/* * This file contains some defines for the AT-hd-controller. * Various sources. Check out some definitions (see comments with * a ques). */#ifndef _HDREG_H#define _HDREG_H/* Hd controller regs. Ref: IBM AT Bios-listing */#define HD_DATA		0x1f0	/* _CTL when writing */#define HD_ERROR	0x1f1	/* see err-bits */#define HD_NSECTOR	0x1f2	/* nr of sectors to read/write */#define HD_SECTOR	0x1f3	/* starting sector */#define HD_LCYL		0x1f4	/* starting cylinder */#define HD_HCYL		0x1f5	/* high byte of starting cyl */#define HD_CURRENT	0x1f6	/* 101dhhhh , d=drive, hhhh=head */#define HD_STATUS	0x1f7	/* see status-bits */#define HD_PRECOMP HD_ERROR	/* same io address, read=error, write=precomp */#define HD_COMMAND HD_STATUS	/* same io address, read=status, write=cmd */#define HD_CMD		0x3f6/* Bits of HD_STATUS */#define ERR_STAT	0x01#define INDEX_STAT	0x02#define ECC_STAT	0x04	/* Corrected error */#define DRQ_STAT	0x08#define SEEK_STAT	0x10#define WRERR_STAT	0x20#define READY_STAT	0x40#define BUSY_STAT	0x80/* Values for HD_COMMAND */#define WIN_RESTORE		0x10#define WIN_READ		0x20#define WIN_WRITE		0x30#define WIN_VERIFY		0x40#define WIN_FORMAT		0x50#define WIN_INIT		0x60#define WIN_SEEK 		0x70#define WIN_DIAGNOSE		0x90#define WIN_SPECIFY		0x91/* Bits for HD_ERROR */#define MARK_ERR	0x01	/* Bad address mark ? */#define TRK0_ERR	0x02	/* couldn't find track 0 */#define ABRT_ERR	0x04	/* ? */#define ID_ERR		0x10	/* ? */#define ECC_ERR		0x40	/* ? */#define	BBD_ERR		0x80	/* ? */struct partition {	unsigned char boot_ind;		/* 0x80 - active (unused) */	unsigned char head;		/* ? */	unsigned char sector;		/* ? */	unsigned char cyl;		/* ? */	unsigned char sys_ind;		/* ? */	unsigned char end_head;		/* ? */	unsigned char end_sector;	/* ? */	unsigned char end_cyl;		/* ? */	unsigned int start_sect;	/* starting sector counting from 0 */	unsigned int nr_sects;		/* nr of sectors in partition */};#endif