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author | Adam <you@example.com> | 2020-05-17 05:51:50 +0200 |
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committer | Adam <you@example.com> | 2020-05-17 05:51:50 +0200 |
commit | e611b132f9b8abe35b362e5870b74bce94a1e58e (patch) | |
tree | a5781d2ec0e085eeca33cf350cf878f2efea6fe5 /private/ntos/nthals/hal0jens/alpha/xxinithl.c | |
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Diffstat (limited to 'private/ntos/nthals/hal0jens/alpha/xxinithl.c')
-rw-r--r-- | private/ntos/nthals/hal0jens/alpha/xxinithl.c | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/private/ntos/nthals/hal0jens/alpha/xxinithl.c b/private/ntos/nthals/hal0jens/alpha/xxinithl.c new file mode 100644 index 000000000..bcef74730 --- /dev/null +++ b/private/ntos/nthals/hal0jens/alpha/xxinithl.c @@ -0,0 +1,606 @@ +/*++ + +Copyright (c) 1991 Microsoft Corporation + +Module Name: + + xxinithl.c + +Abstract: + + + This module implements the initialization of the system dependent + functions that define the Hardware Architecture Layer (HAL) for an + Alpha machine + +Author: + + David N. Cutler (davec) 25-Apr-1991 + Miche Baker-Harvey (miche) 18-May-1992 + +Environment: + + Kernel mode only. + +Revision History: + + 28-Jul-1992 Jeff McLeman (mcleman) + Add code to allocate a mapping buffer for buffered DMA + + 14-Jul-1992 Jeff McLeman (mcleman) + Add call to HalpCachePcrValues, which will call the PALcode to + cache values of the PCR that need fast access. + + 10-Jul-1992 Jeff McLeman (mcleman) + Remove reference to initializing the fixed TB entries, since Alpha + does not have fixed TB entries. + +--*/ + +#include "halp.h" +#include "eisa.h" +#include "jxisa.h" +#include "jnsnrtc.h" + +ULONG HalpBusType = MACHINE_TYPE_EISA; +ULONG HalpMapBufferSize; +PHYSICAL_ADDRESS HalpMapBufferPhysicalAddress; + +typedef +BOOLEAN +KBUS_ERROR_ROUTINE ( + IN struct _EXCEPTION_RECORD *ExceptionRecord, + IN struct _KEXCEPTION_FRAME *ExceptionFrame, + IN struct _KTRAP_FRAME *TrapFrame + ); + +KBUS_ERROR_ROUTINE HalMachineCheck; + +// +// HalpClockFrequency is the processor cycle counter frequency in units +// of cycles per second (Hertz). It is a large number (e.g., 125,000,000) +// but will still fit in a ULONG. +// +// HalpClockMegaHertz is the processor cycle counter frequency in units +// of megahertz. It is a small number (e.g., 125) and is also the number +// of cycles per microsecond. The assumption here is that clock rates will +// always be an integral number of megahertz. +// +// Having the frequency available in both units avoids multiplications, or +// especially divisions in time critical code. +// + +ULONG HalpClockFrequency; +ULONG HalpClockMegaHertz; + +// +// Use the square wave mode of the PIT to measure the processor +// speed. The timer has a frequency of 1.193MHz. We want a +// square wave with a period of 50ms so we must initialize the +// pit with a count of: +// 50ms*1.193MHz = 59650 cycles +// + +#define TIMER_REF_VALUE 59650 + +ULONG +HalpQuerySystemFrequency( + ULONG SampleTime + ); + +BOOLEAN +HalInitSystem ( + IN ULONG Phase, + IN PLOADER_PARAMETER_BLOCK LoaderBlock + ) + +/*++ + +Routine Description: + + This function initializes the Hardware Architecture Layer (HAL) for an + Alpha system. + +Arguments: + + Phase - Supplies the initialization phase (zero or one). + + LoaderBlock - Supplies