p755-systffs.c

MPC8241:本程序是freescale的824*系列的BSP源程序

    )
    {
    return (flOK);
    }


/*******************************************************************************
*
* rfaVppOff - turns off Vpp (12 Volts)
*
* This routine turns off Vpp (12 Volts).
*
* RETURNS: N/A
*/

LOCAL void  rfaVppOff 
    (
    FLSocket vol		/* pointer identifying drive */
    ) 
    {
    }

#endif	/* SOCKET_12_VOLTS */


/*******************************************************************************
*
* rfaSocketInit - perform all necessary initializations of the socket
*
* This routine performs all necessary initializations of the socket.
*
* RETURNS: flOK always
*/

LOCAL FLStatus  rfaSocketInit 
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    vol.cardChanged = FALSE;

    /* enable memory window and map it at address 0 */
    rfaSetWindow (&vol);

    return (flOK);
    }

/*******************************************************************************
*
* rfaSetWindow - set current window attributes, Base address, size, etc
*
* This routine sets current window hardware attributes: Base address, size,
* speed and bus width.  The requested settings are given in the 'vol.window' 
* structure.  If it is not possible to set the window size requested in
* 'vol.window.size', the window size should be set to a larger value, 
* if possible. In any case, 'vol.window.size' should contain the 
* actual window size (in 4 KB units) on exit.
*
* RETURNS: N/A
*/

LOCAL void  rfaSetWindow 
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    /* Physical base as a 4K page */
    vol.window.baseAddress = FLASH_BASE_ADDR >> 12;

    flSetWindowSize (&vol, FLASH_SIZE >> 12);
    }

/*******************************************************************************
*
* rfaSetMappingContext - sets the window mapping register to a card address
*
* This routine sets the window mapping register to a card address.
* The window should be set to the value of 'vol.window.currentPage',
* which is the card address divided by 4 KB. An address over 128MB,
* (page over 32K) specifies an attribute-space address.
*
* The page to map is guaranteed to be on a full window-size boundary.
*
* RETURNS: N/A
*/

LOCAL void rfaSetMappingContext 
    (
    FLSocket vol,		/* pointer identifying drive */
    unsigned page		/* page to be mapped */
    )
    {
    }

/*******************************************************************************
*
* rfaGetAndClearCardChangeIndicator - return the hardware card-change indicator
*
* This routine returns the hardware card-change indicator and clears it if set.
*
* RETURNS: FALSE, or TRUE if the card has been changed
*/

LOCAL FLBoolean rfaGetAndClearCardChangeIndicator 
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (FALSE);
    }

/*******************************************************************************
*
* rfaWriteProtected - return the write-protect state of the media
*
* This routine returns the write-protect state of the media
*
* RETURNS: FALSE, or TRUE if the card is write-protected
*/

LOCAL FLBoolean rfaWriteProtected 
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (FALSE);
    }

/*******************************************************************************
*
* flFitInSocketWindow - check whether the flash array fits in the socket window
*
* This routine checks whether the flash array fits in the socket window.
*
* RETURNS: A chip size guaranteed to fit in the socket window.
*/

long int flFitInSocketWindow 
    (
    long int chipSize,		/* size of single physical chip in bytes */
    int      interleaving,	/* flash chip interleaving (1,2,4 etc) */
    long int windowSize		/* socket window size in bytes */
    )
    {
    if (chipSize*interleaving > windowSize) /* doesn't fit in socket window */
        {
        int  roundedSizeBits;

        /* fit chip in the socket window */
        chipSize = windowSize / interleaving;

        /* round chip size at powers of 2 */
        for (roundedSizeBits = 0;
            (0x1L << roundedSizeBits) <= chipSize;
            roundedSizeBits++)  ;

        chipSize = (0x1L << (roundedSizeBits - 1));
        }

    return  (chipSize);
    }

#if	FALSE
/*******************************************************************************
*
* sysTffsCpy - copy memory from one location to another
*
* This routine copies <size> characters from the object pointed
* to by <source> into the object pointed to by <destination>. If copying
* takes place between objects that overlap, the behavior is undefined.
*
* INCLUDE FILES: string.h
*
* RETURNS: A pointer to <destination>.
* 
* NOMANUAL
*/

void * sysTffsCpy
    (
    void *       destination,   /* destination of copy */
    const void * source,        /* source of copy */
    size_t       size           /* size of memory to copy */
    )
    {
    bcopy ((char *) source, (char *) destination, (size_t) size);
    return (destination);
    }

/*******************************************************************************
*
* sysTffsSet - set a block of memory
*
* This routine stores <c> converted to an `unsigned char' in each of the
* elements of the array of `unsigned char' beginning at <m>, with size <size>.
*
* INCLUDE FILES: string.h
*
* RETURNS: A pointer to <m>.
* 
* NOMANUAL
*/

void * sysTffsSet
    (
    void * m,                   /* block of memory */
    int    c,                   /* character to store */
    size_t size                 /* size of memory */
    )
    {
    bfill ((char *) m, (int) size, c);
    return (m);
    }
#endif	/* FALSE */

/*******************************************************************************
*
* flDelayLoop - consume the specified time
*
* This routine consumes the specified time.
*
* RETURNS: N/A
*/

void flDelayLoop 
    (
    int cycles			/* loop count to be consumed */
    )
    {
    }

/*******************************************************************************
*
* sysTffsFormat - format the flash memory above an offset
*
* This routine formats the flash memory.  Because this function defines
* the symbolic constant, HALF_FORMAT, the lower half of the specified flash
* memory is left unformatted.  If the lower half of the flash memory was
* previously formated by TrueFFS, and you are trying to format the upper half,
* you need to erase the lower half of the flash memory before you format the
* upper half.  To do this, you could use:
* .CS
* tffsRawio(0, 3, 0, 8)
* .CE
* The first argument in the tffsRawio() command shown above is the TrueFFS
* drive number, 0.  The second argument, 3, is the function number (also
* known as TFFS_PHYSICAL_ERASE).  The third argument, 0, specifies the unit
* number of the first erase unit you want to erase.  The fourth argument, 8,
* specifies how many erase units you want to erase.
*
* RETURNS: OK, or ERROR if it fails.
*/

STATUS sysTffsFormat (void)
    {
    STATUS status;
    tffsDevFormatParams params = 
	{
#define	HALF_FORMAT	/* lower 0.5MB for bootimage, upper 0.5MB for TFFS */
#ifdef	HALF_FORMAT
	{0x80000l, 99, 1, 0x10000l, NULL, {0,0,0,0}, NULL, 2, 0, NULL},
#else
	{0x000000l, 99, 1, 0x10000l, NULL, {0,0,0,0}, NULL, 2, 0, NULL},
#endif	/* HALF_FORMAT */
	FTL_FORMAT_IF_NEEDED
	};

    status = tffsDevFormat (0, (int)&params);
    return (status);
    }