Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ID | Date | Version | Classification |
---|---|---|---|
615146 | 08/09/2019 | 1.2 | Public |
Base Address Register1 (BAR1) – Offset 18
Memory accesses to BAR1 region are aliased to the PCI configuration space. The BAR1region is always 4K. Software access through BAR1 can only access the regular PCIconfiguration space. BAR1 memory accesses, which do not access a defined PCIconfiguration register, are treated as access to reserved register. If this register isdisabled then this is RO and always returns 0.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
63:32 | 00000000h | RW | Base Address high (BASEADDR1_HIGH)
|
31:12 | 00000h | RW | (BASEADDR1) This field is present if BAR1 is enabled through private configuration space. |
11:4 | 00h | RO | Size Indicator (SIZEINDICATOR1) Always is 0 as minimum size is 4K |
3 | 0h | RO | Prefetchable (PREFETCHABLE1) Indicates that this BAR is not prefetchable. |
2:1 | 2h | RO | Type (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 | Memory Space Indicator (MESSAGE_SPACE1) 0 Indicates this BAR is present in the memory space. |