a pointer to a loader parameter block. + +Return Value: + + A value of TRUE is returned is the initialization was successfully + complete. Otherwise a value of FALSE is returend. + +--*/ + +{ + PKPRCB Prcb; + + if (Phase == 0) { + + // + // Phase 0 initialization. + // + + // + // Set the time increment value. + // + + HalpCurrentTimeIncrement = MAXIMUM_INCREMENT; + HalpNextTimeIncrement = MAXIMUM_INCREMENT; + HalpNextRateSelect = 0; + KeSetTimeIncrement( MAXIMUM_INCREMENT, MINIMUM_INCREMENT ); + + HalpMapIoSpace(); + HalpInitializeInterrupts(); + HalpCreateDmaStructures(); + HalpInitializeDisplay(LoaderBlock); + HalpCachePcrValues(); + + // + // Fill in handlers for APIs which this HAL supports + // + + HalQuerySystemInformation = HaliQuerySystemInformation; + HalSetSystemInformation = HaliSetSystemInformation; + + // + // Establish the machine check handler for in the PCR. + // + + PCR->MachineCheckError = HalMachineCheck; + + // + // Verify Prcb major version number, and build options are + // all conforming to this binary image + // + + Prcb = KeGetCurrentPrcb(); +#if DBG + if (!(Prcb->BuildType & PRCB_BUILD_DEBUG)) { + // This checked hal requires a checked kernel + KeBugCheckEx (MISMATCHED_HAL, 2, Prcb->BuildType, PRCB_BUILD_DEBUG, 0); + } +#else + if (Prcb->BuildType & PRCB_BUILD_DEBUG) { + // This free hal requires a free kernel + KeBugCheckEx (MISMATCHED_HAL, 2, Prcb->BuildType, 0, 0); + } +#endif +#ifndef NT_UP + if (Prcb->BuildType & PRCB_BUILD_UNIPROCESSOR) { + // This MP hal requires an MP kernel + KeBugCheckEx (MISMATCHED_HAL, 2, Prcb->BuildType, 0, 0); + } +#endif + if (Prcb->MajorVersion != PRCB_MAJOR_VERSION) { + KeBugCheckEx (MISMATCHED_HAL, + 1, Prcb->MajorVersion, PRCB_MAJOR_VERSION, 0); + } + + // + // Now alocate a mapping buffer for buffered DMA. + // + + LessThan16Mb = FALSE; + + HalpMapBufferSize = INITIAL_MAP_BUFFER_LARGE_SIZE; + HalpMapBufferPhysicalAddress.LowPart = + HalpAllocPhysicalMemory (LoaderBlock, MAXIMUM_ISA_PHYSICAL_ADDRESS, + HalpMapBufferSize >> PAGE_SHIFT, TRUE); + HalpMapBufferPhysicalAddress.HighPart = 0; + + if (!HalpMapBufferPhysicalAddress.LowPart) { + HalpMapBufferSize = 0; + } + + // + // Setup special memory AFTER we've allocated our COMMON BUFFER! + // + + HalpInitializeSpecialMemory( LoaderBlock ); + + return TRUE; + + } else { + + // + // Phase 1 initialization. + // + + HalpCalibrateStall(); + + // + // Initialize the existing bus handlers. + // + + HalpRegisterInternalBusHandlers(); + + // + // Allocate pool for evnironment variable support + // + + if (HalpEnvironmentInitialize() != 0) { + HalDisplayString(" No pool available for Environment Variables\n"); + } + + return TRUE; + + } +} + + +VOID +HalInitializeProcessor ( + IN ULONG Number + ) + +/*++ + +Routine Description: + + This function is called early in the initialization of the kernel + to perform platform dependent initialization for each processor + before the HAL Is fully functional. + + N.B. When this routine is called, the PCR is present but is not + fully initialized. + +Arguments: + + Number - Supplies the number of the processor to initialize. + +Return Value: + + None. + +--*/ + +{ + return; +} + +BOOLEAN +HalStartNextProcessor ( + IN PLOADER_PARAMETER_BLOCK LoaderBlock, + IN PKPROCESSOR_STATE ProcessorState + ) + +/*++ + +Routine Description: + + This function is called to start the next processor. + +Arguments: + + LoaderBlock - Supplies a pointer to the loader parameter block. + + ProcessorState - Supplies a pointer to the processor state to be + used to start the processor. + +Return Value: + + If a processor is successfully started, then a value of TRUE is + returned. Otherwise a value of FALSE is returned. + +--*/ + +{ + return FALSE; +} +VOID +HalpVerifyPrcbVersion () +{ + +} + + +ULONG +HalpQuerySystemFrequency( + ULONG SampleTime + ) +/*++ + +Routine Description: + + This routine returns the speed at which the system is running in hertz. + The system frequency is calculated by counting the number of processor + cycles that occur during 500ms, using the Programmable Interval Timer + (PIT) as the reference time. The PIT is used to generate a square + wave with a 50ms Period. We use the Speaker counter since we can + enable and disable the count from software. The output of the + speaker is obtained from the SIO NmiStatus register. + +Arguments: + + None. + +Return Value: + + The system frequency in Hertz. + +--*/ +{ + TIMER_CONTROL TimerControlSetup; + TIMER_CONTROL TimerControlReadStatus; + TIMER_STATUS TimerStatus; + NMI_STATUS NmiStatus; + PEISA_CONTROL controlBase; + ULONGLONG Count1; + ULONGLONG Count2; + ULONG NumberOfIntervals; + ULONG SquareWaveState = 0; + +// mdbfix - move this into eisa.h one day +#define SB_READ_STATUS_ONLY 2 + + controlBase = HalpEisaControlBase; + + // + // Disable the speaker counter. + // + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + NmiStatus.SpeakerGate = 0; + NmiStatus.SpeakerData = 0; + + // these are MBZ when writing to NMIMISC + NmiStatus.RefreshToggle = 0; + NmiStatus.SpeakerTimer = 0; + NmiStatus.IochkNmi = 0; + + WRITE_PORT_UCHAR(&controlBase->NmiStatus, *((PUCHAR) &NmiStatus)); + + // + // Number of Square Wave transitions to count. + // at 50ms period, count the number of 25ms + // square wave transitions for a sample reference + // time to against which we measure processor cycle count. + // + + NumberOfIntervals = (SampleTime/50) * 2; + + // + // Set the timer for counter 0 in binary mode, square wave output + // + + TimerControlSetup.BcdMode = 0; + TimerControlSetup.Mode = TM_SQUARE_WAVE; + TimerControlSetup.SelectByte = SB_LSB_THEN_MSB; + TimerControlSetup.SelectCounter = SELECT_COUNTER_2; + + // + // Set the counter for a latched read of the status. + // We will poll the PIT for the state of the square + // wave output. + // + + TimerControlReadStatus.BcdMode = 0; + TimerControlReadStatus.Mode = (1 << SELECT_COUNTER_2); + TimerControlReadStatus.SelectByte = SB_READ_STATUS_ONLY; + TimerControlReadStatus.SelectCounter = SELECT_READ_BACK; + + + // + // Write the count value LSB and MSB for a 50ms clock period + // + + WRITE_PORT_UCHAR( &controlBase->CommandMode1, + *(PUCHAR)&TimerControlSetup ); + + WRITE_PORT_UCHAR( &controlBase->SpeakerTone, + TIMER_REF_VALUE & 0xff ); + + WRITE_PORT_UCHAR( &controlBase->SpeakerTone, + (TIMER_REF_VALUE >> 8) & 0xff ); + + // + // Enable the speaker counter but disable the SPKR output signal. + // + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + NmiStatus.SpeakerGate = 1; + NmiStatus.SpeakerData = 0; + + // these are MBZ when writing to NMIMISC + NmiStatus.RefreshToggle = 0; + NmiStatus.SpeakerTimer = 0; + NmiStatus.IochkNmi = 0; + + WRITE_PORT_UCHAR(&controlBase->NmiStatus, *((PUCHAR) &NmiStatus)); + + // + // Synchronize