diff options
Diffstat (limited to 'MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c')
| -rw-r--r-- | MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c deleted file mode 100644 index 7b2bc54934..0000000000 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c +++ /dev/null @@ -1,340 +0,0 @@ -/** @file
- Timer Library functions built upon local APIC on IA32/x64.
-
- Copyright (c) 2006 - 2013, 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/IoLib.h>
-#include <Library/PcdLib.h>
-#include <Library/DebugLib.h>
-
-#define APIC_LVTERR 0x370
-#define APIC_TMICT 0x380
-#define APIC_TMCCT 0x390
-#define APIC_TDCR 0x3e0
-
-//
-// The following array is used in calculating the frequency of local APIC
-// timer. Refer to IA-32 developers' manual for more details.
-//
-GLOBAL_REMOVE_IF_UNREFERENCED
-CONST UINT8 mTimerLibLocalApicDivisor[] = {
- 0x02, 0x04, 0x08, 0x10,
- 0x02, 0x04, 0x08, 0x10,
- 0x20, 0x40, 0x80, 0x01,
- 0x20, 0x40, 0x80, 0x01
-};
-
-/**
- Internal function to retrieve the base address of local APIC.
-
- @return The base address of local APIC
-
-**/
-UINTN
-EFIAPI
-InternalX86GetApicBase (
- VOID
- )
-{
- return (UINTN)AsmMsrBitFieldRead64 (27, 12, 35) << 12;
-}
-
-/**
- Internal function to return the frequency of the local APIC timer.
-
- @param ApicBase The base address of memory mapped registers of local APIC.
-
- @return The frequency of the timer in Hz.
-
-**/
-UINT32
-EFIAPI
-InternalX86GetTimerFrequency (
- IN UINTN ApicBase
- )
-{
- return
- PcdGet32(PcdFSBClock) /
- mTimerLibLocalApicDivisor[MmioBitFieldRead32 (ApicBase + APIC_TDCR, 0, 3)];
-}
-
-/**
- Internal function to read the current tick counter of local APIC.
-
- @param ApicBase The base address of memory mapped registers of local APIC.
-
- @return The tick counter read.
-
-**/
-INT32
-EFIAPI
-InternalX86GetTimerTick (
- IN UINTN ApicBase
- )
-{
- return MmioRead32 (ApicBase + APIC_TMCCT);
-}
-
-/**
- Internal function to read the initial timer count of local APIC.
-
- @param ApicBase The base address of memory mapped registers of local APIC.
-
- @return The initial timer count read.
-
-**/
-UINT32
-InternalX86GetInitTimerCount (
- IN UINTN ApicBase
- )
-{
- return MmioRead32 (ApicBase + APIC_TMICT);
-}
-
-/**
- Stalls the CPU for at least the given number of ticks.
-
- Stalls the CPU for at least the given number of ticks. It's invoked by
- MicroSecondDelay() and NanoSecondDelay().
-
- @param ApicBase The base address of memory mapped registers of local APIC.
- @param Delay A period of time to delay in ticks.
-
-**/
-VOID
-EFIAPI
-InternalX86Delay (
- IN UINTN ApicBase,
- IN UINT32 Delay
- )
-{
- INT32 Ticks;
- UINT32 Times;
- UINT32 InitCount;
- UINT32 StartTick;
-
- //
- // In case Delay is too larger, separate it into several small delay slot.
- // Devided Delay by half value of Init Count is to avoid Delay close to
- // the Init Count, timeout maybe missing if the time consuming between 2
- // GetApicTimerCurrentCount() invoking is larger than the time gap between
- // Delay and the Init Count.
- //
- InitCount = InternalX86GetInitTimerCount (ApicBase);
- Times = Delay / (InitCount / 2);
- Delay = Delay % (InitCount / 2);
-
- //
- // Get Start Tick and do delay
- //
- StartTick = InternalX86GetTimerTick (ApicBase);
- do {
- //
- // Wait until time out by Delay value
- //
- do {
- CpuPause ();
- //
- // Get Ticks from Start to Current.
- //
- Ticks = StartTick - InternalX86GetTimerTick (ApicBase);
- //
- // Ticks < 0 means Timer wrap-arounds happens.
- //
- if (Ticks < 0) {
- Ticks += InitCount;
- }
- } while ((UINT32)Ticks < Delay);
-
- //
- // Update StartTick and Delay for next delay slot
- //
- StartTick -= (StartTick > Delay) ? Delay : (Delay - InitCount);
- Delay = InitCount / 2;
- } while (Times-- > 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
- )
-{
- UINTN ApicBase;
-
- ApicBase = InternalX86GetApicBase ();
- InternalX86Delay (
- ApicBase,
- (UINT32)DivU64x32 (
- MultU64x64 (
- InternalX86GetTimerFrequency (ApicBase),
- MicroSeconds
- ),
- 1000000u
- )
- );
- 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
- )
-{
- UINTN ApicBase;
-
- ApicBase = InternalX86GetApicBase ();
- InternalX86Delay (
- ApicBase,
- (UINT32)DivU64x32 (
- MultU64x64 (
- InternalX86GetTimerFrequency (ApicBase),
- NanoSeconds
- ),
- 1000000000u
- )
- );
- 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 (UINT64)(UINT32)InternalX86GetTimerTick (InternalX86GetApicBase ());
-}
-
-/**
- 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
- )
-{
- UINTN ApicBase;
-
- ApicBase = InternalX86GetApicBase ();
-
- if (StartValue != NULL) {
- *StartValue = (UINT64)InternalX86GetInitTimerCount (ApicBase);
- }
-
- if (EndValue != NULL) {
- *EndValue = 0;
- }
-
- 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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