User manual

ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
30-62 Freescale Semiconductor
30.10.3 OAM Performance Monitoring Tables
The OAM performance monitoring tables include performance monitoring block test parameters, as
shown in Figure 30-37. Each block test needs a 32-byte performance monitoring table in the dual-port
RAM. In the connection’s RCT and TCT, the user allocates an OAM performance table to a VCC or VPC.
See Section 30.6.6, “Performance Monitoring.” PMT_BASE in the parameter RAM points to the base
address of the tables. The starting address of each PM table is given by PMT_BASE + RCT/TCT[PMT]
× 32.
Table 30-28 describes fields in the performance monitoring table.
0x1C — ER Explicit rate. Holds the explicit rate value (in cells/sec) of the current ABR channel. ER is
copied to the F-RM cell ER field. The user usually initializes this field to PCR. ER uses the
ATMF TM 4.0 floating-point format.
0x1E — ER-BRM Explicit rate-backward RM cell. Holds the maximum explicit rate value (in cells/sec) allowed
for B-RM cells. The ER-TA field which is inserted to each B-RM cell is limited by this value.
ER-BRM uses the ATMF TM 4.0 floating-point format.
012 45 78 15
Offset + 0x00 FMCE TSTE — BLCKSIZE
Offset + 0x02 — TX Cell Count (TCC)
Offset + 0x04 TUC1
Offset + 0x06 TUC0
Offset + 0x08 BEDC0+1-Tx
Offset + 0x0A BEDC0+1-RX
Offset + 0x0C TRCC1
Offset + 0x0E TRCC0
Offset + 0x10 — SN-FMC
Offset + 0x12 —
Offset + 0x14 PM CELL HEADER (VPI,VCI,PTI,CLP)
Offset + 0x16
Offset + 0x18 —
Offset + 0x1A
Offset + 0x1C
Offset + 0x1E
Figure 30-37. OAM Performance Monitoring Table
Table 30-27. ABR-Specific TCTE Field Descriptions (continued)
Offset Bits Name Description