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c552e25bd7
* Add C sample Sample was incorrectly being identified as C++ * Changed asm.h license to the Unlicense * Changed asm.h license to Apache 2.0
28 lines
580 B
C
28 lines
580 B
C
/* CarbonOS System/Kernel
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* Copyright 2015-2017 David Aylaian
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* Licensed under Apache 2.0: https://github.com/DavidAylaian/CarbonOS/blob/master/LICENSE.md
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*/
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#ifndef ASM_H
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#define ASM_H
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#include <stdint.h>
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// macros for enabling and disabling interrupts
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#define enable() asm("sti");
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#define disable() asm("cli");
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// inb instruction
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uint8_t inb (uint16_t port) {
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uint8_t val;
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asm volatile ("inb %0, %1" : "=a"(val): "Nd"(port));
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return val;
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}
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// outb instruction
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void outb (uint16_t port, uint8_t val) {
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asm volatile ("outb %1, %0" : : "a"(val), "Nd"(port));
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}
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#endif
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