硬件中断由外部设备触发,用于处理设备请求(如键盘输入);软件中断由程序指令引发,用于系统调用(如INT指令)。应用不同,硬件中断处理实时事件,软件中断实现内核服务。 1. **中断来源**:硬件中断由外部设备(如键盘、磁盘)通过物理信号触发;软件中断由程序执行特定指令(例如INT、SWI)主动发起。2. **触发机制**:硬件中断...
What is hardware interrupt? What is software interrupt? What is exception? Please tell me all you know about interrupt.相关知识点: 试题来源: 解析 硬件中断是由外部设备触发的信号,用于请求处理器处理事件;软件中断是通过指令主动引发的中断,用于系统调用等;异常是处理器执行指令时遇到的意外错误或特殊情况(...
When implementing any of the DMA request lines (sys_ndmareq[3..0]) on the DM3730, does this interrupt go directly to the DMA controller to process the next frame of data (entirely within hardware) or does it interrupt software? Then software intervenes by setting registers in the DM...
Concepts well known in software engineering are reiterated, but they are emphasized in relation to the hardware-software interface. The concept of an interrupt service routine is shown to be at variance with the requirements of secure program design. The alternative concept of switching to another ...
Interrupt vectors 0 to 31 are usually reserved for microprocessor interrupts. The remainder can be used for hardware or software interrupts. The interrupt type number determines its place within the interrupt vector table and its priority (with the exception of the NMI interrupt (2), but has the...
The interrupt does this without waiting for the current program to finish. It is unconditional and immediate which is why it is called an interrupt - it interrupts the current action of the processor.A software interrupt, on the other hand is as its name suggests nothing to do with hardware...
systems. They allow events to occur asynchronously (not as part of any executing program) and notify the CPU that it should take some action. These types of interrupts can cause the CPU to stop whatever it was doing and execute some other function, known as an “interrupt service routine”...
The Interrupt Channel block receives interrupt requests from FPGA logic or the Memory Channel block, arbitrates the requests, and triggers an event-driven software task to the Task Manager block. You can connect up to 16 devices to the interrupt controller, with one interrupt per device. The ...
Many function modules require special parameterization software which is supplied with the function module with the corresponding documentation. Hardware interrupt-triggering events can only be configured together with STEP 7 and the parameterization software. ...
1.7 Approaches to Virtualization and Paravirtualization 在硬件虚拟化之前,早期处理器架构缺少对虚拟化的支持,通过以下两种方法解决: Full (software) virtualization: Hypervisor的设计最大化硬件兼容,也无需修改操作系统,将在3.2中介绍 Paravirtualization: 修改操作系统/设备驱动,添加platform-specific的功能,将在3.3中介...