kernel/hal/timestamp.asm

   1
   2         [BITS 32]
   3
   4 GLOBAL HalReadTimestampCounter
   5 EXTERN g_ullTimeStampCounter
   6
   7 [SECTION .text]
   8 ;;;
   9 ;;; ULONGLONG
  10 ;;; HalReadTimestampCounter(void)
  11 ;;;
  12 ;;; Function to read the processor's timestamp counter
  13 ;;;
  14 HalReadTimestampCounter:
  15         ALIGN 4
  16         rdtsc
  17         mov [g_ullTimeStampCounter], edx
  18         mov [g_ullTimeStampCounter+4], eax
  19         ret