sys/sparc64/include/pcpu.h

   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  * $FreeBSD$
  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_ */