flush.c File Reference

#include "ki.h"

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Functions
VOID	KeInvalidateAllCachesTarget (IN PKIPI_CONTEXT SignalDone, IN PVOID Parameter1, IN PVOID Parameter2, IN PVOID Parameter3)
BOOLEAN	KeInvalidateAllCaches (IN BOOLEAN AllProcessors)
Variables
ULONG	KeI386CpuType

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Function Documentation

BOOLEAN KeInvalidateAllCaches (  IN BOOLEAN  AllProcessors  )

Definition at line 187 of file i386/flush.c. References _KPROCESS::ActiveProcessors, FALSE, KeActiveProcessors, KeGetCurrentPrcb, KeI386CpuType, KeInvalidateAllCachesTarget(), KiIpiStallOnPacketTargets(), KiLockContextSwap, KiUnlockContextSwap, NULL, and TRUE. Referenced by MiMapLockedPagesInUserSpace(), MiMapSinglePage(), MiMapViewOfPhysicalSection(), MmMapIoSpace(), and MmMapLockedPagesSpecifyCache(). : This function writes back and invalidates the cache on all processors that are currently running threads which are children of the current process or on all processors in the host configuration. Arguments: AllProcessors - Supplies a boolean value that determines which data caches are flushed. Return Value: TRUE if the invalidation was done, FALSE otherwise. --*/ { PKPRCB Prcb; PKPROCESS Process; KIRQL OldIrql; KAFFINITY TargetProcessors; // // Support for wbinvd on Pentium based platforms is vendor dependent. // Check for family first and support on Pentium Pro based platforms // onward. // if (KeI386CpuType < 6 ) { return FALSE; } #ifndef NT_UP // // Compute target set of processors. // KiLockContextSwap(&OldIrql); Prcb = KeGetCurrentPrcb(); if (AllProcessors) { TargetProcessors = KeActiveProcessors; } else { Process = Prcb->CurrentThread->ApcState.Process; TargetProcessors = Process->ActiveProcessors; } TargetProcessors &= ~Prcb->SetMember; // // If any target processors are specified, then send writeback // invalidate packet to the target set of processors. // if (TargetProcessors != 0) { KiIpiSendSynchronousPacket(Prcb, TargetProcessors, KeInvalidateAllCachesTarget, (PVOID)&Prcb->ReverseStall, NULL, NULL); KiIpiStallOnPacketTargets(TargetProcessors); } // // All target processors have written back and invalidated caches and // are waiting to proceed. Write back invalidate current cache and // then continue the execution of target processors. // #endif _asm { ; ; wbinvd ; _emit 0Fh _emit 09h } #ifndef NT_UP // // Wait until all target processors have finished and completed packet. // if (TargetProcessors != 0) { Prcb->ReverseStall += 1; } // // Release the context swap lock. // KiUnlockContextSwap(OldIrql); #endif return TRUE; }

VOID KeInvalidateAllCachesTarget (  IN PKIPI_CONTEXT  SignalDone, IN PVOID  Parameter1, IN PVOID  Parameter2, IN PVOID  Parameter3 )

Definition at line 292 of file i386/flush.c. Referenced by KeInvalidateAllCaches(). 00300 : 00301 00302 This is the target function for writing back and invalidating the cache. 00303 00304 Arguments: 00305 00306 SignalDone - Supplies a pointer to a variable that is cleared when the 00307 requested operation has been performed. 00308 00309 Proceed - pointer to flag to syncronize with 00310 00311 Return Value: 00312 00313 None. 00314 00315 --*/ 00316 { 00317 // 00318 // Write back invalidate current cache 00319 // 00320 00321 _asm { 00322 ; 00323 ; wbinvd 00324 ; 00325 00326 _emit 0Fh 00327 _emit 09h 00328 00329 } 00330 00331 KiIpiSignalPacketDoneAndStall (SignalDone, Proceed); 00332 } }

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Variable Documentation

ULONG KeI386CpuType

Definition at line 41 of file i386/flush.c.

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