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.
461 lines
11 KiB
461 lines
11 KiB
|
|
title "ACPI Timer Functions"
|
|
;++
|
|
;
|
|
; Copyright (c) 1989 Microsoft Corporation
|
|
;
|
|
; Module Name:
|
|
;
|
|
; pmtimer.asm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; This module implements the code for ACPI-related timer
|
|
; functions.
|
|
;
|
|
; Author:
|
|
;
|
|
; Jake Oshins (jakeo) March 28, 1997
|
|
;
|
|
; Environment:
|
|
;
|
|
; Kernel mode only.
|
|
;
|
|
; Revision History:
|
|
;
|
|
; Split from pmclock.asm due to PIIX4 bugs.
|
|
;
|
|
;--
|
|
|
|
.386p
|
|
.xlist
|
|
include hal386.inc
|
|
include callconv.inc ; calling convention macros
|
|
include mac386.inc
|
|
include i386\ix8259.inc
|
|
include i386\ixcmos.inc
|
|
include xxacpi.h
|
|
|
|
.list
|
|
|
|
extrn _HalpFixedAcpiDescTable:DWORD
|
|
extrn _HalpPiix4:byte
|
|
extrn _HalpNextMSRate:DWORD
|
|
extrn _PMTimerFreq:DWORD
|
|
if DBG
|
|
extrn _LastKQPCValue:DWORD
|
|
endif
|
|
|
|
;
|
|
; ==== Values used for ACPI Clock ====
|
|
;
|
|
|
|
|
|
_DATA SEGMENT DWORD PUBLIC 'DATA'
|
|
|
|
MSBMASK24 equ 00800000h
|
|
MSBMASK32 equ 80000000h
|
|
|
|
CurrentTimePort equ 0
|
|
TimeLow equ 4
|
|
TimeHigh2 equ 8
|
|
TimeHigh1 equ 12
|
|
MsbMask equ 16
|
|
BiasLow equ 20
|
|
BiasHigh equ 24
|
|
UpperBoundLow equ 28
|
|
UpperBoundHigh2 equ 32
|
|
UpperBoundHigh1 equ 36
|
|
|
|
public _TimerInfo
|
|
_TimerInfo dd 0,0,0,0,MSBMASK24,0,0,0,2,2
|
|
|
|
public _QueryTimer
|
|
_QueryTimer dd offset FLAT:@HalpQueryPerformanceCounter
|
|
|
|
if 0
|
|
;
|
|
; The UpperBoundTable contains the values which should be added
|
|
; to the current counter value to ensure that the upper bound is
|
|
; reasonable. Values listed here are for all the 15 possible
|
|
; timer tick lengths. The unit is "PM Timer Ticks" and the
|
|
; value corresponds to the number of ticks that will pass in
|
|
; roughly two timer ticks at this rate.
|
|
;
|
|
UpperBoundTable dd 14000 ; 1 ms
|
|
dd 28600 ; 2 ms
|
|
dd 43200 ; 3 ms
|
|
dd 57200 ; 4 ms
|
|
dd 71600 ; 5 ms
|
|
dd 86000 ; 6 ms
|
|
dd 100200 ; 7 ms
|
|
dd 114600 ; 8 ms
|
|
dd 128800 ; 9 ms
|
|
dd 143400 ; 10 ms
|
|
dd 157400 ; 11 ms
|
|
dd 171800 ; 12 ms
|
|
dd 186200 ; 13 ms
|
|
dd 200400 ; 14 ms
|
|
dd 214800 ; 15 ms
|
|
endif
|
|
|
|
if DBG
|
|
TicksPassed dd 0,0
|
|
|
|
public _TimerPerf, _TimerPerfIndex
|
|
_TimerPerf db 4096 dup(0)
|
|
|
|
RawRead0 equ 0
|
|
RawRead1 equ 4
|
|
AdjustedLow0 equ 8
|
|
AdjustedHigh0 equ 12
|
|
AdjustedLow1 equ 16
|
|
AdjustedHigh1 equ 20
|
|
TITL equ 24
|
|
TITH equ 28
|
|
UBL equ 32
|
|
UBH equ 36
|
|
ReturnedLow equ 40
|
|
ReturnedHigh equ 44
|
|
ReadCount equ 48
|
|
TickMin equ 52
|
|
TickCount equ 56
|
|
TickNewUB equ 60
|
|
TimerPerfBytes equ 64
|
|
|
|
_TimerPerfIndex dd 0
|
|
|
|
endif
|
|
|
|
_DATA ends
|
|
|
|
_TEXT$03 SEGMENT DWORD PUBLIC 'CODE'
|
|
ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
|
|
|
|
page ,132
|
|
subttl "Query Performance Counter"
|
|
;++
|
|
;
|
|
; VOID
|
|
; HalCalibratePerformanceCounter (
|
|
; IN LONG volatile *Number,
|
|
; IN ULONGLONG NewCount
|
|
; )
|
|
;
|
|
; /*++
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This routine resets the performance counter value for the current
|
|
; processor to zero. The reset is done such that the resulting value
|
|
; is closely synchronized with other processors in the configuration.
