[tkreuzer] 44795: Remove the totally broken asm implementation of KeQueryPerformanceCounter and replace it with a much simpler C version using __rdtsc().

Author: tkreuzer
Date: Mon Dec 28 18:53:26 2009
New Revision: 44795

URL: http://svn.reactos.org/svn/reactos?rev=44795&view=rev
Log:
Remove the totally broken asm implementation of KeQueryPerformanceCounter and replace it
with a much simpler C version using __rdtsc().

Modified:
    branches/ros-amd64-bringup/reactos/hal/halamd64/generic/misc.c
    branches/ros-amd64-bringup/reactos/hal/halamd64/generic/systimer.S

Modified: branches/ros-amd64-bringup/reactos/hal/halamd64/generic/misc.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/hal/h…
==============================================================================
--- branches/ros-amd64-bringup/reactos/hal/halamd64/generic/misc.c [iso-8859-1]
(original)
+++ branches/ros-amd64-bringup/reactos/hal/halamd64/generic/misc.c [iso-8859-1] Mon Dec 28
18:53:26 2009
@@ -5,6 +5,7 @@
  * PURPOSE:         Miscellanous Routines
  * PROGRAMMERS:     Alex Ionescu (alex.ionescu(a)reactos.org)
  *                  Eric Kohl (ekohl(a)abo.rhein-zeitung.de)
+ *                  Timo Kreuzer (timo.kreuzer(a)reactos.org)
  */
 
 /* INCLUDES ******************************************************************/
@@ -12,6 +13,8 @@
 #include <hal.h>
 #define NDEBUG
 #include <debug.h>
+
+LARGE_INTEGER HalpPerformanceFrequency;
 
 /* PRIVATE FUNCTIONS *********************************************************/
 
@@ -103,3 +106,23 @@
     /* Not implemented on x86 */
     return;
 }
+
+LARGE_INTEGER
+NTAPI
+KeQueryPerformanceCounter(
+    OUT PLARGE_INTEGER PerformanceFrequency OPTIONAL)
+{
+    LARGE_INTEGER Result;
+
+    ASSERT(HalpPerformanceFrequency.QuadPart != 0);
+
+    /* Does the caller want the frequency? */
+    if (PerformanceFrequency)
+    {
+        /* Return value */
+        *PerformanceFrequency = HalpPerformanceFrequency;
+    }
+
+    Result.QuadPart = __rdtsc();
+    return Result;
+}

Modified: branches/ros-amd64-bringup/reactos/hal/halamd64/generic/systimer.S
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/hal/h…
==============================================================================
--- branches/ros-amd64-bringup/reactos/hal/halamd64/generic/systimer.S [iso-8859-1]
(original)
+++ branches/ros-amd64-bringup/reactos/hal/halamd64/generic/systimer.S [iso-8859-1] Mon
Dec 28 18:53:26 2009
@@ -8,21 +8,24 @@
 /* INCLUDES ******************************************************************/
 
 #include <asm.h>
-#include <internal/i386/asmmacro.S>
-.intel_syntax noprefix
+#include <ndk/amd64/asmmacro.S>
 
 /* GLOBALS *******************************************************************/
 
-_HalpLastPerfCounterLow:    .long 0
-_HalpLastPerfCounterHigh:   .long 0
-_HalpPerfCounterLow:        .long 0
-_HalpPerfCounterHigh:       .long 0
-_HalpSystemHardwareFlags:   .long 0
+.data
 
 _UnhandledMsg:
     .asciz "\n\x7\x7!!! Unhandled or Unexpected Code at line: %lx!!!\n"
 
+.global _MsgUnimplemented
+_MsgUnimplemented:
+.asciz "WARNING:  %s at %s:%d is UNIMPLEMENTED!\n"
+
+
 /* FUNCTIONS *****************************************************************/
+
+.text
+.code64
 
 .global _HalpReleaseCmosSpinLock
 .func HalpReleaseCmosSpinLock
@@ -106,207 +109,10 @@
     ret
 .endfunc
 
