ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 384

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
Receive Queues (RXQUE)
Page 384 of 676
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31-18
17-16
Bit(s)
7-4
15
14
13
12
11
10
9
8
Reserved
Status-Multiplexer control
Disable Auto-Free
Disable BCACH Advice
Disable Timestamps
Queue Direction
Reserved
System-Memory Select
System Receive Queue
Size of Event
Reserved
Reserved
Name
Reserved.
00
01
10
11
Inhibits freeing of packet-buffers when the receive queue is full.
When set, the bcach advice is disabled for this queue. This is necessary in order to
use a queue as a general purpose container for user data.
When set, timestamps are disabled for this queue. This is necessary in order to run cut
through modes.
When set, the direction of the queue is assumed to be reversed. This only affects the
full condition and the threshold exceeded condition. When this bit is set, the polarity of
these status signals changes. Thus, the full condition becomes an empty condition,
and the two threshold conditions trigger when the length of the queue is less than the
corresponding threshold instead of greater than or equal. This mode is mainly used for
queues that relay information from the system to the IBM3206K0424. Also, event
enqueues to a queue that is reversed do not start the event latency timer (since no
new event for system has arrived).
Reserved
This is valid only when bit 9 (System Receive Queue) is set.
0
1
0
1
Reserved
Select “Full/Empty”
Select “Threshold Exceeded” (power-on value)
Select “Head Valid”
Reserved
PCI Memory (power-on value)
On-Chip Memory
32 bits (power-on value)
64 bits
Description
9
8
7
Reserved
6
5
4
pnr25.chapt05.01
August 14, 2000
3
Upper Bound
Preliminary
2
1
0