43 lines
1 KiB
C
43 lines
1 KiB
C
#ifndef _IO_H
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#define _IO_H
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#include <stdint.h>
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static inline void outb(uint16_t port, uint8_t val) {
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asm volatile("outb %0, %1" : : "a"(val), "Nd"(port));
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}
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static inline void outw(uint16_t port, uint16_t val) {
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asm volatile("outw %0, %1" : : "a"(val), "Nd"(port));
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}
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static inline void outl(uint16_t port, uint32_t val) {
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asm volatile("outl %0, %1" : : "a"(val), "Nd"(port));
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}
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static inline uint8_t inb(uint16_t port) {
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uint8_t ret;
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asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
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return ret;
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}
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static inline uint16_t inw(uint16_t port) {
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uint16_t ret;
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asm volatile("inw %1, %0" : "=a"(ret) : "Nd"(port));
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return ret;
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}
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static inline uint32_t inl(uint16_t port) {
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uint32_t ret;
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asm volatile("inl %1, %0" : "=a"(ret) : "Nd"(port));
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return ret;
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}
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static inline void io_wait() {
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asm volatile("outb %%al, $0x80" : : "a"(0));
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}
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static inline void cli() {
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asm volatile("cli");
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}
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static inline void sti() {
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asm volatile("sti");
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}
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static inline uint64_t rdtsc()
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{
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uint64_t ret;
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asm volatile ( "rdtsc" : "=A"(ret) );
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return ret;
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}
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#endif
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