ide.c File Reference

#include "ide.h"
#include "../io/io.h"
#include "../lib/err.h"

Include dependency graph for ide.c:

Go to the source code of this file.

Functions
void	__ideinit (void)
	ideinit initializes the ide disk controller
void	__irsec (uint32_t lba, uint8_t *buff)
	irsec reads a single 512 byte sector from disk
void	__iwrt (uint32_t lba, uint8_t *buff)
	iwrt writes a single 512 byte sector to disk
int	__idesize (uint32_t *secs)
	idesize queries the ide drive for its total sector count

Function Documentation

__ideinit()

void __ideinit

(

void

)

ideinit initializes the ide disk controller

ideinit is a function that resets the ide controller, selects the master drive, and verifies the drive is present and ready

using ideinit is done with

#include "../fs/ide.h" //or just ide.h
ideinit();

See also

ffsinit(), irsec(), iwrt()

Definition at line 21 of file ide.c.

References assert, IDE_DEVICE, IDE_PRIMARY_CONTROL, IDE_STATUS, inb, and outb.

__idesize()

int __idesize

(

uint32_t *

secs

)

idesize queries the ide drive for its total sector count

idesize is a function that sends the IDENTIFY command to the ide drive and reads back the total number of lba28 sectors

Parameters

secs,a

pointer to store the total sector count

using idesize is done with

#include "../fs/ide.h" //or just ide.h
uint32_t total_secs;
if (idesize(&total_secs)) {
    //total_secs now holds the drive sector count
}

See also

disksize(), ideinit()

Definition at line 144 of file ide.c.

References IDE_COMMAND, IDE_DATA, IDE_DEVICE, IDE_STATUS, inb, inw, and outb.

__irsec()

void __irsec	(	uint32_t	lba,
		uint8_t *	buff )

irsec reads a single 512 byte sector from disk

irsec is a function that reads one sector from the ide drive at the given lba

Parameters

lba,the	logical block address to read from
buff,the	512 byte buffer to store the read data

using irsec is done with

#include "../fs/ide.h" //or just ide.h
uint8_t sector[512];
irsec(0, sector); //read the boot sector

See also

iwrt(), idesize()

Definition at line 59 of file ide.c.

References assert, IDE_COMMAND, IDE_DATA, IDE_DEVICE, IDE_LBA_HIGH, IDE_LBA_LOW, IDE_LBA_MID, IDE_SECTORS, IDE_STATUS, inb, inw, NULL, and outb.

__iwrt()

void __iwrt	(	uint32_t	lba,
		uint8_t *	buff )

iwrt writes a single 512 byte sector to disk

iwrt is a function that writes one sector to the ide drive at the given lba

Parameters

lba,the	logical block address to write to
buff,the	512 byte buffer containing the data to write

using iwrt is done with

#include "../fs/ide.h" //or just ide.h
uint8_t sector[512];
iwrt(1, sector); //write to sector 1

See also

irsec(), fswrite()

Definition at line 99 of file ide.c.

References assert, IDE_COMMAND, IDE_DATA, IDE_DEVICE, IDE_LBA_HIGH, IDE_LBA_LOW, IDE_LBA_MID, IDE_SECTORS, IDE_STATUS, inb, NULL, outb, and outw.