int arch_cpu_init(void)

/arch/arm/cpu/armv7/s5p-common/cpu_info.c

#ifdef CONFIG_ARCH_CPU_INIT
int arch_cpu_init(void)
{
    s5p_set_cpu_id();
 
    return 0;
}
#endif

 

/arch/arm/mach-exynos/include/math/cpu.h  맞나?

 

static inline void s5p_set_cpu_id(void)
{
    unsigned int pro_id = readl(EXYNOS4_PRO_ID);
    unsigned int cpu_id = (pro_id & 0x00FFF000) >> 12;
    unsigned int cpu_rev = pro_id & 0x000000FF;
 
    switch (cpu_id) {
    case 0x200:
        /* Exynos4210 EVT0 */
        s5p_cpu_id = 0x4210;
        s5p_cpu_rev = 0;
        break;
    case 0x210:
        /* Exynos4210 EVT1 */
        s5p_cpu_id = 0x4210;
        s5p_cpu_rev = cpu_rev;
        break;
    case 0x412:
        /* Exynos4412 */
        s5p_cpu_id = 0x4412;
        s5p_cpu_rev = cpu_rev;
        break;
    case 0x520:
        /* Exynos5250 */
        s5p_cpu_id = 0x5250;
        break;
    case 0x420:
        /* Exynos5420 */
        s5p_cpu_id = 0x5420;
        break;
    case 0x422:
        /*
         * Exynos5800 is a variant of Exynos5420
         * and has product id 0x5422
         */
        s5p_cpu_id = 0x5422;
        break;
    }
}