xref: /src/sys/arch/i386/include/pio.h

/*
 * Functions to provide access to i386 programmed I/O instructions.
 *
 *	$Id: pio.h,v 1.3.4.3 1993/12/19 10:39:23 mycroft Exp $
 */

static __inline u_char
inb(u_short port)
{
	u_char	data;
	__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
	return data;
}

static __inline void
insb(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\tinsb" :
			 : "d" (port), "D" (addr), "c" (cnt) : "D", "c");
}

static __inline u_short
inw(u_short port)
{
	u_short	data;
	__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
	return data;
}

static __inline void
insw(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\tinsw" :
			 : "d" (port), "D" (addr), "c" (cnt) : "D", "c");
}

static __inline u_int
inl(u_short port)
{
	u_int	data;
	__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
	return data;
}

static __inline void
insl(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\tinsl" :
			 : "d" (port), "D" (addr), "c" (cnt) : "D", "c");
}

static __inline void
outb(u_short port, u_char data)
{
	__asm __volatile("outb %0,%1" : : "a" (data), "d" (port));
}

static __inline void
outsb(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\toutsb" :
			 : "d" (port), "S" (addr), "c" (cnt) : "S", "c");
}

static __inline void
outw(u_short port, u_short data)
{
	__asm __volatile("outw %0,%1" : : "a" (data), "d" (port));
}

static __inline void
outsw(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\toutsw" :
			 : "d" (port), "S" (addr), "c" (cnt) : "S", "c");
}

static __inline void
outl(u_short port, u_int data)
{
	__asm __volatile("outl %0,%1" : : "a" (data), "d" (port));
}

static __inline void
outsl(u_short port, void *addr, int cnt)
{
	__asm __volatile("cld\n\trep\n\toutsl" :
			 : "d" (port), "S" (addr), "c" (cnt) : "S", "c");
}