syslib.c

来自「wrSbc8255的vxWorks BSP驱动源码」· C语言 代码 · 共 873 行 · 第 1/2 页

* which indicates the top of memory.
*
* Normally, the user specifies the amount of physical memory with the
* macro LOCAL_MEM_SIZE in config.h.  BSPs that support run-time
* memory sizing do so only if the macro LOCAL_MEM_AUTOSIZE is defined.
* If not defined, then LOCAL_MEM_SIZE is assumed to be, and must be, the
* true size of physical memory.
*
* NOTE: Do no adjust LOCAL_MEM_SIZE to reserve memory for application
* use.  See sysMemTop() for more information on reserving memory.
*
* RETURNS: The address of the top of physical memory.
*
* SEE ALSO: sysMemTop()
*/

char * sysPhysMemTop
    ( 
    void 
    )
    {
    static char * physTop = NULL;

    if (physTop == NULL)
        {
        physTop = (char *)(LOCAL_MEM_LOCAL_ADRS + LOCAL_MEM_SIZE);
        }

    return (physTop);
    }

/***********************************************************************
*
* sysMemTop - get the address of the top of VxWorks memory
*
* This routine returns a pointer to the first byte of memory not
* controlled or used by VxWorks.
*
* The user can reserve memory space by defining the macro USER_RESERVED_MEM
* in config.h.  This routine returns the address of the reserved memory
* area.  The value of USER_RESERVED_MEM is in bytes.
*
* RETURNS: The address of the top of VxWorks memory.
*/

char * sysMemTop
    ( 
    void 
    )
    {
    static char * memTop = NULL;

    if (memTop == NULL)
        {
        memTop = sysPhysMemTop () - USER_RESERVED_MEM ;
        }

    return memTop ;
    }

/***********************************************************************
*
* sysToMonitor - transfer control to the ROM monitor
*
* This routine transfers control to the ROM monitor.  Normally, it is called
* only by reboot()--which services ^X--and by bus errors at interrupt level.
* However, in some circumstances, the user may wish to introduce a
* <startType> to enable special boot ROM facilities.
*
* RETURNS: Does not return.
*/

STATUS sysToMonitor
    (
    int startType    /* parameter passed to ROM to tell it how to boot   */
    )
    {
    FUNCPTR pRom = (FUNCPTR) (ROM_TEXT_ADRS + 4);       /* Warm reboot      */

#ifdef INCLUDE_MOTFCCEND
    /*                                                                      */
    /* Get the physical location of the IMMR register                       */
    /*                                                                      */
    int immrVal = vxImmrGet ();
#endif /* INCLUDE_MOTFCCEND */

    intLock ();

    cacheDisable (INSTRUCTION_CACHE);
    cacheDisable (DATA_CACHE);

#ifdef INCLUDE_AUX_CLK
    sysAuxClkDisable ();
#endif /* INCLUDE_AUX_CLK */

#ifdef INCLUDE_MOTSCCEND
    sysSccEnetDisable (0);     /* disable the ethernet device              */
    sysSccEnetIntDisable (0);  /* disable the ethernet device interrupt    */
#endif /* INCLUDE_MOTSCCEND */

#ifdef INCLUDE_MOTFCCEND
    /* disable the FCC */
    sysFccEnetDisable (immrVal, 2);
#endif /* INCLUDE_MOTFCCEND */

    sysSerialReset ();           /* reset the serial device                  */

    vxMsrSet (0);

    (*pRom) (startType);        /* jump to bootrom entry point              */

    return( OK );               /* in case we continue from ROM monitor     */
    }


/***********************************************************************
*
* sysHwInit2 - initialize additional system hardware
*
* This routine connects system interrupt vectors and configures any 
* required features not configured by sysHwInit().
*
* RETURNS: N/A
*/

void sysHwInit2 
    (
    void
    )
    {
    static BOOL configured = FALSE ; 

    if (!configured)
        {
#ifdef INCLUDE_AUXCLK
        /*
         * initialize and start auxiliary clock support
         */
        sysAuxClkEnable ();
#endif /* INCLUDE_AUXCLK */

        /*
         * initialize serial interrupts
         */
        sysSerialHwInit2 ();

        /*
         * Indicate we have been through this procedure for reentrancy.
         */
        configured = TRUE ;
        }
    }

/***********************************************************************
*
* sysProcNumGet - get the processor number
*
* This routine returns the processor number for the CPU board, which is
* set with sysProcNumSet().
*
* RETURNS: The processor number for the CPU board.
*
* SEE ALSO: sysProcNumSet()
*/

int sysProcNumGet
    ( 
    void 
    )
    {
    return (sysProcNum);
    }

/***********************************************************************
*
* sysProcNumSet - set the processor number
*
* This routine sets the processor number for the CPU board.  Processor numbers
* should be unique on a single backplane.  It also maps local resources onto
* the VMEbus.
*
* RETURNS: N/A
*
* SEE ALSO: sysProcNumGet()
*
*/

void sysProcNumSet
    (
        int     procNum         /* processor number */
    )
    {
    sysProcNum = procNum;
    }

