hal.h File Reference

Header file for Hardware Abstraction Layer -> Source from GoGX OS. More...

#include <stdint.h>
#include <basics.h>

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Macros
#define	pic1_command   0x20
#define	pic1_data   0x21
#define	pic2_command   0xA0
#define	pic2_data   0xA1

Functions
void	init_hardware_abstraction_layer ()
	Initializes HAL by remapping the PIC interrupts to avoid conflicts.
void	outb (int16 port, int8 value)
	Output a byte to the specified I/O port.
int8	inb (int16 port)
	Read a byte from the specified I/O port.
void	outw (int16 portNumber, int16 data)
	Output a 16-bit value to the specified I/O port.
int16	inw (int16 portNumber)
	Read a 16-bit value from the specified I/O port.
int32	inl (int16 portNumber)
	Read a 32-bit value from the specified I/O port.
void	outl (int16 portNumber, int32 data)
	Output a 32-bit value to the specified I/O port.
void	io_wait ()
	Perform an I/O wait operation.

Detailed Description

Header file for Hardware Abstraction Layer -> Source from GoGX OS.

Author

Pradosh (prado.nosp@m.shga.nosp@m.me@gm.nosp@m.ail..nosp@m.com)

Version

v1.0

Date

2022-08-03

Copyright

Copyright Pradosh (c) 2022

Definition in file hal.h.

Macro Definition Documentation

pic1_command

#define pic1_command   0x20

Definition at line 15 of file hal.h.

pic1_data

#define pic1_data   0x21

Definition at line 16 of file hal.h.

pic2_command

#define pic2_command   0xA0

Definition at line 17 of file hal.h.

pic2_data

#define pic2_data   0xA1

Definition at line 18 of file hal.h.

Function Documentation

inb()

int8 inb

(

int16

port

)

Read a byte from the specified I/O port.

This function reads a byte from the specified I/O port using inline assembly.

Parameters

port	The 16-bit I/O port number.

Returns

The 8-bit value read from the port.

inl()

int32 inl

(

int16

portNumber

)

Read a 32-bit value from the specified I/O port.

This function reads a 32-bit value from the specified I/O port using inline assembly.

Parameters

portNumber

The 16-bit I/O port number.

Returns

The 32-bit value read from the port.

inw()

int16 inw

(

int16

portNumber

)

Read a 16-bit value from the specified I/O port.

This function reads a 16-bit value from the specified I/O port using inline assembly.

Parameters

portNumber

The 16-bit I/O port number.

Returns

The 16-bit value read from the port.

io_wait()

void io_wait

(

)

Perform an I/O wait operation.

This function performs an I/O wait operation using inline assembly. It is used to add a small delay in I/O operations.

outb()

void outb	(	int16	port,
		int8	value )

Output a byte to the specified I/O port.

This function sends a byte to the specified I/O port using inline assembly.

Parameters

port	The 16-bit I/O port number.
value	The 8-bit value to be sent to the port.

outl()

void outl	(	int16	portNumber,
		int32	data )

Output a 32-bit value to the specified I/O port.

This function sends a 32-bit value to the specified I/O port using inline assembly.

Parameters

portNumber	The 16-bit I/O port number.
data	The 32-bit value to be sent to the port.

outw()

void outw	(	int16	portNumber,
		int16	data )

Output a 16-bit value to the specified I/O port.

This function sends a 16-bit value to the specified I/O port using inline assembly.

Parameters

portNumber	The 16-bit I/O port number.
data	The 16-bit value to be sent to the port.