100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
|
|
* 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
|
|
|
|
/* currently supports only 1 hd, put type here */
|
|
#define HARD_DISK_TYPE 17
|
|
|
|
/*
|
|
* Ok, hard-disk-type is currently hardcoded. Not beatiful,
|
|
* but easier. We don't use BIOS for anything else, why should
|
|
* we get HD-type from it? Get these values from Reference Guide.
|
|
*/
|
|
|
|
#if HARD_DISK_TYPE == 17
|
|
#define _CYL 977
|
|
#define _HEAD 5
|
|
#define __WPCOM 300
|
|
#define _LZONE 977
|
|
#define _SECT 17
|
|
#define _CTL 0
|
|
#elif HARD_DISK_TYPE == 18
|
|
#define _CYL 977
|
|
#define _HEAD 7
|
|
#define __WPCOM (-1)
|
|
#define _LZONE 977
|
|
#define _SECT 17
|
|
#define _CTL 0
|
|
#else
|
|
#error Define HARD_DISK_TYPE and parameters, add your own entries as well
|
|
#endif
|
|
|
|
/* Controller wants just wp-com/4 */
|
|
#if __WPCOM >= 0
|
|
#define _WPCOM ((__WPCOM)>>2)
|
|
#else
|
|
#define _WPCOM __WPCOM
|
|
#endif
|
|
|
|
/* 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
|