/* Secondary CPUs starts using C here. Here we need to setup CPU
* specific stuff such as the local timer and the MMU. */
void __init smp_callin(void)
{
extern void cpu_idle(void);
int cpu = cpu_now_booting;
reg_intr_vect_rw_mask vect_mask = {0};
/* Initialise the idle task for this CPU */
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
/* Set up MMU */
cris_mmu_init();
__flush_tlb_all();
/* Setup local timer. */
cris_timer_init();
/* Enable IRQ and idle */
REG_WR(intr_vect, irq_regs[cpu], rw_mask, vect_mask);
unmask_irq(IPI_INTR_VECT);
unmask_irq(TIMER0_INTR_VECT);
preempt_disable();
local_irq_enable();
cpu_set(cpu, cpu_online_map);
cpu_idle();
}
void __init
time_init(void)
{
reg_intr_vect_rw_mask intr_mask;
/* probe for the RTC and read it if it exists
* Before the RTC can be probed the loops_per_usec variable needs
* to be initialized to make usleep work. A better value for
* loops_per_usec is calculated by the kernel later once the
* clock has started.
*/
loops_per_usec = 50;
if(RTC_INIT() < 0) {
/* no RTC, start at 1980 */
xtime.tv_sec = 0;
xtime.tv_nsec = 0;
have_rtc = 0;
} else {
/* get the current time */
have_rtc = 1;
update_xtime_from_cmos();
}
/*
* Initialize wall_to_monotonic such that adding it to xtime will yield zero, the
* tv_nsec field must be normalized (i.e., 0 <= nsec < NSEC_PER_SEC).
*/
set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
/* Start CPU local timer */
cris_timer_init();
/* enable the timer irq in global config */
intr_mask = REG_RD(intr_vect, regi_irq, rw_mask);
intr_mask.timer = 1;
REG_WR(intr_vect, regi_irq, rw_mask, intr_mask);
/* now actually register the timer irq handler that calls timer_interrupt() */
setup_irq(TIMER_INTR_VECT, &irq_timer);
/* enable watchdog if we should use one */
#if defined(CONFIG_ETRAX_WATCHDOG)
printk("Enabling watchdog...\n");
start_watchdog();
/* If we use the hardware watchdog, we want to trap it as an NMI
and dump registers before it resets us. For this to happen, we
must set the "m" NMI enable flag (which once set, is unset only
when an NMI is taken).
The same goes for the external NMI, but that doesn't have any
driver or infrastructure support yet. */
{
unsigned long flags;
local_save_flags(flags);
flags |= (1<<30); /* NMI M flag is at bit 30 */
local_irq_restore(flags);
}
#endif
}
