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/10.0/sys/arm/include/pcpu.h 254461 2013-08-17 18:51:38Z andrew $
   28  */
   29 
   30 #ifndef _MACHINE_PCPU_H_
   31 #define _MACHINE_PCPU_H_
   32 
   33 #ifdef _KERNEL
   34 
   35 #include <machine/cpuconf.h>
   36 #include <machine/frame.h>
   37 
   38 #define ALT_STACK_SIZE  128
   39 
   40 struct vmspace;
   41 
   42 #endif  /* _KERNEL */
   43 
   44 #ifdef VFP
   45 #define PCPU_MD_FIELDS                                                  \
   46         unsigned int pc_cpu;                                            \
   47         unsigned int pc_vfpsid;                                         \
   48         unsigned int pc_vfpmvfr0;                                       \
   49         unsigned int pc_vfpmvfr1;                                       \
   50         struct thread *pc_vfpcthread;                                   \
   51         struct pmap *pc_curpmap;                                        \
   52         char __pad[133]
   53 #else
   54 #define PCPU_MD_FIELDS                                                  \
   55         char __pad[157]
   56 #endif
   57 
   58 #ifdef _KERNEL
   59 
   60 struct pcb;
   61 struct pcpu;
   62 
   63 extern struct pcpu *pcpup;
   64 #if ARM_ARCH_6 || ARM_ARCH_7A
   65 /* or ARM_TP_ADDRESS    mark REMOVE ME NOTE */
   66 static inline struct pcpu *
   67 get_pcpu(void)
   68 {
   69         void *pcpu;
   70 
   71         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (pcpu));
   72         return (pcpu);
   73 }
   74 
   75 static inline void
   76 set_pcpu(void *pcpu)
   77 {
   78 
   79         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (pcpu));
   80 }
   81 
   82 static inline void *
   83 get_tls(void)
   84 {
   85         void *tls;
   86 
   87         __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
   88         return (tls);
   89 }
   90 
   91 static inline void
   92 set_tls(void *tls)
   93 {
   94 
   95         __asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
   96 }
   97 #else
   98 #define get_pcpu()      pcpup
   99 #endif
  100 
  101 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
  102 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
  103 #define PCPU_INC(member)        PCPU_ADD(member, 1)
  104 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
  105 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
  106 
  107 void pcpu0_init(void);
  108 #endif  /* _KERNEL */
  109 
  110 #endif  /* !_MACHINE_PCPU_H_ */

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

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