Worked on the tianocore/edk2 repository to enhance boot-time reliability and cross-architecture PCI enumeration by addressing resource allocation during system startup. Developed logic in C for embedded systems that detects I/O space support per Root Bridge, ensuring that unsupported I/O Base Address Registers (BARs) are not allocated during PCI bus enumeration. This approach prevents resource conflicts and ensures endpoints receive only Memory BAR resources on platforms lacking I/O space support, improving compatibility across x86_64 and Arm architectures. The work focused on hardware abstraction and system programming, resulting in more robust and reliable platform initialization without introducing new features during the period.