#ifndef FIO_ARCH_X86_COMMON

#define FIO_ARCH_X86_COMMON

#include <string.h>

static inline void cpuid(unsigned int op,

			 unsigned int *eax, unsigned int *ebx,

			 unsigned int *ecx, unsigned int *edx)

{

	*eax = op;

	*ecx = 0;

	do_cpuid(eax, ebx, ecx, edx);

}

#define ARCH_HAVE_INIT

extern bool tsc_reliable;

extern int arch_random;

static inline void arch_init_intel(void)

{

	unsigned int eax, ebx, ecx = 0, edx;

	/*

	 * Check for TSC

	 */

	eax = 1;

	do_cpuid(&eax, &ebx, &ecx, &edx;;

	if (!(edx & (1U << 4)))

		return;

	/*

	 * Check for constant rate and synced (across cores) TSC

	 */

	eax = 0x80000007;

	do_cpuid(&eax, &ebx, &ecx, &edx;;

	tsc_reliable = (edx & (1U << 8)) != 0;

	/*

	 * Check for FDRAND

	 */

	eax = 0x1;

	do_cpuid(&eax, &ebx, &ecx, &edx;;

	arch_random = (ecx & (1U << 30)) != 0;

}

static inline void arch_init_amd(void)

{

	unsigned int eax, ebx, ecx, edx;

	cpuid(0x80000000, &eax, &ebx, &ecx, &edx;;

	if (eax < 0x80000007)

		return;

	cpuid(0x80000007, &eax, &ebx, &ecx, &edx;;

	tsc_reliable = (edx & (1U << 8)) != 0;

}

static inline void arch_init(char *envp[])

{

	unsigned int level;

	char str[13];

	arch_random = tsc_reliable = 0;

	cpuid(0, &level, (unsigned int *) &str[0],

			 (unsigned int *) &str[8],

			 (unsigned int *) &str[4]);

	str[12] = '\0';

	if (!strcmp(str, "GenuineIntel"))

		arch_init_intel();

	else if (!strcmp(str, "AuthenticAMD") || !strcmp(str, "HygonGenuine"))

		arch_init_amd();

}

#endif