mirror of https://gerrit.osmocom.org/gapk
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/*
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* Copyright (c) 2005 Mellanox Technologies Ltd.,
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* (c) 2005 Harald Welte <laforge@gnumonks.org>, All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id$
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*/
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#pragma once
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#if 0
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#define _POSIX_C_SOURCE 199506L
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#include <unistd.h>
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#include <time.h>
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/* Ideally we would be using clock_getres() and clock_gettime().
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* glibc manpage says CLOCK_PROCESS_CPUTIME_ID is only defined if it is
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* actually present. however, on ppc64 it is defined but not implemented. */
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#ifdef CLOCK_PROCESS_CPUTIME_ID
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typedef long cycles_t;
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static inline cycles_t get_cycles()
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{
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struct timespec ts;
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#if defined (__x86_64__) || defined(__i386__)
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asm volatile ("cpuid" : : : "eax", "ebx", "ecx", "edx" ); /* flush pipeline */
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#endif
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
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return ts.tv_nsec;
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}
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#endif
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#endif
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#if defined (__x86_64__) || defined(__i386__)
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/* Note: only x86 CPUs which have rdtsc instruction are supported. */
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typedef unsigned long long cycles_t;
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static inline cycles_t get_cycles()
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{
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unsigned low, high;
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unsigned long long val;
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asm volatile ("cpuid" : : : "eax", "ebx", "ecx", "edx" ); /* flush pipeline */
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asm volatile ("rdtsc" : "=a" (low), "=d" (high));
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val = high;
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val = (val << 32) | low;
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return val;
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}
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#elif defined(__PPC64__)
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/* Note: only PPC CPUs which have mftb instruction are supported. */
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typedef unsigned long long cycles_t;
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static inline cycles_t get_cycles()
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{
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cycles_t ret;
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asm volatile ("mftb %0" : "=r" (ret) : );
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return ret;
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}
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#elif defined(__sparc__)
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/* Note: only sparc64 supports this register */
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typedef unsigned long long cycles_t;
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#define TICK_PRIV_BIT (1ULL << 63)
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static inline cycles_t get_cycles()
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{
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cycles_t ret;
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#if defined(__sparcv9) || defined(__arch64__)
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asm volatile ("rd %%tick, %0" : "=r" (ret));
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#else
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asm volatile ("rd %%tick, %%g1\n\t"
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"srlx %%g1, 32, %H0\n\t"
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"srl %%g1, 0, %L0"
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: "=r" (ret)
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: /* no inputs */
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: "g1");
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#endif
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return ret & ~TICK_PRIV_BIT;
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}
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#elif defined(__PPC__)
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#define CPU_FTR_601 0x00000100
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typedef unsigned long cycles_t;
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static inline cycles_t get_cycles()
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{
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cycles_t ret;
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asm volatile (
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"98: mftb %0\n"
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"99:\n"
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".section __ftr_fixup,\"a\"\n"
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" .long %1\n"
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" .long 0\n"
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" .long 98b\n"
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" .long 99b\n"
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".previous"
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: "=r" (ret) : "i" (CPU_FTR_601));
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return ret;
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}
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#elif defined(__ia64__) || defined(__mips__) || \
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defined(__s390__)
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/* Itanium2 and up has ar.itc (Itanium1 has errata) */
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/* PPC64 has mftb */
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#include <asm/timex.h>
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#else
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#warning get_cycles not implemented for this architecture: attempt asm/timex.h
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#include <asm/timex.h>
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#endif
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extern double get_cpu_mhz(void);
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