|
|
;
|
|
; Arguments:
|
|
;
|
|
; Number - Supplies a pointer to count of the number of processors in
|
|
; the configuration.
|
|
;
|
|
; NewCount - Supplies the value to synchronize the counter too
|
|
;
|
|
; Return Value:
|
|
;
|
|
; None.
|
|
;--
|
|
cPublicProc _HalpPmTimerCalibratePerfCount, 3
|
|
cPublicFpo 3,1
|
|
push edi
|
|
mov edi, [esp+8] ; ponter to context
|
|
|
|
cmp byte ptr PCR[PcNumber], 0 ; only execute on one processor
|
|
jnz short hcp_50 ; if not boot processor, wait
|
|
|
|
mov eax, _QueryTimer ; move current counter into edx:eax
|
|
call eax
|
|
|
|
mov ecx, [esp+12] ; compute how far current count
|
|
sub ecx, eax ; is from target count
|
|
mov eax, [esp+16]
|
|
sbb eax, edx
|
|
|
|
mov _TimerInfo.BiasLow, ecx ; replace bias
|
|
mov _TimerInfo.BiasHigh, eax
|
|
|
|
hcp_50:
|
|
lock dec dword ptr [edi] ; count down
|
|
|
|
@@: YIELD
|
|
cmp dword ptr [edi], 0 ; wait for all processors to signal
|
|
jnz short @b
|
|
|
|
pop edi
|
|
stdRET _HalpPmTimerCalibratePerfCount
|
|
|
|
stdENDP _HalpPmTimerCalibratePerfCount
|
|
|
|
page ,132
|
|
subttl "Query Performance Counter"
|
|
;++
|
|
;
|
|
; LARGE_INTEGER
|
|
; FASTCALL
|
|
; HalpQueryPerformanceCounter(
|
|
; VOID
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This function is a simplified form of HalpAcpiTimerQueryPerfCount
|
|
; meant to be used internally by the HAL.
|
|
;
|
|
cPublicFastCall HalpQueryPerformanceCounter,0
|
|
cPublicFpo 0, 2
|
|
|
|
push ebx
|
|
push esi
|
|
|
|
;
|
|
; Snap current times
|
|
;
|
|
|
|
kqpc10: YIELD
|
|
mov esi, _TimerInfo.TimeHigh2
|
|
mov ebx, _TimerInfo.TimeLow
|
|
|
|
cmp esi, _TimerInfo.TimeHigh1
|
|
jne short kqpc10 ; Loop until consistent copy read
|
|
|
|
mov edx, _TimerInfo.CurrentTimePort
|
|
in eax, dx
|
|
|
|
;
|
|
; See if h/w MSb matches s/w copy
|
|
;
|
|
|
|
mov ecx, _TimerInfo.MsbMask
|
|
mov edx, eax
|
|
xor edx, ebx
|
|
and edx, ecx ; Isolate MSb match or mismatch
|
|
|
|
;
|
|
; Strip high hardware bit
|
|
;
|
|
|
|
not ecx
|
|
and eax, ecx
|
|
not ecx
|
|
|
|
;
|
|
; merge low bits
|
|
;
|
|
|
|
dec ecx
|
|
not ecx
|
|
and ebx, ecx
|
|
or eax, ebx
|
|
|
|
;
|
|
; If there was a mismatch, add a tick
|
|
;
|
|
|
|
add eax, edx
|
|
adc esi, 0
|
|
|
|
mov edx, esi ; get the top-half of the return value
|
|
|
|
pop esi
|
|
pop ebx
|
|
fstRET HalpQueryPerformanceCounter
|
|
fstENDP HalpQueryPerformanceCounter
|
|
|
|
|
|
;++
|
|
;
|
|
; LARGE_INTEGER
|
|
; HalpPmTimerQueryPerfCount (
|
|
; OUT PLARGE_INTEGER PerformanceFrequency OPTIONAL
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This routine returns current 64-bit performance counter and,
|
|
; optionally, the Performance Frequency.
|
|
;
|
|
; N.B. The performace counter returned by this routine is
|
|
; not necessary the value when this routine is just entered.
|
|
; The value returned is actually the counter value at any point
|
|
; between the routine is entered and is exited.
|
|
;
|
|
; Arguments:
|
|
;
|
|
; PerformanceFrequency [TOS+4] - optionally, supplies the address
|
|
; of a variable to receive the performance counter frequency.
|
|
;
|
|
; Return Value:
|
|
;
|
|
; Current value of the performance counter will be returned.
