diff options
Diffstat (limited to 'hw/misc')
| -rw-r--r-- | hw/misc/macio/cuda.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c index d4a52fbddb..729905236c 100644 --- a/hw/misc/macio/cuda.c +++ b/hw/misc/macio/cuda.c @@ -184,36 +184,37 @@ static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val) cuda_timer_update(s, ti, ti->load_time); } -static int64_t get_next_irq_time(CUDATimer *s, int64_t current_time) +static int64_t get_next_irq_time(CUDATimer *ti, int64_t current_time) { int64_t d, next_time; unsigned int counter; /* current counter value */ - d = muldiv64(current_time - s->load_time, + d = muldiv64(current_time - ti->load_time, CUDA_TIMER_FREQ, NANOSECONDS_PER_SECOND); /* the timer goes down from latch to -1 (period of latch + 2) */ - if (d <= (s->counter_value + 1)) { - counter = (s->counter_value - d) & 0xffff; + if (d <= (ti->counter_value + 1)) { + counter = (ti->counter_value - d) & 0xffff; } else { - counter = (d - (s->counter_value + 1)) % (s->latch + 2); - counter = (s->latch - counter) & 0xffff; + counter = (d - (ti->counter_value + 1)) % (ti->latch + 2); + counter = (ti->latch - counter) & 0xffff; } /* Note: we consider the irq is raised on 0 */ if (counter == 0xffff) { - next_time = d + s->latch + 1; + next_time = d + ti->latch + 1; } else if (counter == 0) { - next_time = d + s->latch + 2; + next_time = d + ti->latch + 2; } else { next_time = d + counter; } CUDA_DPRINTF("latch=%d counter=%" PRId64 " delta_next=%" PRId64 "\n", - s->latch, d, next_time - d); + ti->latch, d, next_time - d); next_time = muldiv64(next_time, NANOSECONDS_PER_SECOND, CUDA_TIMER_FREQ) + - s->load_time; - if (next_time <= current_time) + ti->load_time; + if (next_time <= current_time) { next_time = current_time + 1; + } return next_time; } |