Autopolling Status Register (Offset: 0X458); Transmit Mac Mode Register (Offset: 0X45C) - Broadcom NetXtreme/NetLink BCM5718 Series Programmer's Manual

BCM5718 Programmer's Guide
Name
Fast_Clock

Autopolling Status Register (offset: 0x458)

Name
Reserved
Auto-polling Error

Transmit MAC Mode Register (offset: 0x45C)

Name
RR Weight
Transmit FTQ Arbitration Mode 26:24
HTX2B Count Down Mode
Broadcom
®
January 29, 2016 • 5718-PG108-R
Default
Bits Access Value
0 RW 0
Default
Bits Access Value
31:1 RO 0
0 W2C 0
Default
Bits Access Value
31:27 RW 00000
RW 000
23 RW 0
Ethernet MAC (EMAC) Registers
Description
–
Description
–
Indicates an autopolling error occurred, if set.
Description
This field may be programmed to assign a weight
to the "Weighted Round Robin" arbitration mode.
This field is applicable only when the appropriate
arbitration mode is chosen, i.e., [19:17] of this
register is equal to "001".
This field determines the arbitration mode of the
TCE block among LAN traffic and APE traffic as
below:
000–Simple Round Robin
001–Weighted Round Robin
010–Shut off APE transmit stream
011–Shut off LAN transmit stream
1xx–Reserved for future use
Caution: This field must remain static following
boot.
When this bit is 0:
If there is an HTX2B packet to be enqueued to
the HTX2B, FIFO. However, if the FIFO does not
have sufficient space, TCE drops the copy of the
HTX2B-bound packet and moves on.
When this bit is 1:
If there is an HTX2B packet to be enqueued to
the HTX2B, FIFO. However, if the FIFO does not
appear to have sufficient space at the first
attempt, TCE counts down a few clocks, then
makes a second attempt. If the FIFO still does
not have sufficient space, TCE simply drops the
copy of the HTX2B-bound packet and moves on.
The number of clocks to count-down is
programmable at register 0x464[31:24].
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