cuda: set timer 1 frequency property to CUDA_TIMER_FREQ

Now that we have successfully decoupled the timebase frequency and the hardware
timer frequency, set the timer 1 frequency property to CUDA_TIMER_FREQ and alter
get_next_irq_time() to use it rather than the hard-coded constant.

In addition to this we must now switch the tb_diff calculation over to use the
timebase frequency now that the hardware clock frequency and the timebase
frequency are different.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
[dwg: Correct a conflict due to a bug in an earlier patch]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 5 insertions, 5 deletions

diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index 355a2f2..e00df4a 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -158,8 +158,8 @@ static unsigned int get_counter(CUDAState *s, CUDATimer *ti)
     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(current_time, ti->frequency) - ti->load_time;
-    d = (tb_diff * 0xBF401675E5DULL) / (ti->frequency << 24);
+    tb_diff = get_tb(current_time, s->tb_frequency) - ti->load_time;
+    d = (tb_diff * 0xBF401675E5DULL) / (s->tb_frequency << 24);
 
     if (ti->index == 0) {
         /* the timer goes down from latch to -1 (period of latch + 2) */
@@ -191,7 +191,7 @@ static int64_t get_next_irq_time(CUDATimer *ti, int64_t current_time)
 
     /* current counter value */
     d = muldiv64(current_time - ti->load_time,
-                 CUDA_TIMER_FREQ, NANOSECONDS_PER_SECOND);
+                 ti->frequency, NANOSECONDS_PER_SECOND);
     /* the timer goes down from latch to -1 (period of latch + 2) */
     if (d <= (ti->counter_value + 1)) {
         counter = (ti->counter_value - d) & 0xffff;
@@ -210,7 +210,7 @@ static int64_t get_next_irq_time(CUDATimer *ti, int64_t current_time)
     }
     CUDA_DPRINTF("latch=%d counter=%" PRId64 " delta_next=%" PRId64 "\n",
                  ti->latch, d, next_time - d);
-    next_time = muldiv64(next_time, NANOSECONDS_PER_SECOND, CUDA_TIMER_FREQ) +
+    next_time = muldiv64(next_time, NANOSECONDS_PER_SECOND, ti->frequency) +
                          ti->load_time;
     if (next_time <= current_time) {
         next_time = current_time + 1;
@@ -879,7 +879,7 @@ static void cuda_realizefn(DeviceState *dev, Error **errp)
     struct tm tm;
 
     s->timers[0].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, cuda_timer1, s);
-    s->timers[0].frequency = s->tb_frequency;
+    s->timers[0].frequency = CUDA_TIMER_FREQ;
     s->timers[1].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, cuda_timer2, s);
     s->timers[1].frequency = (SCALE_US * 6000) / 4700;