void system_clock_init(void){	int count = 1000;	(*(volatile unsigned int *)S3C6410_OTHERS_ADDR)	|= (1 << 6);	//sys clock select in cmu	while(count--);	//nop	(*(volatile unsigned int *)S3C6410_OTHERS_ADDR)	|= ((1 << 7) | (1 << 6));	//syncmodereq to arm,0:asynchronous mode 1:synchronous mode	while((((*(volatile unsigned int *)S3C6410_OTHERS_ADDR) & 0xF00) != 0xF00));	//synchronous acknowledge	writel(0xffff, S3C6410_APLL_LOCK);	//control pll locking period for apll	writel(0xffff, S3C6410_MPLL_LOCK);	//control pll locking period for mpll	writel(0xffff, S3C6410_EPLL_LOCK);	//control pll locking period for epll	(*(volatile unsigned int *)S3C6410_CLOCK_DIV2) &= 0xFFF0FFFF;		(*(volatile unsigned int *)S3C6410_CLOCK_DIV2) |= (0x3 << 16);	//uart clock divider ratio,clkuart=clkuart_in/(uart_ratio+1)	//0:3 div_arm clock divider ratio	//4 div_mpll clock divider ratio	//8 hclk clock divider ratio	//9:11 hclkx2 clock divider ratio	//12:15 pclk clock divider ratio,which must be odd value. in other words,s3c6410 supports only even divider ratio	(*(volatile unsigned int *)S3C6410_CLOCK_DIV0) &= 0xFFFC0000;		(*(volatile unsigned int *)S3C6410_CLOCK_DIV0) |= ((0x3 << 12) | (1 << 9) | (1 << 8) | (1 << 4) | 0);		//0:2 sdiv,pll s divide value 	//8:13 pdiv,pll p divide value 	//16:25 pdiv,pll m divide value 	//31: pll enable control,0:disable 1:enable	//f_out=mdiv*f_in(12MHZ)/(pdiv * (1 << sdiv))	writel(((1 << 31) | (266 << 16) | (3 << 8) | (1 << 0)), S3C6410_APLL_CON);	writel(((1 << 31) | (266 << 16) | (3 << 8) | (1 << 0)), S3C6410_MPLL_CON);	//0:2 sdiv, pll s divide value 0x3	//8:13 pdiv, pll p divide value 0x2	//16:23 mdiv, pll m divide value 0x20	//31: pll enable control,0:disable 1:enable	writel(0x80200203, S3C6410_EPLL_CON0);	//0:15 kdiv,pll k divide value	//f_out=(mdiv+kdiv/2^16)*f_in/(pdiv*2^sdiv)	24MHZ	writel(0, S3C6410_EPLL_CON1);	//0 control mux_apll,0:fin_apll 1:fout_apll	//1 control mux_mpll,0:fin_mpll 1:fout_mpll	//2 control mux_epll,0:fin_epll 1:fout_epll	//13 control uart0,which is the source clock of uart,0:mout_epll 1:dout_mpll   	(*(volatile unsigned int *)(S3C6410_CLOCK_SRC)) |= (0x2007);		count = 0x10000;	while(count--);	//nop	//(*(volatile unsigned int *)S3C6410_OTHERS_ADDR)	&= 0xFFFFFFDF;	}