HSIO Power Management Configuration Reg 2 (MODPHY_PM_CFG2) – Offset 10c4 - 001 - ID:834576 | Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

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HSIO Power Management Configuration Reg 2 (MODPHY_PM_CFG2) – Offset 10c4

Bit Range	Default	Access	Field Name and Description
31:12	0h	RO	Reserved
11:0	fffh	RW	ModPHY Lane Sx SUS Well Power Gating Policy [11:0] (MLSXSWPGP) This is a bit per lane that controls SUS Well Power Gating for a ModPHY lane when system is in Sx. Bit 0: Corresponds to ModPHY Lane 0 Bit 1: Corresponds to ModPHY Lane 1 Bit 2: Corresponds to ModPHY Lane 2 : : Bit 11: Corresponds to ModPHY Lane 11 For each lane: 0: Lane power gating not permitted in Sx. 1: Lane power gating is permitted in Sx. Note that strap information/PCIe Lane reversal information will be factored by BIOS when programming these bits in the configuration registers. For ease of PMC implementation, this field will be used to manage Sx policies even in S0. In other words, the earlier restriction that BIOS does not have to program this field if MLSPDDGE is 1 does not apply any more. BIOS shall set this field appropriately for all cases.

Bit Range

Default

Access

Field Name and Description

31:12

Reserved

11:0

fffh

ModPHY Lane Sx SUS Well Power Gating Policy [11:0] (MLSXSWPGP)

This is a bit per lane that controls SUS Well Power Gating for a ModPHY lane when system is in Sx.

Bit 0: Corresponds to ModPHY Lane 0

Bit 1: Corresponds to ModPHY Lane 1

Bit 2: Corresponds to ModPHY Lane 2

:

:

Bit 11: Corresponds to ModPHY Lane 11

For each lane:

0: Lane power gating not permitted in Sx.

1: Lane power gating is permitted in Sx.

Note that strap information/PCIe Lane reversal information will be factored by BIOS when programming these bits in the configuration registers.

For ease of PMC implementation, this field will be used to manage Sx policies even in S0. In other words, the earlier restriction that BIOS does not have to program this field if MLSPDDGE is 1 does not apply any more.

BIOS shall set this field appropriately for all cases.

HSIO Power Management Configuration Reg 3 (MODPHY_PM_CFG3)

HSIO Power Management Configuration Reg 1 (MODPHY_PM_CFG1) HSIO Power Management Configuration Reg 3 (MODPHY_PM_CFG3)