// Create a device and proceed to the main loop.
void device_run(struct cen64_device *device) {
fpu_state_t saved_fpu_state;
// TODO: Preserve host registers pinned to the device.
saved_fpu_state = fpu_get_state();
vr4300_cp1_init(&device->vr4300);
rsp_late_init(&device->rsp);
// Spin the device until we return (from setjmp).
if (unlikely(device->debug_sfd > 0))
device_debug_spin(device);
else if (device->multithread)
device_multithread_spin(device);
else
device_spin(device);
// TODO: Restore host registers that were pinned.
fpu_set_state(saved_fpu_state);
}
/*
* Duplicate parent state in child
* for U**X fork.
*/
kern_return_t
machine_thread_dup(
thread_act_t parent,
thread_act_t child
)
{
struct i386_saved_state *parent_state, *child_state;
struct i386_machine_state *ims;
struct i386_float_state floatregs;
#ifdef XXX
/* Save the FPU state */
if ((pcb_t)(per_proc_info[cpu_number()].fpu_pcb) == parent->mact.pcb) {
fp_state_save(parent);
}
#endif
if (child->mact.pcb == NULL || parent->mact.pcb == NULL)
return (KERN_FAILURE);
/* Copy over the i386_saved_state registers */
child->mact.pcb->iss = parent->mact.pcb->iss;
/* Check to see if parent is using floating point
* and if so, copy the registers to the child
* FIXME - make sure this works.
*/
if (parent->mact.pcb->ims.ifps) {
if (fpu_get_state(parent, &floatregs) == KERN_SUCCESS)
fpu_set_state(child, &floatregs);
}
/* FIXME - should a user specified LDT, TSS and V86 info
* be duplicated as well?? - probably not.
*/
return (KERN_SUCCESS);
}
