ide.h File Reference

#include "../lib/types.h"

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Macros
#define	IDE_DATA   0x1F0
#define	IDE_PRIMARY_CONTROL   0x3F6
#define	IDE_ERROR   0x1F1
#define	IDE_SECTORS   0x1F2
#define	IDE_LBA_LOW   0x1F3
#define	IDE_LBA_MID   0x1F4
#define	IDE_LBA_HIGH   0x1F5
#define	IDE_DEVICE   0x1F6
#define	IDE_COMMAND   0x1F7
#define	IDE_STATUS   0x1F7
#define	ideinit   __ideinit
#define	irsec   __irsec
#define	iwrt   __iwrt
#define	idesize   __idesize

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

Macro Definition Documentation

IDE_COMMAND

#define IDE_COMMAND   0x1F7

Definition at line 14 of file ide.h.

Referenced by __idesize(), __irsec(), and __iwrt().

IDE_DATA

#define IDE_DATA   0x1F0

Definition at line 6 of file ide.h.

Referenced by __idesize(), __irsec(), and __iwrt().

IDE_DEVICE

#define IDE_DEVICE   0x1F6

Definition at line 13 of file ide.h.

Referenced by __ideinit(), __idesize(), __irsec(), and __iwrt().

IDE_ERROR

#define IDE_ERROR   0x1F1

Definition at line 8 of file ide.h.

IDE_LBA_HIGH

#define IDE_LBA_HIGH   0x1F5

Definition at line 12 of file ide.h.

Referenced by __irsec(), and __iwrt().

IDE_LBA_LOW

#define IDE_LBA_LOW   0x1F3

Definition at line 10 of file ide.h.

Referenced by __irsec(), and __iwrt().

IDE_LBA_MID

#define IDE_LBA_MID   0x1F4

Definition at line 11 of file ide.h.

Referenced by __irsec(), and __iwrt().

IDE_PRIMARY_CONTROL

#define IDE_PRIMARY_CONTROL   0x3F6

Definition at line 7 of file ide.h.

Referenced by __ideinit().

IDE_SECTORS

#define IDE_SECTORS   0x1F2

Definition at line 9 of file ide.h.

Referenced by __irsec(), and __iwrt().

IDE_STATUS

#define IDE_STATUS   0x1F7

Definition at line 15 of file ide.h.

Referenced by __ideinit(), __idesize(), __irsec(), and __iwrt().

ideinit

#define ideinit   __ideinit

Definition at line 17 of file ide.h.

Referenced by ___init().

idesize

#define idesize   __idesize

Definition at line 20 of file ide.h.

Referenced by __disksize().

irsec

#define irsec   __irsec

Definition at line 18 of file ide.h.

Referenced by ___init(), __ffsinit(), __fsinit(), __fsread(), __fsreadb(), and cmd_readfile().

iwrt

#define iwrt   __iwrt

Definition at line 19 of file ide.h.

Referenced by ___init(), __ffsinit(), __fsadd(), __fsdelete(), __fswrite(), __fswriteb(), and cmd_writefile().

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.