mango/arch/x86_64/ports.c

#include <stdint.h>

uint8_t inportb(uint16_t port)
{
	uint8_t data;
	__asm__ __volatile__("inb %1, %0" : "=a"(data) : "dN"(port));
	return data;
}

void outportb(uint16_t port, uint8_t data)
{
	__asm__ __volatile__("outb %1, %0" : : "dN"(port), "a"(data));
}

uint16_t inportw(uint16_t port)
{
	uint16_t data;
	__asm__ __volatile__("inw %1, %0" : "=a"(data) : "dN"(port));
	return data;
}

void outportw(uint16_t port, uint16_t data)
{
	__asm__ __volatile__("outw %1, %0" : : "dN"(port), "a"(data));
}

uint32_t inportl(uint16_t port)
{
	uint32_t data;
	__asm__ __volatile__("inl %%dx, %%eax" : "=a"(data) : "dN"(port));
	return data;
}

void outportl(uint16_t port, uint32_t data)
{
	__asm__ __volatile__("outl %%eax, %%dx" : : "dN"(port), "a"(data));
}

void outportsw(uint16_t port, void *data, uint32_t size)
{
	__asm__ __volatile__("rep outsw" : "+S"(data), "+c"(size) : "d"(port));
}

void inportsw(uint16_t port, unsigned char *data, unsigned long size)
{
	__asm__ __volatile__("rep insw"
	                     : "+D"(data), "+c"(size)
	                     : "d"(port)
	                     : "memory");
}