Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
9.3 Channel RAM (CH_RAM)
Table 39 summarizes the contents of the CH_RAM.
Table 39. Channel RAM (CH_RAM) Summary
Byte
Offset
Long
Offset
Read or
Write
Name
Description
01000000h 400000h Channel Control Block (CCB)
01000000h 400000h Multicast Control Block
R/W
R/W
Receive and transmit per-channel control block.
Control block for transmit multicast linked lists.
9.3.1 Channel Control Block
Base address: 400000h (01000000h byte)
Index:10h
Entry number (refer to “CH_RAM_CONFIG” on page 105)
For CH_RAM_CONFIG = 0h, the entry number is from 0 to 2047.
For CH_RAM_CONFIG = 1h, the entry number is from 0 to 4095.
For CH_RAM_CONFIG = 2h, the entry number is from 0 to 8191.
For CH_RAM_CONFIG = 3h, the entry number is from 0 to 16385.
Type: Read/Write
Long address:
In the receive direction, the long address = 400000h + RX_CHAN_NUM × 10h+
long_offset
In the transmit direction, the long address = 400000h + OUTCHAN × 10h+
long_offset.
Table 40. Channel Control Block Summary
Byte
Offset Offset
Long
Read or
Write
Name
Description
0h
4h
8h
Ch
0h
1h
2h
3h
RX_CH_CONFIG
RX_CH_TAG
R/W
R/W
R/W
Overall controls for channel.
Switch fabric tag.
RX_CH_NEW_VPI_VCI
RX_CH_STATE
VPI/VCI to which you want to translate.
Current channel state.
R/W (init
only)
10h
14h
4h
5h
Not used
R/W
Write with a 0 to maintain software compatibility with future versions.
The next channel in the round-robin linked list.
RX_CH_NEXT_CH
R/W (init
only)
18h
1Ch
20h
6h
7h
8h
Reserved
R/W (init
only)
Initialize to 0 at initial setup. Software modifications to this location
after setup may cause incorrect operation.
Reserved
R/W (init
only)
Initialize to 0 at initial setup. Software modifications to this location
after setup may cause incorrect operation.
RX_CH_SEQ_ST
R/W (init
only)
State of the sequencing algorithm.
24h
28h
9h
Not used
R/W
R/W
Write with a 0 to maintain software compatibility with future versions.
Overall controls for the channel.
Ah
TX_CH_CONFIG
183
PMC [ PMC-SIERRA, INC ]
