/*
 *	Copyright (C) 2012 Vincent Hanquez <tab@snarc.org>
 *
 * All rights reserved.
 * 
 * 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 above 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. Neither the name of the author nor the names of his contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 AUTHORS 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.
 *
 */
#include "cpu.h"
#include <stdint.h>

#ifdef ARCH_X86
static void cpuid(uint32_t info, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
{
	*eax = info;
	asm volatile
		(
#ifdef __x86_64__
		 "mov %%rbx, %%rdi;"
#else
		 "mov %%ebx, %%edi;"
#endif
		 "cpuid;"
		 "mov %%ebx, %%esi;"
#ifdef __x86_64__
		 "mov %%rdi, %%rbx;"
#else
		 "mov %%edi, %%ebx;"
#endif
		 :"+a" (*eax), "=S" (*ebx), "=c" (*ecx), "=d" (*edx)
		 : :"edi");
}

#ifdef USE_AESNI
void initialize_hw(void (*init_table)(int, int))
{
	static int inited = 0;
	if (inited == 0) {
		uint32_t eax, ebx, ecx, edx;
		int aesni, pclmul;

		inited = 1;
		cpuid(1, &eax, &ebx, &ecx, &edx);
		aesni = (ecx & 0x02000000);
		pclmul = (ecx & 0x00000001);
		init_table(aesni, pclmul);
	}
}
#else
#define initialize_hw(init_table) 	(0)
#endif

#endif
