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SRIO Registers

Table 120. Mailbox-to-Queue Mapping Register Hn (RXU_MAP_Hn) Field Descriptions (continued)

Bit

Field

Value

Description

7–6

Reserved

0

These read-only bits return 0s when read.

5–2

QUEUE_ID

0–15

Queue identification number. This field selects which of the 16 RX buffer

 

 

 

queues is associated with mapper n.

1

PROMISCUOUS

 

Promiscuous access

 

 

0

Mapper n checks the incoming sourceID (access is restricted to one

 

 

 

sender). When determining which transactions to service, the mapper

 

 

 

checks the sourceID in addition to the mailbox and letter qualifications.

 

 

1

Mapper n ignores the incoming sourceID (access is available to any

 

 

 

sender). When determining which transactions to service, the mapper

 

 

 

checks only the mailbox and letter qualifications.

0

SEGMENT_MAPPING

 

Segment mapping

 

 

0

Single-segment messaging. Up to 64 mailboxes are available. All six

 

 

 

bits of the MAILBOX and MAILBOX_MASK fields of RXU_MAP_Ln are

 

 

 

valid.

 

 

1

Multi-segment messaging. Up to 4 mailboxes are available. Only the 2

 

 

 

LSBs of the MAILBOX and MAILBOX_MASK fields of RXU_MAP_Ln

 

 

 

are valid.

180

Serial RapidIO (SRIO)

SPRUE13A –September 2006

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Texas Instruments TMS320TCI648x manual Queueid, Segmentmapping