mirror of https://github.com/acidanthera/audk.git
103 lines
2.3 KiB
C
Executable File
103 lines
2.3 KiB
C
Executable File
/** @file
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Copyright (c) 2008-2009, Apple Inc. All rights reserved.
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Base.h>
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#include <Library/BaseLib.h>
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#include <Library/TimerLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/IoLib.h>
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#include <Library/OmapLib.h>
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#include <Omap3530/Omap3530.h>
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UINTN
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EFIAPI
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MicroSecondDelay (
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IN UINTN MicroSeconds
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)
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{
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UINT64 NanoSeconds;
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NanoSeconds = MultU64x32(MicroSeconds, 1000);
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while (NanoSeconds > (UINTN)-1) {
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NanoSecondDelay((UINTN)-1);
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NanoSeconds -= (UINTN)-1;
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}
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NanoSecondDelay(NanoSeconds);
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return MicroSeconds;
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}
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UINTN
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EFIAPI
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NanoSecondDelay (
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IN UINTN NanoSeconds
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)
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{
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UINT32 Delay;
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UINT32 StartTime;
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UINT32 CurrentTime;
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UINT32 ElapsedTime;
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UINT32 TimerCountRegister;
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Delay = (NanoSeconds / PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds)) + 1;
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TimerCountRegister = TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR;
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StartTime = MmioRead32(TimerCountRegister);
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do
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{
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CurrentTime = MmioRead32(TimerCountRegister);
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ElapsedTime = CurrentTime - StartTime;
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} while (ElapsedTime < Delay);
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NanoSeconds = ElapsedTime * PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds);
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return NanoSeconds;
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}
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UINT64
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EFIAPI
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GetPerformanceCounter (
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VOID
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)
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{
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return (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR);
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}
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UINT64
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EFIAPI
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GetPerformanceCounterProperties (
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OUT UINT64 *StartValue, OPTIONAL
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OUT UINT64 *EndValue OPTIONAL
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)
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{
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if (StartValue != NULL) {
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// Timer starts with the reload value
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*StartValue = (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TLDR);
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}
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if (EndValue != NULL) {
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// Timer counts up to 0xFFFFFFFF
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*EndValue = 0xFFFFFFFF;
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}
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return PcdGet64(PcdEmbeddedPerformanceCounterFreqencyInHz);
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}
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