0, a2
+ ret
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