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Diffstat (limited to 'MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c')
| -rw-r--r-- | MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c deleted file mode 100644 index f5a8f7d2717f..000000000000 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c +++ /dev/null @@ -1,216 +0,0 @@ -/** @file - Timer Library functions built upon ITC on IPF. - - 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 - 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 <Base.h> -#include <Library/TimerLib.h> -#include <Library/BaseLib.h> -#include <Library/PalLib.h> - - -/** - Performs a delay measured as number of ticks. - - An internal function to perform a delay measured as number of ticks. It's - invoked by MicroSecondDelay() and NanoSecondDelay(). - - @param Delay The number of ticks to delay. - -**/ -VOID -EFIAPI -InternalIpfDelay ( - IN INT64 Delay - ) -{ - INT64 Ticks; - - // - // The target timer count is calculated here - // - Ticks = (INT64)AsmReadItc () + Delay; - - // - // Wait until time out - // Delay > 2^63 could not be handled by this function - // Timer wrap-arounds are handled correctly by this function - // - while (Ticks - (INT64)AsmReadItc() >= 0); -} - -/** - Stalls the CPU for at least the given number of microseconds. - - Stalls the CPU for the number of microseconds specified by MicroSeconds. - - @param MicroSeconds The minimum number of microseconds to delay. - - @return The value of MicroSeconds inputted. - -**/ -UINTN -EFIAPI -MicroSecondDelay ( - IN UINTN MicroSeconds - ) -{ - InternalIpfDelay ( - GetPerformanceCounterProperties (NULL, NULL) * - MicroSeconds / - 1000000 - ); - return MicroSeconds; -} - -/** - Stalls the CPU for at least the given number of nanoseconds. - - Stalls the CPU for the number of nanoseconds specified by NanoSeconds. - - @param NanoSeconds The minimum number of nanoseconds to delay. - - @return The value of NanoSeconds inputted. - -**/ -UINTN -EFIAPI -NanoSecondDelay ( - IN UINTN NanoSeconds - ) -{ - InternalIpfDelay ( - GetPerformanceCounterProperties (NULL, NULL) * - NanoSeconds / - 1000000000 - ); - return NanoSeconds; -} - -/** - 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; - - if (StartValue != NULL) { - *StartValue = 0; - } - - if (EndValue != NULL) { - *EndValue = (UINT64)(-1); - } - - PalRet = PalCall (PAL_FREQ_BASE, 0, 0, 0); - if (PalRet.Status != 0) { - return 1000000; - } - BaseFrequence = PalRet.r9; - - PalRet = PalCall (PAL_FREQ_RATIOS, 0, 0, 0); - if (PalRet.Status != 0) { - return 1000000; - } - - 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; -} |