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

ID 813754
Date 5/15/2024
Public
Document Table of Contents

7.4.1.5. CFG REG IA CTRL

The following table lists details of configuration register indirect access control register.

Default value: 0x0000_0000

Table 73.  Configuration Register Indirect Access Control
Register Name Bit Location Attribute User Side Description
CFG REG IA CTRL 0 RO

Initiate Access.

This bit should be set when a master-like interface wants to read from or write to the PCIe* configuration space register.

The IP performs read or write operation to a function pointed to by IA_FN_NUM register when this bit is set and clears this bit indicating requested operation completes.

Master cannot initiate new transaction if this bit is set.

1 RW

Access Type.

Indicates access type of operation.

  • 0: Read Operation
  • 1: Write Operation
5:2 RW

Byte Enables.

Indicates Byte Enables of Write Operations.

  • 4'b0001: Write byte 0
  • 4'b0010: Write byte 1
  • 4'b0100: Write byte 2
  • 4'b1000: Write byte 3
  • 4'b1111: Write all bytes.

Any combinations of byte enables are valid, for example, 1010, 1011, etc.

27:6 RW

Register Address.

For each PF/VF, the address range starts from 0x0. For HIP port and status registers access, addressing follows address map shown in that section.

31:28 RsvdZ Reserved.