diff options
Diffstat (limited to 'MdePkg/Library/DxeTimerLibEsal/DxeTimerLibEsal.c')
-rw-r--r-- | MdePkg/Library/DxeTimerLibEsal/DxeTimerLibEsal.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/MdePkg/Library/DxeTimerLibEsal/DxeTimerLibEsal.c b/MdePkg/Library/DxeTimerLibEsal/DxeTimerLibEsal.c deleted file mode 100644 index 8ca3ec6f8b..0000000000 --- a/MdePkg/Library/DxeTimerLibEsal/DxeTimerLibEsal.c +++ /dev/null @@ -1,223 +0,0 @@ -/** @file
- This library implements the Timer Library using the Extended SAL Stall Services Class.
-
- 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
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include <PiDxe.h>
-
-#include <Protocol/ExtendedSalServiceClasses.h>
-
-#include <Library/TimerLib.h>
-#include <Library/BaseLib.h>
-#include <Library/ExtendedSalLib.h>
-#include <Library/DebugLib.h>
-#include <Library/PalLib.h>
-
-/**
- Stalls the CPU for at least the given number of microseconds.
-
- This function wraps EsalStall function of Extended SAL Stall Services Class.
- It stalls the CPU for the number of microseconds specified by MicroSeconds.
-
- @param MicroSeconds The minimum number of microseconds to delay.
-
- @return MicroSeconds
-
-**/
-UINTN
-EFIAPI
-MicroSecondDelay (
- IN UINTN MicroSeconds
- )
-{
- EsalCall (
- EFI_EXTENDED_SAL_STALL_SERVICES_PROTOCOL_GUID_LO,
- EFI_EXTENDED_SAL_STALL_SERVICES_PROTOCOL_GUID_HI,
- StallFunctionId,
- MicroSeconds,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0
- );
- return MicroSeconds;
-}
-
-/**
- Stalls the CPU for at least the given number of nanoseconds.
-
- This function wraps EsalStall function of Extended SAL Stall Services Class.
- It stalls the CPU for the number of nanoseconds specified by NanoSeconds.
-
- @param NanoSeconds The minimum number of nanoseconds to delay.
-
- @return NanoSeconds
-
-**/
-UINTN
-EFIAPI
-NanoSecondDelay (
- IN UINTN NanoSeconds
- )
-{
- UINT64 MicroSeconds;
-
- //
- // The unit of ESAL Stall service is microsecond, so we turn the time interval
- // from nanosecond to microsecond, using the ceiling value to ensure stalling
- // at least the given number of nanoseconds.
- //
- MicroSeconds = DivU64x32 (NanoSeconds + 999, 1000);
- EsalCall (
- EFI_EXTENDED_SAL_STALL_SERVICES_PROTOCOL_GUID_LO,
- EFI_EXTENDED_SAL_STALL_SERVICES_PROTOCOL_GUID_HI,
- StallFunctionId,
- MicroSeconds,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0
- );
- return NanoSeconds;
-}
-
-/**
- Retrieves the current value of a 64-bit free running performance counter.
-
- Retrieves the current value of a 64-bit free running performance counter. The
- counter can either count up by 1 or count down by 1. If the physical
- performance counter counts by a larger increment, then the counter values
- must be translated. The properties of the counter can be retrieved from
- GetPerformanceCounterProperties().
-
- @return The current value of the free running performance counter.
-
-**/
-UINT64
-EFIAPI
-GetPerformanceCounter (
- VOID
- )
-{
- return AsmReadItc ();
-}
-
-/**
- Retrieves the 64-bit frequency in Hz and the range of performance counter
- values.
-
- If StartValue is not NULL, then the value that the performance counter starts
- with immediately after is it rolls over is returned in StartValue. If
- EndValue is not NULL, then the value that the performance counter end with
- immediately before it rolls over is returned in EndValue. The 64-bit
- frequency of the performance counter in Hz is always returned. If StartValue
- is less than EndValue, then the performance counter counts up. If StartValue
- is greater than EndValue, then the performance counter counts down. For
- example, a 64-bit free running counter that counts up would have a StartValue
- of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter
- that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0.
-
- @param StartValue The value the performance counter starts with when it
- rolls over.
- @param EndValue The value that the performance counter ends with before
- it rolls over.
-
- @return The frequency in Hz.
-
-**/
-UINT64
-EFIAPI
-GetPerformanceCounterProperties (
- OUT UINT64 *StartValue, OPTIONAL
- OUT UINT64 *EndValue OPTIONAL
- )
-{
- PAL_CALL_RETURN PalRet;
- UINT64 BaseFrequence;
-
- //
- // Get processor base frequency
- //
- PalRet = PalCall (PAL_FREQ_BASE, 0, 0, 0);
- ASSERT (PalRet.Status == 0);
- BaseFrequence = PalRet.r9;
-
- //
- // Get processor frequency ratio
- //
- PalRet = PalCall (PAL_FREQ_RATIOS, 0, 0, 0);
- ASSERT (PalRet.Status == 0);
-
- //
- // Start value of counter is 0
- //
- if (StartValue != NULL) {
- *StartValue = 0;
- }
-
- //
- // End value of counter is 0xFFFFFFFFFFFFFFFF
- //
- if (EndValue != NULL) {
- *EndValue = (UINT64)(-1);
- }
-
- 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;
-}
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