static int __wind_task_setmode(struct task_struct *curr, struct pt_regs *regs)
{
int setmask, clrmask, mode_r;
clrmask = __xn_reg_arg1(regs);
setmask = __xn_reg_arg2(regs);
/* Primary required: current thread must be valid. */
mode_r = xnpod_set_thread_mode(xnpod_current_thread(),
clrmask, setmask);
if (__xn_reg_arg3(regs))
__xn_copy_to_user(curr, (void __user *)__xn_reg_arg3(regs),
&mode_r, sizeof(mode_r));
return 0;
}
u_long t_mode(u_long mask, u_long newmask, u_long *oldmode)
{
psostask_t *task;
if (!xnpod_primary_p())
return -EPERM;
task = psos_current_task();
/* We have no error case here: just clear out any unwanted bit. */
mask &= T_MODE_MASK;
newmask &= T_MODE_MASK;
*oldmode = xeno_mode_to_psos(xnthread_state_flags(&task->threadbase) & XNTHREAD_MODE_BITS);
*oldmode |= ((task->threadbase.imask & 0x7) << 8);
if (mask & T_TSLICE) {
if (newmask & T_TSLICE)
xnpod_set_thread_tslice(&task->threadbase,
psos_time_slice);
else
xnpod_set_thread_tslice(&task->threadbase,
XN_INFINITE);
mask &= ~T_TSLICE;
}
if (mask == 0)
return SUCCESS;
xnpod_set_thread_mode(&task->threadbase,
psos_mode_to_xeno(mask),
psos_mode_to_xeno(newmask));
/* Reschedule in case the scheduler has been unlocked. */
xnpod_schedule();
return SUCCESS;
}
