#include <mkfuncs.h>
#include <giisr.h>
// InstallIsr is a flag that indicates that there is an ISR to be installed.
//        IsrDll is the ISR DLL name, obtained from the registry.
//        IsrHandler is the ISR function name, obtained from the registry.
//        IfcType is the bus interface type, obtained from the registry.
//        BusNumber is the PCI bus number, obtained from the registry.

// Install ISR handler if there is one.
if (InstallIsr) {
    // Install ISR handler
    g_IsrHandle = LoadIntChainHandler(IsrDll, IsrHandler, (BYTE)Irq);

    if (!g_IsrHandle) {
        DEBUGMSG(ZONE_ERROR, (L"WAVEDEV: Couldn't install ISR handler\r\n"));
    } else {
        GIISR_INFO Info;
        PVOID PhysAddr;
        DWORD inIoSpace = 1;    // io space
        PHYSICAL_ADDRESS PortAddress = {ulIoBase, 0}; 

        if (!TransBusAddrToStatic(PCIBus, 0, PortAddress, ulIoLen, &inIoSpace, &PhysAddr)) {
            DEBUGMSG(ZONE_ERROR, (L"WAVEDEV: Failed TransBusAddrToStatic\r\n"));
            return FALSE;
        }

        DEBUGMSG(ZONE_PDD, (L"WAVEDEV: Installed ISR handler, Dll = '%s', Handler = '%s', Irq = %d, PhysAddr = 0x%x\r\n", IsrDll, IsrHandler, Irq, PhysAddr));

        // Set up ISR handler
        Info.SysIntr = ulSysIntr;
        Info.CheckPort = TRUE;
        Info.PortIsIO = TRUE;
        Info.UseMaskReg = FALSE;
        Info.PortAddr = (DWORD)PhysAddr + ES1371_dSTATUS_OFF;
        Info.PortSize = sizeof(DWORD);
        Info.Mask = ES1371_INTSTAT_PENDING;

        if (!KernelLibIoControl(g_IsrHandle, IOCTL_GIISR_INFO, &Info, sizeof(Info), NULL, 0, NULL)) {
            DEBUGMSG(ZONE_ERROR, (L"WAVEDEV: KernelLibIoControl call failed.\r\n"));
        }
    }
}