hd.h

一个操作系统,用C语言实现开发的,我在一个浙江大学的操作系统实验网站找到.大家学习以下

// Kernel
// Default Driver IDE

#ifndef __HD_H
#define __HD_H

#include <devices.h>

// HD Ports
#define IDE_PRIMARY			0x01f0
#define IDE_SECONDARY		0x0170				
#define HDP_PRI_BASE		0x01f0
#define HDP_SEC_BASE		0x0170
#define HDPA_DATA			0x0000
#define HDPA_ERR			0x0001
#define HDPA_WPC4			0x0001
#define HDPA_SECCNT			0x0002
#define HDPA_SECNUM			0x0003
#define HDPA_CYLLO			0x0004
#define HDPA_CYLHI			0x0005
#define HDPA_HEAD			0x0006
#define HDPA_STATUS			0x0007
#define HDPA_CMD			0x0007
#define HDP_PRI(a)			(HDP_PRI_BASE+(a))
#define HDP_SEC(a)			(HDP_SEC_BASE+(a))
#define HDP_CTL_PRI			0x03f6
#define HDP_CTL_SEC			0x0376

typedef struct _DRIVE
{
	int port_base;
	int drive_id;
	_u32 n_cylinders;
	_u32 n_heads;
	_u32 n_sectors;
	_u32 n_LBAsectors;
	_u32 capbilities;
	_u32 n_multimax;
	_u32 n_dwtrans;
	char serial_number[24];	
	char model_number[44];
} DRIVE;
#define DRIVE_VALID(drv)	((drv).port_base==IDE_PRIMARY || (drv).port_base==IDE_SECONDARY)

// HD capbilities
#define HDC_LBA		0x0200
#define HDC_DMA		0x0100

// HD hardware error bits
#define HDE_DAM		0x0001	// DAM not found (always 0 for CP-3022)
#define HDE_TRACK0	0x0002	// couldn't find track 0
#define HDE_ABORT	0x0004	// command aborted prematurely
#define HDE_ID		0x0010	// ID found
#define HDE_ECC		0x0040	// uncorrectable ECC error
#define	HDE_BAD		0x0080	// bad block detected
// HD software defined errors
#define HDE_INVALID	0x0100	// invalidate drive
#define HDE_ADDRESS	0x0200	// incorrect address specified
#define HDE_READY	0x0400	// controller not ready
#define HDE_TIMEOUT	0x0800	// operation time out
#define HDE_NOTDONE	0x1000	// job not complete

// Device parameters
typedef struct _HDDEVICE
{
	int drive;
	int partition;
	int type;
	char magic[16];
	_u32 base, length;		// base / length in sector
} HDDEVICE;

#ifdef __cplusplus
extern "C"
#endif
long __syscall drvDefaultIDE(_u32, _u32, _u32);

#endif