/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007 coresystems GmbH
 * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifndef LIB_H
#define LIB_H
#include <shared.h>

/**
 * Return the size of a given array, no matter of which data type
 * the individual array elements are.
 */
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))

/* you have to explicity pick logc2 (ceiling) or log2f (floor) 
 * it is a no-op if you KNOW that your number is a power of 2. 
 * It is important to know what you are doing otherwise. 
 * example: log2c(72) is 7, log2f(72) is 6!
 */
int log2c(unsigned int n);
int log2f(unsigned int n);

void udelay(unsigned int usecs);
void mdelay(unsigned int msecs);
void delay(unsigned int secs);

/* all architectures must implement a 64-bit time counter
 * that is compiled into stage1 
 * rdtsc is usually fine. 
 */
u64 cycles(void);

void beep_short(void);
void beep_long(void);

/* Optional ramtest. */
int ram_check(unsigned long start, unsigned long stop);

/* required: a way to tell if this is a:
 * power-on/reset (coldboot) OR 
 * coreboot has initiated a reset (warmboot). 
 */
int is_coldboot(void);

#endif /* LIB_H */