uart_insert_char(9) [centos man page]

UART_INSERT_CHAR(9)						 16x50 UART Driver					       UART_INSERT_CHAR(9)

NAME

       uart_insert_char - push a char to the uart layer

SYNOPSIS

       void uart_insert_char(struct uart_port * port, unsigned int status, unsigned int overrun, unsigned int ch, unsigned int flag);

ARGUMENTS

       port
	   corresponding port

       status
	   state of the serial port RX buffer (LSR for 8250)

       overrun
	   mask of overrun bits in status

       ch
	   character to push

       flag
	   flag for the character (see TTY_NORMAL and friends)

DESCRIPTION

       User is responsible to call tty_flip_buffer_push when they are done with insertion.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						       UART_INSERT_CHAR(9)

OUTB(2) 						     Linux Programmer's Manual							   OUTB(2)

NAME

       outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p - port I/O

SYNOPSIS

       #include <sys/io.h>

       unsigned char inb(unsigned short int port);
       unsigned char inb_p(unsigned short int port);
       unsigned short int inw(unsigned short int port);
       unsigned short int inw_p(unsigned short int port);
       unsigned int inl(unsigned short int port);
       unsigned int inl_p(unsigned short int port);

       void outb(unsigned char value, unsigned short int port);
       void outb_p(unsigned char value, unsigned short int port);
       void outw(unsigned short int value, unsigned short int port);
       void outw_p(unsigned short int value, unsigned short int port);
       void outl(unsigned int value, unsigned short int port);
       void outl_p(unsigned int value, unsigned short int port);

       void insb(unsigned short int port, void *addr,
		  unsigned long int count);
       void insw(unsigned short int port, void *addr,
		  unsigned long int count);
       void insl(unsigned short int port, void *addr,
		  unsigned long int count);
       void outsb(unsigned short int port, const void *addr,
		  unsigned long int count);
       void outsw(unsigned short int port, const void *addr,
		  unsigned long int count);
       void outsl(unsigned short int port, const void *addr,
		  unsigned long int count);

DESCRIPTION

       This  family  of  functions  is	used  to do low-level port input and output.  The out* functions do port output, the in* functions do port
       input; the b-suffix functions are byte-width and the w-suffix functions word-width; the _p-suffix functions pause until the I/O completes.

       They are primarily designed for internal kernel use, but can be used from user space.

       You must compile with -O or -O2 or similar.  The functions are defined as inline macros, and will not be substituted in	without  optimiza-
       tion enabled, causing unresolved references at link time.

       You  use  ioperm(2)  or	alternatively  iopl(2) to tell the kernel to allow the user space application to access the I/O ports in question.
       Failure to do this will cause the application to receive a segmentation fault.

CONFORMING TO

       outb() and friends are hardware-specific.  The value argument is passed first and the port argument is passed second, which is the opposite
       order from most DOS implementations.

SEE ALSO

       ioperm(2), iopl(2)

Linux								    2017-09-15								   OUTB(2)