syslib.c

来自「ATMEL920T的BSP及ETH等已经设备驱动程序」· C语言 代码 · 共 1,384 行 · 第 1/3 页

}
/*******************************************************************************
*
* sysHwInit - initialize the CPU board hardware
*
* This routine initializes various features of the hardware.
* Normally, it is called from usrInit() in usrConfig.c.
*
* NOTE: This routine should not be called directly by the user.
*
* RETURNS: N/A
*/

void sysHwInit (void)
{
    /* install the IRQ/SVC interrupt stack splitting routine */
    SIO_CHAN * pSioChan;

    _func_armIntStackSplit = sysIntStackSplit;

#if defined(INCLUDE_PCI)

    /* Initialise the V3 PCI bridge controller */

    /*    sysV3Init();*/ /* huxianpeng20051231*/

    /*  Initialise PCI driver library. */

    /*
        if (pciIomapLibInit (PCI_MECHANISM_3, CPU_PCI_CNFG_ADRS,
        			 CPU_PCI_CNFG_ADRS, 0) != OK)
    	sysToMonitor (BOOT_NO_AUTOBOOT);
    */  /* huxianpeng20051231*/
#endif  /* INCLUDE_PCI */

#ifdef INCLUDE_SERIAL
    /* initialise the serial devices */

    sysSerialHwInit ();      /* initialise serial data structure */
    pSioChan = sysSerialChanGet ( 0 );
    sioIoctl ( pSioChan, SIO_MODE_SET, ( void* ) SIO_MODE_POLL );
    /*    sioPollOutput ( pSioChan, '*');*/
#endif /* INCLUDE_SERIAL */

    /* SC16C554 hardware init */
    uartHwInit();

}

/*******************************************************************************
*
* sysHwInit2 - additional system configuration and initialization
*
* This routine connects system interrupts and does any additional
* configuration necessary.  Note that this is called from
* sysClkConnect() in the timer driver.
*
* RETURNS: N/A
*
*/

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

    if (initialised)
        return;

    /* initialise the interrupt library and interrupt driver */

    intLibInit (AMBA_INT_NUM_LEVELS, AMBA_INT_NUM_LEVELS, INT_MODE);
    /*ambaIntDevInit();*/
    at91IntDevInit();

    /* connect sys clock interrupt and auxiliary clock interrupt */
    /*	(void) intConnect (INUM_TO_IVEC(INT_VEC_UART_0), sysIRQInt, 0);*/
    (void) intConnect (INUM_TO_IVEC(INT_VEC_SYSIRQ), sysIRQInt, 0);

    /*	intEnable (INT_LVL_UART_0);*/

    /*
        (void)intConnect (INUM_TO_IVEC (SYS_TIMER_INT_VEC), sysClkInt, 0);
        (void)intConnect (INUM_TO_IVEC (AUX_TIMER_INT_VEC), sysAuxClkInt, 0);
    */

    /* huxianpeng 20060107*/
#ifdef INCLUDE_SERIAL
    /* connect serial interrupt */

    /*sysSerialHwInit2();*/	/* huxianpeng 20060107*/

#endif /* INCLUDE_SERIAL */

    uartHwInit2();


#if defined (INCLUDE_PCI)
#if defined (INCLUDE_DEC21X40END) || defined (INCLUDE_FEI82557END)

    /* map all appropriate Ethernet PCI device memory and I/O addresses */

    sysLanPciInit ();

#endif  /* INCLUDE_DEC21X40END/FEI82557END */

#if defined (INCLUDE_USB)
    /* Low level init for usb */

    sysUsbPciInit();

#endif
#endif  /* INCLUDE_PCI */

#ifdef INCLUDE_AT91RM9200END

    sysLanEmacInit ();
#endif /* INCLUDE_AT91RM9200END*/

    initialised = TRUE;

}

/*******************************************************************************
*
* sysPhysMemTop - get the address of the top of physical memory
*
* This routine returns the address of the first missing byte of memory,
* 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)
    {
#ifdef LOCAL_MEM_AUTOSIZE

