/* usrIde.c - IDE initialization *//* Copyright 1992-1996 Wind River Systems, Inc. *//*modification history--------------------01f,18jul96,hdn  changed doc: DESCRIPTION01e,18jun96,hdn  fixed a bug in "offset" calculation.01d,24jan95,jdi  doc cleanup.01c,12oct94,hdn  used ideRawio() instead of using raw file system.01b,25oct93,hdn  tuned for IDE driver.01a,07oct93,sst  part of this program was written by S.Stern*//*DESCRIPTIONThis file is used to configure and initialize the VxWorks IDE support.This file is included by bootConfig.c and usrConfig.c.SEE ALSO: usrExtra.cNOMANUAL*/#ifndef  __INCusrIde#define  __INCusrIde/* defines */#define VXDOS				"VXDOS"#define VXEXT				"VXEXT" /* forward declaration */LOCAL int usrIdePartition (int drive, DOS_PART_TBL *pPart);/********************************************************************************* usrIdeConfig - mount a DOS file system from an IDE hard disk** This routine mounts a DOS file system from an IDE hard disk.** The <drive> parameter is the drive number of the hard disk;* 0 is `C:' and 1 is `D:'.** The <fileName> parameter is the mount point, e.g., `/ide0/'.** NOTE: Because VxWorks does not support partitioning, hard disks formatted* and initialized on VxWorks are not compatible with DOS machines.  This* routine does not refuse to mount a hard disk that was initialized on* VxWorks.  The hard disk is assumed to have only one partition with a* partition record in sector 0.** RETURNS: OK or ERROR.** SEE ALSO:* .pG "I/O System, Local File Systems, Intel i386/i486 Appendix"*/STATUS usrIdeConfig    (    int     drive,	/* drive number of hard disk (0 or 1) */    char *  fileName	/* mount point */    )    {    BLK_DEV *pBlkDev;    char bootDir [BOOT_FILE_LEN];    char buffer [1024];    int offset = 0;    IDE_RAW ideRaw;    char *pSys;    DOS_PART_TBL *pPart;    if ((UINT)drive >= IDE_MAX_DRIVES)	{	printErr ("drive is out of range (0-%d).\n", IDE_MAX_DRIVES - 1);	return (ERROR);	}    /* split off boot device from boot file */    devSplit (fileName, bootDir);    /* read the boot sector */    ideRaw.cylinder	= 0;    ideRaw.head		= 0;    ideRaw.sector	= 1;    ideRaw.pBuf		= buffer;    ideRaw.nSecs	= 1;    ideRaw.direction	= 0;    ideRawio (drive, &ideRaw);    /* get an offset if it is formated by MSDOS */    pSys  = &buffer[DOS_BOOT_SYS_ID];    pPart = (DOS_PART_TBL *)&buffer[DOS_BOOT_PART_TBL];    if ((strncmp(pSys, VXDOS, strlen(VXDOS)) != 0) &&        (strncmp(pSys, VXEXT, strlen(VXEXT)) != 0))        {        offset = usrIdePartition (drive, pPart);        }    if ((pBlkDev = ideDevCreate(drive, 0, offset)) == (BLK_DEV *)NULL)        {        printErr ("Error during ideDevCreate: %x\n", errno);        return (ERROR);        }    /* Make DOS file system */    if (dosFsDevInit(bootDir, pBlkDev, NULL) == (DOS_VOL_DESC *)NULL)        {	printErr ("Error during dosFsDevInit: %x\n", errno);        return (ERROR);        }    return (OK);    }/********************************************************************************* usrIdePartition - get an offset to the first partition of the drive.** This routine gets an offset to the first partition of the drive.** RETURNS: offset to the partition**/LOCAL int usrIdePartition    (    int     drive,	/* drive number of hard disk (0 or 1) */    DOS_PART_TBL *pPart	/* pointer to the partition table */    )    {    DOS_PART_TBL *pTemp	= pPart;    int offset		= 0;    int ix;    char buffer[1024];    IDE_RAW ideRaw;    for (ix = 0; ix < 4; ix++)		/* active primary DOS partition */	{	if (pPart->dospt_status == 0x80)	    if ((pPart->dospt_type == 0x01) ||	        (pPart->dospt_type == 0x04) ||	        (pPart->dospt_type == 0x06))		{	        offset = pPart->dospt_absSec;		return (offset);		}	pPart++;	}	    pPart = pTemp;    for (ix = 0; ix < 4; ix++)		/* primary DOS partition */	{	if ((pPart->dospt_type == 0x01) ||	    (pPart->dospt_type == 0x04) ||	    (pPart->dospt_type == 0x06))	    {	    offset = pPart->dospt_absSec;	    return (offset);	    }	pPart++;	}    pPart = pTemp;    for (ix = 0; ix < 4; ix++)		/* extended DOS partition */	{	if (pPart->dospt_type == 0x05)	    {	    ideRaw.cylinder	= (pPart->dospt_startSec & 0xf0) >> 4;	    ideRaw.head		= pPart->dospt_startHead;	    ideRaw.sector	= pPart->dospt_startSec & 0x0f;	    ideRaw.pBuf		= buffer;	    ideRaw.nSecs	= 1;	    ideRaw.direction	= 0;	    ideRawio (drive, &ideRaw);	    pPart = (DOS_PART_TBL *)&buffer[DOS_BOOT_PART_TBL];	    offset = usrIdePartition (drive, pPart);	    return (offset);	    }	pPart++;	}    return (offset);    }#endif /* __INCusrIde */