Intel 6 SERIES CHIPSET - DATASHEET 01-2011 - Page 461

Datasheet 461
LPC Interface Bridge Registers (D31:F0)
13.1.23 GEN1_DEC—LPC I/F Generic Decode Range 1 Register
(LPC I/F—D31:F0)
Offset Address: 84h – 87h Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
13.1.24 GEN2_DEC—LPC I/F Generic Decode Range 2 Register
(LPC I/F—D31:F0)
Offset Address: 88h – 8Bh Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask — R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2
Generic I/O Decode Range 1 Base Address (GEN1_BASE) — R/W.
NOTE: The PCH does not provide decode down to the word or byte level
1Reserved
0
Generic Decode Range 1 Enable (GEN1_EN) — R/W.
0 = Disable.
1 = Enable the GEN1 I/O range to be forwarded to the LPC I/F
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask — R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2
Generic I/O Decode Range 2 Base Address (GEN1_BASE) — R/W.
NOTE: The PCH does not provide decode down to the word or byte level.
1Reserved
0
Generic Decode Range 2 Enable (GEN2_EN) — R/W.
0 = Disable.
1 = Enable the GEN2 I/O range to be forwarded to the LPC I/F