Datasheet

Gigabit LAN Configuration Registers
Intel® Xeon® Processor D-1500 Product Family 229
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
6.1.10 MBARA—Memory Base Address Register A (Gigabit LAN—
D25:F0)
Address Offset: 10h–13h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
The internal CSR registers and memories are accessed as direct memory mapped
offsets from the base address register. SW may only access whole DWord at a time.
6.1.11 MBARB—Memory Base Address Register B (Gigabit LAN—
D25:F0)
Address Offset: 14h–17h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
The internal registers that are used to access the LAN Space in the External FLASH
device. Access to these registers are direct memory mapped offsets from the base
address register. Software may only access a DWord at a time.
6.1.12 MBARC—Memory Base Address Register C (Gigabit LAN—
D25:F0)
Address Offset: 18h–1Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
Internal registers, and memories, can be accessed using I/O operations. There are two
4 Byte registers in the I/O mapping window: Addr Reg and Data Reg. Software may
only access a DWord at a time.
Bit Description
31:17 Base Address (BA) — R/W. Software programs this field with the base address of this region.
16:4 Memory Size (MSIZE) — RO. Memory size is 128 KB.
3 Prefetchable Memory (PM) — RO. The GbE LAN controller does not implement prefetchable
memory.
2:1 Memory Type (MT) — RO. Clear to 00b indicating a 32 bit BAR.
0 Memory / IO Space (MIOS) — RO. Clear to 0 indicating a Memory Space BAR.
Bit Description
31:12 Base Address (BA) — R/W. Software programs this field with the base address of this region.
11:4 Memory Size (MSIZE) — RO. Memory size is 4 KB.
3 Prefetchable Memory (PM) — RO. Clear to 0b indicating the Gb LAN controller does not
implement prefetchable memory.
2:1 Memory Type (MT) — RO. Clear to 00b indicating a 32 bit BAR.
0 Memory / IO Space (MIOS) — RO. Clear to 0 indicating a Memory Space BAR.
Bit Description
31:5 Base Address (BA) — R/W. Software programs this field with the base address of this region.
4:1 I/O Size (IOSIZE) — RO. I/O space size is 32 Bytes.
0 Memory / I/O Space (MIOS) — RO. Set to 1 indicating an I/O Space BAR.