AXI Streaming Intel® FPGA IP for PCI Express* User Guide

ID 790711
Date 7/08/2024
Public
Document Table of Contents

7.3.1.4. HOT PLUG GEN CTRL

The following table lists details of HOT PLUG GEN CTRL Register. This register is only applicable for Root Port mode.

Default Value: 0x0000_0000

Table 75.  Hot Plug Control Register
Register Name Bit Attribute User Side Description
HOT PLUG GEN CTRL 0 RW

Attention Button Pressed

Indicates that the system attention button was pressed.

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

1 RW

Power Fault Detection

Indicates the power controller detected a power fault at this slot

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

2 RW

MRL Sensor Changed

Indicates that the state of the MRL sensor has changed.

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

3 RW

Presence Detect Changed.

Indicates that the state of the card presence detector has changed.

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

4 RW

Command Completed

Indicates that the Hot Plug controller completed a command.

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

5 RW

Data Link Layer State Change

Indicates the state of Data Link Layer Link Active bit of the Link.

Status register is changed

The IP passes on this information to HIP block and clears this bit indicating requested operation complete.

6 RW

MRL Sensor State

This bit reports the status of the MRL sensor

0 - MRL Closed

1 - MRL Open

7 RW

Presence Detect State

0 - Slot Empty

1 - Adaptor Present

8 RW

Electromechanical Interlock Status

Indicates whether the system electromechanical interlock is engaged

0 - Electromechanical Interlock Disengaged

1 - Electromechanical Interlock Engaged

13-9 RW

Slot Number

Indicates Slot Number of Function Generating Hot Plug Even

31 - 14 RsvdZ Reserved