allwinner-a10-pit: avoid generation of spurious interrupts

The model was generating interrupts for all enabled timers after the
expiration of one of them. Avoid this by passing explicitly the timer
index to the callback function.

Signed-off-by: Beniamino Galvani <[email protected]>
Reviewed-by: Li Guang <[email protected]>
Reviewed-by: Peter Crosthwaite <[email protected]>
Message-id: 1395771730[email protected]
[PMM: avoid duplicate typedef of AwA10PITState]
Signed-off-by: Peter Maydell <[email protected]>

diff --git a/hw/timer/allwinner-a10-pit.c b/hw/timer/allwinner-a10-pit.c
index b27fce8cd2d0fb5d9f711beb6400f0335ebd75e3..696b7d9977fea09143b24a2d55aadf76ad0e6278 100644 (file)
--- a/hw/timer/allwinner-a10-pit.c
+++ b/hw/timer/allwinner-a10-pit.c
@@ -193,18 +193,17 @@ static void a10_pit_reset(DeviceState *dev)
 
 static void a10_pit_timer_cb(void *opaque)
 {
-    AwA10PITState *s = AW_A10_PIT(opaque);
-    uint8_t i;
+    AwA10TimerContext *tc = opaque;
+    AwA10PITState *s = tc->container;
+    uint8_t i = tc->index;
 
-    for (i = 0; i < AW_A10_PIT_TIMER_NR; i++) {
-        if (s->control[i] & AW_A10_PIT_TIMER_EN) {
-            s->irq_status |= 1 << i;
-            if (s->control[i] & AW_A10_PIT_TIMER_MODE) {
-                ptimer_stop(s->timer[i]);
-                s->control[i] &= ~AW_A10_PIT_TIMER_EN;
-            }
-            qemu_irq_pulse(s->irq[i]);
+    if (s->control[i] & AW_A10_PIT_TIMER_EN) {
+        s->irq_status |= 1 << i;
+        if (s->control[i] & AW_A10_PIT_TIMER_MODE) {
+            ptimer_stop(s->timer[i]);
+            s->control[i] &= ~AW_A10_PIT_TIMER_EN;
         }
+        qemu_irq_pulse(s->irq[i]);
     }
 }
 
@@ -223,7 +222,11 @@ static void a10_pit_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 
     for (i = 0; i < AW_A10_PIT_TIMER_NR; i++) {
-        bh[i] = qemu_bh_new(a10_pit_timer_cb, s);
+        AwA10TimerContext *tc = &s->timer_context[i];
+
+        tc->container = s;
+        tc->index = i;
+        bh[i] = qemu_bh_new(a10_pit_timer_cb, tc);
         s->timer[i] = ptimer_init(bh[i]);
         ptimer_set_freq(s->timer[i], 240000);
     }

diff --git a/include/hw/timer/allwinner-a10-pit.h b/include/hw/timer/allwinner-a10-pit.h
index 15efab8b5f6933fede924135435e3435799216f4..2158fc0d7b4c45a3d0e8555a8f1482e00ca17b76 100644 (file)
--- a/include/hw/timer/allwinner-a10-pit.h
+++ b/include/hw/timer/allwinner-a10-pit.h
@@ -35,12 +35,20 @@
 
 #define AW_A10_PIT_DEFAULT_CLOCK   0x4
 
-typedef struct AwA10PITState {
+typedef struct AwA10PITState AwA10PITState;
+
+typedef struct AwA10TimerContext {
+    AwA10PITState *container;
+    int index;
+} AwA10TimerContext;
+
+struct AwA10PITState {
     /*< private >*/
     SysBusDevice parent_obj;
     /*< public >*/
     qemu_irq irq[AW_A10_PIT_TIMER_NR];
     ptimer_state * timer[AW_A10_PIT_TIMER_NR];
+    AwA10TimerContext timer_context[AW_A10_PIT_TIMER_NR];
     MemoryRegion iomem;
 
     uint32_t irq_enable;
@@ -53,6 +61,6 @@ typedef struct AwA10PITState {
     uint32_t count_lo;
     uint32_t count_hi;
     uint32_t count_ctl;
-} AwA10PITState;
+};
 
 #endif