Interrupts

转自:http://blog.csdn.net/tianlesoftware/article/details/6461207 一. 进程Context 定义 当一个进程在执行时, CPU的所有寄存器中的值.进程的状态以及堆栈中的内容,比如各个变量和数据,包括所有的寄存器变量.进程打开的文件.内存信息等.这些信息被称为该进程的上下文(Context). 一个进程的Context可以分为三个部分:用户级上下文.寄存器上下文以及系统级上下文: (1)用户级上下文: 正文.数据.用户堆栈以及共享存储区:

The SGPIO output pins SGPIO14 and SGPIO15 can trigger a GPDMA request SGPIO pins SGPIO14 and SGPIO15 can trigger a GPDMA request. < Output = '1' > To generate the request, program a pulse in the bit stream of slice 14 or 15. For example, use a patte

STM32 F4 General-purpose Timers for Periodic Interrupts

The Intel documentation classifies interrupts and exceptions as follows: 1. Interrupts: Maskable interrupts: All Interrupt ReQuests (IRQs) issued by I/O devices give rise to maksable interrupts. A maskable interrupt can be in two states: maksed or un

中断分为同步和异步: 同步中断是指当指令时由cpu控制单元产生的,因为只有在一条指令终止执行后CPU才会产生中断:我们称为异常 异常由程序错误产生,此时会发送一个信号处理异常,或者由内核必须处理的异常条件产生此时比如缺页或者 对内核服务请求(int 或者 sysenter指令) : 异步中断是指由其他硬件设备和定时器产生的中断信号:我们称为中断 每个进程的thread_info 描述符与thread_union 中内核栈紧邻,如果thread_union 结构大小为8KB.那么当前进程的内核栈被

An interrupt is usually defined as an event that alters the sequence of instructions executed by a processor. Such events correspond to electrical signals generated by hardware circuits both inside and outside chip. Interrupts are often divided into

STM32F4 External interrupts Each STM32F4 device has 23 external interrupt or event sources. They are split into 2 sections. First interrupt section is for external pins (P0 to P15) on each port, and other section is for other events, like RTC interru

BACKGROUND This relates to the operation of software under a virtualization technology (VT) environment. In a VT environment, such as the Intel VT or AMD Pacifica, an infrastructure may be provided to execute applications in an isolated and protected

在/proc文件系统下,又两个文件提供了中断的信息. /proc/interrupts 文件中列出当前系统使用的中断的情况,所以某个中断处理没有安装,是不会显示的.哪怕之前安装过,被卸载了. 从左到右分别是, irq的序号, 在各自cpu上发生中断的次数,可编程中断控制器,设备名称(request_irq的dev_name字段) $cat /proc/interrupts            CPU0       CPU1         0: 2822434225          0