systffs.c

这是micrel公司宽带路由ARM9芯片的VXWORKS BSP 源代码

* constantly in RFA environment.
*
* RETURNS: N/A
*/

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

#ifdef SOCKET_12_VOLTS

/*******************************************************************************
*
* rfaVppOn - turns on Vpp (12 Volts)
*
* This routine turns on Vpp (12 Volts). Vpp must be known to be good on exit.
* Assumed to be ON constantly in RFA environment. This is not optional and 
* must always be implemented. 
*
* RETURNS: flOK always.
*/

LOCAL FLStatus rfaVppOn
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (flOK);
    }

/*******************************************************************************
*
* rfaVppOff - turns off Vpp (12 Volts)
*
* This routine turns off Vpp (12 Volts). Assumed to be ON constantly 
* in RFA environment.This is not optional and must always be implemented.
*
* RETURNS: N/A
*/

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

#endif	/* SOCKET_12_VOLTS */

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

    /* TODO: 
     * This function is always board specific.
     * Please set this to your specific needs.
     */

LOCAL FLStatus rfaInitSocket
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    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
*/

    /* TODO: set this to your specific needs */

LOCAL void rfaSetWindow
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    /* Physical base as a 4K page */

    vol.window.baseAddress = FLASH_BASE_ADRS >> 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. On entry to this 
* routine vol.window.currentPage is the page already mapped into the window.
* (In otherwords the page that was mapped by the last call to this routine.)
* The page to map is guaranteed to be on a full window-size boundary.
* This is meaningful only in environments that use sliding window mechanism
* to view flash memory, like in PCMCIA. Not common in RFA environments. 
*
* 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 TRUE if the card has been changed and FALSE if not. It
* also clears the "card-changed" indicator if it has been set.
* Always return FALSE in RFA environments since device is not removable.
*
* 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);
    }

/*******************************************************************************
*
* flDelayMsecs - wait for specified number of milliseconds
*
* This routine waits for the specified number of milliseconds.
*
* RETURNS: N/A
*
* NOMANUAL
*/

void flDelayMsecs
    (
    unsigned milliseconds       /* milliseconds to wait */
    )
    {
    UINT32 ix;
    UINT32 iy = 1;
    UINT32 iz = 2;

    /* it doesn't count time consumed in interrupt level */

    for (ix = 0; ix < milliseconds; ix++)
        for (ix = 0; ix < sysTffsMsecLoopCount; ix++)
	    {
	    tickGet ();			/* dummy */
	    iy = KILL_TIME_FUNC;	/* consume time */
	    }
    }

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

void flDelayLoop 
    (
    int  cycles
    )
    {
    while (--cycles)
	;
    }

#if 1 /*FALSE*/
/*******************************************************************************
*
* 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 1.5MB for TFFS */
#ifdef	HALF_FORMAT
	{0x00100000l, 99, 1, 0x10000l, NULL, {0,0,0,0}, NULL, 2, 0, NULL},
#else
	{0x00000000l, 99, 1, 0x10000l, NULL, {0,0,0,0}, NULL, 2, 0, NULL},
#endif	/* HALF_FORMAT */
	FTL_FORMAT_IF_NEEDED
	};

    /* we assume that the drive number 0 is RFA */

    status = tffsDevFormat (0, (int)&params);
    return (status);
    }
#endif /* FALSE */