During the Summ3r of h4ck internship at DSec, the speaker chose the topic of AMD PSP research and writing a dumper of PEI phase files. Given the ridiculous shortage of material on this topic on the Internet in any language, the speaker decided to talk about how the UEFI firmware works for devices containing PSP. The report will be from the perspective of a beginner rather than a seasoned researcher, where the speaker will tell you about the problems he encountered.