The MetronomeDxe driver uses the PCD PcdMetronomeTickPeriod to calculate how many ticks to wait in MicroSecondDelay. Given that the timer clock on Juno runs at 50 MHz, it ticks every 20 ns; therefore, a setting of 1000 is wrong: for example it causes a call to gBS->Stall (1) to take 10 us.
The driver in MdeModulePkg/Universal/Metronome assumes the clock ticks at least every 100 ns, which is the minimum allowed by the Metronome protocol. Since that's the case on Juno, switch from EmbeddedPkg/MetronomeDxe to MdeModulePkg/Universal/Metronome. Signed-off-by: Rebecca Cran <[email protected]> --- Platform/ARM/JunoPkg/ArmJuno.dsc | 3 +-- Platform/ARM/JunoPkg/ArmJuno.fdf | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/Platform/ARM/JunoPkg/ArmJuno.dsc b/Platform/ARM/JunoPkg/ArmJuno.dsc index a00b866c5e9a..9cde4c862651 100644 --- a/Platform/ARM/JunoPkg/ArmJuno.dsc +++ b/Platform/ARM/JunoPkg/ArmJuno.dsc @@ -189,7 +189,6 @@ # ARM Architectural Timer Frequency # gArmTokenSpaceGuid.PcdArmArchTimerFreqInHz|50000000 - gEmbeddedTokenSpaceGuid.PcdMetronomeTickPeriod|1000 gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|FALSE @@ -248,10 +247,10 @@ MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf + MdeModulePkg/Universal/Metronome/Metronome.inf MdeModulePkg/Universal/MonotonicCounterRuntimeDxe/MonotonicCounterRuntimeDxe.inf MdeModulePkg/Universal/ResetSystemRuntimeDxe/ResetSystemRuntimeDxe.inf EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf - EmbeddedPkg/MetronomeDxe/MetronomeDxe.inf MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitterDxe.inf diff --git a/Platform/ARM/JunoPkg/ArmJuno.fdf b/Platform/ARM/JunoPkg/ArmJuno.fdf index fca5a78cee6c..836d3cde8781 100644 --- a/Platform/ARM/JunoPkg/ArmJuno.fdf +++ b/Platform/ARM/JunoPkg/ArmJuno.fdf @@ -96,10 +96,10 @@ FvNameGuid = B73FE497-B92E-416e-8326-45AD0D270092 INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf INF MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf + INF MdeModulePkg/Universal/Metronome/Metronome.inf INF MdeModulePkg/Universal/MonotonicCounterRuntimeDxe/MonotonicCounterRuntimeDxe.inf INF MdeModulePkg/Universal/ResetSystemRuntimeDxe/ResetSystemRuntimeDxe.inf INF EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf - INF EmbeddedPkg/MetronomeDxe/MetronomeDxe.inf INF MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf -- 2.30.2 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#100386): https://edk2.groups.io/g/devel/message/100386 Mute This Topic: https://groups.io/mt/97099988/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
