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UsingtheTopHATUtility
TopHATparsesthePCIconfigurationspacelookingforanycapabilitystructure.Ifitfindsacapability
structure,anewiconanddescriptionofthecapabilitywillshowunderthedevice.Forexample,underthe
XIO3130PCI/PCIbridge(TI)entry,acapabilityforPowerManagementCapabilityStructureisshownwith
aPMicon.Doubleclickinganyofthecapabilitiesopensanewdialogbox.Somedialogboxeshavetabs
thatdisplaymoreinformationaboutthecapability.Figure1-16showsthecontentsofthe“SlotInfo”tabfor
thePCIExpressCapabilityStructure.
Figure1-16.SlotInfo
Inthisexample,theXIO3130EVMisoperatinginhot-plugmode,ascanbeseenbylookingattheSlot
Capabilitiestableentries.TopHATcanbeusedtoexercisetheXIO3130,forexampleselectingblinkfrom
theAttentionIndicatorControldrop-downboxcausestheattentionindicatorLEDontheEVMtoblink.
NotethatthisdialogboxalsoshowswherethecapabilityexistsinthePCIconfigurationspace.Inthis
example,itisatoffset0x090.Clickingthe“OpenRegisterAccessWindow”opensthePCIRegisters
dialogbox(seeFigure1-17).Notethattheregisterwherethecapabilitybeginsisautomaticallyselected,
inthiscaseatPCIoffset0x090.
SLLU108–July2008XIO3130EVM13
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