arch/c6x/include/asm/timex.h

   1 /*
   2  *  Port on Texas Instruments TMS320C6x architecture
   3  *
   4  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
   5  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   6  *
   7  *  Modified for 2.6.34: Mark Salter <msalter@redhat.com>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation.
  12  */
  13 #ifndef _ASM_C6X_TIMEX_H
  14 #define _ASM_C6X_TIMEX_H
  15
  16 #define CLOCK_TICK_RATE ((1000 * 1000000UL) / 6)
  17
  18 /* 64-bit timestamp */
  19 typedef unsigned long long cycles_t;
  20
  21 static inline cycles_t get_cycles(void)
  22 {
  23         unsigned l, h;
  24
  25         asm volatile (" dint\n"
  26                       " mvc .s2 TSCL,%0\n"
  27                       " mvc .s2 TSCH,%1\n"
  28                       " rint\n"
  29                       : "=b"(l), "=b"(h));
  30         return ((cycles_t)h << 32) | l;
  31 }
  32
  33 #endif /* _ASM_C6X_TIMEX_H */