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/11.0/sys/arm/include/pcpu.h 300694 2016-05-25 19:44:26Z 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 #if __ARM_ARCH >= 6
   44 #define PCPU_MD_FIELDS                                                  \
   45         unsigned int pc_vfpsid;                                         \
   46         unsigned int pc_vfpmvfr0;                                       \
   47         unsigned int pc_vfpmvfr1;                                       \
   48         struct pmap *pc_curpmap;                                        \
   49         vm_offset_t pc_qmap_addr;                                       \
   50         void *pc_qmap_pte;                                              \
   51         unsigned int pc_dbreg[32];                                      \
   52         int pc_dbreg_cmd;                                               \
   53         char __pad[1]
   54 #else
   55 #define PCPU_MD_FIELDS                                                  \
   56         vm_offset_t qmap_addr;                                          \
   57         void *pc_qmap_pte;                                              \
   58         char __pad[149]
   59 #endif
   60 
   61 #ifdef _KERNEL
   62 
   63 #define PC_DBREG_CMD_NONE       0
   64 #define PC_DBREG_CMD_LOAD       1
   65 
   66 struct pcb;
   67 struct pcpu;
   68 
   69 extern struct pcpu *pcpup;
   70 
   71 #if __ARM_ARCH >= 6
   72 #define CPU_MASK (0xf)
   73 
   74 #ifndef SMP
   75 #define get_pcpu() (pcpup)
   76 #else
   77 #define get_pcpu() __extension__ ({                                     \
   78         int id;                                                         \
   79         __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));      \
   80         (pcpup + (id & CPU_MASK));                                      \
   81     })
   82 #endif
   83 
   84 static inline struct thread *
   85 get_curthread(void)
   86 {
   87         void *ret;
   88 
   89         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
   90         return (ret);
   91 }
   92 
   93 static inline void
   94 set_curthread(struct thread *td)
   95 {
   96 
   97         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
   98 }
   99 
  100 
  101 static inline void *
  102 get_tls(void)
  103 {
  104         void *tls;
  105 
  106         __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
  107         return (tls);
  108 }
  109 
  110 static inline void
  111 set_tls(void *tls)
  112 {
  113 
  114         __asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
  115 }
  116 
  117 #define curthread get_curthread()
  118 
  119 #else
  120 #define get_pcpu()      pcpup
  121 #endif
  122 
  123 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
  124 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
  125 #define PCPU_INC(member)        PCPU_ADD(member, 1)
  126 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
  127 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
  128 
  129 void pcpu0_init(void);
  130 #endif  /* _KERNEL */
  131 
  132 #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