To start Linux on the Zynq-7000 platform, certain hardware components must be properly configured. Here is a list of essential requirements.

A Triple Timer Counter is required. This component is crucial for time-based operations in the system.
Important: If multiple timers are present, the Zynq-7000 Linux kernel will automatically select the first timer defined in the device tree. Ensure that this timer is not used for other purposes to avoid conflicts.

External storage with a minimum capacity of 32MB is required. This is typically used for storing the Linux kernel and root file system.

A UART interface is needed for serial communication and interrupt handling. This is essential for debugging and system control.
Important: If using a soft core IP, make sure the interrupt pin is correctly connected to ensure proper operation.

Non-volatile memory is optional but recommended for persistent storage. Examples include QSPI Flash or SD/MMC cards.

An Ethernet interface is optional and useful if network access is required.
Important: As with the UART, if using a soft core IP, ensure the interrupt pin is properly connected to prevent issues during boot-up.

Exporting the Hardware Platform for Petalinux

Once the hardware platform is fully configured and the design is implemented, you need to generate a bitstream. To initialize a Petalinux project correctly, a hardware description file is necessary. This file can be exported from Vivado using the "Export Hardware" feature.

During the initialization process, Petalinux uses this hardware description file to generate key components such as the device tree source (DTS), u-boot configuration header, and Linux kernel drivers. These elements are essential for the system to recognize and utilize the hardware properly. For more details, refer to Appendix A: “Petalinux Engineering Internal Structure.”

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