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5.45LSUnControlRegister4(LSUn_REG4)
SRIORegisters
Therearefouroftheseregisters,oneforeachLSU.
Figure101.LSUnControlRegister4(LSUn_REG4)
31-3029-2827-2625-2423-16
OUTPORTIDPRIORITYXAMBSID_SIZEDESTID
RW-0x00RW-0x00RW-0x00RW-0x00RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
15-87-10
DESTIDReservedINTER
RUPT
_REQ
RW-0x00R-0x00RW-
0x00
LEGEND:R=Readonly;-n=valueafterreset
Table75.LSUnControlRegister4(LSUn_REG4)FieldDescriptions
BitFieldValueDescription
31-30OUTPORTIDNotapplicableforRapidIOheader.Indicatestheoutputportnumberforthepackettobe
transmittedfrom.SpecifiedbytheCPUalongwithNodeID.
29-28PRIORITYRapidIOpriofieldspecifyingpacketpriority.Requestpacketsshouldnotbesentataprioritylevelof
3inordertoavoidsystemdeadlock.Itistheresponsibilityofthesoftwaretoassigntheappropriate
outgoingpriority.
27-26XAMBSRapidIOxambsfieldspecifyingextendedaddressMSB
25-24ID_SIZERapidIOttfieldspecifying8or16bitDeviceIDs
00b8bitdeviceIds
01b16bitdeviceIds
23-8DESTIDRapidIOdestinationIDfieldspecifyingtargetdevice
7-1ReservedReserved
0INTERRUPT_RECPUcontrolledrequestbitusedforinterruptgeneration.Typicallyusedinconjunctionwith
QNon-postedcommandstoalerttheCPUwhentherequesteddata/statusispresent.
0bInterruptisnotrequesteduponcompletionofcommand
1bInterruptisrequesteduponcompletionofcommand
SerialRapidIO(SRIO) 146SPRU976–March2006
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