arch/c6x/include/asm/timex.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Port on Texas Instruments TMS320C6x architecture
   4  *
   5  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
   6  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   7  *
   8  *  Modified for 2.6.34: Mark Salter <msalter@redhat.com>
   9  */
  10 #ifndef _ASM_C6X_TIMEX_H
  11 #define _ASM_C6X_TIMEX_H
  12
  13 #define CLOCK_TICK_RATE ((1000 * 1000000UL) / 6)
  14
  15 /* 64-bit timestamp */
  16 typedef unsigned long long cycles_t;
  17
  18 static inline cycles_t get_cycles(void)
  19 {
  20         unsigned l, h;
  21
  22         asm volatile (" dint\n"
  23                       " mvc .s2 TSCL,%0\n"
  24                       " mvc .s2 TSCH,%1\n"
  25                       " rint\n"
  26                       : "=b"(l), "=b"(h));
  27         return ((cycles_t)h << 32) | l;
  28 }
  29
  30 #endif /* _ASM_C6X_TIMEX_H */