/*
* Routine: cpu_start
* Function:
*/
kern_return_t
cpu_start(
int cpu)
{
struct per_proc_info *proc_info;
kern_return_t ret;
mapping_t *mp;
proc_info = PerProcTable[cpu].ppe_vaddr;
if (cpu == cpu_number()) {
PE_cpu_machine_init(proc_info->cpu_id, !(proc_info->cpu_flags & BootDone));
ml_init_interrupt();
proc_info->cpu_flags |= BootDone|SignalReady;
return KERN_SUCCESS;
} else {
proc_info->cpu_flags &= BootDone;
proc_info->interrupts_enabled = 0;
proc_info->pending_ast = AST_NONE;
proc_info->istackptr = proc_info->intstack_top_ss;
proc_info->rtcPop = EndOfAllTime;
proc_info->FPU_owner = NULL;
proc_info->VMX_owner = NULL;
proc_info->pms.pmsStamp = 0; /* Dummy transition time */
proc_info->pms.pmsPop = EndOfAllTime; /* Set the pop way into the future */
proc_info->pms.pmsState = pmsParked; /* Park the stepper */
proc_info->pms.pmsCSetCmd = pmsCInit; /* Set dummy initial hardware state */
mp = (mapping_t *)(&proc_info->ppUMWmp);
mp->mpFlags = 0x01000000 | mpLinkage | mpPerm | 1;
mp->mpSpace = invalSpace;
if (proc_info->start_paddr == EXCEPTION_VECTOR(T_RESET)) {
simple_lock(&rht_lock);
while (rht_state & RHT_BUSY) {
rht_state |= RHT_WAIT;
thread_sleep_usimple_lock((event_t)&rht_state,
&rht_lock, THREAD_UNINT);
}
rht_state |= RHT_BUSY;
simple_unlock(&rht_lock);
ml_phys_write((vm_offset_t)&ResetHandler + 0,
RESET_HANDLER_START);
ml_phys_write((vm_offset_t)&ResetHandler + 4,
(vm_offset_t)_start_cpu);
ml_phys_write((vm_offset_t)&ResetHandler + 8,
(vm_offset_t)&PerProcTable[cpu]);
}
/*
* Note: we pass the current time to the other processor here. He will load it
* as early as possible so that there is a chance that it is close to accurate.
* After the machine is up a while, we will officially resync the clocks so
* that all processors are the same. This is just to get close.
*/
ml_get_timebase((unsigned long long *)&proc_info->ruptStamp);
__asm__ volatile("sync"); /* Commit to storage */
__asm__ volatile("isync"); /* Wait a second */
ret = PE_cpu_start(proc_info->cpu_id,
proc_info->start_paddr, (vm_offset_t)proc_info);
if (ret != KERN_SUCCESS) {
if (proc_info->start_paddr == EXCEPTION_VECTOR(T_RESET)) {
simple_lock(&rht_lock);
if (rht_state & RHT_WAIT)
thread_wakeup(&rht_state);
rht_state &= ~(RHT_BUSY|RHT_WAIT);
simple_unlock(&rht_lock);
};
} else {
simple_lock(&SignalReadyLock);
if (!((*(volatile short *)&proc_info->cpu_flags) & SignalReady)) {
(void)hw_atomic_or(&proc_info->ppXFlags, SignalReadyWait);
thread_sleep_simple_lock((event_t)&proc_info->cpu_flags,
&SignalReadyLock, THREAD_UNINT);
}
simple_unlock(&SignalReadyLock);
}
return(ret);
}
}
/*
* Routine: cpu_machine_init
* Function:
*/
void
cpu_machine_init(
void)
{
struct per_proc_info *proc_info;
volatile struct per_proc_info *mproc_info;
proc_info = getPerProc();
mproc_info = PerProcTable[master_cpu].ppe_vaddr;
if (proc_info != mproc_info) {
simple_lock(&rht_lock);
if (rht_state & RHT_WAIT)
thread_wakeup(&rht_state);
rht_state &= ~(RHT_BUSY|RHT_WAIT);
simple_unlock(&rht_lock);
}
PE_cpu_machine_init(proc_info->cpu_id, !(proc_info->cpu_flags & BootDone));
if (proc_info->hibernate) {
uint32_t tbu, tbl;
do {
tbu = mftbu();
tbl = mftb();
} while (mftbu() != tbu);
proc_info->hibernate = 0;
hibernate_machine_init();
// hibernate_machine_init() could take minutes and we don't want timeouts
// to fire as soon as scheduling starts. Reset timebase so it appears
// no time has elapsed, as it would for regular sleep.
mttb(0);
mttbu(tbu);
mttb(tbl);
}
if (proc_info != mproc_info) {
while (!((mproc_info->cpu_flags) & SignalReady))
continue;
cpu_sync_timebase();
}
ml_init_interrupt();
if (proc_info != mproc_info)
simple_lock(&SignalReadyLock);
proc_info->cpu_flags |= BootDone|SignalReady;
if (proc_info != mproc_info) {
if (proc_info->ppXFlags & SignalReadyWait) {
(void)hw_atomic_and(&proc_info->ppXFlags, ~SignalReadyWait);
thread_wakeup(&proc_info->cpu_flags);
}
simple_unlock(&SignalReadyLock);
pmsPark(); /* Timers should be cool now, park the power management stepper */
}
}
void
cpu_machine_init(
void)
{
cpu_data_t *cdp = current_cpu_datap();
PE_cpu_machine_init(cdp->cpu_id, !cdp->cpu_boot_complete);
cdp->cpu_boot_complete = TRUE;
cdp->cpu_running = TRUE;
ml_init_interrupt();
#if CONFIG_VMX
/* for every CPU, get the VT specs */
vmx_get_specs();
#endif
}
