diff options
| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2015-11-11 22:49:48 +0000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2015-11-12 13:15:55 +1100 |
| commit | eda14abbb804f8ed2cb903c99ad1852848fa2e42 (patch) | |
| tree | 22f8a176634b5ed0af4fcf1d7705dd2cc79b9195 /hw/misc | |
| parent | b5ac04103bc3b24042418df1a561096187165fd7 (diff) | |
cuda.c: refactor get_tb() so that the time can be passed in
This is in preparation for sharing the code between timers.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/misc')
| -rw-r--r-- | hw/misc/macio/cuda.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c index c0a3a68025..e61a3c5967 100644 --- a/hw/misc/macio/cuda.c +++ b/hw/misc/macio/cuda.c @@ -143,10 +143,9 @@ static void cuda_update_irq(CUDAState *s) } } -static uint64_t get_tb(uint64_t freq) +static uint64_t get_tb(uint64_t time, uint64_t freq) { - return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), - freq, get_ticks_per_sec()); + return muldiv64(time, freq, get_ticks_per_sec()); } static unsigned int get_counter(CUDATimer *s) @@ -154,9 +153,10 @@ static unsigned int get_counter(CUDATimer *s) int64_t d; unsigned int counter; uint64_t tb_diff; + uint64_t current_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); /* Reverse of the tb calculation algorithm that Mac OS X uses on bootup. */ - tb_diff = get_tb(s->frequency) - s->load_time; + tb_diff = get_tb(current_time, s->frequency) - s->load_time; d = (tb_diff * 0xBF401675E5DULL) / (s->frequency << 24); if (s->index == 0) { @@ -176,7 +176,8 @@ static unsigned int get_counter(CUDATimer *s) static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val) { CUDA_DPRINTF("T%d.counter=%d\n", 1 + (ti->timer == NULL), val); - ti->load_time = get_tb(s->frequency); + ti->load_time = get_tb(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), + s->frequency); ti->counter_value = val; cuda_timer_update(s, ti, ti->load_time); } |