The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pcpu.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) Peter Wemm <peter@netplex.com.au>
    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  * $FreeBSD$
   27  */
   28 
   29 #ifndef _MACHINE_PCPU_H_
   30 #define _MACHINE_PCPU_H_
   31 
   32 #ifndef _SYS_CDEFS_H_
   33 #error this file needs sys/cdefs.h as a prerequisite
   34 #endif
   35 
   36 #ifdef _KERNEL
   37 
   38 #include <machine/segments.h>
   39 #include <machine/tss.h>
   40 
   41 /*
   42  * The SMP parts are setup in pmap.c and locore.s for the BSP, and
   43  * mp_machdep.c sets up the data for the AP's to "see" when they awake.
   44  * The reason for doing it via a struct is so that an array of pointers
   45  * to each CPU's data can be set up for things like "check curproc on all
   46  * other processors"
   47  */
   48 #define PCPU_MD_FIELDS                                                  \
   49         struct  pcpu *pc_prvspace;              /* Self-reference */    \
   50         struct  pmap *pc_curpmap;                                       \
   51         struct  i386tss pc_common_tss;                                  \
   52         struct  segment_descriptor pc_common_tssd;                      \
   53         struct  segment_descriptor *pc_tss_gdt;                         \
   54         struct  segment_descriptor *pc_fsgs_gdt;                        \
   55         int     pc_currentldt;                                          \
   56         u_int   pc_acpi_id;                                             \
   57         u_int   pc_apic_id
   58 
   59 #if defined(lint)
   60  
   61 extern struct pcpu *pcpup;
   62  
   63 #define PCPU_GET(member)        (pcpup->pc_ ## member)
   64 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
   65 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
   66  
   67 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) \
   68     && defined(__GNUCLIKE___OFFSETOF)
   69 
   70 /*
   71  * Evaluates to the byte offset of the per-cpu variable name.
   72  */
   73 #define __pcpu_offset(name)                                             \
   74         __offsetof(struct pcpu, name)
   75 
   76 /*
   77  * Evaluates to the type of the per-cpu variable name.
   78  */
   79 #define __pcpu_type(name)                                               \
   80         __typeof(((struct pcpu *)0)->name)
   81 
   82 /*
   83  * Evaluates to the address of the per-cpu variable name.
   84  */
   85 #define __PCPU_PTR(name) __extension__ ({                               \
   86         __pcpu_type(name) *__p;                                         \
   87                                                                         \
   88         __asm __volatile("movl %%fs:%1,%0; addl %2,%0"                  \
   89             : "=r" (__p)                                                \
   90             : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))),       \
   91               "i" (__pcpu_offset(name)));                               \
   92                                                                         \
   93         __p;                                                            \
   94 })
   95 
   96 /*
   97  * Evaluates to the value of the per-cpu variable name.
   98  */
   99 #define __PCPU_GET(name) __extension__ ({                               \
  100         __pcpu_type(name) __result;                                     \
  101                                                                         \
  102         if (sizeof(__result) == 1) {                                    \
  103                 u_char __b;                                             \
  104                 __asm __volatile("movb %%fs:%1,%0"                      \
  105                     : "=r" (__b)                                        \
  106                     : "m" (*(u_char *)(__pcpu_offset(name))));          \
  107                 __result = *(__pcpu_type(name) *)(void *)&__b;          \
  108         } else if (sizeof(__result) == 2) {                             \
  109                 u_short __w;                                            \
  110                 __asm __volatile("movw %%fs:%1,%0"                      \
  111                     : "=r" (__w)                                        \
  112                     : "m" (*(u_short *)(__pcpu_offset(name))));         \
  113                 __result = *(__pcpu_type(name) *)(void *)&__w;          \
  114         } else if (sizeof(__result) == 4) {                             \
  115                 u_int __i;                                              \
  116                 __asm __volatile("movl %%fs:%1,%0"                      \
  117                     : "=r" (__i)                                        \
  118                     : "m" (*(u_int *)(__pcpu_offset(name))));           \
  119                 __result = *(__pcpu_type(name) *)(void *)&__i;          \
  120         } else {                                                        \
  121                 __result = *__PCPU_PTR(name);                           \
  122         }                                                               \
  123                                                                         \
  124         __result;                                                       \
  125 })
  126 
  127 /*
  128  * Sets the value of the per-cpu variable name to value val.
  129  */
  130 #define __PCPU_SET(name, val) {                                         \
  131         __pcpu_type(name) __val = (val);                                \
  132                                                                         \
  133         if (sizeof(__val) == 1) {                                       \
  134                 u_char __b;                                             \
  135                 __b = *(u_char *)&__val;                                \
  136                 __asm __volatile("movb %1,%%fs:%0"                      \
  137                     : "=m" (*(u_char *)(__pcpu_offset(name)))           \
  138                     : "r" (__b));                                       \
  139         } else if (sizeof(__val) == 2) {                                \
  140                 u_short __w;                                            \
  141                 __w = *(u_short *)&__val;                               \
  142                 __asm __volatile("movw %1,%%fs:%0"                      \
  143                     : "=m" (*(u_short *)(__pcpu_offset(name)))          \
  144                     : "r" (__w));                                       \
  145         } else if (sizeof(__val) == 4) {                                \
  146                 u_int __i;                                              \
  147                 __i = *(u_int *)&__val;                                 \
  148                 __asm __volatile("movl %1,%%fs:%0"                      \
  149                     : "=m" (*(u_int *)(__pcpu_offset(name)))            \
  150                     : "r" (__i));                                       \
  151         } else {                                                        \
  152                 *__PCPU_PTR(name) = __val;                              \
  153         }                                                               \
  154 }
  155 
  156 #define PCPU_GET(member)        __PCPU_GET(pc_ ## member)
  157 #define PCPU_PTR(member)        __PCPU_PTR(pc_ ## member)
  158 #define PCPU_SET(member, val)   __PCPU_SET(pc_ ## member, val)
  159 
  160 static __inline struct thread *
  161 __curthread(void)
  162 {
  163         struct thread *td;
  164 
  165         __asm __volatile("movl %%fs:0,%0" : "=r" (td));
  166         return (td);
  167 }
  168 #define curthread (__curthread())
  169 
  170 #else
  171 #error this file needs to be ported to your compiler
  172 #endif
  173 
  174 #endif  /* _KERNEL */
  175 
  176 #endif  /* ! _MACHINE_PCPU_H_ */

Cache object: 391558e87fb5841722a148e67225fb6b


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.