MSI-X Table Base Address Register (MXTBAR) – Offset 344 - 1.2 - ID:615146 | Intel® 400 Series Chipset On-Package Platform Controller Hub

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MSI-X Table Base Address Register (MXTBAR) – Offset 344

This register is locked down and cannot be written when GCR.RCL bit is set to '1'.

Bit Range	Default	Access	Field Name and Description
31:1	0000000000000000000000000000000b	RW/L	Table Base Address (TBA) This is the value of the Base Address [31:01] assigned by BIOS to allocate separate resources for the memory BAR associated with the MSI-X Table on the PCIe SSD device. MSI-X table is located at starting address (MXTBAR.TBA[31:01] & '0' + MXTRC.TO & "000") in this case.
0	0b	RW/L	Table Base Address Valid (TBAV) This bit is set to '1' when BIOS has assigned separate resources for the memory BAR associated with the MSI-X Table on the PCIe SSD device and the Table Base Address (TBA) field is valid. This bit is '0' when no separate resources are required for the MSI-X Table, such as in the case MSI-X Table resides under the same memory BAR used by the Host Controller interface on the PCIe SSD device.

Bit Range

Default

Access

Field Name and Description

31:1

0000000000000000000000000000000b

RW/L

Table Base Address (TBA)

This is the value of the Base Address [31:01] assigned by BIOS to allocate separate resources for the memory BAR associated with the MSI-X Table on the PCIe SSD device.

MSI-X table is located at starting address (MXTBAR.TBA[31:01] & '0' + MXTRC.TO & "000") in this case.

RW/L

Table Base Address Valid (TBAV)

This bit is set to '1' when BIOS has assigned separate resources for the memory BAR associated with the MSI-X Table on the PCIe SSD device and the Table Base Address (TBA) field is valid.

This bit is '0' when no separate resources are required for the MSI-X Table, such as in the case MSI-X Table resides under the same memory BAR used by the Host Controller interface on the PCIe SSD device.

MSI-X PBA Remap Configuration (MXPRC)

MSI-X Table Remap Configuration (MXTRC) MSI-X PBA Remap Configuration (MXPRC)