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SRIORegisters
Figure113.MailboxtoQueueMappingRegisterPair
MailboxtoQueueMappingRegisterLn(RXU_MAP_Ln)
3130292423222116
LETTER_MASKMAILBOX_MASKLETTERMAILBOX
R/W-11R/W-111111R/W-00R/W-000000
150
SOURCEID
R/W-0000h
MailboxtoQueueMappingRegisterHn(RXU_MAP_Hn)
31
Reserved
R-0
1098765210
SEGMENT_
ReservedTTReservedQUEUE_IDPROMISCUOUS
MAPPING
R-0R/W-01R-00R/W-0000R/W-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=Valueafterreset
Table119.Mailbox-to-QueueMappingRegisterLn(RXU_MAP_Ln)FieldDescriptions
BitFieldValueDescription
31–30LETTER_MASK00b–11bLettermask.Each0inthisfieldindicatesadon'tcarebitintheletter
number.Thisallowsmapperntohandleasetorrangeofletternumbers
ratherthanonlyone.
29–24MAILBOX_MASKMailboxmask.Each0inthisfieldindicatesadon'tcarebitinthemailbox
number.Thisallowsmapperntohandleasetorrangeofmailboxnumbers
ratherthanonlyone.
Forasingle-segmentmessage:
000000b–111111b6-bitmailboxmaskvalue
Foramulti-segmentmessage:
xxxx00b–xxxx11b3-bitmailboxmaskvalue
23–22LETTER00b–11bLetternumber.IfLETTER_MASK=11b,thisistheonlyletternumber
handledbymappern.IfLETTER_MASKisnot11b,mappernhandlesthe
setofletternumbersformedwiththemaskbit(s).
21–16MAILBOXMailboxnumber.IfMAILBOX_MASK=111111b,thisistheonlymailbox
numberhandledbymappern.IfMAILBOX_MASKisnotall1s,mappern
handlesthesetofmailboxnumbersformedwiththemaskbit(s).
Forasingle-segmentmessage:
000000b–111111b6-bitmailboxnumber(0to63)
Foramulti-segmentmessage:
xxxx00b–xxxx11b3-bitmailboxnumber(0to3)
15–0SOURCEID0000h–FFFFhSourceidentificationnumber.TheSOURCEIDfieldisusedtoindicatewhich
externaldevicehasaccesstomappernanditscorrespondingqueue.A
comparisonisperformedbetweenthesourceIDoftheincomingmessage
packetandtheSOURCEIDfield.Ifthevaluesdonotmatch,anERROR
responseissenttothesender,andthetransactionisloggedinthelogical
layererrormanagementcaptureregisters.
Table120.Mailbox-to-QueueMappingRegisterHn(RXU_MAP_Hn)FieldDescriptions
BitFieldValueDescription
31–10Reserved0Theseread-onlybitsreturn0swhenread.
9–8TTTransporttype
0DuringthesourceIDcomparison,theincomingsourceIDiscompared
withthe8LSBsoftheSOURCEIDfieldofRXU_MAP_Ln.
1DuringthesourceIDcomparison,theincomingsourceIDiscompared
withall16bitsoftheSOURCEIDfieldofRXU_MAP_Ln.
SPRUE13A–September2006SerialRapidIO(SRIO)179
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