Establishing MCU Engineering Based on Coretex-R52 Core

Is there a CMSIS file that supports Coretex-R52? To develop an MCU based on this core, establish a basic project using eclipse and compile it using GCC.

I also need the file startup_ ARMxx. s, system_ ARMxx C

It would be even better if there were MCU engineering templates based on the Coretex-R52 core。

I don't know how to start