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107 lines
1.8 KiB
ArmAsm
107 lines
1.8 KiB
ArmAsm
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#include <asm.inc>
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#include "tsc.h"
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.code
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#ifdef _M_IX86
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EXTERN _TscCalibrationPhase:BYTE
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EXTERN _TscCalibrationArray:QWORD
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EXTERN _HalpSendEOI@0:PROC
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PUBLIC _TscCalibrationISR
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_TscCalibrationISR:
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push eax
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push ecx
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push edx
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/* The first thing we do is read the current TSC value */
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rdtsc
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/* Read the current phase */
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movzx ecx, byte ptr ds:[_TscCalibrationPhase]
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/* Check if we're already done */
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cmp cl, NUM_SAMPLES
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jnb _CalibrationISR_Exit
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/* Store the current value */
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shl ecx, 3
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mov dword ptr _TscCalibrationArray[ecx], eax
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mov dword ptr _TscCalibrationArray[ecx + 4], edx
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/* Advance phase */
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inc byte ptr ds:[_TscCalibrationPhase]
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_CalibrationISR_Exit:
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/* Read CMOS register C */
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mov al, HEX(0C)
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out HEX(70), al
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jmp $+2
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in al, HEX(71)
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jmp $+2
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/* Send EOI */
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call _HalpSendEOI@0
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pop edx
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pop ecx
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pop eax
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iretd
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#else
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EXTERN TscCalibrationPhase:BYTE
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EXTERN TscCalibrationArray:DWORD
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EXTERN HalpSendEOI:PROC
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PUBLIC TscCalibrationISR
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FUNC TscCalibrationISR
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push rax
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push rbx
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push rcx
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push rdx
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.ENDPROLOG
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/* The first thing we do is read the current TSC value */
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rdtsc
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/* Read the current phase */
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movzx rcx, byte ptr [TscCalibrationPhase]
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/* Check if we're already done */
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cmp cl, NUM_SAMPLES
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jnb CalibrationISR_Exit
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/* Store the current value */
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shl rcx, 3
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lea rbx, [TscCalibrationArray]
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mov dword ptr [rbx + rcx], eax
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mov dword ptr [rbx + rcx + 4], edx
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/* Advance phase */
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inc byte ptr [TscCalibrationPhase]
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CalibrationISR_Exit:
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/* Read CMOS register C */
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mov al, HEX(0C)
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out HEX(70), al
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jmp $+2
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in al, HEX(71)
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jmp $+2
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/* Send EOI */
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call HalpSendEOI
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pop rdx
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pop rcx
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pop rbx
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pop rax
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iretq
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ENDFUNC
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#endif
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END
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