
IBM2520L8767
IBM Processor for ATM Resources
Packet Header
Page 66 of 553
atmrm.chapt03.01
08/27/99
LCD Field Definitions
The following are the definitions of the LCD fields grouped by major function:
A * after the name specifies a field that software should set up.
All reserved fields should be set to zero.
Common LCD Field Definitions
Field Name
Field Description
Note
aalType
Specifies the AAL for this LCD.
00 = Raw Mode
01 = AAL5
1
state
Specifies the reassembly state for this LCD. This field is used by the IBM2520L8767, but in order to
receive cells, an LCD must be initialized to idle state. The following are the valid values:
00 = Down State
01 = Idle State
10 = Reassembling State
11 = Error State
1
ctRxqNum
Specifies which rxque contains cut DMA descriptors. This field is only valid in cut-through and scatter
modes.
1
channelNum
Specifies which hardware channel is to be used. This field is only valid in cut-through mode h.
1
dmaQsel
Specifies which RAAL DMA queue should be selected when the dma is sent to DMAQS. See DMAQS
Raall/Csked Queue Number Register.
1
rxqNum
Specifies which rxque normal events should be posted. Note: some events may be routed to the error
queue based on your RXQUE setup.
1
rxPoolId
Specifies which POOL ID whould be used when getting buffers for received packets.
1
rxOffset
Specifies the offset into the IBM2520L8767 buffer where the received packet should be placed.
1
tucCLP0
LC statistic that counts the total users cells with CLP=0 received on this LC. For accurate counts, this
should initialized to zero.
Note:
this field can be changed to count packets received. See RAALL Control
Register.
1
tuc
LC statistic that counts the total users cells received on this LC. For accurate counts, this should initial-
ized to zero.
1
hostData
If enabled, the contents of this field are placed in packet of each received packet for this LCD. One use of
this, is to place a correlator to a host specific data structure for this LCD.
1
oamTUC
OAM blocking total user cells received on this LC. This is a rolling count that is updated when OAM block-
ing is enabled. A new value is set from each PM cell as it is received.
oamBIP
OAM blocking 16-bit Bit-Interleaved-Parity. This is the calculated bip over the current block of cells for
this LC. It is reset to zero on each PM cell reception for this LC.
1. Software should set up this field.