/*
 * Copyright (C) 2018 Intel Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef RTL_H
#define RTL_H

#include <types.h>

union u_qword {
	struct {
		uint32_t low;
		uint32_t high;
	} dwords;

	uint64_t qword;

};

struct udiv_result {
	union u_qword q;
	union u_qword r;

};

/* Function prototypes */
void udelay(int us);
void *memchr(const void *void_s, int c, size_t n);
void *memmove(void *s1, const void *s2, size_t n);
int strcmp(const char *s1, const char *s2);
int strncmp(const char *s1, const char *s2, size_t n);
char *strcpy_s(char *d, size_t dmax, const char *s);
char *strncpy_s(char *d, size_t dmax, const char *s, size_t slen);
char *strchr(const char *s, int ch);
void mdelay(unsigned int ms);
size_t strnlen_s(const char *str, size_t maxlen);
void *memset(void *base, uint8_t v, size_t n);
void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen);
int udiv64(uint64_t dividend, uint64_t divisor, struct udiv_result *res);
int udiv32(uint32_t dividend, uint32_t divisor, struct udiv_result *res);
int atoi(const char *str);
long strtol_deci(const char *nptr);
uint64_t strtoul_hex(const char *nptr);

extern uint64_t tsc_hz;
#define US_TO_TICKS(x)	((x) * tsc_hz / 1000000UL)
#define CYCLES_PER_MS	US_TO_TICKS(1000UL)

#define TICKS_TO_US(x)	((((x) * (1000000UL >> 8)) / tsc_hz) << 8)
#define TICKS_TO_MS(x)	(((x) * 1000UL) / tsc_hz)

static inline uint64_t rdtsc(void)
{
	uint32_t lo, hi;

	asm volatile("rdtsc" : "=a" (lo), "=d" (hi));
	return ((uint64_t)hi << 32) | lo;
}
#endif /* RTL_H */