MPC8280 datasheet(990/1386 Pages) FREESCALE

990 / 1386 page

ATM Controller and AAL0, AAL1, and AAL5

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

31-30

Freescale Semiconductor

31.6.6.1

Running a Performance Block Test

For bidirectional PM block tests, FMCs are monitored at the receive side and generated at the transmit side.

The following setup is required to run a bidirectional PM block test on an active VCC:

1. Assign one of the available 64 performance monitoring tables by writing to both RCT[PMT] and

TCT[PMT] and initializing the one chosen. See Section 31.10.3, “OAM Performance Monitoring

Tables.”

2. For PM F5 segment termination set RCT[SEGF]; for PM F5 end-to-end termination set

RCT[ENDF].

3. Finally, set the channel’s RCT[PM] and TCT[PM] and the receive raw cell’s RCT[PM].

For unidirectional PM block tests:

•

For PM block monitoring only, set only the RCT fields above.

•

For PM block generation only, set only the TCT fields above.

To run a block test on a VPC, assign all the VCCs of the tested VPC to the same performance monitoring

table. Configure RCT[PMT] and TCT[PMT] to specify the performance monitoring table associated with

each F4 channel.

31.6.6.2

PM Block Monitoring

PM block monitoring is done by the receiver. After initialization (see Section 31.6.6.1), whenever a cell is

received for a VCC or VPC, the TRCC counters are incremented and the BEDC is calculated. When an

FMC is received, the CP adds the BRC fields into the cell payload (TRCC

0, TRCC0+1, BLER) and transfers

the cell to the receive raw cell queue. The user can monitor the BRC cell results and transfer the cell to the

transmit raw cell queue.

Table 31-10. Performance Monitoring Cell Fields

Field

Description

BRC

FMC

MCSN

Monitoring cell sequence number. The sequence number of the performance

monitoring cell (modulo 256).

Yes

TUC0+1

Total user cell 0+1 count. Counts all user cells (modulo 65,536) sent before the

FMC was inserted.

Yes

TUC0

Total user cell 0 count. Counts CLP = 0 user cells (modulo 65,536) sent before

the FMC was inserted.

Yes

TSTP

Time stamp. Used to indicate when the cell was inserted.

Yes

BEDC0+1

Block error detection code. Even parity over the payload of the block of user cells

sent since the last FMC.

Yes

TRCC0

Total received cell count 0. Counts CLP=0 user cells (modulo 65,536) received

before the FMC was received.

Yes

BLER

Block error result. Counts error parity bits detected by the BEDC of the received

FMC.

Yes

TRCC0+1

Total received cell count 0+1. Counts all user cells (modulo 65,536) received

before the FMC was received.

Yes

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