lib/eal/ppc/rte_cycles.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (C) IBM Corporation 2019.
   3  */
   4
   5 #include <features.h>
   6 #ifdef __GLIBC__
   7 #include <sys/platform/ppc.h>
   8 #elif RTE_EXEC_ENV_LINUX
   9 #include <string.h>
  10 #include <stdio.h>
  11 #endif
  12
  13 #include "eal_private.h"
  14
  15 uint64_t
  16 get_tsc_freq_arch(void)
  17 {
  18 #ifdef __GLIBC__
  19         return __ppc_get_timebase_freq();
  20 #elif RTE_EXEC_ENV_LINUX
  21         static unsigned long base;
  22         char buf[512];
  23         ssize_t nr;
  24         FILE *f;
  25
  26         if (base != 0)
  27                 goto out;
  28
  29         f = fopen("/proc/cpuinfo", "rb");
  30         if (f == NULL)
  31                 goto out;
  32
  33         while (fgets(buf, sizeof(buf), f) != NULL) {
  34                 char *ret = strstr(buf, "timebase");
  35
  36                 if (ret == NULL)
  37                         continue;
  38                 ret += sizeof("timebase") - 1;
  39                 ret = strchr(ret, ':');
  40                 if (ret == NULL)
  41                         continue;
  42                 base = strtoul(ret + 1, NULL, 10);
  43                 break;
  44         }
  45         fclose(f);
  46 out:
  47         return (uint64_t) base;
  48 #else
  49         return 0;
  50 #endif
  51
  52 }