sys/sparc64/include/pcpu.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  *      from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
  29  * $FreeBSD$
  30  */
  31
  32 #ifndef _MACHINE_PCPU_H_
  33 #define _MACHINE_PCPU_H_
  34
  35 #include <machine/asmacros.h>
  36 #include <machine/cache.h>
  37 #include <machine/frame.h>
  38 #include <machine/intr_machdep.h>
  39
  40 #define ALT_STACK_SIZE  128
  41
  42 struct pmap;
  43
  44 /*
  45  * Inside the kernel, the globally reserved register g7 is used to
  46  * point at the globaldata structure.
  47  */
  48 #define PCPU_MD_FIELDS                                                  \
  49         struct  cacheinfo pc_cache;                                     \
  50         struct  intr_request pc_irpool[IR_FREE];                        \
  51         struct  intr_request *pc_irhead;                                \
  52         struct  intr_request **pc_irtail;                               \
  53         struct  intr_request *pc_irfree;                                \
  54         struct  pmap *pc_pmap;                                          \
  55         vm_offset_t pc_addr;                                            \
  56         vm_offset_t pc_qmap_addr;                                       \
  57         u_long  pc_tickref;                                             \
  58         u_long  pc_tickadj;                                             \
  59         u_long  pc_tickincrement;                                       \
  60         u_int   pc_clock;                                               \
  61         u_int   pc_impl;                                                \
  62         u_int   pc_mid;                                                 \
  63         u_int   pc_node;                                                \
  64         u_int   pc_tlb_ctx;                                             \
  65         u_int   pc_tlb_ctx_max;                                         \
  66         u_int   pc_tlb_ctx_min;                                         \
  67         char    __pad[653]
  68
  69 #ifdef _KERNEL
  70
  71 extern void *dpcpu0;
  72
  73 struct pcb;
  74 struct pcpu;
  75
  76 register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
  77 register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
  78
  79 #define get_pcpu()              (pcpup)
  80 #define PCPU_GET(member)        (pcpup->pc_ ## member)
  81
  82 static __inline __pure2 struct thread *
  83 __curthread(void)
  84 {
  85         struct thread *td;
  86
  87         __asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td));
  88         return (td);
  89 }
  90 #define curthread       (__curthread())
  91
  92 /*
  93  * XXX The implementation of this operation should be made atomic
  94  * with respect to preemption.
  95  */
  96 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
  97 #define PCPU_INC(member)        PCPU_ADD(member, 1)
  98 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
  99 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
 100
 101 #endif  /* _KERNEL */
 102
 103 #endif  /* !_MACHINE_PCPU_H_ */