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#ifndef ARCH_IO_H
#define ARCH_IO_H
#include <stdint.h>
/* Helper functions for directly doing I/O */
extern inline uint8_t inb(uint16_t port)
{
uint8_t result;
__asm__ __volatile__ (
"inb %w1,%0"
:"=a" (result)
:"Nd" (port));
return result;
}
extern inline uint16_t inw(uint16_t port)
{
uint16_t result;
__asm__ __volatile__ (
"inw %w1,%0"
:"=a" (result)
:"Nd" (port));
return result;
}
extern inline uint32_t inl(uint32_t port)
{
uint32_t result;
__asm__ __volatile__ (
"inl %w1,%0"
:"=a" (result)
:"Nd" (port));
return result;
}
extern inline void outb (uint8_t value, uint16_t port)
{
__asm__ __volatile__ (
"outb %b0,%w1"
:
:"a" (value), "Nd" (port));
}
extern inline void outw (uint16_t value, uint16_t port)
{
__asm__ __volatile__ (
"outw %w0,%w1"
:
:"a" (value), "Nd" (port));
}
extern inline void outl (uint32_t value, uint16_t port)
{
__asm__ __volatile__ (
"outl %0,%w1"
:
:"a" (value), "Nd" (port));
}
#endif /* ARCH_IO_H */
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