USER_SR
mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid);
__asm __volatile("mtsr %0,%1; isync" :: "n"(USER_SR), "r"(vsid));
mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid);
__asm __volatile("mtsr %0,%1; isync" :: "n"(USER_SR), "r"(slbv));
#define USER_ADDR ((uintptr_t)USER_SR << ADDR_SR_SHFT)
ASSYM(USER_SR, USER_SR);