LXR linux/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 */
  16typedef unsigned long long cycles_t;
  17
  18static 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 */
  31