Now Debug Agent library uses Local APIC Timer to implement time-out mechanism.
For AP, its local APIC timer may not work. This fix is to initialize Local
APIC timer if it doesn't work as expected when debugging AP function.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff....@intel.com>
CC: Ruiyu Ni <ruiyu...@intel.com>
---
.../Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git
a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
index 56a5e1a..f7fbb3c 100644
--- a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
@@ -365,9 +365,19 @@ InitializeDebugAgent (
IA32_DESCRIPTOR IdtDescriptor;
IA32_DESCRIPTOR *Ia32Idtr;
IA32_IDT_ENTRY *Ia32IdtEntry;
+ BOOLEAN PeriodicMode;
+ UINTN TimerCycle;
if (InitFlag == DEBUG_AGENT_INIT_DXE_AP) {
//
+ // Check if CPU APIC Timer is working, otherwise initialize it.
+ //
+ GetApicTimerState (NULL, &PeriodicMode, NULL);
+ TimerCycle = GetApicTimerInitCount ();
+ if (!PeriodicMode || TimerCycle == 0) {
+ InitializeDebugTimer (NULL, FALSE);
+ }
+ //
// Invoked by AP, enable interrupt to let AP could receive IPI from other
processors
//
EnableInterrupts ();
--
1.9.5.msysgit.0
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