sys/sun4v/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/frame.h>
  35 #include <machine/intr_machdep.h>
  36
  37 #define ALT_STACK_SIZE  128
  38
  39 struct pmap;
  40
  41 #ifdef KTR
  42 #define PCPU_MD_FIELDS_PAD      (3 - (PCPU_NAME_LEN + 7) / 8)
  43 #else
  44 #define PCPU_MD_FIELDS_PAD      3
  45 #endif
  46
  47 /*
  48  * Inside the kernel, the globally reserved register g7 is used to
  49  * point at the globaldata structure.
  50  */
  51 #define PCPU_MD_FIELDS                                                  \
  52         struct  intr_request pc_irpool[IR_FREE];                        \
  53         struct  intr_request *pc_irhead;                                \
  54         struct  intr_request **pc_irtail;                               \
  55         struct  intr_request *pc_irfree;                                \
  56         struct  pmap *pc_curpmap;                                       \
  57         vm_offset_t pc_addr;                                            \
  58         vm_offset_t *pc_mondo_data;                                     \
  59         vm_offset_t *pc_cpu_list;                                       \
  60         vm_offset_t *pc_cpu_q;                                          \
  61         vm_offset_t *pc_dev_q;                                          \
  62         vm_offset_t *pc_rq;                                             \
  63         vm_offset_t *pc_nrq;                                            \
  64         vm_paddr_t pc_mondo_data_ra;                                    \
  65         vm_paddr_t pc_cpu_list_ra;                                      \
  66         vm_paddr_t pc_cpu_q_ra;                                         \
  67         uint64_t pc_cpu_q_size;                                         \
  68         vm_paddr_t pc_dev_q_ra;                                         \
  69         uint64_t pc_dev_q_size;                                         \
  70         vm_paddr_t pc_rq_ra;                                            \
  71         uint64_t pc_rq_size;                                            \
  72         vm_paddr_t pc_nrq_ra;                                           \
  73         uint64_t pc_nrq_size;                                           \
  74         u_long  pc_tickref;                                             \
  75         u_long  pc_tickadj;                                             \
  76         struct rwindow pc_kwbuf;                                        \
  77         u_long  pc_kwbuf_sp;                                            \
  78         u_int   pc_kwbuf_full;                                          \
  79         struct rwindow pc_tsbwbuf[2];                                   \
  80         uint16_t pc_cpulist[MAXCPU];                                    \
  81         uint64_t pad[PCPU_MD_FIELDS_PAD];
  82
  83         /* XXX SUN4V_FIXME - as we access the *_ra and *_size fields in quick
  84          * succession we _really_ want them to be L1 cache line size aligned
  85          * and it is quite possible that we want all of ASI_QUEUE fields to
  86          * be L2 cache aligned - they're surrounded by per-cpu data, so there is
  87          * no possibility of false sharing, but this might help in reducing misses
  88          */
  89
  90 #ifdef _KERNEL
  91
  92 extern void *dpcpu0;
  93
  94 struct pcpu;
  95
  96 register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
  97
  98 #define PCPU_GET(member)        (pcpup->pc_ ## member)
  99
 100 /*
 101  * XXX The implementation of this operation should be made atomic
 102  * with respect to preemption.
 103  */
 104 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
 105 #define PCPU_INC(member)        PCPU_ADD(member, 1)
 106 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
 107 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
 108
 109 #endif  /* _KERNEL */
 110
 111 #endif  /* !_MACHINE_PCPU_H_ */