66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
#ifndef FROSTBYTE_PORTS_H
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#define FROSTBYTE_PORTS_H
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#include "types.h"
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static inline void outb(uint16 port, uint8 value)
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{
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__asm__ volatile("outb %0, %1" : : "a"(value), "Nd"(port));
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}
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static inline uint8 inb(uint16 port)
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{
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uint8 value;
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__asm__ volatile("inb %1, %0" : "=a"(value) : "Nd"(port));
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return value;
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}
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static inline void outw(uint16 port, uint16 value)
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{
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__asm__ volatile("outw %0, %1" : : "a"(value), "Nd"(port));
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}
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static inline uint16 inw(uint16 port)
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{
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uint16 value;
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__asm__ volatile("inw %1, %0" : "=a"(value) : "Nd"(port));
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return value;
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}
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static inline void ioWait(void)
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{
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outb(0x80, 0);
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}
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static inline uint64 readFlags(void)
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{
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uint64 flags;
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__asm__ volatile("pushfq; popq %0" : "=r"(flags));
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return flags;
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}
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static inline void enableInterrupts(void)
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{
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__asm__ volatile("sti");
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}
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static inline uint64 saveAndDisableInterrupts(void)
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{
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uint64 flags = readFlags();
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__asm__ volatile("cli");
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return flags;
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}
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static inline void restoreInterrupts(uint64 flags)
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{
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if (flags & (1u << 9))
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__asm__ volatile("sti");
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}
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static inline void halt(void)
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{
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__asm__ volatile("hlt");
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}
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#endif
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