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51 lines
1.1 KiB
51 lines
1.1 KiB
#ifndef KERNEL_IO_H
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#define KERNEL_IO_H
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#include <stdint.h>
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/**
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* Wrapper function that reads a byte from the specified I/O port.
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*
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* "=a" (result) - put al register in the `result` var when finished
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* "d" (port) - load edx with the specified `port`
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*
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* @param port
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* @return the read byte
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*/
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uint8_t io_byte_in(uint16_t port);
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/**
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* Wrapper function that writes a byte to the specified I/O port.
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*
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* "a" (data) - load eal with `data`
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* "d" (port) - load edx with `port`
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*
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* @param port
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* @param data
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*/
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void io_byte_out(uint16_t port, uint8_t data);
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/**
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* Wrapper function that reads a word from the specified I/O port.
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*
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* "=a" (result) - put eax register in the `result` var when finished
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* "d" (port) - load edx with the specified `port`
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*
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* @param port
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* @return the read word
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*/
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uint16_t io_word_in(uint16_t port);
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/**
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* Wrapper function that writes a word to the specified I/O port.
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*
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* "a" (data) - load eax with `data`
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* "d" (port) - load edx with `port`
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*
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* @param port
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* @param data
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*/
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void io_word_out(uint16_t port, uint16_t data);
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#endif //KERNEL_IO_H
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