arch/x86/include/asm/shared/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)                                          \
   8 static __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                                                                         \
  14 static __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
  22 BUILDIO(b, b, u8)
  23 BUILDIO(w, w, u16)
  24 BUILDIO(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