The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/runq.h

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    1 /*-
    2  * Copyright (c) 2001 Jake Burkholder <jake@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  *      from: src/sys/i386/include/runq.h,v 1.3 2005/01/06 22:18:15 imp
   27  * $FreeBSD$
   28  */
   29 
   30 #ifndef _MACHINE_RUNQ_H_
   31 #define _MACHINE_RUNQ_H_
   32 
   33 #ifdef __mips_n64
   34 #define RQB_LEN         (1)             /* Number of priority status words. */
   35 #define RQB_L2BPW       (6)             /* Log2(sizeof(rqb_word_t) * NBBY)). */
   36 #else
   37 #define RQB_LEN         (2)             /* Number of priority status words. */
   38 #define RQB_L2BPW       (5)             /* Log2(sizeof(rqb_word_t) * NBBY)). */
   39 #endif
   40 #define RQB_BPW         (1<<RQB_L2BPW)  /* Bits in an rqb_word_t. */
   41 
   42 #define RQB_BIT(pri)    (1ul << ((pri) & (RQB_BPW - 1)))
   43 #define RQB_WORD(pri)   ((pri) >> RQB_L2BPW)
   44 
   45 #ifdef __mips_n64
   46 #define RQB_FFS(word)   (ffsl(word) - 1)
   47 #else
   48 #define RQB_FFS(word)   (ffs(word) - 1)
   49 #endif
   50 
   51 /*
   52  * Type of run queue status word.
   53  */
   54 #ifdef __mips_n64
   55 typedef u_int64_t       rqb_word_t;
   56 #else
   57 typedef u_int32_t       rqb_word_t;
   58 #endif
   59 
   60 #endif

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