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sun4u: split NPT and INT_DIS accesses between timer and compare registers

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Accesses to the timer register high bit should only set NPT, whilst accesses
to the timer compare register high bit should only set INT_DIS. This fixes
issues with the timer being unexpectedly disabled whilst trying to boot
FreeBSD SPARC64.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-By: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2015-11-08 12:45:35 +00:00
parent e913cac71b
commit bf43330aa4
1 changed files with 10 additions and 9 deletions
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19
hw/sparc64/sun4u.c
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@ -500,17 +500,17 @@ static uint64_t timer_to_cpu_ticks(int64_t timer_ticks, uint32_t frequency)
void cpu_tick_set_count(CPUTimer *timer, uint64_t count)
{
uint64_t real_count = count & ~timer->disabled_mask;
uint64_t disabled_bit = count & timer->disabled_mask;
uint64_t real_count = count & ~timer->npt_mask;
uint64_t npt_bit = count & timer->npt_mask;
int64_t vm_clock_offset = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
cpu_to_timer_ticks(real_count, timer->frequency);
TIMER_DPRINTF("%s set_count count=0x%016lx (%s) p=%p\n",
TIMER_DPRINTF("%s set_count count=0x%016lx (npt %s) p=%p\n",
timer->name, real_count,
timer->disabled?"disabled":"enabled", timer);
timer->npt ? "disabled" : "enabled", timer);
timer->disabled = disabled_bit ? 1 : 0;
timer->npt = npt_bit ? 1 : 0;
timer->clock_offset = vm_clock_offset;
}
@ -520,12 +520,13 @@ uint64_t cpu_tick_get_count(CPUTimer *timer)
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - timer->clock_offset,
timer->frequency);
TIMER_DPRINTF("%s get_count count=0x%016lx (%s) p=%p\n",
TIMER_DPRINTF("%s get_count count=0x%016lx (npt %s) p=%p\n",
timer->name, real_count,
timer->disabled?"disabled":"enabled", timer);
timer->npt ? "disabled" : "enabled", timer);
if (timer->disabled)
real_count |= timer->disabled_mask;
if (timer->npt) {
real_count |= timer->npt_mask;
}
return real_count;
}