static uint64_t timerblock_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
timerblock *tb = (timerblock *)opaque;
int64_t val;
addr &= 0x1f;
switch (addr) {
case 0: /* Load */
return tb->load;
case 4: /* Counter. */
if (((tb->control & 1) == 0) || (tb->count == 0)) {
return 0;
}
/* Slow and ugly, but hopefully won't happen too often. */
val = tb->tick - qemu_get_clock_ns(vm_clock);
val /= timerblock_scale(tb);
if (val < 0) {
val = 0;
}
return val;
case 8: /* Control. */
return tb->control;
case 12: /* Interrupt status. */
return tb->status;
default:
return 0;
}
}
static uint64_t timerblock_read(void *opaque, hwaddr addr,
unsigned size)
{
TimerBlock *tb = (TimerBlock *)opaque;
int64_t val;
switch (addr) {
case 0: /* Load */
return tb->load;
case 4: /* Counter. */
if (((tb->control & 1) == 0) || (tb->count == 0)) {
return 0;
}
/* Slow and ugly, but hopefully won't happen too often. */
val = tb->tick - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
val /= timerblock_scale(tb);
if (val < 0) {
val = 0;
}
return val;
case 8: /* Control. */
return tb->control;
case 12: /* Interrupt status. */
return tb->status;
default:
return 0;
}
}
static void timerblock_reload(TimerBlock *tb, int restart)
{
if (tb->count == 0) {
return;
}
if (restart) {
tb->tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
tb->tick += (int64_t)tb->count * timerblock_scale(tb);
timer_mod(tb->timer, tb->tick);
}
static void timerblock_reload(timerblock *tb, int restart)
{
if (tb->count == 0) {
return;
}
if (restart) {
tb->tick = qemu_get_clock_ns(vm_clock);
}
tb->tick += (int64_t)tb->count * timerblock_scale(tb);
qemu_mod_timer(tb->timer, tb->tick);
}
