31:6

0h

RO

Reserved (RSVD)

Reserved

5

0h

RW/1C

NMI VLW Delivery Status (NMI_​VLW_​STS)

A writeable status bit which is set whenever a VLW message that assert NMI is successfuly sent and the associated completion is received. Its intent is to enable a pooling mechanism for software to enforce NMI_​NOW message ordering. Once set, writing the bit to1 will clear the status. Writing ithe bit to 0 has no effect.

4

0h

RO/V

NMI Status (NMI_​STS)

RO status bit indicating the current NMI status. The bit will be set to (1b1) if any NMI source is asserted and NMI2SMI_​EN is set to (1b0).


Note: In models *not* compiled with the USE_​NMI_​CTRL_​REG, the value of NMI2SMI_​EN will come from the mu1_​smnmi2smi_​en interface pin rather than the NMI2SMI_​EN control register bit.

3

0h

RO/V

NMI-to-SMI Status (NMI2SMI_​STS)

RO status bit indicating the current NMI2SMI status. The bit will be set (1b1) if any NMI source is asserted and NMI2SMI_​EN is set (1b1).


Note: In models *not* compiled with the USE_​NMI_​CTRL_​REG, the value of NMI2SMI_​EN will come from the mu1_​smnmi2smi_​en interface pin rather than the NMI2SMI_​EN control register bit.

2

0h

RW

NMI-to-SMI Enable (NMI2SMI_​EN)

Setting to 1b1 causes NMIs to be sent as ASSERT_​SMI/DEASSERT_​SMI messages to PMC instead of the regular NMI messages. Setting to 1b0 maintains the regular NMI routing (as VLW and VM).
Bits NMI_​NOW and NMI2SMI_​EN can't be configurated on same cycle.


BXT_​ONLY: NMI routing control through setting NMI2SMI_​EN bit is only enable in models compiled with the USE_​NMI_​CTRL_​REG parameter set. Currently this is only supported in BXT.

1

0h

RO/V

NMI NOW Status (NMI_​NOW_​STS)

RO status bit indicating the current state of NMI_​NOW. See NMI_​NOW.

0

0h

WO

NMI Now Command (NMI_​NOW)

Writing 1b1 to NMI_​NOW inverts the NMI NOW Status (NMI_​NOW_​STS) value. The first time NMI_​NOW is written sets the NMI_​NOW_​STS and initiates an NMI. The next write clears the NMI_​NOW_​STS and allows initiating NMI by the next write to NMI_​NOW. Writing 1b0 to NMI_​NOW has no effect.
Bits NMI_​NOW and NMI2SMI_​EN can't be configurated on same cycle.


BXT_​ONLY: Initiating an NMI via the NMI_​NOW register bit is only enable in models compiled with the USE_​NMI_​CTRL_​REG parameter set. Currently this is only supported in BXT.