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/* Print CPU diagnostics data in ld.so. PowerPC version.
Copyright (C) 2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <dl-diagnostics.h>
#include <dl-hwcap-info.h>
#include <ldsodefs.h>
#include <sys/auxv.h>
static void
print_hwcap_value (const char *label, int hwcap, unsigned long int value)
{
_dl_printf ("powerpc.cpu_features.%s=\"", label);
size_t offset = 0;
for (int i = 0; i < __dl_hwcap_info_size; ++i)
{
const char *hwcap_name = __dl_hwcap_names + offset;
size_t hwcap_name_len = strlen (hwcap_name);
if (hwcap == __dl_hwcap_info[i].hwcap
&& value & __dl_hwcap_info[i].value)
_dl_printf ("%s ", hwcap_name);
offset += hwcap_name_len + 1;
}
_dl_printf ("\"\n");
}
static void
print_cache_geometry_value (const char *label, unsigned long int geometry)
{
unsigned long int assocty, line;
_dl_printf ("powerpc.cpu_features.%s=\"", label);
line = geometry & 0xffff;
assocty = (geometry >> 16) & 0xffff;
if (line == 0)
_dl_printf ("Unknown line size, ");
else
_dl_printf ("%luB line size, ", line);
switch (assocty)
{
case 0:
_dl_printf ("Unknown associativity");
break;
case 1:
_dl_printf ("Directly mapped");
break;
case 0xffff:
_dl_printf ("Fully associative");
break;
default:
_dl_printf ("%lu-way set associative", assocty);
}
_dl_printf ("\"\n");
}
void
_dl_diagnostics_cpu (void)
{
print_hwcap_value ("hwcap", AT_HWCAP, GLRO(dl_hwcap));
print_hwcap_value ("hwcap2", AT_HWCAP2, GLRO(dl_hwcap2));
print_hwcap_value ("hwcap3", AT_HWCAP3, GLRO(dl_hwcap3));
print_hwcap_value ("hwcap4", AT_HWCAP4, GLRO(dl_hwcap4));
for (ElfW(auxv_t) *av = GLRO(dl_auxv); av->a_type != AT_NULL; ++av)
switch (av->a_type)
{
case AT_L1I_CACHEGEOMETRY:
print_cache_geometry_value ("l1i_cachegeometry", av->a_un.a_val);
break;
case AT_L1D_CACHEGEOMETRY:
print_cache_geometry_value ("l1d_cachegeometry", av->a_un.a_val);
break;
case AT_L2_CACHEGEOMETRY:
print_cache_geometry_value ("l2_cachegeometry", av->a_un.a_val);
break;
case AT_L3_CACHEGEOMETRY:
print_cache_geometry_value ("l3_cachegeometry", av->a_un.a_val);
break;
}
}
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