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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c new file mode 100644 index 00000000..ee9d6a4a --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c @@ -0,0 +1,200 @@ +/** @file + GCC inline implementation of BaseSynchronizationLib processor specific functions. + + Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> + Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + + + +/** + 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. + + @param Value A pointer to the 32-bit value to increment. + + @return The incremented value. + +**/ +UINT32 +EFIAPI +InternalSyncIncrement ( + IN volatile UINT32 *Value + ) +{ + UINT32 Result; + + __asm__ __volatile__ ( + "movl $1, %%eax \n\t" + "lock \n\t" + "xadd %%eax, %1 \n\t" + "inc %%eax \n\t" + : "=&a" (Result), // %0 + "+m" (*Value) // %1 + : // no inputs that aren't also outputs + : "memory", + "cc" + ); + + return Result; +} + + +/** + 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 decremented value. The decrement operation must be + performed using MP safe mechanisms. + + @param Value A pointer to the 32-bit value to decrement. + + @return The decremented value. + +**/ +UINT32 +EFIAPI +InternalSyncDecrement ( + IN volatile UINT32 *Value + ) +{ + UINT32 Result; + + __asm__ __volatile__ ( + "movl $-1, %%eax \n\t" + "lock \n\t" + "xadd %%eax, %1 \n\t" + "dec %%eax \n\t" + : "=&a" (Result), // %0 + "+m" (*Value) // %1 + : // no inputs that aren't also outputs + : "memory", + "cc" + ); + + return Result; +} + + +/** + 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 OUT volatile UINT16 *Value, + IN UINT16 CompareValue, + IN UINT16 ExchangeValue + ) +{ + __asm__ __volatile__ ( + "lock \n\t" + "cmpxchgw %2, %1 \n\t" + : "+a" (CompareValue), // %0 + "+m" (*Value) // %1 + : "r" (ExchangeValue) // %2 + : "memory", + "cc" + ); + + return CompareValue; +} + + +/** + 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 OUT volatile UINT32 *Value, + IN UINT32 CompareValue, + IN UINT32 ExchangeValue + ) +{ + __asm__ __volatile__ ( + "lock \n\t" + "cmpxchgl %2, %1 \n\t" + : "+a" (CompareValue), // %0 + "+m" (*Value) // %1 + : "r" (ExchangeValue) // %2 + : "memory", + "cc" + ); + + return CompareValue; +} + + +/** + 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 OUT volatile UINT64 *Value, + IN UINT64 CompareValue, + IN UINT64 ExchangeValue + ) +{ + __asm__ __volatile__ ( + "lock \n\t" + "cmpxchgq %2, %1 \n\t" + : "+a" (CompareValue), // %0 + "+m" (*Value) // %1 + : "r" (ExchangeValue) // %2 + : "memory", + "cc" + ); + + return CompareValue; +} |