ARM seven exception models

ARM supports seven types of exception, and a privileged processing mode for each type. The seven types

of exception are:

ARM 支持七种类型的异常处理模式，每一种类型都是特权处理，这七种模式分别是：

•reset

加电重启

•attempted execution of an Undefined instruction

CPU 执行到没有定义的指令

•software interrupt (SWI) instructions, can be used to make a call to an operating system

软中断。用来调用os kernel

•Prefetch Abort, an instruction fetch memory abort

指令abort

•Data Abort, a data access memory abort

数据 abort

•IRQ, normal interrupt

普通中断

•FIQ, fast interrupt.

快速中断