syslib.c

ROM型的vxworksBSP包 编译测试通过

}

#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)
/*******************************************************************************
*
* sysHwInit0 - perform early BSP-specific initialisation
*
* This routine performs such BSP-specific initialisation as is necessary before
* the architecture-independent cacheLibInit can be called. It is called
* from usrInit() before cacheLibInit(), before sysHwInit() and before BSS
* has been cleared.
*
* RETURNS: N/A
*/

void sysHwInit0 (void)
{


    cacheArm920tLibInstall (NULL, NULL);

    /* Install the appropriate MMU library and translation routines */

    mmuArm920tLibInstall (NULL, NULL);

	
    return;
}
#endif /* defined(720T/740T/920T/940T/946ES) */


/*******************************************************************************
*
* 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 */
    s3cExcVecSet();
    
    _func_armIntStackSplit = sysIntStackSplit;

    /* initialise the serial devices */

    sysSerialHwInit ();      /* initialise serial data structure */
}

void s3cExcVecSet(void)
{
    int i;
    i = (int)&excEnterUndef;
    *((volatile int*)(S3C_EXC_BASE + 0x0)) = i;

    i = (int)&excEnterSwi;
    *((volatile int*)(S3C_EXC_BASE + 0x4)) = i;

    i = (int)&excEnterPrefetchAbort;
    *((volatile int*)(S3C_EXC_BASE + 0x8)) = i;

    i = (int)&excEnterDataAbort;
    *((volatile int*)(S3C_EXC_BASE + 0xc)) = i;

    i = (int)&intEnt;
    *((volatile int*)(S3C_EXC_BASE + 0x14)) = i;
}

/*******************************************************************************
*
* 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);
    s3c2410IntDevInit();

    /* connect sys clock interrupt and auxiliary clock interrupt */

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

    /* connect serial interrupt */
    sysSerialHwInit2();

    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)
    {
	/* Don't do autosizing, if size is given */
	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.  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+0x20);

/*#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 + 0x24);	/* warm boot address */
    else
	pRom = (FUNCPTR)(ROM_TEXT_ADRS + 0x20);		/* 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	 	previous=0;


    
    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)
     {
    
     }

/******************************************************************************
*
* 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)
     {
     
     }
#endif /* INCLUDE_FLASH */