307013-003 Datasheet, PDF (494/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

SATA Controller Registers (D31:F2) (Desktop and Mobile Only)
12.1.6.2
Bit
Description
Secondary Mode Native Enable (SNE) — R/W / RO.
Determines the mode that the secondary channel is operating in.
0 = Secondary controller operating in legacy (compatibility) mode
1 = Secondary controller operating in native PCI mode.
2
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit is read-
only (RO). Software is responsible for clearing this bit before entering combined mode.
When MAP.MV is 00b, this bit is read/write (R/W).
If this bit is set by software, then the PNE bit (bit 0 of this register) must also be set by
software. While in theory these bits can be programmed separately, such a
configuration is not supported by hardware.
Primary Mode Native Capable (PNC) — RO.
0 = Primary controller only supports legacy mode.
1 1 = Primary controller supports both legacy and native modes.
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit reports
as a 0. When MAP.MV is 00b, this bit reports as a 1
Primary Mode Native Enable (PNE) — R/W / RO.
Determines the mode that the primary channel is operating in.
0 = Primary controller operating in legacy (compatibility) mode.
1 = Primary controller operating in native PCI mode.
0
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit is read-
only (RO). Software is responsible for clearing this bit before entering combined mode.
When MAP.MV is 00b, this bit is read/write (R/W).
If this bit is set by software, then the SNE bit (bit 2 of this register) must also be set by
software. While in theory these bits can be programmed separately, such a
configuration is not supported by hardware.
When Sub Class Code Register (D31:F2:Offset 0Ah) = 04h
Address Offset: 09h
Default Value: 00h
Attribute:
Size:
RO
8 bits
12.1.6.3
Bit
Description
Interface (IF) — RO.
7:0
When configured as RAID, this register becomes read only 0.
When Sub Class Code Register (D31:F2:Offset 0Ah) = 06h
Address Offset: 09h
Default Value: 01h
Attribute:
Size:
RO
8 bits
Bit
Description
Interface (IF) — RO.
7:0
Indicates the SATA Controller supports AHCI, rev 1.0.
494
Intel ^® ICH7 Family Datasheet