diff mbox series

[2/5] aspeed/timer: Status register contains reload for stopped timer

Message ID 20190314084235.9887-3-clg@kaod.org
State New
Headers show
Series aspeed/timer: Fix slowdowns in recent Linux | expand

Commit Message

Cédric Le Goater March 14, 2019, 8:42 a.m. UTC 
From: Andrew Jeffery <andrew@aj.id.au>

From the datasheet:

  This register stores the current status of counter #N. When timer
  enable bit TMC30[N * b] is disabled, the reload register will be
  loaded into this counter. When timer bit TMC30[N * b] is set, the
  counter will start to decrement. CPU can update this register value
  when enable bit is set.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/timer/aspeed_timer.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/timer/aspeed_timer.c b/hw/timer/aspeed_timer.c
index 9ffd8e09f670..2f8522a597d3 100644
--- a/hw/timer/aspeed_timer.c
+++ b/hw/timer/aspeed_timer.c
@@ -187,7 +187,11 @@  static uint64_t aspeed_timer_get_value(AspeedTimer *t, int reg)
 
     switch (reg) {
     case TIMER_REG_STATUS:
-        value = calculate_ticks(t, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
+        if (timer_enabled(t)) {
+            value = calculate_ticks(t, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
+        } else {
+            value = t->reload;
+        }
         break;
     case TIMER_REG_RELOAD:
         value = t->reload;