Add the minimal support that is needed by pl011's event and tracepoint.
Reviewed-by: Zhao Liu <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
---
rust/hw/core/src/qdev.rs | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/rust/hw/core/src/qdev.rs b/rust/hw/core/src/qdev.rs
index 71b9ef141c3..e384cad4d26 100644
--- a/rust/hw/core/src/qdev.rs
+++ b/rust/hw/core/src/qdev.rs
@@ -448,6 +448,39 @@ fn init_gpio_out(&self, pins: &[InterruptSource]) {
impl<R: ObjectDeref> DeviceMethods for R where R::Target: IsA<DeviceState> {}
+impl Clock {
+ pub const PERIOD_1SEC: u64 = bindings::CLOCK_PERIOD_1SEC;
+
+ pub const fn period_from_ns(ns: u64) -> u64 {
+ ns * Self::PERIOD_1SEC / 1_000_000_000
+ }
+
+ pub const fn period_from_hz(hz: u64) -> u64 {
+ if hz == 0 {
+ 0
+ } else {
+ Self::PERIOD_1SEC / hz
+ }
+ }
+
+ pub const fn period_to_hz(period: u64) -> u64 {
+ if period == 0 {
+ 0
+ } else {
+ Self::PERIOD_1SEC / period
+ }
+ }
+
+ pub const fn period(&self) -> u64 {
+ // SAFETY: Clock is returned by init_clock_in with zero value for
period
+ unsafe { &*self.0.as_ptr() }.period
+ }
+
+ pub const fn hz(&self) -> u64 {
+ Self::period_to_hz(self.period())
+ }
+}
+
unsafe impl ObjectType for Clock {
type Class = ObjectClass;
const TYPE_NAME: &'static CStr =
--
2.51.0