|
|
;
|
|
;--
|
|
|
|
KqpcFrequency EQU [esp+8] ; User supplied Performance Frequence
|
|
|
|
cPublicProc _HalpPmTimerQueryPerfCount, 1
|
|
.FPO (0, 1, 0, 1, 0, 0)
|
|
|
|
push esi
|
|
|
|
mov eax, _QueryTimer
|
|
call eax
|
|
|
|
if 0
|
|
;
|
|
; Check to see if the timer ever reports time moving backwards
|
|
;
|
|
@@:
|
|
mov esi, [_LastKQPCValue+8]
|
|
mov ecx, [_LastKQPCValue]
|
|
cmp esi, [_LastKQPCValue+4]
|
|
jne short @b
|
|
|
|
cmp edx, esi ; check for rollover
|
|
jl short @f
|
|
|
|
sub ecx, eax
|
|
sbb esi, edx
|
|
jng short @f
|
|
int 3
|
|
@@:
|
|
mov [_LastKQPCValue+4], edx
|
|
mov [_LastKQPCValue], eax
|
|
mov [_LastKQPCValue+8], edx
|
|
endif
|
|
|
|
;
|
|
; Apply bias to time
|
|
;
|
|
|
|
mov ecx, _TimerInfo.BiasLow
|
|
mov esi, _TimerInfo.BiasHigh
|
|
add eax, ecx
|
|
adc edx, esi
|
|
|
|
mov ecx, KqpcFrequency
|
|
or ecx, ecx
|
|
jnz short kqpc20
|
|
|
|
pop esi
|
|
|
|
stdRET _HalpPmTimerQueryPerfCount
|
|
|
|
kqpc20: mov esi, _PMTimerFreq
|
|
mov [ecx], esi ; Hertz of PM timer
|
|
mov [ecx+4], 0
|
|
pop esi
|
|
stdRET _HalpPmTimerQueryPerfCount
|
|
|
|
stdENDP _HalpPmTimerQueryPerfCount
|
|
|
|
;++
|
|
;
|
|
; VOID
|
|
; HalAcpiTimerCarry (
|
|
; VOID
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This routine is called to service the PM timer carry interrupt
|
|
;
|
|
; N.B. This function is called at interrupt time and assumes the
|
|
; caller clears the interrupt
|
|
;
|
|
; Arguments:
|
|
;
|
|
; None
|
|
;
|
|
; Return Value:
|
|
;
|
|
; None
|
|
;
|
|
;--
|
|
|
|
|
|
cPublicProc _HalAcpiTimerCarry, 0
|
|
cPublicFpo 0, 1
|
|
|
|
push ebx
|
|
|
|
;
|
|
; Get current time from h/w
|
|
;
|
|
|
|
mov edx, _TimerInfo.CurrentTimePort
|
|
in eax, dx
|
|
mov ebx, eax
|
|
|
|
mov ecx, _TimerInfo.MsbMask
|
|
mov eax, _TimerInfo.TimeLow
|
|
mov edx, _TimerInfo.TimeHigh2
|
|
|
|
;
|
|
; Add one tick
|
|
;
|
|
|
|
add eax, ecx
|
|
adc edx, 0
|
|
|
|
;
|
|
; MSb of h/w should now match s/w. If not, add another tick
|
|
; to get them back in sync. (debugger might knock them
|
|
; out of sync)
|
|
;
|
|
|
|
xor ebx, eax
|
|
and ebx, ecx
|
|
add eax, ebx
|
|
adc edx, 0
|
|
|
|
;
|
|
; Store in reverse order of code which reads it
|
|
;
|
|
|
|
mov _TimerInfo.TimeHigh1, edx
|
|
mov _TimerInfo.TimeLow, eax
|
|
mov _TimerInfo.TimeHigh2, edx
|
|
|
|
pop ebx
|
|
stdRET _HalAcpiTimerCarry
|
|
stdENDP _HalAcpiTimerCarry
|
|
|
|
;++
|
|
;
|
|
; VOID
|
|
; HalAcpiBrokenPiix4TimerCarry (
|
|
; VOID
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This routine does nothing. When we are using the Broken Piix4
|
|
; Code (TM), we are guaranteed to have examined the timer many times
|
|
; since the last rollover. So we don't need to do any bookkeeping
|
|
; here.
|
|
;
|
|
; N.B. This function is called at interrupt time and assumes the
|
|
; caller clears the interrupt
|
|
;
|
|
; Arguments:
|
|
;
|
|
; None
|
|
;
|
|
; Return Value:
|
|
;
|
|
; None
|
|
;
|
|
;--
|
|
cPublicProc _HalAcpiBrokenPiix4TimerCarry, 0
|
|
stdRET _HalAcpiBrokenPiix4TimerCarry
|
|
stdENDP _HalAcpiBrokenPiix4TimerCarry
|
|
|
|
_TEXT$03 ends
|
|
|
|
end
|