Symbol: __read_const_32bit_c0_register
arch/mips/include/asm/mipsregs.h
1663
(unsigned long) __read_const_32bit_c0_register(reg, sel) : \
arch/mips/include/asm/mipsregs.h
1908
#define read_c0_prid() __read_const_32bit_c0_register($15, 0)