with the counter before taking the first + // sample of the Processor Cycle Count (PCC). Since we + // are using the Square Wave Mode, wait until the next + // state change and then observe half a cycle before + // sampling. + // + + // + // observe the low transition of the square wave output. + // + do { + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + } while (NmiStatus.SpeakerTimer != SquareWaveState); + + SquareWaveState ^= 1; + + // + // observe the next transition of the square wave output and then + // take the first cycle counter sample. + // + do { + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + } while (NmiStatus.SpeakerTimer != SquareWaveState); + + Count1 = __RCC(); + + // + // Wait for the 500ms time period to pass and then take the + // second sample of the PCC. For a 50ms period, we have to + // observe eight wave transitions (25ms each). + // + + do { + + SquareWaveState ^= 1; + + // + // wait for wave transition + // + do { + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + } while (NmiStatus.SpeakerTimer != SquareWaveState); + + } while (--NumberOfIntervals); + + Count2 = __RCC(); + + // + // Disable the speaker counter. + // + + *((PUCHAR) &NmiStatus) = READ_PORT_UCHAR(&controlBase->NmiStatus); + + NmiStatus.SpeakerGate = 0; + NmiStatus.SpeakerData = 0; + + WRITE_PORT_UCHAR(&controlBase->NmiStatus, *((PUCHAR) &NmiStatus)); + + // + // Calculate the Hz by the number of processor cycles + // elapsed during 1s. + // + // Hz = PCC/SampleTime * 1000ms/s + // = PCC * (1000/SampleTime) + // + + // did the counter wrap? if so add 2^32 + if (Count1 > Count2) { + + Count2 += (ULONGLONG)(1 << 32); + + } + + return ((Count2 - Count1)*(((ULONG)1000)/SampleTime)); +} + + +VOID +HalpInitializeProcessorParameters( + VOID + ) +/*++ + +Routine Description: + + This routine initalize the performance counter parameters + HalpClockFrequency and HalpClockMegaHertz based on the + estimated CPU speed. A 1s reference time is used for + the estimation. + +Arguments: + + None. + +Return Value: + + None. + +--*/ +{ + + HalpClockFrequency = HalpQuerySystemFrequency(1000); + HalpClockMegaHertz = (HalpClockFrequency + 500000)/ 1000000; + +} + +#if 0 +VOID +HalpGatherProcessorParameterStats( + VOID + ) + +/*++ + +Routine Description: + + This routine gathers statistics on the method for + estimating the system frequency. + +Arguments: + + None. + +Return Value: + + None. + +--*/ + +{ + ULONG Index; + ULONG Hertz[32]; + ULONGLONG Mean = 0; + ULONGLONG Variance = 0; + ULONGLONG TempHertz; + + // + // take 32 samples of estimated CPU speed, + // calculating the mean in the process. + // + DbgPrint("Sample\tFrequency\tMegaHertz\n\n"); + + for (Index = 0; Index < 32; Index++) { + Hertz[Index] = HalpQuerySystemFrequency(500); + Mean += Hertz[Index]; + + DbgPrint( + "%d\t%d\t%d\n", + Index, + Hertz[Index], + (ULONG)((Hertz[Index] + 500000)/1000000) + ); + + } + + // + // calculate the mean + // + + Mean /= 32; + + // + // calculate the variance + // + for (Index = 0; Index < 32; Index++) { + TempHertz = (Mean > Hertz[Index])? + (Mean - Hertz[Index]) : (Hertz[Index] - Mean); + TempHertz = TempHertz*TempHertz; + Variance += TempHertz; + } + + Variance /= 32; + + DbgPrint("\nResults\n\n"); + DbgPrint( + "Mean = %d\nVariance = %d\nMegaHertz (derived) = %d\n", + Mean, + Variance, + (Mean + 500000)/ 1000000 + ); + +} +#endif + |