3.5.1.130. get_cr

static inline unsigned long get_cr(void)
{
    unsigned long val;
    asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
    return val;
}

get_cr 用于获得arm的SCTLR(System Control Register)系统控制器

3.5.1.131. __get_cpu_architecture