osfmk/ppc/thread_act.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  *
  28  */
  29
  30 #ifndef _PPC_THREAD_ACT_H_
  31 #define _PPC_THREAD_ACT_H_
  32
  33 #include <mach_kgdb.h>
  34 #include <mach/boolean.h>
  35 #include <mach/ppc/vm_types.h>
  36 #include <mach/thread_status.h>
  37 #include <kern/lock.h>
  38 #include <kern/clock.h>
  39 #include <ppc/savearea.h>
  40
  41 /*
  42  * Kernel state structure
  43  *
  44  * This holds the kernel state that is saved and restored across context
  45  * switches.
  46  */
  47
  48 /*
  49  * PPC process control block
  50  *
  51  * The PCB holds normal context.  It does not contain vector or floating point
  52  * registers.
  53  *
  54  */
  55
  56 typedef struct savearea pcb;
  57 typedef struct savearea *pcb_t;
  58
  59 struct facility_context {
  60
  61         savearea_fpu    *FPUsave;               /* The floating point savearea */
  62         savearea                *FPUlevel;              /* The floating point context level */
  63         unsigned int    FPUcpu;                 /* The last processor to enable floating point */
  64         savearea_vec    *VMXsave;               /* The VMX savearea */
  65         savearea                *VMXlevel;              /* The VMX context level */
  66         unsigned int    VMXcpu;                 /* The last processor to enable vector */
  67         struct thread_activation *facAct;       /* Activation associated with context */
  68 };
  69
  70 typedef struct facility_context facility_context;
  71
  72 /*
  73  * Maps state flavor to number of words in the state:
  74  */
  75 extern unsigned int state_count[];
  76
  77 #define USER_REGS(ThrAct)       ((ThrAct)->mact.pcb)
  78
  79 #define user_pc(ThrAct)         ((ThrAct)->mact.pcb->save_srr0)
  80
  81 #define act_machine_state_ptr(ThrAct)   (thread_state_t)USER_REGS(ThrAct)
  82
  83 typedef struct MachineThrAct {
  84         /*
  85          * pointer to process control block control blocks.  Potentially
  86          * one for each active facility context.  They may point to the
  87          * same saveareas.
  88          */
  89         savearea                *pcb;                   /* The "normal" savearea */
  90         facility_context *curctx;               /* Current facility context */
  91         facility_context *deferctx;             /* Deferred facility context */
  92         facility_context facctx;                /* "Normal" facility context */
  93         struct vmmCntrlEntry *vmmCEntry;        /* Pointer current emulation context or 0 */
  94         struct vmmCntrlTable *vmmControl;       /* Pointer to virtual machine monitor control table */
  95         uint64_t                qactTimer;              /* Time thread needs to interrupt. This is a single-shot timer. Zero is unset */
  96         unsigned int    ksp;                    /* points to TOP OF STACK or zero */
  97         unsigned int    bbDescAddr;             /* Points to Blue Box Trap descriptor area in kernel (page aligned) */
  98         unsigned int    bbUserDA;               /* Points to Blue Box Trap descriptor area in user (page aligned) */
  99         unsigned int    bbTableStart;   /* Points to Blue Box Trap dispatch area in user */
 100         unsigned int    emPendRupts;    /* Number of pending emulated interruptions */
 101         unsigned int    bbTaskID;               /* Opaque task ID for Blue Box threads */
 102         unsigned int    bbTaskEnv;              /* Opaque task data reference for Blue Box threads */
 103         unsigned int    specFlags;              /* Special flags */
 104
 105 /* special flags bits */
 106
 107 #define ignoreZeroFaultbit              0
 108 #define floatUsedbit                    1
 109 #define vectorUsedbit                   2
 110 #define runningVMbit                    4
 111 #define floatCngbit                             5
 112 #define vectorCngbit                    6
 113 #define timerPopbit                             7
 114 #define userProtKeybit                  8
 115 #define trapUnalignbit                  9
 116 #define notifyUnalignbit                10
 117 #define FamVMenabit                     11
 118 #define FamVMmodebit                    12
 119 /*      NOTE: Do not move or assign bit 31 without changing exception vector ultra fast path code */
 120 #define bbThreadbit                             28
 121 #define bbNoMachSCbit                   29
 122 #define bbPreemptivebit                 30
 123 #define spfReserved1                    31      /* See note above */
 124
 125 #define ignoreZeroFault         (1<<(31-ignoreZeroFaultbit))
 126 #define floatUsed                       (1<<(31-floatUsedbit))
 127 #define vectorUsed                      (1<<(31-vectorUsedbit))
 128 #define runningVM                       (1<<(31-runningVMbit))
 129 #define floatCng                        (1<<(31-floatCngbit))
 130 #define vectorCng                       (1<<(31-vectorCngbit))
 131 #define timerPop                        (1<<(31-timerPopbit))
 132 #define userProtKey                     (1<<(31-userProtKeybit))
 133 #define trapUnalign                     (1<<(31-trapUnalignbit))
 134 #define notifyUnalign           (1<<(31-notifyUnalignbit))
 135 #define FamVMena                        (1<<(31-FamVMenabit))
 136 #define FamVMmode                       (1<<(31-FamVMmodebit))
 137 #define bbThread                        (1<<(31-bbThreadbit))
 138 #define bbNoMachSC                      (1<<(31-bbNoMachSCbit))
 139 #define bbPreemptive            (1<<(31-bbPreemptivebit))
 140
 141 #define fvChkb 0
 142 #define fvChk 0x80000000
 143
 144 #ifdef  MACH_BSD
 145         unsigned long   cthread_self;   /* for use of cthread package */
 146 #endif
 147
 148 } MachineThrAct, *MachineThrAct_t;
 149
 150 extern struct savearea *find_user_regs(thread_act_t act);
 151 extern struct savearea *get_user_regs(thread_act_t);
 152 extern struct savearea_fpu *find_user_fpu(thread_act_t act);
 153 extern struct savearea_vec *find_user_vec(thread_act_t act);
 154 extern int thread_enable_fpe(thread_act_t act, int onoff);
 155
 156 extern void *act_thread_csave(void);
 157 extern void act_thread_catt(void *ctx);
 158 extern void act_thread_cfree(void *ctx);
 159
 160 #define current_act_fast()      current_act()
 161
 162 #endif  /* _PPC_THREAD_ACT_H_ */