テクニカル ドキュメント #125

BOOL __cdecl KP_XXX_IntAtIrql(PVOID pIntContext, BOOL *pfIsMyInterrupt)
{
    XXX_HANDLE hXXX = (XXX_HANDLE) pIntContext;
    DWORD data = 0;
    PVOID pData = NULL;
    DWORD addrSpace;
    WD_ITEMS *pItem;

    addrSpace = XXX_INTCSR_SPACE;
    pItem = &hXXX->cardReg.Card.Item[hXXX->addrDesc[addrSpace].index];
    pData = (DWORD*)pItem->I.Mem.dwTransAddr;
    (DWORD)pData += XXX_INTCSR_OFFSET; 
    data = dtoh32(*((DWORD*)pData));

    if (data == 0xFF)  // The interrupt was generated by our hardware
    {
        // Write 0x0 to INTCSR to acknowledge the interrupt
        *((DWORD*)pData) = dtoh32(data);
        
        // Accept control of the interrupt
        *pfIsMyInterrupt = TRUE; 
        
        // Schedule deferred interrupt processing (KP_IntAtDpc())
        return TRUE;
     }
    else
    {	
        // (Do not acknowledge the interrupt)

        // Do not accept control of the interrupt		
        *pfIsMyInterrupt = FALSE;
        
        // Do not schedule deferred interrupt processing	
        return FALSE;
    }
}