mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
3.1 KiB
152 lines
3.1 KiB
/*++
|
|
|
|
Copyright (c) 2000 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
pmstall.c
|
|
|
|
Abstract:
|
|
|
|
This module implements the code necessary to implement the
|
|
Halp...StallExecution() routines for the ACPI HAL.
|
|
|
|
Author:
|
|
|
|
Shie-Lin Tzong (shielint) 12-Jan-1990
|
|
|
|
Environment:
|
|
|
|
Kernel mode only.
|
|
|
|
Revision History:
|
|
|
|
bryanwi 20-Sep-90
|
|
|
|
Add KiSetProfileInterval, KiStartProfileInterrupt,
|
|
KiStopProfileInterrupt procedures.
|
|
KiProfileInterrupt ISR.
|
|
KiProfileList, KiProfileLock are delcared here.
|
|
|
|
shielint 10-Dec-90
|
|
Add performance counter support.
|
|
Move system clock to irq8, ie we now use RTC to generate system
|
|
clock. Performance count and Profile use timer 1 counter 0.
|
|
The interval of the irq0 interrupt can be changed by
|
|
KiSetProfileInterval. Performance counter does not care about the
|
|
interval of the interrupt as long as it knows the rollover count.
|
|
Note: Currently I implemented 1 performance counter for the whole
|
|
i386 NT.
|
|
|
|
John Vert (jvert) 11-Jul-1991
|
|
Moved from ke\i386 to hal\i386. Removed non-HAL stuff
|
|
|
|
shie-lin tzong (shielint) 13-March-92
|
|
Move System clock back to irq0 and use RTC (irq8) to generate
|
|
profile interrupt. Performance counter and system clock use time1
|
|
counter 0 of 8254.
|
|
|
|
Landy Wang (corollary!landy) 04-Dec-92
|
|
Created this module by moving routines from ixclock.asm to here.
|
|
|
|
Forrest Foltz (forrestf) 24-Oct-2000
|
|
Ported from pmstall.asm to pmstall.c
|
|
|
|
--*/
|
|
|
|
#include "halcmn.h"
|
|
|
|
ULONG64 HalpStallLoopsPerTick = 3;
|
|
|
|
LARGE_INTEGER
|
|
(*QueryTimer)(VOID);
|
|
|
|
|
|
VOID
|
|
HalpInitializeStallExecution (
|
|
IN CCHAR ProcessorNumber
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine is obsolete in this HAL.
|
|
|
|
Arguments:
|
|
|
|
ProcessorNumber - Processor Number
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
VOID
|
|
HalpAcpiTimerStallExecProc(
|
|
IN ULONG MicroSeconds
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function stalls execution for the specified number of microseconds.
|
|
KeStallExecutionProcessor
|
|
|
|
Arguments:
|
|
|
|
MicroSeconds - Supplies the number of microseconds that execution is to be
|
|
stalled.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
ULONG stallTicks;
|
|
ULONG64 currentTime;
|
|
ULONG64 targetTime;
|
|
|
|
PROCESSOR_FENCE;
|
|
|
|
if (MicroSeconds == 0) {
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Target is in microseconds, or 1MHz. Convert to PM_TMR_FREQ,
|
|
// which is a colorburst crystal (3,579,545 Hz).
|
|
//
|
|
|
|
stallTicks = (ULONG)(((ULONG64)MicroSeconds * PM_TMR_FREQ) / 1000000);
|
|
|
|
//
|
|
// Determine the target time and loop until it is reached.
|
|
//
|
|
// ******fixfix
|
|
//
|
|
// The code in pmstall.asm has an inner loop that does not call
|
|
// QueryTimer(), presumably to minimize calls to that routine.
|
|
// Investigate further.
|
|
//
|
|
// ******fixfix
|
|
//
|
|
|
|
currentTime = QueryTimer().QuadPart;
|
|
targetTime = currentTime + stallTicks;
|
|
|
|
while (currentTime < targetTime) {
|
|
currentTime = QueryTimer().QuadPart;
|
|
}
|
|
}
|
|
|
|
|