include/linux/hdreg.h

/* */
   1 /*
   2  * This file contains some defines for the AT-hd-controller.
   3  * Various sources. Check out some definitions (see comments with
   4  * a ques).
   5  */
   6 #ifndef _HDREG_H
   7 #define _HDREG_H
   8 
   9 /* Hd controller regs. Ref: IBM AT Bios-listing */
  10 #define HD_DATA         0x1f0   /* _CTL when writing */
  11 #define HD_ERROR        0x1f1   /* see err-bits */
  12 #define HD_NSECTOR      0x1f2   /* nr of sectors to read/write */
  13 #define HD_SECTOR       0x1f3   /* starting sector */
  14 #define HD_LCYL         0x1f4   /* starting cylinder */
  15 #define HD_HCYL         0x1f5   /* high byte of starting cyl */
  16 #define HD_CURRENT      0x1f6   /* 101dhhhh , d=drive, hhhh=head */
  17 #define HD_STATUS       0x1f7   /* see status-bits */
  18 #define HD_PRECOMP HD_ERROR     /* same io address, read=error, write=precomp */
  19 #define HD_COMMAND HD_STATUS    /* same io address, read=status, write=cmd */
  20 
  21 #define HD_CMD          0x3f6
  22 
  23 /* Bits of HD_STATUS */
  24 #define ERR_STAT        0x01
  25 #define INDEX_STAT      0x02
  26 #define ECC_STAT        0x04    /* Corrected error */
  27 #define DRQ_STAT        0x08
  28 #define SEEK_STAT       0x10
  29 #define WRERR_STAT      0x20
  30 #define READY_STAT      0x40
  31 #define BUSY_STAT       0x80
  32 
  33 /* Values for HD_COMMAND */
  34 #define WIN_RESTORE             0x10
  35 #define WIN_READ                0x20
  36 #define WIN_WRITE               0x30
  37 #define WIN_VERIFY              0x40
  38 #define WIN_FORMAT              0x50
  39 #define WIN_INIT                0x60
  40 #define WIN_SEEK                0x70
  41 #define WIN_DIAGNOSE            0x90
  42 #define WIN_SPECIFY             0x91
  43 
  44 /* Bits for HD_ERROR */
  45 #define MARK_ERR        0x01    /* Bad address mark ? */
  46 #define TRK0_ERR        0x02    /* couldn't find track 0 */
  47 #define ABRT_ERR        0x04    /* ? */
  48 #define ID_ERR          0x10    /* ? */
  49 #define ECC_ERR         0x40    /* ? */
  50 #define BBD_ERR         0x80    /* ? */
  51 
  52 struct partition {
  53         unsigned char boot_ind;         /* 0x80 - active (unused) */
  54         unsigned char head;             /* ? */
  55         unsigned char sector;           /* ? */
  56         unsigned char cyl;              /* ? */
  57         unsigned char sys_ind;          /* ? */
  58         unsigned char end_head;         /* ? */
  59         unsigned char end_sector;       /* ? */
  60         unsigned char end_cyl;          /* ? */
  61         unsigned int start_sect;        /* starting sector counting from 0 */
  62         unsigned int nr_sects;          /* nr of sectors in partition */
  63 };
  64 
  65 #endif
/* */
root/include/linux/hdreg.h

INCLUDED FROM
