diff options
Diffstat (limited to 'MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.asm')
| -rw-r--r-- | MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.asm | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.asm b/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.asm deleted file mode 100644 index 1c9a183b8f..0000000000 --- a/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.asm +++ /dev/null @@ -1,214 +0,0 @@ -// Implementation of synchronization functions for ARM architecture
-//
-// 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 ArmSynchronization, 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
- dmb
-
-InternalSyncCompareExchange16Again
- ldrexh r3, [r0]
- cmp r3, r1
- bne InternalSyncCompareExchange16Fail
-
-InternalSyncCompareExchange16Exchange
- strexh ip, r2, [r0]
- cmp ip, #0
- bne InternalSyncCompareExchange16Again
-
-InternalSyncCompareExchange16Fail
- dmb
- mov r0, r3
- bx lr
-
-/**
- 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
-
-InternalSyncCompareExchange32Again
- ldrex r3, [r0]
- cmp r3, r1
- bne InternalSyncCompareExchange32Fail
-
-InternalSyncCompareExchange32Exchange
- strex ip, r2, [r0]
- cmp ip, #0
- bne InternalSyncCompareExchange32Again
-
-InternalSyncCompareExchange32Fail
- dmb
- mov r0, r3
- bx lr
-
-/**
- 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, // r0
-// IN UINT64 CompareValue, // r2-r3
-// IN UINT64 ExchangeValue // stack
-// )
-InternalSyncCompareExchange64
- push { r4-r7 }
- ldrd r4, r5, [sp, #16]
- dmb
-
-InternalSyncCompareExchange64Again
- ldrexd r6, r7, [r0]
- cmp r6, r2
- cmpeq r7, r3
- bne InternalSyncCompareExchange64Fail
-
-InternalSyncCompareExchange64Exchange
- strexd ip, r4, r5, [r0]
- cmp ip, #0
- bne InternalSyncCompareExchange64Again
-
-InternalSyncCompareExchange64Fail
- dmb
- mov r0, r6
- mov r1, r7
- pop { r4-r7 }
- bx lr
-
-/**
- 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
-TryInternalSyncIncrement
- ldrex r1, [r0]
- add r1, r1, #1
- strex r2, r1, [r0]
- cmp r2, #0
- bne TryInternalSyncIncrement
- dmb
- mov r0, r1
- bx lr
-
-/**
- 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
-TryInternalSyncDecrement
- ldrex r1, [r0]
- sub r1, r1, #1
- strex r2, r1, [r0]
- cmp r2, #0
- bne TryInternalSyncDecrement
- dmb
- mov r0, r1
- bx lr
-
- END
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