| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/cpu.h> |
| |
| #if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) |
| |
| #include <inttypes.h> |
| #include <stdio.h> |
| #include <sys/auxv.h> |
| |
| #include "arm_arch.h" |
| |
| |
| char CRYPTO_is_NEON_capable(void) { |
| return (OPENSSL_armcap_P & ARMV7_NEON) != 0; |
| } |
| |
| void CRYPTO_set_NEON_capable(char neon_capable) { |
| if (neon_capable) { |
| OPENSSL_armcap_P |= ARMV7_NEON; |
| } else { |
| OPENSSL_armcap_P &= ~ARMV7_NEON; |
| } |
| } |
| |
| char CRYPTO_is_NEON_functional(void) { |
| static const uint32_t kWantFlags = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL; |
| return (OPENSSL_armcap_P & kWantFlags) == kWantFlags; |
| } |
| |
| void CRYPTO_set_NEON_functional(char neon_functional) { |
| if (neon_functional) { |
| OPENSSL_armcap_P |= ARMV7_NEON_FUNCTIONAL; |
| } else { |
| OPENSSL_armcap_P &= ~ARMV7_NEON_FUNCTIONAL; |
| } |
| } |
| |
| void OPENSSL_cpuid_setup(void) { |
| unsigned long hwcap = getauxval(AT_HWCAP); |
| |
| #if defined(OPENSSL_ARM) |
| static const unsigned long kNEON = 1 << 12; |
| if ((hwcap & kNEON) == 0) { |
| return; |
| } |
| |
| /* In 32-bit mode, the ARMv8 feature bits are in a different aux vector |
| * value. */ |
| hwcap = getauxval(AT_HWCAP2); |
| |
| /* See /usr/include/asm/hwcap.h on an ARM installation for the source of |
| * these values. */ |
| static const unsigned long kAES = 1 << 0; |
| static const unsigned long kPMULL = 1 << 1; |
| static const unsigned long kSHA1 = 1 << 2; |
| static const unsigned long kSHA256 = 1 << 3; |
| #elif defined(OPENSSL_AARCH64) |
| /* See /usr/include/asm/hwcap.h on an aarch64 installation for the source of |
| * these values. */ |
| static const unsigned long kNEON = 1 << 1; |
| static const unsigned long kAES = 1 << 3; |
| static const unsigned long kPMULL = 1 << 4; |
| static const unsigned long kSHA1 = 1 << 5; |
| static const unsigned long kSHA256 = 1 << 6; |
| |
| if ((hwcap & kNEON) == 0) { |
| return; |
| } |
| #endif |
| |
| OPENSSL_armcap_P |= ARMV7_NEON | ARMV7_NEON_FUNCTIONAL; |
| |
| if (hwcap & kAES) { |
| OPENSSL_armcap_P |= ARMV8_AES; |
| } |
| if (hwcap & kPMULL) { |
| OPENSSL_armcap_P |= ARMV8_PMULL; |
| } |
| if (hwcap & kSHA1) { |
| OPENSSL_armcap_P |= ARMV8_SHA1; |
| } |
| if (hwcap & kSHA256) { |
| OPENSSL_armcap_P |= ARMV8_SHA256; |
| } |
| } |
| |
| #endif /* defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) */ |