/***********************************************************************
*
* vxImmrSet - Set the IMMR to a specific value
*
* This routine sets the IMMR to a specific value
*
* RETURNS: N/A
*/

void vxImmrSet 
    (
    UINT32 value
    )
    {
    immrAddress = value;
    return;
    }

/***********************************************************************
*
* vxImmrGet - return the current IMMR value
*
* This routine returns the current IMMR value
*
* RETURNS: current IMMR value
*
*/

UINT32  vxImmrGet 
    (
    void
    )
    {
    return (immrAddress);
    }

/***********************************************************************
*
* sysBaudClkFreq - returns the frequency of the BRG clock
*
* This routine returns the frequency of the BRG clock
*
* NOTE: From page 9-5 in Rev0 of 8260 book
*
*       baud clock = 2*cpm_freq/2^2*(DFBRG+1) where DFBRG = 01
*                  = 2*cpm_freq/16
*
* RETURNS: Frequence in HZ
*
*/

int sysBaudClkFreq
    (
    void
    )
    {
    UINT32 cpmFreq = sysCpmFreqGet ();

    if (cpmFreq == ERROR)
        return ERROR;
    else
        return cpmFreq*2/16; 
    }

/***********************************************************************
*
* sysClkRateAdjust - calculates proper decrementer frequency for a cpu 
*                    frequency
*
* This routine calculates proper decrementer frequency for a cpu frequency
*
* RETURNS: Speed in Hz
*
*/

void sysClkRateAdjust 
    (
     int *sysDecClkFrequency
    )
    {
    *sysDecClkFrequency = sysInputFreqGet() / DEC_ADJUSTMENT;

    return;
    }

/***********************************************************************
*
* sysInputFreqGet - determines the Input Oscillator clock frequency
*
* This routine determines the Input Oscillator clock frequency
*
* NOTE: From page 9-2 in Rev0 of 8260 book
*
* RETURNS: Input frequency in HZ
*
*/

UINT32 sysInputFreqGet 
    (
    void
    )
    {
    return INPUT_FREQUENCY;
    }

/***********************************************************************
*
* sysCpmFreqGet - determines the CPM operating frequency
*
* This routine determines the CPM operating frequency
*
* NOTE: From page 9-2 in Rev0 of 8260 book
*
* RETURNS: CPM frequency in HZ
*
*/

UINT32 sysCpmFreqGet
    (
    void
    )
    {
    return CPM_FREQUENCY;
    }

/***********************************************************************
*
* sysCoreFreqGet - determines the Core operating frequency
*
* This routine determines the Core operating frequency
*
* NOTE: From page 9-2 in Rev0 of 8260 book
*
* RETURNS: Core frequency in HZ
*
*/

UINT32 sysCoreFreqGet 
    (
    void
    )
    {
    return CORE_FREQUENCY;
    }

/***********************************************************************
*
* sysChipRev - determines revision of Chip installed
*
* This routine determines revision of Chip installed
*
* RETURNS: Chip revision
*
*/

UINT32 sysChipRev
    (
    void
    )
    {
    UINT32  immrRegAddr = vxImmrGet ();
    UINT32  immrValue;

    immrRegAddr += 0x101A8;
    immrValue = *(UINT32 *)immrRegAddr;
    immrValue &= MASKNUM_MASK;

    return (immrValue);    
    }

/***********************************************************************
*
* sysCpmReset - issues a CPM reset command
*
* This routine issues a CPM reset command
*
* RETURNS: N/A
*
*/
   
void sysCpmReset
    (
      void
    )
    {
    /* Get the location of the IMMR register.                               */
    int immrVal = vxImmrGet ();

    /* Wait for any previous commands to finish                             */
    while ( *M8260_CPCR( immrVal ) & M8260_CPCR_FLG )
	{}

    *M8260_CPCR( immrVal ) =  M8260_CPCR_RESET | M8260_CPCR_FLG;

    /* See if the command has been accepted.                                */
    while ( *M8260_CPCR( immrVal ) & M8260_CPCR_FLG )
        {}

    return;
    }

/***********************************************************************
*
* sysUserSwitchGet - returns the value of the User Dip Switch
*
* This routine returns the value of the User Dip Switch
*
* NOTE: Reverse bits so S1 is MSB S8 is LSB
*
* RETURNS: Unsigned 8 bit value
*
*/
   
UINT8  sysUserSwitchGet
    (
    void
    )
    {
    UINT8   swValue;
    UINT8   modChar;

    swValue = BSCR_USER_SWITCH;
    modChar = 0;

    /* skip obvious equalities */
    if ( swValue == 0x00 || swValue == 0xFF )
        return swValue;

    if (swValue & 0x80) modChar += 0x01;
    if (swValue & 0x40) modChar += 0x02;
    if (swValue & 0x20) modChar += 0x04;
    if (swValue & 0x10) modChar += 0x08;
    if (swValue & 0x08) modChar += 0x10;
    if (swValue & 0x04) modChar += 0x20;
    if (swValue & 0x02) modChar += 0x40;
    if (swValue & 0x01) modChar += 0x80;

    return modChar;
    }