static int set_rtc_mmss(unsigned long nowtime)
{
int retval;
/* gets recalled with irq locally disabled */
spin_lock(&rtc_lock);
if (efi_enabled)
retval = efi_set_rtc_mmss(nowtime);
else
retval = mach_set_rtc_mmss(nowtime);
spin_unlock(&rtc_lock);
return retval;
}
static int set_rtc_mmss(unsigned long nowtime)
{
int retval;
unsigned long flags;
/* gets recalled with irq locally disabled */
/* XXX - does irqsave resolve this? -johnstul */
spin_lock_irqsave(&rtc_lock, flags);
if (efi_enabled)
retval = efi_set_rtc_mmss(nowtime);
else
retval = mach_set_rtc_mmss(nowtime);
spin_unlock_irqrestore(&rtc_lock, flags);
return retval;
}
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick
*/
static inline void do_timer_interrupt(struct pt_regs *regs)
{
#ifdef CONFIG_X86_IO_APIC
if (timer_ack) {
unsigned long flags;
/*
* Subtle, when I/O APICs are used we have to ack timer IRQ
* manually to reset the IRR bit for do_slow_gettimeoffset().
* This will also deassert NMI lines for the watchdog if run
* on an 82489DX-based system.
*/
spin_lock_irqsave(&i8259A_lock, flags);
outb(0x0c, PIC_MASTER_OCW3);
/* Ack the IRQ; AEOI will end it automatically. */
inb(PIC_MASTER_POLL);
spin_unlock_irqrestore(&i8259A_lock, flags);
}
#endif
do_timer_interrupt_hook(regs);
/*
* If we have an externally synchronized Linux clock, then update
* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
* called as close as possible to 500 ms before the new second starts.
*/
if ((time_status & STA_UNSYNC) == 0 &&
xtime.tv_sec > last_rtc_update + 660 &&
(xtime.tv_nsec / 1000)
>= USEC_AFTER - ((unsigned) TICK_SIZE) / 2 &&
(xtime.tv_nsec / 1000)
<= USEC_BEFORE + ((unsigned) TICK_SIZE) / 2) {
/* horrible...FIXME */
if (efi_enabled) {
if (efi_set_rtc_mmss(xtime.tv_sec) == 0)
last_rtc_update = xtime.tv_sec;
else
last_rtc_update = xtime.tv_sec - 600;
} else if (set_rtc_mmss(xtime.tv_sec) == 0)
last_rtc_update = xtime.tv_sec;
else
/* do it again in 60 s */
last_rtc_update = xtime.tv_sec - 600;
}
}
