MSI-X Table Base Address (MXTBA) – Offset 10 - 1.2 - ID:615146 | Intel® 400 Series Chipset On-Package Platform Controller Hub

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MSI-X Table Base Address (MXTBA) – Offset 10

This BAR is used to allocate 32K, 16K or 8K Memory space for the MSI-X Table. The Memory space size is determined by BIOS by making bit-14 and bit-13 Read-Only '1' or Read-Write '0' based on SATAGC.MSS[1:0].

Bit Range	Default	Access	Field Name and Description
31:15	0h	RW	Base Address (BA) Base address of memory space.
14	0h	RW	Base Address Bit 14 (BAB14) When SATAGC.MSS[1:0]=00, this bit is Read Only '0' else it's Read Write '0'.
13	0h	RW	Base Address Bit 13 (BAB13) When SATAGC.MSS[1:0]=00 or 01, this bit is Read Only '0' else it's Read Write '0'.
12:4	-	-	Reserved
3	0h	RO	Prefetchable (PF) Indicates that this range is not pre-fetchable.
2:1	0h	RO	Type (TP) Indicates that this range can be mapped anywhere in 32-bit address space.
0	0h	RO	Resource Type Indicator (RTE) Indicates a request for Memory space.

MSI-X Pending Bit Array Base Address (MXPBA)

Header Type (HTYPE) MSI-X Pending Bit Array Base Address (MXPBA)