S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
It is the responsibility of the management entity to ensure the per-PHY policing parameters are
programmed correctly. All RAM addresses can be written to and read by an external
microprocessor.
The internal per-PHY policing RAM is shown below
Table 23 Internal Per-PHY Policing RAM
Address
[1:0]
31
0
00
01
10
11
PhyTAT LSB
(32)
Reserved
PHY I
(14)
PHY L
(14)
PhyTAT MSB
(2)
(2)
PHY Non-Compliant2
PHY Non-Compliant1
(16)
(16)
PHY
Unused
(10)
PHY
PHY VC
Count
(1)
PHY Action PHY Non-Compliant3
Police
Config.
(2)
Policing
Rollver
FIFO EN
(1)
(2)
(16)
The PHY Policing Configuration[1:0] field (of the Internal PHY Policing RAM at Addr[1:0] =
11) selects 1 of 4 settings (in the PHY Policing Configuration Register) in the Cell Processor
which allows any combination of CLP=0 or CLP=1 user cells, segment OAM cells, or RM cells
to be policed by the PHY GCRA. When the PHY Policing Rollover FIFO EN bit is logic 1, then
when the MSB of any of the non-compliant counts is set, an entry is generated into the Count
Rollover FIFO, and the MSB is cleared. When the PHY Policing Rollover FIFO EN bit is logic
0, no entries will be made due to per-PHY non-compliant counts, and the counts will saturate at
all-ones.
The PHY I (Increment) and L (Limit) fields are analogous to the per-VC Increment and Limit
fields and are programmed in the same way. The PHY Action[1:0] field controls the
programmable action to be taken on cells which are non-conforming to the PHY GCRA. Note
that tagging on a per-PHY basis is incompatible with performing GFR policing on any of the
connections on the PHY. If GFR is to be supported, then either PHY policing should be disabled
for those VCs, or the per-PHY policing action should be set to “00” or “11”.The PHY Action field
is programmed as follows:
Table 24 Per-PHY Policing Actions
PHY
Description
Action[1:0]
00
Set the Police status bit, but take no other action than to
increment the appropriate non-compliant cell counts.
01
Reduce the priority of high priority cells (i.e. tag CLP=0 cells.
Increment the appropriate non-compliant cell counts. This
option is incompatible with GFR policing on any VCs on the
PHY.
10
Reduce the priority of high priority cells and discard the low
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
99
PMC [ PMC-SIERRA, INC ]