        /* If auto-sizing is possible, this would be the spot.  */

#	error   "Dynamic memory sizing not supported"

#else
        /* Don't do autosizing, if size is given */

        physTop = (char *)(LOCAL_MEM_LOCAL_ADRS + LOCAL_MEM_SIZE);

#endif /* LOCAL_MEM_AUTOSIZE */

    }

    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.  It is usually called
* only by reboot() -- which services ^X -- and bus errors at interrupt
* level.  However, in some circumstances, the user may wish to introduce a
* new <startType> to enable special boot ROM facilities.
*
* RETURNS: Does not return.
*/

STATUS sysToMonitor
(
    int startType	/* passed to ROM to tell it how to boot */
)
{
    FUNCPTR	pRom;
    UINT32 *	p = (UINT32 *)ROM_TEXT_ADRS;

#ifdef INCLUDE_SERIAL

    sysSerialReset ();	/* put serial devices into quiet state */
#endif

    /*
     * Examine ROM - if it's a VxWorks boot ROM, jump to the warm boot entry
     * point; otherwise jump to the start of the ROM.
     * A VxWorks boot ROM begins
     *    MOV	R0,#BOOT_COLD
     *    B	...
     *    DCB	"Copyright"
     * We check the first and third words only. This could be tightened up
     * if required (see romInit.s).
     */

    if (p[0] == 0xE3A00002 && p[2] == 0x79706F43)
        pRom = (FUNCPTR)(ROM_TEXT_ADRS + 4);	/* warm boot address */
    else
        pRom = (FUNCPTR)ROM_TEXT_ADRS;		/* start of ROM */

#if defined(CPU_720T)  || defined(CPU_720T_T) || \
    defined(CPU_740T)  || defined(CPU_740T_T) || \
    defined(CPU_920T)  || defined(CPU_920T_T) || \
    defined(CPU_940T)  || defined(CPU_940T_T) || \
    defined(CPU_946ES) || defined(CPU_946ES_T)

    VM_ENABLE(FALSE);	/* disable the MMU, cache(s) and write-buffer */
#endif

#if defined(CPU_920T) || defined(CPU_920T_T)
    /*
     * On 920T, can have the I-cache enabled once the MMU has been
     * disabled, so, unlike the other processors, disabling the MMU does
     * not disable the I-cache.  This would not be a problem, as the
     * 920T boot ROM initialisation code disables and flushes both caches.
     * However, in case we are, in fact, using a 7TDMI boot ROM,
     * disable and flush the I-cache here, or else the boot process may
     * fail.
     */

    cacheDisable (INSTRUCTION_CACHE);
#endif /* defined(CPU_920T/920T_T) */

    (*pRom)(startType);	/* jump to boot ROM */

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

/****************************************************************************
*
* 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 0;
}

/****************************************************************************
*
* sysProcNumSet - set the processor number
*
* Set the processor number for the CPU board.  Processor numbers should be
* unique on a single backplane.
*
* NOTE
* By convention, only processor 0 should dual-port its memory.
*
* RETURNS: N/A
*
* SEE ALSO: sysProcNumGet()
*/

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

/******************************************************************************
*
* sysLedsReadWrite - read/write the state of the LEDs on the board
*
* This routine can be used to read and write the state of the four LEDs
* on the board. The current state is ANDed and EORed with the supplied
* parameters. Bits 0..3 control LEDs 0..3. A 1 switches the LED on; a 0 off.
*
* RETURNS: previous state of LEDs.
*/

int sysLedsReadWrite
(
    int and,
    int eor
)
{
    UINT32	 	current, previous;
    int			oldLevel;

    oldLevel = intLock();

    /* read current value from hardware and mask off undefined bits */

    current = *((volatile UINT32 *)LED_LIGHTS) & LED_LEDS_MASK;

    previous = current;
    current = (current & and) ^ eor;

