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hwfeatures.c
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/* hwfeatures.c - Detect hardware features.
* Copyright (C) 2007, 2011 Free Software Foundation, Inc.
* Copyright (C) 2012 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
* Libgcrypt 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.
*
* Libgcrypt 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 this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include "g10lib.h"
#include "hwf-common.h"
/* A bit vector describing the hardware features currently
available. */
static unsigned int hw_features;
/* Return a bit vector describing the available hardware features.
The HWF_ constants are used to test for them. */
unsigned int
_gcry_get_hw_features (void)
{
return hw_features;
}
/* Detect the available hardware features. This function is called
once right at startup and we assume that no other threads are
running. */
void
_gcry_detect_hw_features (unsigned int disabled_features)
{
hw_features = 0;
if (fips_mode ())
return; /* Hardware support is not to be evaluated. */
#if defined (HAVE_CPU_ARCH_X86)
{
hw_features = _gcry_hwf_detect_x86 ();
}
#endif /* HAVE_CPU_ARCH_X86 */
#if defined (HAVE_CPU_ARCH_ARM)
{
hw_features = _gcry_hwf_detect_arm ();
}
#endif /* HAVE_CPU_ARCH_ARM */
hw_features &= ~disabled_features;
}

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