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76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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* Copyright (C) 2012 Vincent Hanquez <tab@snarc.org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of his contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "cryptonite_cpu.h"
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#include <stdint.h>
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#ifdef ARCH_X86
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static void cpuid(uint32_t info, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
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{
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*eax = info;
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asm volatile
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(
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#ifdef __x86_64__
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"mov %%rbx, %%rdi;"
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#else
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"mov %%ebx, %%edi;"
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#endif
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"cpuid;"
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"mov %%ebx, %%esi;"
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#ifdef __x86_64__
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"mov %%rdi, %%rbx;"
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#else
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"mov %%edi, %%ebx;"
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#endif
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:"+a" (*eax), "=S" (*ebx), "=c" (*ecx), "=d" (*edx)
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: :"edi");
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}
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#ifdef USE_AESNI
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void cryptonite_aesni_initialize_hw(void (*init_table)(int, int))
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{
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static int inited = 0;
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if (inited == 0) {
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uint32_t eax, ebx, ecx, edx;
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int aesni, pclmul;
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inited = 1;
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cpuid(1, &eax, &ebx, &ecx, &edx);
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aesni = (ecx & 0x02000000);
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pclmul = (ecx & 0x00000001);
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init_table(aesni, pclmul);
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}
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}
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#else
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#define cryptonite_aesni_initialize_hw(init_table) (0)
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#endif
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#endif
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