1. 根目录:
2. arch
3. xtensa
4. include
5. asm
6. param.h

/*
 * include/asm-xtensa/param.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */
#ifndef _XTENSA_PARAM_H
#define _XTENSA_PARAM_H

#include <uapi/asm/param.h>

# define HZ		CONFIG_HZ	/* internal timer frequency */
# define USER_HZ	100		/* for user interfaces in "ticks" */
# define CLOCKS_PER_SEC (USER_HZ)	/* frequnzy at which times() counts */
#endif /* _XTENSA_PARAM_H */