ARM核的中断支持
重点引用了这篇文章:
ARM处理器有7种操作模式
重点引用了这篇文章:
http://www.iti.uni-stuttgart.de/~radetzki/Seminar06/08_report.pdf
ARM处理器有7种操作模式
User (usr) |
Normal program execution mode |
FIQ (fiq) |
Fast data processing mode |
IRQ (irq) |
For general purpose interrupts |
Supervisor (svc) |
A protected mode for the operating system |
Abort (abt) |
A protected mode for the operating system |
Undefined (und) |
For undefined instructions |
System (sys |
Operating system privileged mode |