📕Introduction to ARM Architecture
🏮Definition and Development: The ARM architecture is a Reduced Instruction Set Computer (RISC) processor architecture designed by Acorn Computer in the 1980s and is now maintained by ARM Holdings. It is widely used in mobile devices, embedded systems, and Internet of Things (IoT) devices.
🏮Series and Instruction Sets: It includes series such as ARMv6, ARMv7, and ARMv8, each with different instruction sets. For example, ARM Cortex-A is used in high-performance scenarios, ARM Cortex-M is for low-power embedded systems, and ARM Cortex-R is designed for real-time systems.
📕Characteristics of ARM Architecture
🏮RISC Features: The instruction set is concise, with a fixed length, ensuring high execution efficiency; it has a larger number of general-purpose registers, leading to frequent register operations; it uses load/store instructions for bulk memory data read/write, simplifying addressing modes.
🏮Other Advantages: It offers scalability and supports multi-core processors; it emphasizes low-power design, making it suitable for scenarios where battery life is critical, such as in mobile devices; it is easy to embed and integrate into various devices.
📕Learning Content for ARM Architecture
🏮Basic Concepts: Understand data types, such as byte, half-word, word, double-word, etc.; master storage formats, including big-endian and little-endian.
🏮Registers and Instruction Sets: Familiarize yourself with different types of registers and their purposes, such as general-purpose registers, program counters, status registers, etc.; learn the usage and functions of instruction sets like A64.
🏮Operating Modes and Exception Handling: Master the various operating modes of the kernel, such as user mode and interrupt mode, as well as the exception handling mechanisms.