ST0_KERNEL_CUMASK
li t1, ST0_KERNEL_CUMASK | STATMASK
li t1, ST0_KERNEL_CUMASK | STATMASK
li t1, ST0_KERNEL_CUMASK | (STATMASK & ~1)
p->thread.cp0_status = (read_c0_status() & ~(ST0_CU2|ST0_CU1)) | ST0_KERNEL_CUMASK;
unsigned int status_set = ST0_KERNEL_CUMASK;