pcpu.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
    5  * Copyright (c) Peter Wemm <peter@netplex.com.au>
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      from: src/sys/alpha/include/pcpu.h,v 1.15 2004/11/05 19:16:44 jhb
   30  * $FreeBSD: releng/12.0/sys/mips/include/pcpu.h 326259 2017-11-27 15:07:26Z pfg $
   31  */
   32 
   33 #ifndef _MACHINE_PCPU_H_
   34 #define _MACHINE_PCPU_H_
   35 
   36 #include <machine/cpufunc.h>
   37 #include <machine/pte.h>
   38 
   39 #define PCPU_MD_COMMON_FIELDS                                           \
   40         pd_entry_t      *pc_segbase;            /* curthread segbase */ \
   41         struct  pmap    *pc_curpmap;            /* pmap of curthread */ \
   42         u_int32_t       pc_next_asid;           /* next ASID to alloc */ \
   43         u_int32_t       pc_asid_generation;     /* current ASID generation */ \
   44         u_int           pc_pending_ipis;        /* IPIs pending to this CPU */ \
   45         struct  pcpu    *pc_self;               /* globally-uniqe self pointer */
   46 
   47 #ifdef  __mips_n64
   48 #define PCPU_MD_MIPS64_FIELDS                                           \
   49         PCPU_MD_COMMON_FIELDS                                           \
   50         char            __pad[245]
   51 #else
   52 #define PCPU_MD_MIPS32_FIELDS                                           \
   53         PCPU_MD_COMMON_FIELDS                                           \
   54         char            __pad[125]
   55 #endif
   56 
   57 #ifdef  __mips_n64
   58 #define PCPU_MD_FIELDS  PCPU_MD_MIPS64_FIELDS
   59 #else
   60 #define PCPU_MD_FIELDS  PCPU_MD_MIPS32_FIELDS
   61 #endif
   62 
   63 #ifdef _KERNEL
   64 
   65 extern char pcpu_space[MAXCPU][PAGE_SIZE * 2];
   66 #define PCPU_ADDR(cpu)          (struct pcpu *)(pcpu_space[(cpu)])
   67 
   68 extern struct pcpu *pcpup;
   69 #define PCPUP   pcpup
   70 
   71 /*
   72  * Since we use a wired TLB entry to map the same VA to a different
   73  * physical page for each CPU, get_pcpu() must use the pc_self
   74  * field to obtain a globally-unique pointer.
   75  */
   76 #define get_pcpu()              (PCPUP->pc_self)
   77 
   78 #define PCPU_ADD(member, value) (PCPUP->pc_ ## member += (value))
   79 #define PCPU_GET(member)        (PCPUP->pc_ ## member)
   80 #define PCPU_INC(member)        PCPU_ADD(member, 1)
   81 #define PCPU_PTR(member)        (&PCPUP->pc_ ## member)
   82 #define PCPU_SET(member,value)  (PCPUP->pc_ ## member = (value))
   83 #define PCPU_LAZY_INC(member)   (++PCPUP->pc_ ## member)
   84 
   85 #ifdef SMP
   86 /*
   87  * Instantiate the wired TLB entry at PCPU_TLB_ENTRY to map 'pcpu' at 'pcpup'.
   88  */
   89 void    mips_pcpu_tlb_init(struct pcpu *pcpu);
   90 #endif
   91 
   92 #endif  /* _KERNEL */
   93 
   94 #endif  /* !_MACHINE_PCPU_H_ */

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

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