Linux driver Development Common header files

There are a total of 32. h header files in the header file directory. There are 13 in the main directory, 4 in the ASM subdirectory, 10 in the Linux subdirectory, and 5 in the SYS subdirectory. The respective functions of these header files are as follows:

1. Home Directory

<a.out.h>:a.out header file that defines the a.out execution file format and some macros.
<CONST.H>: constant symbol header file, currently only defines the flag bits of the I_mode field in the I node.
<ctype.h>: A character type header file that defines some macros about character type judgments and conversions.
<ERRNO.H>: Error xwould file containing various error numbers in the system. (Linus introduced from the Minix).
<fcntl.h>: The file control header file, which is used for the operation of the file and its descriptor to control the definition of the constant symbol.
<signal.h>: Signal header file, define signal symbol constants, signal structure and signal operation function prototype.
<STDARG.H>: A standard parameter header file that defines a variable parameter list as a macro. The main description is a type (va_list) and 3 macros (Va_start, Va_arg, and Va_end) for vsprintf, vprintf, vfprintf functions.
<STDDEF.H>: standard definition header file, defines null, Offsetof (TYPE, MEMBER).
<string.h>: string header file that defines some embedded functions for string manipulation.
<TERMIOS.H>: terminal input and Output function header file, mainly defines the terminal interface to control the asynchronous communication port.
<time.h>: The time type header file, mainly defines the TM structure and some time-related function prototype.
<unistd.h>:linux a standard header file that defines various symbol constants and types, and declares various functions. For example, __library__ is defined, and the system call number and inline assembler _syscall0 () are included.
<utime.h>: User Time header file, defines the access and modification time structure, and the Utime () prototype.

2. Architecture Related header Files subdirectory include/asm

These header files primarily define data structures, macro functions, and variables that are closely related to the CPU architecture. A total of 4 files.
A <ASM/IO.H>:I/O header file that defines functions for I/O port operations in the form of an embedded assembler of macros.
<asm/memory.h>: Memory copy header file containing memcpy () embedded assembly macro function.
<asm/segment.h>: Segment operation header file, defines the embedded assembler function for the segment register operation.
<asm/system.h>: System header file, which defines the embedded assembly macros for setting or modifying descriptors/break gates, etc.

3, the Linux kernel dedicated header file subdirectory Include/linux

<linux/config.h>: Kernel configuration header file, define keyboard language and hard disk type (Hd_type) options.
<linux/fdreg.h>: Floppy drive header file containing some definitions of the floppy disk controller parameters.
<linux/fs.h>: File system header file, definition file table structure (File,buffer_head,m_inode, etc.).
<LINUX/HDREG.H>: Hard disk parameter header file, which defines information such as access to the hard disk register port, status code, and partition table.
The <linux/head.h>:head header file defines the simple structure of the segment descriptor, and several selection constants.
<linux/kernel.h>: Kernel header file, contains some of the kernel common functions of the prototype definition.
<LINUX/MM.H>: Memory management header file containing page size definitions and some page release function prototypes.
<linux/sched.h>: Dispatcher header file, defines the task structure task_struct, the initial task 0 data, and some of the descriptor parameter settings and get the embedded Assembler function macro statement.
<LINUX/SYS.H>: The system calls the header file, which contains 72 system calls to the C function handler, beginning with "Sys_".
The <linux/tty.h>:tty header file defines the parameters and constants for Tty_io, serial communication.

4, System-specific data structure sub-directory Include/sys

<sys/stat.h>: File status header file, containing file or file system state structure stat{} and constants.
<SYS/TIMES.H>: Defines a process run time structure TMS and The Times () function prototype.
<sys/types.h>: A type header file that defines the basic system data type.
<sys/utsname.h>: System name Structure header file.
<sys/wait.h>: Wait for the calling header file to define the system call Wait () and Waitpid () and the associated constant symbol.

#include <Linux/***.h>//is looking for source files under Linux-2.6.29/include/linux.
#include <asm/***.h>//is looking for source files under Linux-2.6.29/arch/arm/include/asm.
#include <mach/***.h>//is looking for source files under Linux-2.6.29/arch/arm/mach-s3c2410/include/mach.
#include <plat/regs-adc.h>//in Linux-2.6.31_tx2440a20100510\linux-2.6.31_tx2440a\arch\arm\plat-s3c\include\ Plat
#include <linux/module.h>//most basic files, support dynamic add and unload modules. Hello World Driver wants this one file on it
#include <linux/fs.h>//contains definitions of file operations related structs, such as the famous struct file_operations, which contains the definition of struct inode, M Inor, Major's header file.
#include <linux/errno.h>//contains a macro definition of the return value so that the user program can output the error message with Perror.
#include <linux/types.h>//definitions for some special types, such as dev_t, off_t, pid_t. Most of these types are unsigned int, which is changed through a series of typedef. , just for the convenience of reading.
#include <linux/cdev.h>//CDEV The structure of the character device and the definition of a series of operation functions. Contains the definitions of the CDEV structure and related functions.
#include <linux/wait.h>//Queue Related header file//kernel wait queue, it contains the spin lock header file
#include <linux/init.h>//initialization header file
#include <linux/kernel.h>//drivers to be written to kernel, kernel-related header files
#include <linux/slab.h>//contains the definition of Kcalloc, Kzalloc memory allocation function.
#include <linux/uaccess.h>//contains a function definition for kernel access to user process memory addresses such as Copy_to_user, Copy_from_user, and so on.
#include <linux/device.h>//contains definitions of device, class, and other structures
#include <linux/io.h>//contains definitions of functions such as Ioremap, Iowrite and other kernel access IO memory.
#include <linux/miscdevice.h>//contains the definition of miscdevice structure and related operation functions.
#include <linux/interrupt.h>//Use the header files that must be interrupted
#include <mach/irqs.h>//Use the header files that must be interrupted
#include <asm/bitops.h>//contains set_bit-bit operation functions, which are available when the input subsystem is implemented.
#include <linux/semaphore.h>//The header file required for semaphore usage
#include <linux/spinlock.h>//spin lock
#include <linux/sched.h>//kernel wait queue to use the Task_normal, task_interruptible contained in this header file
#include <linux/kfifo.h>//fifo ring queue
#include <linux/timer.h>//Core timers
#include <linux/input.h>//Interrupt Handling
#include <linux/delay.h>//delay header file
#include <asm/irq.h>//processor-related interrupts
#include <linux/interrupt.h>//operating system interrupt
#include <asm/uaccess.h>//processor-related portals
#include <asm/arch/regs-gpio.h>//processor-related IO port operation
#include <mach/regs-gpio.h>//Ibid.
#include <asm/hardware.h>//processor-related hardware
#include <mach/hardware.h>//Ibid.
#include <linux/poll.h>//Polling files
#include <linux/gpio.h>//OS-related IO port files
#include <stdio.h>//Standard input/output
#include <stdlib.h>//Standard library
#include <unistd.h>//unix Standard
#include <sys/ioctl.h>//io Control

Linux driver Development Common header files