io.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_SHARED_IO_H
 3#define _ASM_X86_SHARED_IO_H
 4
 5#include <linux/types.h>
 6
 7#define BUILDIO(bwl, bw, type)						\
 8static __always_inline void __out##bwl(type value, u16 port)		\
 9{									\
10	asm volatile("out" #bwl " %" #bw "0, %w1"			\
11		     : : "a"(value), "Nd"(port));			\
12}									\
13									\
14static __always_inline type __in##bwl(u16 port)				\
15{									\
16	type value;							\
17	asm volatile("in" #bwl " %w1, %" #bw "0"			\
18		     : "=a"(value) : "Nd"(port));			\
19	return value;							\
20}
21
22BUILDIO(b, b, u8)
23BUILDIO(w, w, u16)
24BUILDIO(l,  , u32)
25#undef BUILDIO
26
27#define inb __inb
28#define inw __inw
29#define inl __inl
30#define outb __outb
31#define outw __outw
32#define outl __outl
33
34#endif