Intel® Core™ Ultra Processors for H-series and U-series Platforms SOC I/O Registers
Base Address 1 (BAR1) – Offset 18
Base Address Register1 accesses to PCI configuration space and is always 4K type in [2:1] and memory space indicator in [0]
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:12 | 0h | RW | Base Address Field (BASEADDR1) Base Address1 This field is present if BAR1 is enabled through private configuration space. |
11:4 | 0h | RO | Size Field (SIZEINDICATOR1) Always is 0 as minimum size is 4K |
3 | 0h | RO | Prefetchable Field (PREFETCHABLE1) Prefetchable: Indicates that this BAR is not prefetchable. |
2:1 | 2h | RO | Type Field (TYPE1) If BAR_64b_EN is 0 then 00 indicates BAR lies in 32bit address range If BAR_64b_EN is 1 then 10 Indicates BAR lies in 64 bit address range |
0 | 0h | RO | Message Space Field (MESSAGE_SPACE1) Memory Space Indicator: 0 Indicates this BAR is present in the memory space |