Datasheet

LPC Interface Bridge Registers (D31:F0)
Intel® Xeon® Processor D-1500 Product Family 255
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
13 BIOS_E8_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS:
FFE80000h–FFEFFFFh
FFA80000h–FFAFFFFFh
12 BIOS_E0_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS:
FFE00000h–FFE7FFFFh
FFA00000h–FFA7FFFFh
11 BIOS_D8_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FFD80000h–FFDFFFFFh
FF980000h–FF9FFFFFh
10 BIOS_D0_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FFD00000h–FFD7FFFFh
FF900000h–FF97FFFFh
9 BIOS_C8_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FFC80000h–FFCFFFFFh
FF880000h–FF8FFFFFh
8 BIOS_C0_EN — R/W. This bit enables decoding two 512-KB BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FFC00000h–FFC7FFFFh
FF800000h–FF87FFFFh
7 BIOS_Legacy_F_EN — R/W. This enables the decoding of the legacy 64KB range at F0000h–
FFFFFh.
0 = Disable.
1 = Enable the following legacy ranges for the BIOS
F0000h–FFFFFh
Note: The decode for the BIOS legacy F segment is enabled only by this bit and is not affected by
the GEN_PMCON_1.iA64_EN bit.
6 BIOS_Legacy_E_EN — R/W. This enables the decoding of the legacy 64KB range at E0000h–
EFFFFh.
0 = Disable.
1 = Enable the following legacy ranges for the BIOS
E0000h–EFFFFh
Note: The decode for the BIOS legacy E segment is enabled only by this bit and is not affected by
the GEN_PMCON_1.iA64_EN bit.
5:4 Reserved
3 BIOS_70_EN — R/W. Enables decoding two 1-M BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FF70 0000h–FF7F FFFFh
FF30 0000h–FF3F FFFFh
2 BIOS_60_EN — R/W. Enables decoding two 1-M BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FF60 0000h–FF6F FFFFh
FF20 0000h–FF2F FFFFh
1 BIOS_50_EN — R/W. Enables decoding two 1-M BIOS memory ranges.
0 = Disable.
1 = Enable the following ranges for the BIOS
FF50 0000h–FF5F FFFFh
FF10 0000h–FF1F FFFFh
Bit Description