sys/powerpc/include/pcpu.h

   1 /*-
   2  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
   3  * Copyright (c) Peter Wemm <peter@netplex.com.au>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD$
  28  */
  29
  30 #ifndef _MACHINE_PCPU_H_
  31 #define _MACHINE_PCPU_H_
  32
  33 #include <machine/cpufunc.h>
  34 #include <machine/slb.h>
  35 #include <machine/tlb.h>
  36
  37 struct pmap;
  38 #define CPUSAVE_LEN     9
  39
  40 #define PCPU_MD_COMMON_FIELDS                                           \
  41         int             pc_inside_intr;                                 \
  42         struct pmap     *pc_curpmap;            /* current pmap */      \
  43         struct thread   *pc_fputhread;          /* current fpu user */  \
  44         struct thread   *pc_vecthread;          /* current vec user */  \
  45         uintptr_t       pc_hwref;                                       \
  46         uint32_t        pc_pir;                                         \
  47         int             pc_bsp;                                         \
  48         volatile int    pc_awake;                                       \
  49         uint32_t        pc_ipimask;                                     \
  50         register_t      pc_tempsave[CPUSAVE_LEN];                       \
  51         register_t      pc_disisave[CPUSAVE_LEN];                       \
  52         register_t      pc_dbsave[CPUSAVE_LEN];                         \
  53         void            *pc_restore;
  54
  55 #define PCPU_MD_AIM32_FIELDS                                            \
  56         /* char         __pad[0] */
  57
  58 #define PCPU_MD_AIM64_FIELDS                                            \
  59         struct slb      pc_slb[64];                                     \
  60         struct slb      **pc_userslb;                                   \
  61         register_t      pc_slbsave[18];                                 \
  62         uint8_t         pc_slbstack[1024];                              \
  63         char            __pad[1137]
  64
  65 #ifdef __powerpc64__
  66 #define PCPU_MD_AIM_FIELDS      PCPU_MD_AIM64_FIELDS
  67 #else
  68 #define PCPU_MD_AIM_FIELDS      PCPU_MD_AIM32_FIELDS
  69 #endif
  70
  71 #define BOOKE_CRITSAVE_LEN      (CPUSAVE_LEN + 2)
  72 #define BOOKE_TLB_MAXNEST       3
  73 #define BOOKE_TLB_SAVELEN       16
  74 #define BOOKE_TLBSAVE_LEN       (BOOKE_TLB_SAVELEN * BOOKE_TLB_MAXNEST)
  75
  76 #define PCPU_MD_BOOKE_FIELDS                                            \
  77         register_t      pc_booke_critsave[BOOKE_CRITSAVE_LEN];          \
  78         register_t      pc_booke_mchksave[CPUSAVE_LEN];                 \
  79         register_t      pc_booke_tlbsave[BOOKE_TLBSAVE_LEN];            \
  80         register_t      pc_booke_tlb_level;                             \
  81         uint32_t        *pc_booke_tlb_lock;                             \
  82         int             pc_tid_next;                                    \
  83         char            __pad[173]
  84
  85 /* Definitions for register offsets within the exception tmp save areas */
  86 #define CPUSAVE_R27     0               /* where r27 gets saved */
  87 #define CPUSAVE_R28     1               /* where r28 gets saved */
  88 #define CPUSAVE_R29     2               /* where r29 gets saved */
  89 #define CPUSAVE_R30     3               /* where r30 gets saved */
  90 #define CPUSAVE_R31     4               /* where r31 gets saved */
  91 #define CPUSAVE_AIM_DAR         5       /* where SPR_DAR gets saved */
  92 #define CPUSAVE_AIM_DSISR       6       /* where SPR_DSISR gets saved */
  93 #define CPUSAVE_BOOKE_DEAR      5       /* where SPR_DEAR gets saved */
  94 #define CPUSAVE_BOOKE_ESR       6       /* where SPR_ESR gets saved */
  95 #define CPUSAVE_SRR0    7               /* where SRR0 gets saved */
  96 #define CPUSAVE_SRR1    8               /* where SRR1 gets saved */
  97
  98 /* Book-E TLBSAVE is more elaborate */
  99 #define TLBSAVE_BOOKE_LR        0
 100 #define TLBSAVE_BOOKE_CR        1
 101 #define TLBSAVE_BOOKE_SRR0      2
 102 #define TLBSAVE_BOOKE_SRR1      3
 103 #define TLBSAVE_BOOKE_R20       4
 104 #define TLBSAVE_BOOKE_R21       5
 105 #define TLBSAVE_BOOKE_R22       6
 106 #define TLBSAVE_BOOKE_R23       7
 107 #define TLBSAVE_BOOKE_R24       8
 108 #define TLBSAVE_BOOKE_R25       9
 109 #define TLBSAVE_BOOKE_R26       10
 110 #define TLBSAVE_BOOKE_R27       11
 111 #define TLBSAVE_BOOKE_R28       12
 112 #define TLBSAVE_BOOKE_R29       13
 113 #define TLBSAVE_BOOKE_R30       14
 114 #define TLBSAVE_BOOKE_R31       15
 115
 116 #ifdef AIM
 117 #define PCPU_MD_FIELDS          \
 118         PCPU_MD_COMMON_FIELDS   \
 119         PCPU_MD_AIM_FIELDS
 120 #endif
 121 #if defined(BOOKE)
 122 #define PCPU_MD_FIELDS          \
 123         PCPU_MD_COMMON_FIELDS   \
 124         PCPU_MD_BOOKE_FIELDS
 125 #endif
 126
 127 /*
 128  * Catch-all for ports (e.g. lsof, used by gtop)
 129  */
 130 #ifndef PCPU_MD_FIELDS
 131 #define PCPU_MD_FIELDS                                                  \
 132         int             pc_md_placeholder[32]
 133 #endif
 134
 135 #ifdef _KERNEL
 136
 137 #define pcpup   ((struct pcpu *) powerpc_get_pcpup())
 138
 139 static __inline __pure2 struct thread *
 140 __curthread(void)
 141 {
 142         struct thread *td;
 143 #ifdef __powerpc64__
 144         __asm __volatile("mr %0,13" : "=r"(td));
 145 #else
 146         __asm __volatile("mr %0,2" : "=r"(td));
 147 #endif
 148         return (td);
 149 }
 150 #define curthread (__curthread())
 151
 152 #define PCPU_GET(member)        (pcpup->pc_ ## member)
 153
 154 /*
 155  * XXX The implementation of this operation should be made atomic
 156  * with respect to preemption.
 157  */
 158 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
 159 #define PCPU_INC(member)        PCPU_ADD(member, 1)
 160 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
 161 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
 162
 163 #endif  /* _KERNEL */
 164
 165 #endif  /* !_MACHINE_PCPU_H_ */