diff options
| -rw-r--r-- | MdePkg/Library/BaseLib/BaseLib.msa | 5 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/SynchronizationGcc.c (renamed from MdePkg/Library/BaseLib/Synchronization.c) | 38 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/SynchronizationMsc.c | 368 |
3 files changed, 392 insertions, 19 deletions
diff --git a/MdePkg/Library/BaseLib/BaseLib.msa b/MdePkg/Library/BaseLib/BaseLib.msa index 99ba05a870..7e1690fefa 100644 --- a/MdePkg/Library/BaseLib/BaseLib.msa +++ b/MdePkg/Library/BaseLib/BaseLib.msa @@ -42,7 +42,6 @@ <Filename>BaseLibInternals.h</Filename> <Filename>String.c</Filename> <Filename>LinkedList.c</Filename> - <Filename>Synchronization.c</Filename> <Filename>Cpu.c</Filename> <Filename>CpuDeadLoop.c</Filename> <Filename>BitField.c</Filename> @@ -73,7 +72,9 @@ <Filename>SwapBytes32.c</Filename> <Filename>SwapBytes64.c</Filename> <Filename>SwitchStack.c</Filename> - <Filename>CheckSum.c</Filename> + <Filename>CheckSum.c</Filename> + <Filename ToolChainFamily="GCC">SynchronizationGcc.c</Filename> + <Filename ToolChainFamily="MSFT">SynchronizationMsc.c</Filename> <Filename SupArchList="IA32">x86DisablePaging32.c</Filename> <Filename SupArchList="IA32">x86DisablePaging64.c</Filename> <Filename SupArchList="IA32">x86EnablePaging32.c</Filename> diff --git a/MdePkg/Library/BaseLib/Synchronization.c b/MdePkg/Library/BaseLib/SynchronizationGcc.c index 59919a7f03..9d57a1f34d 100644 --- a/MdePkg/Library/BaseLib/Synchronization.c +++ b/MdePkg/Library/BaseLib/SynchronizationGcc.c @@ -1,7 +1,7 @@ /** @file
Implementation of synchronization functions.
- Copyright (c) 2006, Intel Corporation<BR>
+ Copyright (c) 2006 - 2007, Intel Corporation<BR>
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
@@ -10,16 +10,17 @@ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
- Module Name: Synchronization.c
+ Module Name: SynchronizationGcc.c
**/
#include "BaseLibInternals.h"
//
-// SPIN_LOCK_RELEASED & SPIN_LOCK_ACQUIRED should belong to type "SPIN_LOCK".
-// Here we use type-case "UINTN" to avoid "volatile" modifier on const integers.
+// GCC inline assembly for Read Write Barrier
//
+#define _ReadWriteBarrier() do { asm volatile ("": : : "memory"); } while(0)
+
#define SPIN_LOCK_RELEASED ((UINTN) 1)
#define SPIN_LOCK_ACQUIRED ((UINTN) 2)
@@ -72,7 +73,11 @@ InitializeSpinLock ( )
{
ASSERT (SpinLock != NULL);
+
+ _ReadWriteBarrier();
*SpinLock = SPIN_LOCK_RELEASED;
+ _ReadWriteBarrier();
+
return SpinLock;
}
@@ -155,20 +160,20 @@ AcquireSpinLockOrFail ( IN OUT SPIN_LOCK *SpinLock
)
{
- SPIN_LOCK LockValue;
-
+ VOID *Result;
+
ASSERT (SpinLock != NULL);
+ ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
- LockValue = *SpinLock;
- ASSERT (LockValue == SPIN_LOCK_ACQUIRED || LockValue == SPIN_LOCK_RELEASED);
-
- return (BOOLEAN)(
- InterlockedCompareExchangePointer (
+ _ReadWriteBarrier ();
+ Result = InterlockedCompareExchangePointer (
(VOID**)SpinLock,
(VOID*)SPIN_LOCK_RELEASED,
(VOID*)SPIN_LOCK_ACQUIRED
- ) == (VOID*)SPIN_LOCK_RELEASED
);
+
+ _ReadWriteBarrier ();
+ return (BOOLEAN) (Result == (VOID*) SPIN_LOCK_RELEASED);
}
/**
@@ -191,14 +196,13 @@ ReleaseSpinLock ( IN OUT SPIN_LOCK *SpinLock
)
{
- SPIN_LOCK LockValue;
-
ASSERT (SpinLock != NULL);
+ ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
- LockValue = *SpinLock;
- ASSERT (LockValue == SPIN_LOCK_ACQUIRED || LockValue == SPIN_LOCK_RELEASED);
-
+ _ReadWriteBarrier ();
*SpinLock = SPIN_LOCK_RELEASED;
+ _ReadWriteBarrier ();
+
return SpinLock;
}
diff --git a/MdePkg/Library/BaseLib/SynchronizationMsc.c b/MdePkg/Library/BaseLib/SynchronizationMsc.c new file mode 100644 index 0000000000..fb10b5d01b --- /dev/null +++ b/MdePkg/Library/BaseLib/SynchronizationMsc.c @@ -0,0 +1,368 @@ +/** @file
+ Implementation of synchronization functions.
