EP80579 Datasheet, PDF (1485/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
37.6.4.11 RADV – Receive Interrupt Absolute Delay Timer Register
Table 37-60. RADV: Receive Interrupt Absolute Delay Timer Register
Description:
View: PCI 1
BAR: CSRBAR
Bus:Device:Function: M:0:0
Offset Start: 282Ch
Offset End: 282Fh
View: PCI 2
BAR: CSRBAR
Bus:Device:Function: M:1:0
Offset Start: 282Ch
Offset End: 282Fh
View: PCI 3
BAR: CSRBAR
Bus:Device:Function: M:2:0
Offset Start: 282Ch
Offset End: 282Fh
Size: 32 bits
Default: 00000000h
GbE0: Aux
Power Well: Gbe1/2:
Core
Bit Range
31 : 16
Bit Acronym
Bit Description
Rsvd
Reserved
Receive Absolute Delay Timer
Receive Absolute delay timer measured in increments of
RMII: 1.28 microseconds
RGMII: 1.024 microseconds.
(0b =disabled)
Sticky
Bit Reset
Value
0h
Bit Access
RV
15 : 00
RADT
If the packet delay timer is used to coalesce receive
interrupts, the Ethernet controller ensures that when
receive traffic abates, an interrupt is generated within a
specified interval of no receives. During times when receive
traffic is continuous, it may be necessary to ensure that no
receive remains unnoticed for too long an interval. This
register can be used to ENSURE that a receive interrupt
occurs at some predefined interval after the first packet is
received. When this timer is enabled, a separate absolute
countdown timer is initiated upon successfully receiving
each packet to system memory. When this absolute timer
expires, pending receive descriptor writebacks are flushed
and a receive timer interrupt is generated.
Setting this register to 0b disables the absolute timer
mechanism (the RDTR register should be used with a value
of 0b to cause immediate interrupts for all receive
packets).
Receive interrupts due to a Receive Packet Timer (RDTR)
expiration cancels a pending RADV interrupt. If enabled,
the RADV countdown timer is reloaded but halted, so as to
avoid generation of a spurious second interrupt after the
RDTR has been noted.
0h
RW
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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