/*
* Copyright (c) 2017, IBM Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../common/include/os/os_util.h"
#define KERNEL_ADDR_START 0xc000000000000000
uint64_t
rdtsc(void)
{
uint64_t tb = 0;
__asm__ volatile("mftb %0" : "=r"(tb));
return (tb);
}
int
arch__cpuinfo_freq(double *freq, char *unit)
{
FILE *f;
char *line = NULL, *c;
size_t len = 0;
int ret = -1;
if ((f = fopen(CPUINFO_PATH, "r")) == NULL) {
return -1;
}
while (getline(&line, &len, f) > 0) {
if (strncmp(line, "clock", sizeof ("clock") -1)) {
continue;
}
if (sscanf(line + strcspn(line, ":") + 1, "%lf%10s",
freq, unit) == 2) {
if (strcasecmp(unit, "GHz") == 0) {
*freq *= GHZ;
} else if (strcasecmp(unit, "MHz") == 0) {
*freq *= MHZ;
}
break;
}
}
/*
* Hyperwiser does not expose cpufreq on PowerVMs(pSeries)
* servers. Thus 'clock' field from /proc/cpuinfo shows
* absolute max freq. While in case of PowerNV servers,
* 'clock' field shows current freq for each individual
* processor.
*
* Use 'clock' field to get freq on pSeries and fallback to
* sysfs cpufreq approach for PowerNV.
*/
while (getline(&line, &len, f) > 0) {
if (strncmp(line, "platform", sizeof("sizeof") -1)) {
continue;
}
c = strchr(line, ':');
if (c - line + 2 < len &&
!strncmp(c + 2, "pSeries", sizeof ("pSeries") - 1)) {
ret = 0;
break;
}
}
free(line);
fclose(f);
return ret;
}
int
is_userspace(uint64_t ip)
{
return (ip < KERNEL_ADDR_START && ip != 0x0);
}