+
+ Copyright (c) 2006 - 2007, Intel Corporation<BR>
+ 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.
+
+ Module Name: SynchronizationMsc.c
+
+**/
+
+#include "BaseLibInternals.h"
+
+//
+// Microsoft Visual Studio 7.1 Function Prototypes for read write barrier Intrinsics
+//
+void _ReadWriteBarrier (void);
+#pragma intrinsic(_ReadWriteBarrier)
+
+
+#define SPIN_LOCK_RELEASED ((UINTN) 1)
+#define SPIN_LOCK_ACQUIRED ((UINTN) 2)
+
+/**
+ Retrieves the architecture specific spin lock alignment requirements for
+ optimal spin lock performance.
+
+ This function retrieves the spin lock alignment requirements for optimal
+ performance on a given CPU architecture. The spin lock alignment must be a
+ power of two and is returned by this function. If there are no alignment
+ requirements, then 1 must be returned. The spin lock synchronization
+ functions must function correctly if the spin lock size and alignment values
+ returned by this function are not used at all. These values are hints to the
+ consumers of the spin lock synchronization functions to obtain optimal spin
+ lock performance.
+
+ @return The architecture specific spin lock alignment.
+
+**/
+UINTN
+EFIAPI
+GetSpinLockProperties (
+ VOID
+ )
+{
+ // @bug May use a PCD entry to determine this alignment.
+ return 32;
+}
+
+/**
+ Initializes a spin lock to the released state and returns the spin lock.
+
+ This function initializes the spin lock specified by SpinLock to the released
+ state, and returns SpinLock. Optimal performance can be achieved by calling
+ GetSpinLockProperties() to determine the size and alignment requirements for
+ SpinLock.
+
+ If SpinLock is NULL, then ASSERT().
+
+ @param SpinLock A pointer to the spin lock to initialize to the released
+ state.
+
+ @return SpinLock
+
+**/
+SPIN_LOCK *
+EFIAPI
+InitializeSpinLock (
+ OUT SPIN_LOCK *SpinLock
+ )
+{
+ ASSERT (SpinLock != NULL);
+
+ _ReadWriteBarrier();
+ *SpinLock = SPIN_LOCK_RELEASED;
+ _ReadWriteBarrier();
+
+ return SpinLock;
+}
+
+/**
+ Waits until a spin lock can be placed in the acquired state.
+
+ This function checks the state of the spin lock specified by SpinLock. If
+ SpinLock is in the released state, then this function places SpinLock in the
+ acquired state and returns SpinLock. Otherwise, this function waits
+ indefinitely for the spin lock to be released, and then places it in the
+ acquired state and returns SpinLock. All state transitions of SpinLock must
+ be performed using MP safe mechanisms.
+
+ If SpinLock is NULL, then ASSERT().
+ If SpinLock was not initialized with InitializeSpinLock(), then ASSERT().
+ If PcdSpinLockTimeout is not zero, and SpinLock is can not be acquired in
+ PcdSpinLockTimeout microseconds, then ASSERT().
+
+ @param SpinLock A pointer to the spin lock to place in the acquired state.
+
+ @return SpinLock
+
+**/
+SPIN_LOCK *
+EFIAPI
+AcquireSpinLock (
+ IN OUT SPIN_LOCK *SpinLock
+ )
+{
+ UINT64 Tick;
+ UINT64 Start, End;
+ UINT64 Timeout;
+
+ Tick = 0;
+ Start = 0;
+ End = 0;
+ if (PcdGet32 (PcdSpinLockTimeout) > 0) {
+ Tick = GetPerformanceCounter ();
+ Timeout = DivU64x32 (
+ MultU64x32 (
+ GetPerformanceCounterProperties (&Start, &End),
+ PcdGet32 (PcdSpinLockTimeout)
+ ),
+ 1000000
+ );
+ if (Start < End) {
+ Tick += Timeout;
+ } else {
+ Tick -= Timeout;
+ }
+ }
+
+ while (!AcquireSpinLockOrFail (SpinLock)) {
+ CpuPause ();
+ ASSERT ((Start < End) ^ (Tick <= GetPerformanceCounter ()));
+ }
+ return SpinLock;
+}
+
+/**
+ Attempts to place a spin lock in the acquired state.
+
+ This function checks the state of the spin lock specified by SpinLock. If
+ SpinLock is in the released state, then this function places SpinLock in the
+ acquired state and returns TRUE. Otherwise, FALSE is returned. All state
+ transitions of SpinLock must be performed using MP safe mechanisms.
+
+ If SpinLock is NULL, then ASSERT().
