PSW_MASK_USER
tmp &= PSW_MASK_USER | PSW_MASK_RI;
unsigned long mask = PSW_MASK_USER;
(regs->psw.mask & (PSW_MASK_USER | PSW_MASK_RI));
regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
(user_sregs.regs.psw.mask & (PSW_MASK_USER | PSW_MASK_RI));