linux kernel support

1.SoC Linux Bottom drive composition and status To allow Linux to run on a brand new arm SOC, there are a number of underlying support, such as timer beats, interrupt controllers, SMP booting, CPU HotPlug, and the underlying GPIO, clock, Pinctrl, and DMA hardware packages. Timer beats, interrupt controllers, SMP boot, and CPU hotplug are relatively not as clutte

unlocking.3. The same tasklet cannot be executed at the same time. So shared data in the same tasklet does not need to be protected.4. When sharing data in different classes of tasklet, one of the tasklet gets locked. Do not prohibit the operation of other Tasklet, because the same processor will not have tasklet mutually preemption situation5. Soft interrupts of the same type or non-identical type when sharing data, do not prohibit the lower half, because there will be no soft interrupts on th

W.richard Stevens, advanced programming in the UNIX environment,addision wesley,19924 W.richard Stevens, UNIX Network programming, Prentic Hall, 19985 Maurice J. Bach, the Design of the UNIX Operating System, prentic Hall, 19906 Linux Device Driver, O ' Reilly7 Ori Pomerantz, Linux Kernel Module Programming Guide, 1999A few understandings and summaries of

after so many years of development, but also has some of the characteristics of the microkernel. (embodies the principle of Linux practical Supremacy) The main features are: Support dynamic loading kernel module support symmetric multi-processing (SMP) kernel can preempt (p

Linux kernel universal queue implementation KfifoLocation: kernel/kififo.cUse required include header file # include 1. Create queue (dynamically created)int Kfifo_alloc (struct kififo *fifo, unsigned int size, gfp_t gfp_mask);The function creates and initializes a FIFO of size, and the kernel uses the Gfp_mask identit

instructions in the critical section are executed continuously, and may be executed in the critical section half way, Because the scheduler is preempted or interrupted, the CPU does not continue to execute within the critical zone, which means the execution is interrupted.But that still guarantees the avoidance of competitive conditions, the reason is that if a process outside of the interrupted process is scheduled, the process will have to access the critical section, the lock or semaphore, a

8.211: Prepare for the transplantGet Samsung ported kernel, create Si project, add to virtual machine, modify makefile Arch and cross_compile modify results as followsARCH = ArmCross_compile =/usr/local/arm/arm-2009q3/bin/arm-none-linux-gnueabi-Then try to configure, (in arch/configs/to find the closest to their own development board, here is the choice of smdkv210_android_defconfig) to get the. config file

Linux kernel upgrade one, Linux kernel overview Linux is an integrated kernel (monolithic kernel) system. The device driver has full access to the hardware. Device drivers within

I. measurement time difference 1. There is a constant "HZ" in the Linux kernel, and Hz is a constant unrelated to the architecture. It is used to configure the number of system interruptions per second. The value range is 50-1200 (meaning 50 to 1200 interruptions per second). The default value is 1000 on the X86 platform. 2. The global variable jiffies (unsigned long ). Every time a clock is interrupted, th

The Linux kernel is one of the important tasks of the operating system for process management.This experiment is an overview of the kernel's process of creating a new process.For simplicity, create a process using fork and then user state. The code is as follows:Here is the preparation??? CD LINUXKERNELRM-RF menugit clone https://github.com/mengning/menu.gitcd menumv test_fork.c test.cmake rootfsOpen GDB fo

/audio. c 11. Power Management:Kernel/ARCH/ARM/Mach-goldfish/PM. c 12. Clock management:Kernel/ARCH/ARM/Mach-goldfish/Timer. c The following section from http://www.kandroid.org/android_pdk/intro_source_code.htmlLinux Kernel The android Linux kernel provided des enhancements to the Linux 2.6

First, let's talk about how this problem came about. (When analyzing a technology, we should first consider what problems it wants to solve, or when learning new knowledge, what is the purpose of this knowledge ). When compiling the kernel, I found a file named vmlinux. LDS. s under the arch/ARM/kernel directory. At first glance, do you want to compile a file? It seems that it is not. So what does it do?

Recommended blog posts:Linux Kernel "problem Gate"-learning issues and experience highlights Recommended download:Methodology of essence edition of "Cultivation of Linux kernel" Makefile is not make love I used to spend four years in school and didn't learn anything. Every day, I skip classes, surf the Internet, play games, and go to bed. When I graduated fr

Then after the Linux kernel 2.6, can not directly export sys_call_table address, we want to get the address of the system call table, so as to achieve the interception of system calls.First put on my implementation of the good code, and then to explain it.Modu.c#include #include#include#include#include#include#includestring.h>#include#include#include#includeModule_license ("Dual BSD/GPL"); #define_debug#ifd

Tags: support port net art init hot ade dep alsMakefile not make LoveOnce in school, mixed for four years, did not learn anything, every day is skipping classes, surfing the internet, playing games, sleeping. When I graduated, I was told that I had no idea of makefile, but I felt a sense of embarrassment when I said make love.It's no exaggeration to say that kconfig and makefile are the two files we rely on when we browse the