From 7687d3a83591370a104684d244c9cecb4e1499b8 Mon Sep 17 00:00:00 2001 From: eric_tian Date: Fri, 11 Jul 2008 07:06:56 +0000 Subject: modify coding style to pass ecc tool and provide comments that complied with Doxgen. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5452 6f19259b-4bc3-4df7-8a09-765794883524 --- MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c | 1 - .../SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf | 4 +- MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c | 248 ++++++++++++++++++++ MdePkg/Library/SecPeiDxeTimerLibCpu/x86TimerLib.c | 252 --------------------- 4 files changed, 250 insertions(+), 255 deletions(-) create mode 100644 MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c delete mode 100644 MdePkg/Library/SecPeiDxeTimerLibCpu/x86TimerLib.c diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c index cb5c6d4..9e47772 100644 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c @@ -30,7 +30,6 @@ @param Delay Number of ticks to delay. **/ -STATIC VOID InternalIpfDelay ( IN INT64 Delay diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf index 377d269..059fff1 100644 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf @@ -34,10 +34,10 @@ # [Sources.Ia32] - x86TimerLib.c + X86TimerLib.c [Sources.X64] - x86TimerLib.c + X86TimerLib.c [Sources.IPF] IpfTimerLib.c diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c new file mode 100644 index 0000000..99b75d5 --- /dev/null +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c @@ -0,0 +1,248 @@ +/** @file + Timer Library functions built upon local APIC on IA32/x64. + + Copyright (c) 2006 - 2008, Intel Corporation
+ All rights reserved. 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 +#include +#include +#include +#include +#include + + +// +// 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. + + Internal function to retrieve the base address of local APIC. + + @return The base address of local APIC + +**/ +UINTN +InternalX86GetApicBase ( + VOID + ) +{ + return (UINTN)AsmMsrBitFieldRead64 (27, 12, 35) << 12; +} + +/** + Internal function to return the frequency of the local APIC timer. + + 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 +InternalX86GetTimerFrequency ( + IN UINTN ApicBase + ) +{ + return + PcdGet32(PcdFSBClock) / + mTimerLibLocalApicDivisor[MmioBitFieldRead32 (ApicBase + 0x3e0, 0, 3)]; +} + +/** + Internal function to read the current tick counter of local APIC. + + 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 +InternalX86GetTimerTick ( + IN UINTN ApicBase + ) +{ + return MmioRead32 (ApicBase + 0x390); +} + +/** + 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 +InternalX86Delay ( + IN UINTN ApicBase, + IN UINT32 Delay + ) +{ + INT32 Ticks; + + // + // The target timer count is calculated here + // + Ticks = InternalX86GetTimerTick (ApicBase) - Delay; + + // + // Wait until time out + // Delay > 2^31 could not be handled by this function + // Timer wrap-arounds are handled correctly by this function + // + while (InternalX86GetTimerTick (ApicBase) - Ticks >= 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 MicroSeconds + +**/ +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 NanoSeconds + +**/ +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. + + 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 = MmioRead32 (ApicBase + 0x380); + } + + if (EndValue != NULL) { + *EndValue = 0; + } + + return (UINT64) InternalX86GetTimerFrequency (ApicBase);; +} diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/x86TimerLib.c b/MdePkg/Library/SecPeiDxeTimerLibCpu/x86TimerLib.c deleted file mode 100644 index 263ce9a..0000000 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/x86TimerLib.c +++ /dev/null @@ -1,252 +0,0 @@ -/** @file - Timer Library functions built upon local APIC on IA32/x64. - - Copyright (c) 2006 - 2007, Intel Corporation
- All rights reserved. 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 -#include -#include -#include -#include -#include - - -// -// 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. - - Internal function to retrieve the base address of local APIC. - - @return The base address of local APIC - -**/ -STATIC -UINTN -InternalX86GetApicBase ( - VOID - ) -{ - return (UINTN)AsmMsrBitFieldRead64 (27, 12, 35) << 12; -} - -/** - Internal function to return the frequency of the local APIC timer. - - 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. - -**/ -STATIC -UINT32 -InternalX86GetTimerFrequency ( - IN UINTN ApicBase - ) -{ - return - PcdGet32(PcdFSBClock) / - mTimerLibLocalApicDivisor[MmioBitFieldRead32 (ApicBase + 0x3e0, 0, 3)]; -} - -/** - Internal function to read the current tick counter of local APIC. - - 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. - -**/ -STATIC -INT32 -InternalX86GetTimerTick ( - IN UINTN ApicBase - ) -{ - return MmioRead32 (ApicBase + 0x390); -} - -/** - 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. - -**/ -STATIC -VOID -InternalX86Delay ( - IN UINTN ApicBase, - IN UINT32 Delay - ) -{ - INT32 Ticks; - - // - // The target timer count is calculated here - // - Ticks = InternalX86GetTimerTick (ApicBase) - Delay; - - // - // Wait until time out - // Delay > 2^31 could not be handled by this function - // Timer wrap-arounds are handled correctly by this function - // - while (InternalX86GetTimerTick (ApicBase) - Ticks >= 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 MicroSeconds - -**/ -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 NanoSeconds - -**/ -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. - - 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 = MmioRead32 (ApicBase + 0x380); - } - - if (EndValue != NULL) { - *EndValue = 0; - } - - return (UINT64) InternalX86GetTimerFrequency (ApicBase);; -} -- cgit v1.1