Mailbox Client Intel® FPGA IP User Guide

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ID 683290
Date 11/10/2021
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Document Table of Contents
Document Table of Contents x
1. Mailbox Client Intel FPGA IP User Guide 2. Appendix: CONFIG_STATUS and RSU_STATUS Error Code Descriptions
1. Mailbox Client Intel FPGA IP User Guide x
1.1. Device Family Support 1.2. Parameters 1.3. Mailbox Client Intel FPGA Core Interface Signals 1.4. Mailbox Client Intel FPGA IP Avalon® MM Memory Map 1.5. Commands and Responses 1.6. Specifying the Command and Response FIFO Depths 1.7. Enabling Cryptographic Services 1.8. Using the Mailbox Client Intel FPGA IP 1.9. Mailbox Client Intel FPGA IP Core Use Case Examples 1.10. Nios® II HAL Driver 1.11. Mailbox Client Intel FPGA IP User Guide Archives 1.12. Document Revision History for the Mailbox Client Intel FPGA IP User Guide
1.3. Mailbox Client Intel FPGA Core Interface Signals x
1.3.1. Clock and Reset Interfaces 1.3.2. Avalon® Memory-Mapped Interface 1.3.3. AXI Target Interface
1.4. Mailbox Client Intel FPGA IP Avalon® MM Memory Map x
1.4.1. Interrupt Enable Register 1.4.2. Interrupt Status Register 1.4.3. Timer Registers
1.5. Commands and Responses x
1.5.1. Operation Commands 1.5.2. Error Code Responses 1.5.3. Error Code Recovery
1.10. Nios® II HAL Driver x
1.10.1. Driver API
1. Mailbox Client Intel FPGA IP User Guide
2. Appendix: CONFIG_STATUS and RSU_STATUS Error Code Descriptions

1.5. Commands and Responses

The host controller communicates with the SDM using command and response packets via the Mailbox Client Intel® FPGA IP.

The first word of the command and response packets is a header that provides basic information about the command or response.

Figure 3. Command and Response Header Format
Note: The LENGTH field in the command header must match the command length of corresponding command.

The following table describes the fields of the header command.

Table 10.  Command and Response Header Description
Header Bit Description
Reserved [31:28] Reserved.
ID [27:24] The command ID. The response header returns the ID specified in the command header. Refer to Operation Commands for command descriptions.
0 [23] Reserved.
LENGTH [22:12] Number of words of arguments following the header. The IP responds with an error if a wrong number of words of arguments is entered for a given command.
Reserved [11] Reserved. Must be set to 0.
Command Code/Error Code [10:0] Command Code specifies the command. The Error Code indicates whether the command succeeded or failed.

In the command header, these bits represent command code. In the response header, these bits represent error code. If the command succeeds, the Error Code is 0. If the command fails, refer to the error codes defined in the Error Code Responses.

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