usrtffs.c

（1）本人基于MPC860的vxworks bsp的程序 （2）实现了FEC 100M和 SCC 10M的网口功能 （3）实现了nor flash的TFFS文件系统 （4）实现了系统的自检 （

/* usrTffs.c - TFFS initialization */

/* Copyright 1992-1997 Wind River Systems, Inc. */

/*
modification history
--------------------
01e,02feb99,yp   added function usrTffsLnConfig() to support DOS_OPT_LONGNAMES
01d,01apr98,hdn  moved tffsLoad() back to bootConfig.c.
01c,31dec97,yp   doc cleanup
01b,01dec97,hdn  added tffsLoad() to minimize change to bootConfig.c.
01a,07nov97,hdn  written.
*/

/*
DESCRIPTION
This file is included by bootConfig.c and usrConfig.c. The file contains
routines for configuring a TFFS Flash disk to be used as file system as
with dosFs. The routines are used by the boot process to find and load
vxWorks images. 

SEE ALSO: usrExtra.c

NOMANUAL
*/

#ifndef  __INCusrTffs
#define  __INCusrTffs

/* includes */

#include "tffs/tffsDrv.h"
#include "tffs/flsocket.h"


/* forward declarations */


/*******************************************************************************
*
* usrTffsConfig - mount the DOS file system on a TFFS Flash disk
*
* This routine mounts the vxWorks DOS file system on a TFFS Flash drive.
*
* The <drive> parameter is the drive number of the TFFS Flash drive;
* valid values are 0 through the number of socket interfaces in BSP.
*
* The <fileName> parameter is the mount point, e.g., `/tffs0/'.
*
* RETURNS: OK or ERROR.
*
* SEE ALSO:
* .pG "I/O System, Local File Systems"
*/

STATUS usrTffsConfig
    (
    int     drive,	/* drive number of TFFS */
    int     removable,	/* 0 - nonremovable flash media */
    char *  fileName	/* mount point */
    )
    {
    BLK_DEV * pBootDev;
    char bootDir [BOOT_FILE_LEN];

    if ((UINT)drive >= noOfDrives)
	{
	printErr ("drive is out of range (0-%d).\n", noOfDrives - 1);
	return (ERROR);
	}

    /* create a block device spanning entire disk (non-distructive!) */

    if ((pBootDev = tffsDevCreate (drive, removable)) == NULL)
	{
        printErr ("tffsDevCreate failed.\n");
        return (ERROR);
	}
	
    /* split off boot device from boot file */

    devSplit (fileName, bootDir);

    /* initialize the boot block device as a dosFs device named <bootDir> */

    if (dosFsDevInit (bootDir, pBootDev, NULL) == NULL)
	{
        printErr ("dosFsDevInit failed.\n");
        return (ERROR);
	}

    return (OK);
    }

/*******************************************************************************
*
* usrTffsLnConfig - mount the DOS file system long names support
*
* This routine mounts the vxWorks DOS file system disabling TrueFFS FAT
* monitoring and supporting the vxWorks DOS_OPT_LONGNAMES on a TFFS Flash
* drive. Disabling FAT monitoring results in considerable ferformance loss
* but is required to support the "vxWorks long file names". This is an 
* alternative to usrTffsConfig.
*
* The <drive> parameter is the drive number of the TFFS Flash drive;
* valid values are 0 through the number of socket interfaces in BSP.
*
* The <fileName> parameter is the mount point, e.g., `/tffs0/'.
*
* RETURNS: OK or ERROR.
*
* SEE ALSO:
* .pG "I/O System, Local File Systems"
*/

STATUS usrTffsLnConfig
    (
    int     drive,	/* drive number of TFFS */
    int     removable,	/* 0 - nonremovable flash media */
    char *  fileName	/* mount point */
    )
    {
    BLK_DEV * pBootDev;
    char bootDir [BOOT_FILE_LEN];

    if ((UINT)drive >= noOfDrives)
	{
	printErr ("drive is out of range (0-%d).\n", noOfDrives - 1);
	return (ERROR);
	}

    /* create a block device spanning entire disk (non-distructive!) */

    if ((pBootDev = tffsDevCreate (drive, removable)) == NULL)
	{
        printErr ("tffsDevCreate failed.\n");
        return (ERROR);
	}
	
    /* disable FAT monitoring so vxWorks long file names can work */

    if (tffsDevOptionsSet ((TFFS_DEV *) pBootDev) != OK)
	{
	printErr ("unable to disable FAT monitoring \n");
	return (ERROR);
	}

    /* split off boot device from boot file */

    devSplit (fileName, bootDir);

    /* Set up long file name support in DOS*/

    if (dosFsMkfsOptionsSet (DOS_OPT_LONGNAMES) != OK)
	{
	printErr ("failed to set DOS_OPT_LONGNAMES\n");
	return (ERROR);
	}    

    /* initialize the device as a dosFs device named <bootDir> */

    if (dosFsMkfs (bootDir, pBootDev) == NULL)
	{
        printErr ("dosFsMkfs failed.\n");
        return (ERROR);
	}

    return (OK);
    }
#endif /* __INCusrTffs */