mirror of https://github.com/F-Stack/f-stack.git
153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <cpuid.h>
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#include <rte_common.h>
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#include "eal_private.h"
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static unsigned int
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rte_cpu_get_model(uint32_t fam_mod_step)
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{
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uint32_t family, model, ext_model;
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family = (fam_mod_step >> 8) & 0xf;
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model = (fam_mod_step >> 4) & 0xf;
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if (family == 6 || family == 15) {
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ext_model = (fam_mod_step >> 16) & 0xf;
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model += (ext_model << 4);
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}
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return model;
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}
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static int32_t
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rdmsr(int msr, uint64_t *val)
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{
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#ifdef RTE_EXEC_ENV_LINUXAPP
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int fd;
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int ret;
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fd = open("/dev/cpu/0/msr", O_RDONLY);
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if (fd < 0)
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return fd;
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ret = pread(fd, val, sizeof(uint64_t), msr);
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close(fd);
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return ret;
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#else
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RTE_SET_USED(msr);
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RTE_SET_USED(val);
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return -1;
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#endif
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}
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static uint32_t
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check_model_wsm_nhm(uint8_t model)
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{
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switch (model) {
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/* Westmere */
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case 0x25:
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case 0x2C:
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case 0x2F:
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/* Nehalem */
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case 0x1E:
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case 0x1F:
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case 0x1A:
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case 0x2E:
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return 1;
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}
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return 0;
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}
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static uint32_t
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check_model_gdm_dnv(uint8_t model)
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{
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switch (model) {
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/* Goldmont */
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case 0x5C:
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/* Denverton */
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case 0x5F:
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return 1;
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}
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return 0;
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}
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uint64_t
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get_tsc_freq_arch(void)
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{
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uint64_t tsc_hz = 0;
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uint32_t a, b, c, d, maxleaf;
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uint8_t mult, model;
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int32_t ret;
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/*
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* Time Stamp Counter and Nominal Core Crystal Clock
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* Information Leaf
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*/
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maxleaf = __get_cpuid_max(0, NULL);
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if (maxleaf >= 0x15) {
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__cpuid(0x15, a, b, c, d);
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/* EBX : TSC/Crystal ratio, ECX : Crystal Hz */
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if (b && c)
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return c * (b / a);
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}
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__cpuid(0x1, a, b, c, d);
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model = rte_cpu_get_model(a);
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if (check_model_wsm_nhm(model))
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mult = 133;
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else if ((c & bit_AVX) || check_model_gdm_dnv(model))
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mult = 100;
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else
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return 0;
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ret = rdmsr(0xCE, &tsc_hz);
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if (ret < 0)
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return 0;
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return ((tsc_hz >> 8) & 0xff) * mult * 1E6;
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}
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