pcpu.h

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    1 /*-
    2  * Copyright (c) 1999 Luoqi Chen <luoqi@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: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
   27  * $FreeBSD: releng/10.1/sys/sparc64/include/pcpu.h 249265 2013-04-08 19:19:10Z glebius $
   28  */
   29 
   30 #ifndef _MACHINE_PCPU_H_
   31 #define _MACHINE_PCPU_H_
   32 
   33 #include <machine/asmacros.h>
   34 #include <machine/cache.h>
   35 #include <machine/frame.h>
   36 #include <machine/intr_machdep.h>
   37 
   38 #define ALT_STACK_SIZE  128
   39 
   40 struct pmap;
   41 
   42 /*
   43  * Inside the kernel, the globally reserved register g7 is used to
   44  * point at the globaldata structure.
   45  */
   46 #define PCPU_MD_FIELDS                                                  \
   47         struct  cacheinfo pc_cache;                                     \
   48         struct  intr_request pc_irpool[IR_FREE];                        \
   49         struct  intr_request *pc_irhead;                                \
   50         struct  intr_request **pc_irtail;                               \
   51         struct  intr_request *pc_irfree;                                \
   52         struct  pmap *pc_pmap;                                          \
   53         vm_offset_t pc_addr;                                            \
   54         u_long  pc_tickref;                                             \
   55         u_long  pc_tickadj;                                             \
   56         u_long  pc_tickincrement;                                       \
   57         u_int   pc_clock;                                               \
   58         u_int   pc_impl;                                                \
   59         u_int   pc_mid;                                                 \
   60         u_int   pc_node;                                                \
   61         u_int   pc_tlb_ctx;                                             \
   62         u_int   pc_tlb_ctx_max;                                         \
   63         u_int   pc_tlb_ctx_min;                                         \
   64         char    __pad[405]
   65 
   66 #ifdef _KERNEL
   67 
   68 extern void *dpcpu0;
   69 
   70 struct pcb;
   71 struct pcpu;
   72 
   73 register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
   74 register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
   75 
   76 #define PCPU_GET(member)        (pcpup->pc_ ## member)
   77 
   78 static __inline __pure2 struct thread *
   79 __curthread(void)
   80 {
   81         struct thread *td;
   82 
   83         __asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td));
   84         return (td);
   85 }
   86 #define curthread       (__curthread())
   87 
   88 /*
   89  * XXX The implementation of this operation should be made atomic
   90  * with respect to preemption.
   91  */
   92 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
   93 #define PCPU_INC(member)        PCPU_ADD(member, 1)
   94 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
   95 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
   96 
   97 #endif  /* _KERNEL */
   98 
   99 #endif  /* !_MACHINE_PCPU_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/sparc64/include/pcpu.h

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/include/pcpu.h