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/10.2/sys/arm/include/pcpu.h 266277 2014-05-17 00:53:12Z ian $
   28  */
   29 
   30 #ifndef _MACHINE_PCPU_H_
   31 #define _MACHINE_PCPU_H_
   32 
   33 #ifdef _KERNEL
   34 
   35 #include <machine/cpuconf.h>
   36 
   37 #define ALT_STACK_SIZE  128
   38 
   39 struct vmspace;
   40 
   41 #endif  /* _KERNEL */
   42 
   43 #ifdef VFP
   44 #define PCPU_MD_FIELDS                                                  \
   45         unsigned int pc_cpu;                                            \
   46         unsigned int pc_vfpsid;                                         \
   47         unsigned int pc_vfpmvfr0;                                       \
   48         unsigned int pc_vfpmvfr1;                                       \
   49         struct pmap *pc_curpmap;                                        \
   50         char __pad[137]
   51 #else
   52 #define PCPU_MD_FIELDS                                                  \
   53         char __pad[157]
   54 #endif
   55 
   56 #ifdef _KERNEL
   57 
   58 struct pcb;
   59 struct pcpu;
   60 
   61 extern struct pcpu *pcpup;
   62 #if ARM_ARCH_6 || ARM_ARCH_7A
   63 /* or ARM_TP_ADDRESS    mark REMOVE ME NOTE */
   64 
   65 #define CPU_MASK (0xf)
   66 
   67 #ifndef SMP
   68 #define get_pcpu() (pcpup)
   69 #else
   70 #define get_pcpu() __extension__ ({                                     \
   71         int id;                                                         \
   72         __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));      \
   73         (pcpup + (id & CPU_MASK));                                      \
   74     })
   75 #endif
   76         
   77 static inline struct thread *
   78 get_curthread(void)
   79 {
   80         void *ret;
   81 
   82         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
   83         return (ret);
   84 }
   85 
   86 static inline void
   87 set_curthread(struct thread *td)
   88 {
   89 
   90         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
   91 }
   92 
   93 
   94 static inline void *
   95 get_tls(void)
   96 {
   97         void *tls;
   98 
   99         __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
  100         return (tls);
  101 }
  102 
  103 static inline void
  104 set_tls(void *tls)
  105 {
  106 
  107         __asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
  108 }
  109 
  110 #define curthread get_curthread()
  111 
  112 #else
  113 #define get_pcpu()      pcpup
  114 #endif
  115 
  116 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
  117 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
  118 #define PCPU_INC(member)        PCPU_ADD(member, 1)
  119 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
  120 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
  121 
  122 void pcpu0_init(void);
  123 #endif  /* _KERNEL */
  124 
  125 #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