context switch - Task Switching in Arm

We will discuss how the hardware was designed to support this operation, features that impact the context switching implementation such as the Floating Point Unit (FPU), and common pitfalls seen when porting an RTOS to a platform.

This example demonstrates simple real-time kernel context switching operations between two threads using MPU regions that are available in Arm Cortex-M processors.

I am reading the Arm Architecture Reference Manual and I think I have some theoritical questions. Well at first I am confused whether by context switching we mean task switching? Secondly, by h...

2019/10/3 context switch 到底在做甚麼? 簡單的說，'context switch' 就是切換 'context'。 而所謂的 'context'，指的就是當下 CPU registers 的內容。 因為當程式在執行時，所做的事情就是從 memory 中讀取指令和依照指令做計算。

曾經我對 PendSV 中斷的存在意義感到疑惑，比如說，為什麼我們不能像 mini-arm-os 一樣在 systick_handler 裡面進行 Context Switch 呢？