i386_io.h

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/*
 * Copyright (c) 2000 - Rosimildo da Silva.  All Rights Reserved.
 *
 * MODULE DESCRIPTION:
 *
 * IO Functions for the PC platform equivalent to DOS/Linux. They make
 * eaiser the porting of code from these platforms.
 *
 *  by: Rosimildo da Silva:  rdasilva@connecttel.com
 *
 */

#ifndef i386_io_h__
#define i386_io_h__

#define rtems_inb(port)                         \
({                                  \
        register int _inb_result;                   \
                            \
        __asm__ volatile ("xorl %%eax,%%eax; inb %%dx,%%al" :       \
            "=a" (_inb_result) : "d" (port));               \
        _inb_result;                            \
})

#define rtems_inw(port)                         \
({                                  \
        register int _inbw_result;                  \
                                    \
        __asm__ volatile ("xorl %%eax,%%eax; inw %%dx,%%ax" :       \
            "=a" (_inbw_result) : "d" (port));              \
        _inbw_result;                           \
})

#define rtems_outb(port, data)                      \
        __asm__ volatile ("outb %%al,%%dx" : : "a" (data), "d" (port))

#define rtems_outw(port, data)                      \
        __asm__ volatile ("outw %%ax,%%dx" : : "a" (data), "d" (port))

#define outp(port, val) rtems_outb(port,val)
#define inp(port)         rtems_inb(port)

#define outb(val, port) rtems_outb(port,val)
#define inb(port)         rtems_inb(port)

#define outb_p(val, port)   rtems_outb(port,val)
#define inb_p(port)       rtems_inb(port)

#define outportb(port,val)  rtems_outb(port,val)
#define inportb(port)   rtems_inb(port)

#define outw(val, port) rtems_outw(port,val)
#define inw(port)         rtems_inw(port)

#define cli()   __asm__ __volatile__("cli")
#define sti()   __asm__ __volatile__("sti");

#endif /* i386_io_h__ */