IDT 89HPES64H16G2 User Manual page 258

IDT PCI to PCI Bridge and Proprietary Port Specific Registers
PWRBDSEL - Power Budgeting Data Select (0x284)
Bit
Field
7:0
31:8
PWRBD - Power Budgeting Data (0x288)
Bit
Field
31:0
PWRBPBC - Power Budgeting Power Budget Capability (0x28C)
Bit
Field
0
31:1
PWRBDV[7:0] - Power Budgeting Data Value [7:0] (0x300 - 0x31C)
Bit
Field
31:0
PES64H16G2 User Manual
Field Default
Type
Name Value
DVSEL RW 0x0
Reserved RO 0x0
Field Default
Type
Name Value
DATA RO 0x0
Field Default
Type
Name Value
SA RWL 0x0
Reserved RO 0x0
Field Default
Type
Name Value
DV RW Undefined
Sticky
Description
Data Value Select. This field selects the Power Budgeting Data
Value (PWRBDVx) register whose contents are reported in the
Data (DATA) field of the Power Budgeting Data (PWRBD) register.
Setting this field to a value greater than 7, causes zero to be
returned in the DATA field of the PWRBD register.
Reserved field.
Description
Data. If the Data Value Select (DVSEL) field in the Power Budget-
ing Data Select register contains a value of zero through 7, then
this field returns the contents of the corresponding Power Budget-
ing Data Value (PWRBDVx) register. Otherwise, this field contains
a value of zero.
Description
System Allocated. When this bit is set, it indicates that the power
budget for the device is included within the system power budget
and that reported power data for this device should be ignored.
If the power budgeting capability is used, then this field should be
initialized with data from a serial EEPROM.
Reserved field.
Description
Data Value. This 32-bit field is used to hold power budget data in
the format described in Section 7.15.3 in the PCI Express 2.0 Base
Specification.
This field may be read and written when the Power Budgeting Data
Value Unlock (PWRBDVUL) bit is set in the Switch Control
(SWCTL) register. When the PWRBDVUL bit is cleared, this regis-
ter is read-only and writes are ignored.
If the power budgeting capability is used, then this field should be
initialized with data from a serial EEPROM.
16 - 48 April 5, 2013