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SourceLevelDebugPkg/DxeDebugAgent: Initialize Local APIC Timer 

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.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17604 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan 2015-06-10 01:45:18 +00:00 committed by vanjeff
parent 81338070fe
commit e2c8d3cff7
1 changed files with 10 additions and 0 deletions
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10
SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
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@ -365,8 +365,18 @@ 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
//