Kernel Functions for Drivers                              inb(9F)



NAME
     inb, inw, inl, repinsb, repinsw, repinsd - read from an  I/O
     port

SYNOPSIS
     #include 
     #include 

     unsigned char inb(int port);


     unsigned short inw(int
     port);


     unsigned long inl(int port);


     void repinsb(int port, unsigned char *addr, int
     count);


     void repinsw(int port, unsigned short *addr, int
     count);


     void repinsd(int port, unsigned long *addr, int
     count);


INTERFACE LEVEL
     The functions described here are obsolete.  For  the  inb(),
     inw(), and inl() functions, use, respectively, ddiget8(9F),
     ddiget8(9F),  and  ddiget8(9F)  instead.  For   repinsb(),
     repinsw(),       andrepinsl(),       use,      respectively,
     ddirepget8(9F),  ddirepget8(9F),  and   ddirepget8(9F)
     instead.

PARAMETERS
     port     A valid I/O port address.


     addr     The address of a buffer where the  values  will  be
              stored.


     count    The number of values to be read from the I/O port.


DESCRIPTION
     These routines read data of various sizes from the I/O  port
     with the address specified by port.



SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                              inb(9F)



     The inb(), inw(), and inl() functions read 8 bits, 16  bits,
     and  32  bits  of data respectively, returning the resulting
     values.


     The repinsb(), repinsw(), and repinsd() functions read  mul-
     tiple  8-bit, 16-bit, and 32-bit values, respectively. count
     specifies the number of values to be read. A  pointer  to  a
     buffer  will receive the input data; the buffer must be long
     enough to hold count values of the requested size.

RETURN VALUES
     The inb(), inw(), and inl() functions return the value  that
     was read from the I/O port.

CONTEXT
     These functions may be called from user, interrupt, or  ker-
     nel context.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Architecture                 x86                         
    
     Stability Level               Obsolete                   
    


SEE ALSO
     isa(4),    attributes(5),    ddiget8(9F),     ddiget8(9F),
     ddiget8(9F),       ddirepget8(9F),      ddirepget8(9F),
     ddirepget8(9F), outb(9F)


     Writing Device Drivers














SunOS 5.11          Last change: 16 Jan 2006                    2