crt0.c

The combined demo is dedicated for S1C33L05, so DMT33L05 should be used to load and run the demo. F

        (unsigned long)dummy,           //              96 reserved
        (unsigned long)dummy,           //              97 reserved
        (unsigned long)dummy,           //              98 reserved
        (unsigned long)dummy,           //              99 reserved
        (unsigned long)dummy,           //              100 reserved
        (unsigned long)dummy,           //              101 reserved
        (unsigned long)dummy,           //              102 reserved
        (unsigned long)dummy,           //              103 reserved
        (unsigned long)dummy,           //              104 reserved
        (unsigned long)dummy,           //              105 reserved
        (unsigned long)dummy,           //              106 reserved
        (unsigned long)dummy,           //              107 reserved
        (unsigned long)dummy,           //              108 reserved
        (unsigned long)dummy,           //              109 reserved
        (unsigned long)dummy,           //              110 reserved
        (unsigned long)dummy,           //              111 reserved
        (unsigned long)dummy,           //              112 SIO with FIFO RxD Error
        (unsigned long)dummy,           //              113 SIO with FIFO RxD Buffer Full
        (unsigned long)dummy,           //              114 SIO with FIFO TxD Buffer Empty
};


//---------------------------------------------------------------------------------
//      Function name       :   boot
//  Function description    :   booting system
//       
//      Parameters
//         Input        :   none        
//         Output       :   none
//         I/O          :   none
//      
//      Return value        :   void
//
//  Global variable     :   none
//---------------------------------------------------------------------------------
void boot(void)
{
    asm("xld.w      %r15,0x4000");      // Set SP in end of 8KB internal RAM
    asm("ld.w       %sp,%r15");
    asm("ld.w       %r15,0b10000");     // Set PSR to interrupt enable
    asm("ld.w       %psr,%r15");
    asm("xld.w      %r15,__dp");        // Set DPR is 0x0
    
    codecpy(&__START_cache7,& __START_cache7_lma,&__END_cache7);
    
    _init_bcu();                        // Initialize BCU on boot time
    _init_sysclk(SYS_OSC3);
    _init_subclk(SUB_OSC_dt1);
    _init_sdramc();                     //16M x 16bit
    _init_busarb(7);                    //From 1 to 15

//    sysBssClear();                  //Bss clear
    sysDataCopy();              //data copy 

    _init_sys();
    _init_lib();
    main();
    _exit();                            // Go to exit in sys.c to use simulated I/O
}

//---------------------------------------------------------------------------------
//      Function name       :   dummy
//  Function description    :   dummy routine in interrupt vection table
//       
//      Parameters
//         Input        :   none        
//         Output       :   none
//         I/O          :   none
//      
//      Return value        :   void
//
//  Global variable     :   none
//---------------------------------------------------------------------------------
void dummy(void)
{
INT_LOOP:
    goto    INT_LOOP;
}
  
//---------------------------------------------------------------------------------
//      Function name       :   int_addr_err
//  Function description    :   address error interrupt program.
//       
//      Parameters
//         Input        :   none        
//         Output       :   none
//         I/O          :   none
//      
//      Return value        :   void
//
//  Global variable     :   none
//---------------------------------------------------------------------------------
void int_addr_err(void)
{
ADDR_ERR:
    goto ADDR_ERR;
}   

//---------------------------------------------------------------------------------
//      Function name       :   codecpy
//  Function description    :   copy memory from src to des
//       
//      Parameters
//         Input        :   none        
//         Output       :   none
//         I/O          :   none
//      
//      Return value        :   void
//
//  Global variable     :   none
//---------------------------------------------------------------------------------
void  codecpy(int *dst, int *src, int *size)
{
    asm("HCOPY_LOOP:        ");
    asm("ld.uh  %r10, [%r7]+    ");
    asm("ld.h   [%r6]+, %r10    ");
    asm("sub    %r8, 2      ");
    asm("jrgt   HCOPY_LOOP  ");
}

/****************************************************************************
    sysDataCopy()
 ----------------------------------------------------------------------------
    description:
        DATA 

    argument:   (none)
    return:     (none)
    input:      (none)
    output:     (none)
    flag:       (none)
    global:     (none)
    comment:    (none)

 ****************************************************************************/
void sysDataCopy()
{
    asm("InitDataSectionStart:");

    asm("xld.w  %r6, __START_data_lma");
    asm("xld.w  %r7, __END_data");
    asm("xld.w  %r8, __START_data");

    asm("cmp    %r8, %r7");
    asm("jrlt   InitDataSectionLoop");
    asm("jp     InitDataSectionEnd");

    asm("InitDataSectionLoop:");
    asm("ld.w   %r10, [%r6]+");
    asm("ld.w   [%r8]+, %r10");
    asm("cmp    %r8, %r7");
    asm("jrlt   InitDataSectionLoop");
    asm("InitDataSectionEnd:");
}

/**** End of function *******************************************************/