Intel 6 SERIES CHIPSET - DATASHEET 01-2011 - Page 657

Datasheet 657
EHCI Controller Registers (D29:F0, D26:F0)
16.1.29 SPECIAL_SMI—Intel Specific USB 2.0 SMI Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 70h–73h Attribute: R/W, R/WC
Default Value: 00000000h Size: 32 bits
Power Well: Suspend
Function Level Reset: No
Note: These bits are not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
31:25 Reserved.
24:22
SMI on PortOwner — R/WC. Software clears these bits by writing a 1 to it.
0 = No Port Owner bit change.
1 = Bits 24:22 correspond to the Port Owner bits for ports 0 (22) through 3 (24).
These bits are set to 1 when the associated Port Owner bits transition from 0
to 1 or 1 to 0.
21
SMI on PMCSR — R/WC. Software clears these bits by writing a 1 to it.
0 = Power State bits Not modified.
1 = Software modified the Power State bits in the Power Management Control/
Status (PMCSR) register (D29:F0, D26:F0:54h).
20
SMI on Async — R/WC. Software clears these bits by writing a 1 to it.
0 = No Async Schedule Enable bit change
1 = Async Schedule Enable bit transitioned from 1 to 0 or 0 to 1.
19
SMI on Periodic — R/WC. Software clears this bit by writing a 1 it.
0 = No Periodic Schedule Enable bit change.
1 = Periodic Schedule Enable bit transitions from 1 to 0 or 0 to 1.
18
SMI on CF — R/WC. Software clears this bit by writing a 1 it.
0 = No Configure Flag (CF) change.
1 = Configure Flag (CF) transitions from 1 to 0 or 0 to 1.
17
SMI on HCHalted — R/WC. Software clears this bit by writing a 1 it.
0 = HCHalted did Not transition to 1 (as a result of the Run/Stop bit being
cleared).
1 = HCHalted transitions to 1 (as a result of the Run/Stop bit being cleared).
16
SMI on HCReset — R/WC. Software clears this bit by writing a 1 it.
0 = HCRESET did Not transitioned to 1.
1 = HCRESET transitioned to 1.
15:14 Reserved.
13:6
SMI on PortOwner Enable — R/W.
0 = Disable.
1 = Enable. When any of these bits are 1 and the corresponding SMI on
PortOwner bits are 1, then the host controller will issue an SMI. Unused
ports should have their corresponding bits cleared.
5
SMI on PMSCR Enable — R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on PMSCR is 1, then the host controller
will issue an SMI.
4
SMI on Async Enable — R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on Async is 1, then the host controller will
issue an SMI