Intel 82559 用户手册

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The 82558 and later generation controllers (except the 82559ER) are capable of generating a wake-

up event upon reception of a Magic Packet. This feature is enabled by setting a bit in the 

Configuration command.

The controller may be configured to wake up the system on any packet that passes the Individual 

Address filtering or the multicast address filtering. The wake up enable control is done by the 
individual address match wake enable bit and the multicast match wake enable bit of the 

configuration structure.

Note: The 82558 B-step has the following modifications:

•

Address match wake up depends on two configuration bits:

— Bit 0 in Byte 19 of the configuration structure changed its role from Address Wake Enable 

to IA Match Wake Enable.

— Bit 7 in Byte 9 of the configuration structure is MC Match Wake Enable.

•

Regardless of the power management event configuration, packets that pass address filtering 

are transferred to the micromachine for either storage or further processing if the clock signal 

is active on the PCI CLK pin.

•

The 82558 B-step will not wake up the system on a broadcast address match (except for ARP 

frames and frames that match the flexible filtering definition).

Address Resolution Protocol (ARP) is used for MAC address resolution of a machine. This 

protocol generally precedes any IP transaction. The controller can wake up the system when an 

ARP frame is received if configured by the ARP Wake Enable (ARP_Wake_En) configuration bit.

Note: The broadcast disable configuration bit should equal 0 (broadcast enabled).

The 82558 and 82559 devices are capable of handling 802.1q VLAN headers if they are configured 

by the VLAN ARP configuration bit. If this bit is set to 1, the devices can handle ARP frames with 

or without a 4-byte VLAN header. If it is set to 0 (default), only ARP frames without the VLAN 
header pass the filter. Multiple IP addresses are not supported by the fixed ARP filter. However, 

they can be handled through flexible filtering.

The controller needs to be configured with the 16 least significant bits of the IP address 

(IP_Address configuration word) if ARP filtering is enabled.

The ARP frame format is illustrated below.

0-5

FF, ... FF

Broadcast destination address