82598EB Datasheet, PDF (81/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - PCIe
Bits
Initial
Value
R/W
Description
2:0
0b
3
0b
Reserved.
RO
Interrupt Status.¹
4
1b
RO
New Capabilities. Indicates that a device implements extended capabilities. The 82598 sets
this bit and implements a capabilities list to indicate that it supports PCI power management
MSIs and PCIe extensions.
5
0b
66 MHz Capable. Hardwired to 0b.
6
0b
Reserved.
7
0b
Fast Back-to-Back Capable. Hardwired to 0b.
8
0b
R/W1C
Data Parity Reported.
10:9
00b
DEVSEL Timing. Hardwired to 0b.
11
0b
R/W1C
Signaled Target Abort.
12
0b
R/W1C
Received Target Abort
13
0b
R/W1C
Received Master Abort.
14
0b
R/W1C
Signaled System Error.
15
0b
R/W1C
Detected Parity Error.
1. The Interrupt Status field is a RO field that indicates that an interrupt message is pending internally to the device.
Revision – The default revision ID of this device is 0x00. The value of the rev ID is a logic XOR
between the default value and the value in EEPROM word 0x1D. Note that LAN 0 and LAN 1 functions
have the same revision ID.
Class Code – The class code is a read-only hard-coded value that identifies the device functionality.
• LAN 0, LAN 1 – 0x020000 (Ethernet Adapter)
Cache Line Size – This field is implemented by PCIe devices as a read-write field for legacy purposes;
it has no PCIe device functionality. Loaded from EEPROM. All functions are initialized to the same value.
Latency Timer – Not used. Hardwired to 0b.
Header Type – This indicates if a device is single- or multi-function. If a single LAN function is the only
active one, this field has a value of 0x00 to indicate a single-function device. If other functions are
enabled, this field has a value of 0x80 to indicate a multi-function device.
Base Address Registers – The Base Address Registers (or BARs) are used to map register space of
various functions. 32-bit addresses are used in one register for each memory mapping window.
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