sandbox: timer: Support the early timer

Add support for the early timer so we can use tracing with sandbox again.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/timer/sandbox_timer.c b/drivers/timer/sandbox_timer.c
index a8da936..6a6411a 100644 (file)
--- a/drivers/timer/sandbox_timer.c
+++ b/drivers/timer/sandbox_timer.c
@@ -10,6 +10,8 @@
 #include <timer.h>
 #include <os.h>
 
+#define SANDBOX_TIMER_RATE     1000000
+
 /* system timer offset in ms */
 static unsigned long sandbox_timer_offset;
 
@@ -18,9 +20,19 @@ void sandbox_timer_add_offset(unsigned long offset)
        sandbox_timer_offset += offset;
 }
 
-static int sandbox_timer_get_count(struct udevice *dev, u64 *count)
+u64 notrace timer_early_get_count(void)
+{
+       return os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
+}
+
+unsigned long notrace timer_early_get_rate(void)
+{
+       return SANDBOX_TIMER_RATE;
+}
+
+static notrace int sandbox_timer_get_count(struct udevice *dev, u64 *count)
 {
-       *count = os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
+       *count = timer_early_get_count();
 
        return 0;
 }
@@ -30,7 +42,7 @@ static int sandbox_timer_probe(struct udevice *dev)
        struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
 
        if (!uc_priv->clock_rate)
-               uc_priv->clock_rate = 1000000;
+               uc_priv->clock_rate = SANDBOX_TIMER_RATE;
 
        return 0;
 }