Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
Shadowed PCI Configuration Lower Base Address (SPCLBA) – Offset 18
This BAR creates 4 Kbytes of memory space to signify the base address (lower 32 bits) of the shadowed PCI configuration when used as an ACPI device.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:12 | 0h | RW/L | Lower Base Address (LBA) Base address for the PCI Configuration register shadowed to memory mapped. 4 KB is requested by hardwiring bits 11:4 to 0s.Locked when PCICFGCTL.SPCBAD = 1. |
11:4 | 0h | RO | Reserved (RSVD4) This is a Reserved Register |
3 | 0h | RO | Prefetchable (PREF) Indicates that this BAR is NOT pre-fetchable. |
2:1 | 0h | RO/V | Address Range (ADDRNG) The value of this field depends on the PCICFGCTL.SPCBAD bit. When PCICFGCTL.SPCBAD is 0, this field has a value of 10b, where it indicates that this BAR can be located anywhere in the 64-bit address space. When PCICFGCTL.SPCBAD bit is 1, this field has a value of 00b to indicate that this BAR does not exist. |
0 | 0h | RO | Space Type (SPTYP) Indicates that this BAR is located in memory space. |