Jeff,
SetupDebugAgentEnvironment() behavior was changed but the function header
wasn't updated.
If the Local APIC Timer initialization is moved to
SetupDebugAgentEnvironment(), does it impact S3 debugging? Because
SetupDebugAgentEnvironment() is also called when DEBUG_AGENT_INIT_S3.
Thanks,
Ray
-----Original Message-----
From: Fan, Jeff
Sent: Thursday, May 14, 2015 4:42 PM
To: edk2-devel@lists.sourceforge.net
Cc: Ni, Ruiyu
Subject: [Patch 1/2] SourceLevelDebugPkg/DxeDebugAgent: Initialize Local APIC
Timer early
Now Debug Agent library uses Local APIC Timer to implement time-out mechanism.
But it does not initialize Local APIC Timer before transfer data with HOST.
This fix is to move Local APIC Timer initialization to
SetupDebugAgentEnviroment().
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 | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git
a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
index 601c5e8..6af934a 100644
--- a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
@@ -248,6 +248,7 @@ SetupDebugAgentEnviroment (
IA32_DESCRIPTOR Idtr;
UINT16 IdtEntryCount;
UINT64 DebugPortHandle;
+ UINT32 DebugTimerFrequency;
if (mMultiProcessorDebugSupport) {
InitializeSpinLock (&mDebugMpContext.MpContextSpinLock);
@@ -299,6 +300,11 @@ SetupDebugAgentEnviroment (
}
//
+ // Initialize Debug Timer hardware and save its initial count and frequency
+ //
+ mDebugMpContext.DebugTimerInitCount = InitializeDebugTimer
(&DebugTimerFrequency);
+ UpdateMailboxContent (mMailboxPointer, DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY,
DebugTimerFrequency);
+ //
// Initialize debug communication port
//
DebugPortHandle = (UINT64) (UINTN)DebugPortInitialize ((VOID
*)(UINTN)mMailboxPointer->DebugPortHandle, NULL);
@@ -355,7 +361,6 @@ InitializeDebugAgent (
IA32_DESCRIPTOR IdtDescriptor;
IA32_DESCRIPTOR *Ia32Idtr;
IA32_IDT_ENTRY *Ia32IdtEntry;
- UINT32 DebugTimerFrequency;
if (InitFlag == DEBUG_AGENT_INIT_DXE_AP) {
//
@@ -414,11 +419,6 @@ InitializeDebugAgent (
//
SetupDebugAgentEnviroment (Mailbox);
//
- // Initialize Debug Timer hardware and save its initial count and frequency
- //
- mDebugMpContext.DebugTimerInitCount = InitializeDebugTimer
(&DebugTimerFrequency);
- UpdateMailboxContent (mMailboxPointer,
DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);
- //
// For DEBUG_AGENT_INIT_S3, needn't to install configuration table and EFI
Serial IO protocol
// For DEBUG_AGENT_INIT_DXE_CORE, InternalConstructorWorker() will invoked
in Constructor()
//
@@ -507,11 +507,6 @@ InitializeDebugAgent (
//
SetupDebugAgentEnviroment (Mailbox);
//
- // Initialize Debug Timer hardware and save its initial count and frequency
- //
- mDebugMpContext.DebugTimerInitCount = InitializeDebugTimer
(&DebugTimerFrequency);
- UpdateMailboxContent (mMailboxPointer,
DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);
- //
// Enable interrupt to receive Debug Timer interrupt
//
EnableInterrupts ();
--
1.9.5.msysgit.0
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