tstat_instr_t
tcpu->tcpu_instr = (tstat_instr_t *)tstat_va[0];
((sizeof (tstat_instr_t) + MMU_PAGESIZE - 1) & ~(MMU_PAGESIZE - 1))
#define TSTAT_INSTR_PAGES ((sizeof (tstat_instr_t) >> MMU_PAGESHIFT) + 1)
((uintptr_t)(tcpu)->tcpu_ibase + offsetof(tstat_instr_t, mem))
tstat_instr_t *tcpu_instr;