FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/delay.h

     /*-
      * Copyright (c) 2010 Isilon Systems, Inc.
      * Copyright (c) 2010 iX Systems, Inc.
      * Copyright (c) 2010 Panasas, Inc.
      * Copyright (c) 2013-2021 Mellanox Technologies, Ltd.
      * Copyright (c) 2014 François Tigeot
      * 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 unmodified, 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    #ifndef _LINUXKPI_LINUX_DELAY_H_
    #define _LINUXKPI_LINUX_DELAY_H_
    
    #include <linux/jiffies.h>
    #include <sys/systm.h>
    
    static inline void
    linux_msleep(unsigned int ms)
    {
            /* guard against invalid values */
            if (ms == 0)
                    ms = 1;
            pause_sbt("lnxsleep", mstosbt(ms), 0, C_HARDCLOCK);
    }
    
    #undef msleep
    #define msleep(ms) linux_msleep(ms)
    
    #undef msleep_interruptible
    #define msleep_interruptible(ms) linux_msleep_interruptible(ms)
    
    #define udelay(t)       DELAY(t)
    
    static inline void
    mdelay(unsigned long msecs)
    {
            while (msecs--)
                    DELAY(1000);
    }
    
    static inline void
    ndelay(unsigned long x)
    {
            DELAY(howmany(x, 1000));
    }
    
    static inline void
    usleep_range(unsigned long min, unsigned long max)
    {
            /* guard against invalid values */
            if (min == 0)
                    min = 1;
            pause_sbt("lnxsleep", ustosbt(min), 0, C_HARDCLOCK);
    }
    
    extern unsigned int linux_msleep_interruptible(unsigned int ms);
    
    static inline void
    fsleep(unsigned long us)
    {
    
            if (us < 10)
                    udelay(us);
            else
                    usleep_range(us, us);
    }
    
    #endif  /* _LINUXKPI_LINUX_DELAY_H_ */

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