a query regarding x-loader muxing for omap3evm

  I have a query regarding x-loader muxing.It is said that x-loader does the pin muxing . So i looked in board folder in x loader and there are many board files.
        My specific board contains one function s_init which do this,

    /**********************************************************
    * Routine: s_init
    * Description: Does early system init of muxing and clocks.
    * - Called at time when only stack is available.
    **********************************************************/
    
    void s_init(void)
    {
    watchdog_init();
    #ifdef CONFIG_3430_AS_3410
    /* setup the scalability control register for
    * 3430 to work in 3410 mode
    */
    __raw_writel(0x5ABF,CONTROL_SCALABLE_OMAP_OCP);
    #endif
    try_unlock_memory();
    set_muxconf_regs();
    delay(100);
    prcm_init();
    per_clocks_enable();
    config_3430sdram_ddr();
    }

   I want to know who call this function as no one in x-loader / board / omap3evm / omap3evm.c is calling this function.