From 37db86ae23021f345d583c7c9c3059e339083439 Mon Sep 17 00:00:00 2001 From: Pete Batard Date: Wed, 28 Mar 2018 23:55:20 +0800 Subject: [PATCH] MdePkg/Library/BaseSynchronizationLib: Enable VS2017/ARM64 builds Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Pete Batard Reviewed-by: Liming Gao --- .../AArch64/Synchronization.asm | 205 ++++++++++++++++++ .../BaseSynchronizationLib.inf | 3 +- 2 files changed, 207 insertions(+), 1 deletion(-) create mode 100644 MdePkg/Library/BaseSynchronizationLib/AArch64/Synchronization.asm diff --git a/MdePkg/Library/BaseSynchronizationLib/AArch64/Synchronization.asm b/MdePkg/Library/BaseSynchronizationLib/AArch64/Synchronization.asm new file mode 100644 index 0000000000..0b13b26621 --- /dev/null +++ b/MdePkg/Library/BaseSynchronizationLib/AArch64/Synchronization.asm @@ -0,0 +1,205 @@ +; Implementation of synchronization functions for ARM architecture (AArch64) +; +; Copyright (c) 2012-2015, ARM Limited. All rights reserved. +; Copyright (c) 2015, Linaro Limited. All rights reserved. +; +; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; + + EXPORT InternalSyncCompareExchange16 + EXPORT InternalSyncCompareExchange32 + EXPORT InternalSyncCompareExchange64 + EXPORT InternalSyncIncrement + EXPORT InternalSyncDecrement + AREA BaseSynchronizationLib_LowLevel, CODE, READONLY + +;/** +; Performs an atomic compare exchange operation on a 16-bit unsigned integer. +; +; Performs an atomic compare exchange operation on the 16-bit unsigned integer +; specified by Value. If Value is equal to CompareValue, then Value is set to +; ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue, +; then Value is returned. The compare exchange operation must be performed using +; MP safe mechanisms. +; +; @param Value A pointer to the 16-bit value for the compare exchange +; operation. +; @param CompareValue 16-bit value used in compare operation. +; @param ExchangeValue 16-bit value used in exchange operation. +; +; @return The original *Value before exchange. +; +;**/ +;UINT16 +;EFIAPI +;InternalSyncCompareExchange16 ( +; IN volatile UINT16 *Value, +; IN UINT16 CompareValue, +; IN UINT16 ExchangeValue +; ) +InternalSyncCompareExchange16 + uxth w1, w1 + uxth w2, w2 + dmb sy + +InternalSyncCompareExchange16Again + ldxrh w3, [x0] + cmp w3, w1 + bne InternalSyncCompareExchange16Fail + +InternalSyncCompareExchange16Exchange + stxrh w4, w2, [x0] + cbnz w4, InternalSyncCompareExchange16Again + +InternalSyncCompareExchange16Fail + dmb sy + mov w0, w3 + ret + +;/** +; Performs an atomic compare exchange operation on a 32-bit unsigned integer. +; +; Performs an atomic compare exchange operation on the 32-bit unsigned integer +; specified by Value. If Value is equal to CompareValue, then Value is set to +; ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue, +; then Value is returned. The compare exchange operation must be performed using +; MP safe mechanisms. +; +; @param Value A pointer to the 32-bit value for the compare exchange +; operation. +; @param CompareValue 32-bit value used in compare operation. +; @param ExchangeValue 32-bit value used in exchange operation. +; +; @return The original *Value before exchange. +; +;**/ +;UINT32 +;EFIAPI +;InternalSyncCompareExchange32 ( +; IN volatile UINT32 *Value, +; IN UINT32 CompareValue, +; IN UINT32 ExchangeValue +; ) +InternalSyncCompareExchange32 + dmb sy + +InternalSyncCompareExchange32Again + ldxr w3, [x0] + cmp w3, w1 + bne InternalSyncCompareExchange32Fail + +InternalSyncCompareExchange32Exchange + stxr w4, w2, [x0] + cbnz w4, InternalSyncCompareExchange32Again + +InternalSyncCompareExchange32Fail + dmb sy + mov w0, w3 + ret + +;/** +; Performs an atomic compare exchange operation on a 64-bit unsigned integer. +; +; Performs an atomic compare exchange operation on the 64-bit unsigned integer specified +; by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and +; CompareValue is returned. If Value is not equal to CompareValue, then Value is returned. +; The compare exchange operation must be performed using MP safe mechanisms. +; +; @param Value A pointer to the 64-bit value for the compare exchange +; operation. +; @param CompareValue 64-bit value used in compare operation. +; @param ExchangeValue 64-bit value used in exchange operation. +; +; @return The original *Value before exchange. +; +;**/ +;UINT64 +;EFIAPI +;InternalSyncCompareExchange64 ( +; IN volatile UINT64 *Value, +; IN UINT64 CompareValue, +; IN UINT64 ExchangeValue +; ) +InternalSyncCompareExchange64 + dmb sy + +InternalSyncCompareExchange64Again + ldxr x3, [x0] + cmp x3, x1 + bne InternalSyncCompareExchange64Fail + +InternalSyncCompareExchange64Exchange + stxr w4, x2, [x0] + cbnz w4, InternalSyncCompareExchange64Again + +InternalSyncCompareExchange64Fail + dmb sy + mov x0, x3 + ret + +;/** +; Performs an atomic increment of an 32-bit unsigned integer. +; +; Performs an atomic increment of the 32-bit unsigned integer specified by +; Value and returns the incremented value. The increment operation must be +; performed using MP safe mechanisms. The state of the return value is not +; guaranteed to be MP safe. +; +; @param Value A pointer to the 32-bit value to increment. +; +; @return The incremented value. +; +;**/ +;UINT32 +;EFIAPI +;InternalSyncIncrement ( +; IN volatile UINT32 *Value +; ) +InternalSyncIncrement + dmb sy +TryInternalSyncIncrement + ldxr w1, [x0] + add w1, w1, #1 + stxr w2, w1, [x0] + cbnz w2, TryInternalSyncIncrement + mov w0, w1 + dmb sy + ret + +;/** +; Performs an atomic decrement of an 32-bit unsigned integer. +; +; Performs an atomic decrement of the 32-bit unsigned integer specified by +; Value and returns the decrement value. The decrement operation must be +; performed using MP safe mechanisms. The state of the return value is not +; guaranteed to be MP safe. +; +; @param Value A pointer to the 32-bit value to decrement. +; +; @return The decrement value. +; +;**/ +;UINT32 +;EFIAPI +;InternalSyncDecrement ( +; IN volatile UINT32 *Value +; ) +InternalSyncDecrement + dmb sy +TryInternalSyncDecrement + ldxr w1, [x0] + sub w1, w1, #1 + stxr w2, w1, [x0] + cbnz w2, TryInternalSyncDecrement + mov w0, w1 + dmb sy + ret + + END diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf index 265de1341a..6fca7dd293 100755 --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf +++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf @@ -105,7 +105,8 @@ [Sources.AARCH64] Synchronization.c - AArch64/Synchronization.S + AArch64/Synchronization.S | GCC + AArch64/Synchronization.asm | MSFT [Packages] MdePkg/MdePkg.dec -- 2.39.2