MPC8540 datasheet(1013/1302 Pages) FREESCALE

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RapidIO Functionality

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

Freescale Semiconductor

17-89

17.5 RapidIO Functionality

This section describes RapidIO general device functionality, common transport layer

functionality, and logical layer functionality.

17.5.1 General Functionality Lists

The general device functionality lists are applicable to devices of all classes, including switch

devices without end points. The following tables list the functions that the RapidIO controller

supports.

(100)

Packet control:

Sub_type (contents)

000 Idle (The RapidIO controller sets to 1111)

001 Stomp (unused)

010 EOP (The RapidIO controller sets to 1111)

011 Restart From Retry (unused)

100 Throttle (number of aligned pacing idles)

101 TOD-sync (number of max sized packets)

(101)

Link request:

The RapidIO controller sets buf_status to 0xF

when it generates a link request command.

000 Send training

010 Override width

011 Reset

100 Input status

Note that the RapidIO controller causes a

checkstop if a software-initiated send

training link request command collides

with an inbound send training link request

which is immediately followed by an

inbound training pattern.

(110)

Link response:

Ack status

000 Expecting ackID 0

001 Expecting ackID 1

....

111 Expecting ackID 7

Link status

0000 Un-initialized

0001 Initializing

0010 Error

0011 Stopped

0100 Retry-stopped

0101 Error-stopped

1000 Valid, ackID 0

....

111 Valid, ackID 7

Table 17-85. Control Symbol Formats (continued)

Symbol

Type

Symbol Format

Comments

S=1 SUB_TYPE

CONTENTS

100

00000

S=1

CMD

BUF_STATUS 100

00000

S=1 ACK_STAT

LINK_STAT

100

00000

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