Affinity Levels

Detailed Explanation of Embedded Linux Boot Process

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Detailed Explanation of Embedded Linux Boot Process

Kernel Boot Stage 1. bootsect stage 2. setup stage 3. head.S stage 4. main.c stage Init Stage 1. Determine User Login Mode In “/etc/inittab”, the following login modes are listed: single-user maintenance mode, multi-user without network mode, text interface multi-user mode, and X-Windows multi-user mode. The single-user maintenance mode (runlevel 1) is similar to “Safe … Read more

Understanding MPIDR_EL1 Register Affinity in ARMv8/ARMv9

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Understanding MPIDR_EL1 Register Affinity in ARMv8/ARMv9

The official documentation (<span>ARM ARM</span>) introduction is as follows: Translating the English related to <span>MPIDR_EL1</span>, it is as follows: Function: Provides an additional PE (process element) identification mechanism for scheduling in multi-processor systems. Attributes: MPIDR_EL1 is a 64-bit register. Field values: [63:40]: Reserved, RES0. [39:32]: Affinity level 3. For more information, refer to the description … Read more