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

     /*-
      * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
      * Copyright (c) Peter Wemm <peter@netplex.com.au>
      * 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     *
     *      from: src/sys/alpha/include/pcpu.h,v 1.15 2004/11/05 19:16:44 jhb
     * $FreeBSD: releng/8.0/sys/mips/include/pcpu.h 181875 2008-08-19 19:53:52Z jhb $
     */
    
    #ifndef _MACHINE_PCPU_H_
    #define _MACHINE_PCPU_H_
    
    #include <machine/pte.h>
    
    #define PCPU_MD_FIELDS                                                  \
            pd_entry_t      *pc_segbase;            /* curthread segbase */ \
            struct  pmap    *pc_curpmap;            /* pmap of curthread */ \
            u_int32_t       pc_next_asid;           /* next ASID to alloc */ \
            u_int32_t       pc_asid_generation;     /* current ASID generation */ \
            u_int           pc_pending_ipis;        /* the IPIs pending to this CPU */ \
            void            *pc_boot_stack;
    
    #ifdef _KERNEL
    
    #ifdef SMP
    static __inline struct pcpu*
    get_pcpup(void)
    {
            /*
             * FREEBSD_DEVELOPERS_FIXME
             * In multiprocessor case, store/retrieve the pcpu structure
             * address for current CPU in scratch register for fast access.
             *
             * In this routine, read the scratch register to retrieve the PCPU
             * structure for this CPU
             */
            struct pcpu *ret;
    
            /* ret should contain the pointer to the PCPU structure for this CPU */
            return(ret);
    }
    
    #define PCPUP   ((struct pcpu *)get_pcpup())
    #else
    /* Uni processor systems */
    extern struct pcpu *pcpup;
    #define PCPUP   pcpup
    #endif /* SMP */
    
    #define PCPU_ADD(member, value) (PCPUP->pc_ ## member += (value))
    #define PCPU_GET(member)        (PCPUP->pc_ ## member)
    #define PCPU_INC(member)        PCPU_ADD(member, 1)
    #define PCPU_PTR(member)        (&PCPUP->pc_ ## member)
    #define PCPU_SET(member,value)  (PCPUP->pc_ ## member = (value))
    #define PCPU_LAZY_INC(member)   (++PCPUP->pc_ ## member)
    
    #endif  /* _KERNEL */
    
    #endif  /* !_MACHINE_PCPU_H_ */

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