diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2015-04-01 07:51:15 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-04-01 07:51:15 +0000 |
| commit | 08021523f8a581437b07986d2c1876a7b6f0d282 (patch) | |
| tree | 5a6684e3bcb26373da7ef36a7a2a818e67de0e0c /SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c | |
| parent | 206f412113e8be0da9bd6fd16f89c045ce0d8366 (diff) | |
| download | edk2-08021523f8a581437b07986d2c1876a7b6f0d282.tar.gz edk2-08021523f8a581437b07986d2c1876a7b6f0d282.tar.bz2 edk2-08021523f8a581437b07986d2c1876a7b6f0d282.zip | |
SourceLevelDebugPkg: Use CPU Local APIC timer to handle timeout.
Use CPU Local APIC timer to handle timeout when read data from debug port, instead of the TimerLib in Debug Communication lib instances.
It could remove much duplicated code in Debug Communication Lib instances.
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@17089 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c')
| -rw-r--r-- | SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c | 61 |
1 files changed, 55 insertions, 6 deletions
diff --git a/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c b/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c index 6b056150a3..bf06072b01 100644 --- a/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c +++ b/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.c @@ -1,7 +1,7 @@ /** @file
Code for debug timer to support debug agent library implementation.
- Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -17,31 +17,42 @@ /**
Initialize CPU local APIC timer.
+ @param[out] Local APIC timer frequency returned.
+
@return 32-bit Local APIC timer init count.
**/
UINT32
InitializeDebugTimer (
- VOID
+ OUT UINT32 *TimerFrequency
)
{
UINTN ApicTimerDivisor;
UINT32 InitialCount;
+ UINT32 ApicTimerFrequency;
GetApicTimerState (&ApicTimerDivisor, NULL, NULL);
-
+ ApicTimerFrequency = PcdGet32(PcdFSBClock) / (UINT32)ApicTimerDivisor;
//
// Cpu Local Apic timer interrupt frequency, it is set to 0.1s
//
InitialCount = (UINT32)DivU64x32 (
MultU64x64 (
- PcdGet32(PcdFSBClock) / (UINT32)ApicTimerDivisor,
- 100
+ ApicTimerFrequency,
+ DEBUG_TIMER_INTERVAL
),
- 1000
+ 1000000u
);
InitializeApicTimer (ApicTimerDivisor, InitialCount, TRUE, DEBUG_TIMER_VECTOR);
+ DEBUG ((EFI_D_INFO, "Debug Timer: FSB Clock = %d\n", PcdGet32(PcdFSBClock)));
+ DEBUG ((EFI_D_INFO, "Debug Timer: Divisor = %d\n", ApicTimerDivisor));
+ DEBUG ((EFI_D_INFO, "Debug Timer: Frequency = %d\n", ApicTimerFrequency));
+ DEBUG ((EFI_D_INFO, "Debug Timer: InitialCount = %d\n", InitialCount));
+
+ if (TimerFrequency != NULL) {
+ *TimerFrequency = ApicTimerFrequency;
+ }
return InitialCount;
}
@@ -87,3 +98,41 @@ SaveAndSetDebugTimerInterrupt ( return OldDebugTimerInterruptState;
}
+/**
+ Check if the timer is time out.
+
+ @param[in] TimerCycle Timer total count.
+ @param[in] Timer The start timer from the begin.
+ @param[in] TimeoutTicker Ticker number need time out.
+
+ @return TRUE Timer time out occurs.
+ @retval FALSE Timer does not time out.
+
+**/
+BOOLEAN
+IsDebugTimerTimeout (
+ IN UINT32 TimerCycle,
+ IN UINT32 Timer,
+ IN UINT32 TimeoutTicker
+ )
+{
+ UINT64 CurrentTimer;
+ UINT64 Delta;
+
+ CurrentTimer = GetApicTimerCurrentCount ();
+
+ //
+ // This timer counter counts down. Check for roll over condition.
+ //
+ if (CurrentTimer < Timer) {
+ Delta = Timer - CurrentTimer;
+ } else {
+ //
+ // Handle one roll-over.
+ //
+ Delta = TimerCycle - (CurrentTimer - Timer);
+ }
+
+ return (BOOLEAN) (Delta >= TimeoutTicker);
+}
+
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