arch/i386/bits/io.h

   1 static __inline void outb(unsigned char __val, unsigned short __port)
   2 {
   3         __asm__ volatile ("outb %0,%1" : : "a" (__val), "dN" (__port));
   4 }
   5
   6 static __inline void outw(unsigned short __val, unsigned short __port)
   7 {
   8         __asm__ volatile ("outw %0,%1" : : "a" (__val), "dN" (__port));
   9 }
  10
  11 static __inline void outl(unsigned int __val, unsigned short __port)
  12 {
  13         __asm__ volatile ("outl %0,%1" : : "a" (__val), "dN" (__port));
  14 }
  15
  16 static __inline unsigned char inb(unsigned short __port)
  17 {
  18         unsigned char __val;
  19         __asm__ volatile ("inb %1,%0" : "=a" (__val) : "dN" (__port));
  20         return __val;
  21 }
  22
  23 static __inline unsigned short inw(unsigned short __port)
  24 {
  25         unsigned short __val;
  26         __asm__ volatile ("inw %1,%0" : "=a" (__val) : "dN" (__port));
  27         return __val;
  28 }
  29
  30 static __inline unsigned int inl(unsigned short __port)
  31 {
  32         unsigned int __val;
  33         __asm__ volatile ("inl %1,%0" : "=a" (__val) : "dN" (__port));
  34         return __val;
  35 }
  36
  37 static __inline void outsb(unsigned short __port, const void *__buf, unsigned long __n)
  38 {
  39         __asm__ volatile ("cld; rep; outsb"
  40                       : "+S" (__buf), "+c" (__n)
  41                       : "d" (__port));
  42 }
  43
  44 static __inline void outsw(unsigned short __port, const void *__buf, unsigned long __n)
  45 {
  46         __asm__ volatile ("cld; rep; outsw"
  47                       : "+S" (__buf), "+c" (__n)
  48                       : "d" (__port));
  49 }
  50
  51 static __inline void outsl(unsigned short __port, const void *__buf, unsigned long __n)
  52 {
  53         __asm__ volatile ("cld; rep; outsl"
  54                       : "+S" (__buf), "+c"(__n)
  55                       : "d" (__port));
  56 }
  57
  58 static __inline void insb(unsigned short __port, void *__buf, unsigned long __n)
  59 {
  60         __asm__ volatile ("cld; rep; insb"
  61                       : "+D" (__buf), "+c" (__n)
  62                       : "d" (__port));
  63 }
  64
  65 static __inline void insw(unsigned short __port, void *__buf, unsigned long __n)
  66 {
  67         __asm__ volatile ("cld; rep; insw"
  68                       : "+D" (__buf), "+c" (__n)
  69                       : "d" (__port));
  70 }
  71
  72 static __inline void insl(unsigned short __port, void *__buf, unsigned long __n)
  73 {
  74         __asm__ volatile ("cld; rep; insl"
  75                       : "+D" (__buf), "+c" (__n)
  76                       : "d" (__port));
  77 }