+ If SpinLock was not initialized with InitializeSpinLock(), then ASSERT().
+
+ @param SpinLock A pointer to the spin lock to place in the acquired state.
+
+ @retval TRUE SpinLock was placed in the acquired state.
+ @retval FALSE SpinLock could not be acquired.
+
+**/
+BOOLEAN
+EFIAPI
+AcquireSpinLockOrFail (
+ IN OUT SPIN_LOCK *SpinLock
+ )
+{
+ VOID *Result;
+
+ ASSERT (SpinLock != NULL);
+ ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
+
+ _ReadWriteBarrier ();
+ Result = InterlockedCompareExchangePointer (
+ (VOID**)SpinLock,
+ (VOID*)SPIN_LOCK_RELEASED,
+ (VOID*)SPIN_LOCK_ACQUIRED
+ );
+
+ _ReadWriteBarrier ();
+ return (BOOLEAN) (Result == (VOID*) SPIN_LOCK_RELEASED);
+}
+
+/**
+ Releases a spin lock.
+
+ This function places the spin lock specified by SpinLock in the release state
+ and returns SpinLock.
+
+ If SpinLock is NULL, then ASSERT().
+ If SpinLock was not initialized with InitializeSpinLock(), then ASSERT().
+
+ @param SpinLock A pointer to the spin lock to release.
+
+ @return SpinLock
+
+**/
+SPIN_LOCK *
+EFIAPI
+ReleaseSpinLock (
+ IN OUT SPIN_LOCK *SpinLock
+ )
+{
+ ASSERT (SpinLock != NULL);
+ ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
+
+ _ReadWriteBarrier ();
+ *SpinLock = SPIN_LOCK_RELEASED;
+ _ReadWriteBarrier ();
+
+ return SpinLock;
+}
+
+/**
+ 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.
+
+ If Value is NULL, then ASSERT().
+
+ @param Value A pointer to the 32-bit value to increment.
+
+ @return The incremented value.
+
+**/
+UINT32
+EFIAPI
+InterlockedIncrement (
+ IN UINT32 *Value
+ )
+{
+ ASSERT (Value != NULL);
+ return InternalSyncIncrement (Value);
+}
+
+/**
+ 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. The state of the return value is not
+ guaranteed to be MP safe.
+
+ If Value is NULL, then ASSERT().
+
+ @param Value A pointer to the 32-bit value to decrement.
+
+ @return The decremented value.
+
+**/
+UINT32
+EFIAPI
+InterlockedDecrement (
+ IN UINT32 *Value
+ )
+{
+ ASSERT (Value != NULL);
+ return InternalSyncDecrement (Value);
+}
+
+/**
+ 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.
+
+ If Value is NULL, then ASSERT().
+
+ @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
+InterlockedCompareExchange32 (
+ IN OUT UINT32 *Value,
+ IN UINT32 CompareValue,
+ IN UINT32 ExchangeValue
+ )
+{
+ ASSERT (Value != NULL);
+ return InternalSyncCompareExchange32 (Value, CompareValue, ExchangeValue);
+}
+
+/**
+ 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.
+
+ If Value is NULL, then ASSERT().
+
+ @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
+InterlockedCompareExchange64 (
+ IN OUT UINT64 *Value,
+ IN UINT64 CompareValue,
+ IN UINT64 ExchangeValue
+ )
+{
+ ASSERT (Value != NULL);
+ return InternalSyncCompareExchange64 (Value, CompareValue, ExchangeValue);
+}
+
+/**
+ Performs an atomic compare exchange operation on a pointer value.
+
+ Performs an atomic compare exchange operation on the pointer value 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.
+
+ If Value is NULL, then ASSERT().
+
+ @param Value A pointer to the pointer value for the compare exchange
+ operation.
+ @param CompareValue Pointer value used in compare operation.
+ @param ExchangeValue Pointer value used in exchange operation.
+
+**/
+VOID *
+EFIAPI
+InterlockedCompareExchangePointer (
+ IN OUT VOID **Value,
+ IN VOID *CompareValue,
+ IN VOID *ExchangeValue
+ )
+{
+ UINT8 SizeOfValue;
+
+ SizeOfValue = sizeof (*Value);
+
+ switch (SizeOfValue) {
+ case sizeof (UINT32):
+ return (VOID*)(UINTN)InterlockedCompareExchange32 (
+ (UINT32*)Value,
+ (UINT32)(UINTN)CompareValue,
+ (UINT32)(UINTN)ExchangeValue
+ );
+ case sizeof (UINT64):
+ return (VOID*)(UINTN)InterlockedCompareExchange64 (
+ (UINT64*)Value,
+ (UINT64)(UINTN)CompareValue,
+ (UINT64)(UINTN)ExchangeValue
+ );
+ default:
+ ASSERT (FALSE);
+ return NULL;
+ }
+}
|