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Annotation of linux/kernel/blk_drv/scsi/sd.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *     sd.h Copyright (C) 1992 Drew Eckhardt 
        !             3:  *     SCSI disk driver header file by
        !             4:  *             Drew Eckhardt 
        !             5:  *
        !             6:  *     <[email protected]>
        !             7:  */
        !             8: #ifndef _SD_H
        !             9:        #define _SD_H
        !            10: /*
        !            11:        $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/sd.h,v 1.1 1992/04/24 18:01:50 root Exp root $
        !            12: */
        !            13: 
        !            14: #ifndef _SCSI_H
        !            15: #include "scsi.h"
        !            16: #endif
        !            17: 
        !            18: #define MAX_SD 2
        !            19: 
        !            20: typedef struct partition {
        !            21:        unsigned char boot_ind;         /* 0x80 - active (unused) */
        !            22:        unsigned char head;             /* ? */
        !            23:        unsigned char sector;           /* ? */
        !            24:        unsigned char cyl;              /* ? */
        !            25:        unsigned char sys_ind;          /* ? */
        !            26:        unsigned char end_head;         /* ? */
        !            27:        unsigned char end_sector;       /* ? */
        !            28:        unsigned char end_cyl;          /* ? */
        !            29:        unsigned int start_sect;        /* starting sector counting from 0 */
        !            30:        unsigned int nr_sects;          /* nr of sectors in partition */
        !            31: } Partition;
        !            32: 
        !            33: extern int NR_SD;
        !            34: 
        !            35: extern Partition scsi_disks[MAX_SD << 4] ;
        !            36: 
        !            37: 
        !            38: typedef struct {
        !            39:                unsigned capacity;              /* size in blocks */
        !            40:                unsigned sector_size;           /* size in bytes */
        !            41:                Scsi_Device  *device;           
        !            42:                unsigned char sector_bit_size;  /* sector_size = 2 to the  bit size power */
        !            43:                unsigned char sector_bit_shift; /* power of 2 sectors per FS block */
        !            44:                unsigned ten:1;                 /* support ten byte read / write */
        !            45:                unsigned remap:1;               /* support remapping */
        !            46:                unsigned use:1;                 /* after the initial inquiry, is 
        !            47:                                                   the device still supported ? */
        !            48:                } Scsi_Disk;
        !            49:        
        !            50: extern Scsi_Disk rscsi_disks[MAX_SD];
        !            51: 
        !            52: void sd_init(void);
        !            53: 
        !            54: #define HOST (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->host_no)
        !            55: #define ID (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->id)
        !            56: #define LUN (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->lun)
        !            57: #endif

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