1. Although ARMv7 products are still frequently seen in the market, many students are learning ARMv7. However, ARMv7 has been around for 15 years, and ARMv8 has been out for 10 years.2. Despite ARM’s popularity, dominating various fields in the market with close ties to many programmers, there has yet to be a comprehensive Chinese book detailing ARMv8 architecture (Note: In 2021, there was a book on architecture programming).3. During the ARMv7 era, the entire ARM product line branched into three categories: Cortex-A for mobile, Cortex-M for embedded systems, and Cortex-R for real-time applications. It has been 15 years, and there haven’t been many R and M core IPs released; most of the focus has been on A.4. In 2021, Cortex-A branched out into three more categories: the high-performance X series, the mobile A series, and the server-focused Neoverse series.
5. ARM has major version numbers like V7/V8/V9, but there are also minor versions like 8.1/8.2/9.0/9.1/9.2. Starting from V8, it is expected to have a major version every 10 years, with almost yearly updates for minor versions since 2016.
6. Although there are many version numbers for ARM, not every version has corresponding products. ARM’s versions 8.0-8.7 mainly have products for 8.0 and 8.2.7. Starting in 2021, all new ARM core IPs are 9.0, and it seems there will no longer be core IPs for 8.0.
8. ARMv9 will completely phase out aarch32 (32-bit). While ARMv9 is forward compatible and retains aarch32 capabilities at EL0, the A710/A510 released in 2021 still supports aarch32. However, starting in 2022, new cores will no longer support aarch32, and it seems there won’t be any cores supporting aarch32 in the future.9. Stop constantly shouting about big.LITTLE; in fact, mainstream SOCs have long transitioned to the dynamIQ architecture.
10. Finally, here’s the “ARMv8/ARMv9 Basic Capability Test” question. Test your level; a score above 46 is considered passing. Scan the QR code below to start:
After answering, a related certificate will be automatically generated, and answers and explanations will be displayed automatically.
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