// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* Copyright 2017, Michael Ellerman, IBM Corp.
|
*/
|
|
#include <elf.h>
|
#include <errno.h>
|
#include <fcntl.h>
|
#include <link.h>
|
#include <stdio.h>
|
#include <stdlib.h>
|
#include <string.h>
|
#include <sys/stat.h>
|
#include <sys/types.h>
|
#include <sys/wait.h>
|
#include <unistd.h>
|
|
#include "utils.h"
|
|
#ifndef AT_L1I_CACHESIZE
|
#define AT_L1I_CACHESIZE 40
|
#define AT_L1I_CACHEGEOMETRY 41
|
#define AT_L1D_CACHESIZE 42
|
#define AT_L1D_CACHEGEOMETRY 43
|
#define AT_L2_CACHESIZE 44
|
#define AT_L2_CACHEGEOMETRY 45
|
#define AT_L3_CACHESIZE 46
|
#define AT_L3_CACHEGEOMETRY 47
|
#endif
|
|
static void print_size(const char *label, uint32_t val)
|
{
|
printf("%s cache size: %#10x %10dB %10dK\n", label, val, val, val / 1024);
|
}
|
|
static void print_geo(const char *label, uint32_t val)
|
{
|
uint16_t assoc;
|
|
printf("%s line size: %#10x ", label, val & 0xFFFF);
|
|
assoc = val >> 16;
|
if (assoc)
|
printf("%u-way", assoc);
|
else
|
printf("fully");
|
|
printf(" associative\n");
|
}
|
|
static int test_cache_shape()
|
{
|
static char buffer[4096];
|
ElfW(auxv_t) *p;
|
int found;
|
|
FAIL_IF(read_auxv(buffer, sizeof(buffer)));
|
|
found = 0;
|
|
p = find_auxv_entry(AT_L1I_CACHESIZE, buffer);
|
if (p) {
|
found++;
|
print_size("L1I ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L1I_CACHEGEOMETRY, buffer);
|
if (p) {
|
found++;
|
print_geo("L1I ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L1D_CACHESIZE, buffer);
|
if (p) {
|
found++;
|
print_size("L1D ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L1D_CACHEGEOMETRY, buffer);
|
if (p) {
|
found++;
|
print_geo("L1D ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L2_CACHESIZE, buffer);
|
if (p) {
|
found++;
|
print_size("L2 ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L2_CACHEGEOMETRY, buffer);
|
if (p) {
|
found++;
|
print_geo("L2 ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L3_CACHESIZE, buffer);
|
if (p) {
|
found++;
|
print_size("L3 ", (uint32_t)p->a_un.a_val);
|
}
|
|
p = find_auxv_entry(AT_L3_CACHEGEOMETRY, buffer);
|
if (p) {
|
found++;
|
print_geo("L3 ", (uint32_t)p->a_un.a_val);
|
}
|
|
/* If we found none we're probably on a system where they don't exist */
|
SKIP_IF(found == 0);
|
|
/* But if we found any, we expect to find them all */
|
FAIL_IF(found != 8);
|
|
return 0;
|
}
|
|
int main(void)
|
{
|
return test_harness(test_cache_shape, "cache_shape");
|
}
|