-
-.global _KeQueryPerformanceCounter
-.func KeQueryPerformanceCounter
-_KeQueryPerformanceCounter:
-
-    /* Check if we were called too early */
-    cmp dword ptr _HalpCurrentRollOver, 0
-    je NoCount
-
-    /* Save volatiles */
-    push rbx
-    push rsi
-
-LoopPreInt:
-
-    /* Disable interrupts */
-    pushf
-    cli
-
-LoopPostInt:
-
-    /* Get the current value */
-    mov ebx, _HalpPerfCounterLow
-    mov esi, _HalpPerfCounterHigh
-
-    /* Read 8254 timer */
-    mov al, 0
-    out 0x43, al
-    jmp $+2
-    in al, 0x40
-    jmp $+2
-    movzx ecx, al
-    in al, 0x40
-    mov ch, al
-
-    /* Enable interrupts and do a short wait */
-    popf
-    nop
-    jmp $+2
-
-    /* Disable them again */
-    pushf
-    cli
-
-    /* Get the counter value again */
-    mov eax, _HalpPerfCounterLow
-    mov edx, _HalpPerfCounterHigh
-
-    /* Check if someone updated the counter */
-    cmp eax, ebx
-    jnz LoopPostInt
-    cmp edx, esi
-    jnz LoopPostInt
-
-    /* Check if the current 8254 value causes rollover */
-    neg ecx
-    add ecx, _HalpCurrentRollOver
-    jnb DoRollOver
-
-SetSum:
-
-    /* Calculate the sum */
-    add eax, ecx
-    adc edx, 0
-
-    /* Check if we're above or below the last high value */
-    cmp edx, _HalpLastPerfCounterHigh
-    jb short BelowHigh
-    jnz short BelowLow
-
-    /* Check if we're above or below the last low value */
-    cmp eax, _HalpLastPerfCounterLow
-    jb BelowHigh
-
-BelowLow:
-
-    /* Update the last value and bring back interrupts */
-    mov _HalpLastPerfCounterLow, eax
-    mov _HalpLastPerfCounterHigh, edx
-    popf
-
-    /* Check if caller wants frequency */
-    cmp dword ptr [esp+12], 0
-    jz ReturnNoFreq
-
-    /* Save hard-coded frequency */
-    mov ecx, dword ptr [esp+12]
-    mov dword ptr [ecx], 1193182
-    mov dword ptr [ecx+4], 0
-
-ReturnNoFreq:
-
-    /* Restore volatiles */
-    pop rsi
-    pop rbx
-    ret 4
-
-NoCount:
-
-    /* Return empty, called too soon */
-    mov eax, 0
-    mov edx, 0
-    ret 4
-
-DoRollOver:
-
-    /* We might have an incoming interrupt, save EFLAGS and reset rollover */
-    mov esi, [esp]
-    mov ecx, _HalpCurrentRollOver
-    popf
-
-    /* Check if interrupts were enabled and try again */
-    test esi, EFLAGS_INTERRUPT_MASK
-    jnz LoopPreInt
-
-    /* They're not, continue where we left */
-    pushf
-    jmp SetSum
-
-BelowHigh:
-
-    /* Get the last counter values */
-    mov ebx, _HalpLastPerfCounterLow
-    mov esi, _HalpLastPerfCounterHigh
-
-    /* Check if the previous value was 0 and go back if yes */
-    mov ecx, ebx
-    or ecx, esi
-    jz BelowLow
-
-    /* Make sure that the count is still valid */
-    sub ebx, eax
-    sbb esi, edx
-    jnz InvalidCount
-    cmp ebx, _HalpCurrentRollOver
-    jg InvalidCount
-
-    /* Fixup the count with the last known value */
-    sub eax, ebx
-    sbb edx, esi
-
-    /* We might have an incoming interrupt, save EFLAGS */
-    mov ecx, [esp]
-    popf
-
-    /* Check if interrupts were enabled and try again */
-    test ecx, EFLAGS_INTERRUPT_MASK
-    jnz LoopPreInt
-
-    /* They're not, continue where we left */
-    pushf
-    jmp BelowLow
-
-InvalidCount:
-    popf
-    xor eax, eax
-    mov _HalpLastPerfCounterLow, eax
-    mov _HalpLastPerfCounterHigh, eax
-    jmp LoopPreInt
+.globl _HalpClockInterrupt
+.func HalpClockInterrupt
+_HalpClockInterrupt:
+    UNIMPLEMENTED _HalpClockInterrupt
+    iret
 .endfunc
 
-.globl _HalpClockInterrupt
-.func HalpClockInterrupt
-//TRAP_FIXUPS hci_a, hci_t, DoFixupV86, DoFixupAbios
-_HalpClockInterrupt:
-
-    /* Enter trap */
-//    INT_PROLOG hci_a, hci_t, DoPushFakeErrorCode
-
-    /* Push vector and make stack for IRQL */
-    push 0x30
-    sub esp, 4
-
-    /* Begin the interrupt */
-    push rsp
-    push 0x30
-    push CLOCK_LEVEL
-//    call _HalBeginSystemInterrupt
-
-    /* Check if it's spurious */
-    or al, al
-    jz Spurious
-
-    /* Update the performance counter */
-    xor ebx, ebx
-    mov eax, _HalpCurrentRollOver
-    add _HalpPerfCounterLow, eax
-    adc _HalpPerfCounterHigh, ebx
-
-    /* Get the time increment and check if someone changed the clock rate */
-    mov eax, _HalpCurrentTimeIncrement
-    cmp _HalpClockSetMSRate, ebx
-    jz _KeUpdateSystemTime
-
-    /* FIXME: Someone did! */
-    int 3
-
-Spurious:
-
-    /* Exit the interrupt */
-    add esp, 8
-//    jmp _Kei386EoiHelper
-.endfunc
-