Datasheet
Gigabit LAN Configuration Registers
236 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
6.1.33 DEVCTRL—Device Control Register (Gigabit LAN—D25:F0)
Address Offset: E4–E5h Attribute: R/W
Default Value: 0000h Size: 16 bits
6.2 Gigabit LAN Capabilities and Status Registers
(CSR)
The internal CSR registers and memories are accessed as direct memory mapped
offsets from the base address register in Section 6.1.10. Software may only access
whole DWord at a time.
Note: Register address locations that are not shown in Tab l e 6- 1 should be treated as
Reserved.
Bit Description
15:9 Reserved
8 Transactions Pending (TXP) — R/W.
1 = Indicates the controller has issued Non-Posted requests which have not been completed.
0 = Indicates that completions for all Non-Posted requests have been received.
7:1 Reserved
0 Initiate Function Level Reset — R/W. This bit is used to initiate an FLT transition. A write of 1
initiates the transition. Since hardware must not respond to any cycles until Function Level Reset
completion, the value read by software from this bit is 0.
Table 6-2. Gigabit LAN Capabilities and Status Registers Address Map (Gigabit LAN—
MBARA)
MBARA +
Offset
Mnemonic Register Name Default Attribute
00h–03h GBECSR_00 Gigabit Ethernet Capabilities and
Status Register 00
00100241h R/W
18h–1Bh GBECSR_18 Gigabit Ethernet Capabilities and
Status Register 18
01501000h R/W/SN
20h–23h GBECSR_20 Gigabit Ethernet Capabilities and
Status Register 20
1000XXXXh R/W/V
2Ch–2Fh GBECSR_2C Gigabit Ethernet Capabilities and
Status Register 2C
00000000h R/W
F00h–F03h GBECSR_F00 Gigabit Ethernet Capabilities and
Status Register F00
00010008h R/W/V
F10h–F13h GBECSR_F10 Gigabit Ethernet Capabilities and
Status Register F10
0004000Ch R/W/SN
5400h–5403h GBECSR_5400 Gigabit Ethernet Capabilities and
Status Register 5400
XXXXXXXXh R/W
5404h–5407h GBECSR_5404 Gigabit Ethernet Capabilities and
Status Register 5404
XXXXXXXXh R/W
5800h–5803h GBECSR_5800 Gigabit Ethernet Capabilities and
Status Register 5800
00000008h R/W/SN
5B54h–5B57h GBECSR_5B54 Gigabit Ethernet Capabilities and
Status Register 5B54
60000040h RO