FlushCacheLine.c

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VOID *
EFIAPI
AsmFlushCacheLine (
  IN      VOID  *LinearAddress
  )
{
  //
  // If the CPU does not support CLFLUSH instruction,
  // then promote flush range to flush entire cache.
  //
  _asm {
    mov     eax, 1
    cpuid
    test    edx, BIT19
    jz      NoClflush
    mov     eax, dword ptr [LinearAddress]
    clflush [eax]
    jmp     Done
NoClflush:
    wbinvd
Done:
  }
 
  return LinearAddress;
}