diff options
| author | xdu2 <xdu2@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-08-25 05:59:17 +0000 |
|---|---|---|
| committer | xdu2 <xdu2@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-08-25 05:59:17 +0000 |
| commit | b9610b9cb5b34b202251d8e08c02a788240e4cdd (patch) | |
| tree | 09775a466b5315657279f1f51625c6466412af61 /MdePkg | |
| parent | 6e5ed099afee619553a1eb1bea79b1f99658ec84 (diff) | |
| download | edk2-platforms-b9610b9cb5b34b202251d8e08c02a788240e4cdd.tar.xz | |
Add new API GetTimeInNanoSecond() to TimerLib to convert elapsed ticks to time in unit of nanoseconds.
Signed-off-by: xdu2
Reviewed-by: mdkinney
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12206 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg')
| -rw-r--r-- | MdePkg/Include/Library/TimerLib.h | 19 | ||||
| -rw-r--r-- | MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c | 23 | ||||
| -rw-r--r-- | MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c | 46 | ||||
| -rw-r--r-- | MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c | 46 |
4 files changed, 130 insertions, 4 deletions
diff --git a/MdePkg/Include/Library/TimerLib.h b/MdePkg/Include/Library/TimerLib.h index c42f894186..ecc3ad3ff7 100644 --- a/MdePkg/Include/Library/TimerLib.h +++ b/MdePkg/Include/Library/TimerLib.h @@ -1,7 +1,7 @@ /** @file
Provides calibrated delay and performance counter services.
-Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2011, 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
@@ -94,4 +94,21 @@ GetPerformanceCounterProperties ( OUT UINT64 *EndValue OPTIONAL
);
+/**
+ Converts elapsed ticks of performance counter to time in nanoseconds.
+
+ This function converts the elapsed ticks of running performance counter to
+ time value in unit of nanoseconds.
+
+ @param Ticks The number of elapsed ticks of running performance counter.
+
+ @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+ IN UINT64 Ticks
+ );
+
#endif
diff --git a/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c b/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c index 0c79b21f6f..d06cd0f399 100644 --- a/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c +++ b/MdePkg/Library/BaseTimerLibNullTemplate/TimerLibNull.c @@ -1,7 +1,7 @@ /** @file
A non-functional instance of the Timer Library.
- Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2007 - 2011, 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
@@ -111,3 +111,24 @@ GetPerformanceCounterProperties ( return (UINT64)(-1);
}
+
+/**
+ Converts elapsed ticks of performance counter to time in nanoseconds.
+
+ This function converts the elapsed ticks of running performance counter to
+ time value in unit of nanoseconds.
+
+ @param Ticks The number of elapsed ticks of running performance counter.
+
+ @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+ IN UINT64 Ticks
+ )
+{
+ ASSERT (FALSE);
+ return 0;
+}
diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c index 06d5a3cebc..714b99eec4 100644 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c @@ -1,7 +1,7 @@ /** @file
Timer Library functions built upon ITC on IPF.
- Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2011, 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
@@ -170,3 +170,47 @@ GetPerformanceCounterProperties ( return BaseFrequence * (PalRet.r11 >> 32) / (UINT32)PalRet.r11;
}
+
+/**
+ Converts elapsed ticks of performance counter to time in nanoseconds.
+
+ This function converts the elapsed ticks of running performance counter to
+ time value in unit of nanoseconds.
+
+ @param Ticks The number of elapsed ticks of running performance counter.
+
+ @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+ IN UINT64 Ticks
+ )
+{
+ UINT64 Frequency;
+ UINT64 NanoSeconds;
+ UINT64 Remainder;
+ INTN Shift;
+
+ Frequency = GetPerformanceCounterProperties (NULL, NULL);
+
+ //
+ // Ticks
+ // Time = --------- x 1,000,000,000
+ // Frequency
+ //
+ NanoSeconds = MultU64x32 (DivU64x64Remainder (Ticks, Frequency, &Remainder), 1000000000u);
+
+ //
+ // Ensure (Remainder * 1,000,000,000) will not overflow 64-bit.
+ // Since 2^29 < 1,000,000,000 = 0x3B9ACA00 < 2^30, Remainder should < 2^(64-30) = 2^34,
+ // i.e. highest bit set in Remainder should <= 33.
+ //
+ Shift = MAX (0, HighBitSet64 (Remainder) - 33);
+ Remainder = RShiftU64 (Remainder, (UINTN) Shift);
+ Frequency = RShiftU64 (Frequency, (UINTN) Shift);
+ NanoSeconds += DivU64x64Remainder (MultU64x32 (Remainder, 1000000000u), Frequency, NULL);
+
+ return NanoSeconds;
+}
diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c index 6d4b0938e9..ffd6cc2714 100644 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c @@ -1,7 +1,7 @@ /** @file
Timer Library functions built upon local APIC on IA32/x64.
- Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2011, 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
@@ -255,3 +255,47 @@ GetPerformanceCounterProperties ( return (UINT64) InternalX86GetTimerFrequency (ApicBase);
}
+
+/**
+ Converts elapsed ticks of performance counter to time in nanoseconds.
+
+ This function converts the elapsed ticks of running performance counter to
+ time value in unit of nanoseconds.
+
+ @param Ticks The number of elapsed ticks of running performance counter.
+
+ @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+ IN UINT64 Ticks
+ )
+{
+ UINT64 Frequency;
+ UINT64 NanoSeconds;
+ UINT64 Remainder;
+ INTN Shift;
+
+ Frequency = GetPerformanceCounterProperties (NULL, NULL);
+
+ //
+ // Ticks
+ // Time = --------- x 1,000,000,000
+ // Frequency
+ //
+ NanoSeconds = MultU64x32 (DivU64x64Remainder (Ticks, Frequency, &Remainder), 1000000000u);
+
+ //
+ // Ensure (Remainder * 1,000,000,000) will not overflow 64-bit.
+ // Since 2^29 < 1,000,000,000 = 0x3B9ACA00 < 2^30, Remainder should < 2^(64-30) = 2^34,
+ // i.e. highest bit set in Remainder should <= 33.
+ //
+ Shift = MAX (0, HighBitSet64 (Remainder) - 33);
+ Remainder = RShiftU64 (Remainder, (UINTN) Shift);
+ Frequency = RShiftU64 (Frequency, (UINTN) Shift);
+ NanoSeconds += DivU64x64Remainder (MultU64x32 (Remainder, 1000000000u), Frequency, NULL);
+
+ return NanoSeconds;
+}
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