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SourceLevelDebugPkg/SmmDebugAgent: Initialize Local APIC Timer 

Now Debug Agent library uses Local APIC Timer to implement time-out mechanism.
In SMM, SMM BSP maybe not be the one in DXE phase, its local APIC timer may not
work. This fix is to initialize Local APIC timer if it doesn't work as expected
at SMM entry.

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@17500 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan 2015-05-25 02:46:11 +00:00 committed by vanjeff
parent e9d6470bd8
commit edbb27132d
1 changed files with 11 additions and 1 deletions
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12
SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
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@ -190,6 +190,8 @@ InitializeDebugAgent (
DEBUG_AGENT_MAILBOX *Mailbox;
UINT64 *MailboxLocation;
UINT32 DebugTimerFrequency;
BOOLEAN PeriodicMode;
UINTN TimerCycle;
switch (InitFlag) {
case DEBUG_AGENT_INIT_SMM:
@ -275,7 +277,15 @@ InitializeDebugAgent (
case DEBUG_AGENT_INIT_ENTER_SMI:
SaveDebugRegister ();
InitializeDebugIdt ();
//
// Check if CPU APIC Timer is working, otherwise initialize it.
//
GetApicTimerState (NULL, &PeriodicMode, NULL);
TimerCycle = GetApicTimerInitCount ();
if (PeriodicMode != TRUE || TimerCycle == 0) {
InitializeDebugTimer (NULL);
DisableApicTimerInterrupt ();
}
Mailbox = GetMailboxPointer ();
if (GetDebugFlag (DEBUG_AGENT_FLAG_AGENT_IN_PROGRESS) == 1) {
//