    /* wait for display status to be idle */

    while (*((volatile UINT32 *)LED_ALPHA) & LED_STATUS)
        ;

    /* set new value */

    *((volatile UINT32 *)LED_LIGHTS) = current;

    intUnlock (oldLevel);
    return previous;
}

#ifdef INCLUDE_FLASH
/******************************************************************************
*
* sysFlashWriteEnable - enable write access to the Flash memory
*
* This routine is used by flashMem.c to enable write access to the
* Flash memory.
*
* RETURNS: N/A
*/

void sysFlashWriteEnable (void)
{
    volatile UINT32 * ebiCsr = (volatile UINT32 *)INTEGRATOR_EBI_CSR1;

    /* allow write access to EBI_CSR1 area (Flash ) */

    *ebiCsr |= INTEGRATOR_EBI_WRITE_ENABLE;

    if (!(*ebiCsr & INTEGRATOR_EBI_WRITE_ENABLE))
    {
        *(volatile UINT32 *)INTEGRATOR_EBI_LOCK = 0xA05F;
        *ebiCsr |= INTEGRATOR_EBI_WRITE_ENABLE;
        *(volatile UINT32 *)INTEGRATOR_EBI_LOCK = 0;
    }

    /* Enable Vpp and allow write access to Flash in system controller */

    *(volatile UINT32 *)INTEGRATOR_SC_CTRLS = FL_SC_CONTROL;
}

/******************************************************************************
*
* sysFlashWriteDisable - disable write access to the Flash memory
*
* This routine is used by flashMem.c to disable write access to the
* Flash memory.
*
* RETURNS: N/A
*/

void sysFlashWriteDisable (void)
{
    volatile UINT32 * ebiCsr = (volatile UINT32 *)INTEGRATOR_EBI_CSR1;

    /* disable write access to EBI_CSR1 area (Flash ) */

    *ebiCsr &= ~INTEGRATOR_EBI_WRITE_ENABLE;

    if (*ebiCsr & INTEGRATOR_EBI_WRITE_ENABLE)
    {
        *(volatile UINT32 *)INTEGRATOR_EBI_LOCK = 0xA05F;
        *ebiCsr &= ~INTEGRATOR_EBI_WRITE_ENABLE;
        *(volatile UINT32 *)INTEGRATOR_EBI_LOCK = 0;
    }

    /* Disable Vpp and disable write access to Flash in system controller */

    *(volatile UINT32 *)INTEGRATOR_SC_CTRLS = 0;
}

STATUS sysFlashLock (void)
{

    return(OK);

}

#endif /* INCLUDE_FLASH */

/******************************************************************************
*
* sysIRQInt - process the SYS inturrupt in interrupt source 1 
*
* This routine  handles the system clock interrupt and the DBGU interrupt. It is 
*  attached to the clock interrupt vector by the routine sysClkConnect().
*
* RETURNS: N/A
*/

void sysIRQInt(void)
{
    UINT32 Reg;
    UINT32 Mask;


    /* acknowledge interrupt:  read  the  AIC_IVR Register to clear interrupt auotomatically*/
    AMBA_TIMER_READ ((AT91_AIC_IVR), Reg);

    /*  System Timer interrupt handle*/
    AMBA_TIMER_READ(AT91_ST_SR,Reg);
    AMBA_TIMER_READ(AT91_ST_IMR,Mask);
    if((Reg&Mask) & ST_bSet_PITS)
    {

        sysClkInt();
    }

    /*  DBGU interrupt handle*/
    AMBA_TIMER_READ(AT91C_BASE_DBGU+DBGU_SR,Reg);
    AMBA_TIMER_READ(AT91C_BASE_DBGU+DBGU_IMR,Mask);
    if((Reg&Mask)!=0)
    {

        primeCellSioInt(&ambaChan[0]);	/*only channel 0 used*/

    }




    /* interrupt complete:  write any to the  AIC_EOICR Register to indicate the end of the interrupt handle*/
    AMBA_TIMER_WRITE (AT91_AIC_EOICR, 0);
}