osfmk/ppc/thread_act.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  *
  25  */
  26
  27 #ifndef _PPC_THREAD_ACT_H_
  28 #define _PPC_THREAD_ACT_H_
  29
  30 #include <mach_kgdb.h>
  31 #include <mach/boolean.h>
  32 #include <mach/ppc/vm_types.h>
  33 #include <mach/thread_status.h>
  34 #include <kern/lock.h>
  35 #include <kern/clock.h>
  36 #include <ppc/savearea.h>
  37
  38 /*
  39  * Kernel state structure
  40  *
  41  * This holds the kernel state that is saved and restored across context
  42  * switches.
  43  */
  44
  45 /*
  46  * PPC process control block
  47  *
  48  * The PCB holds normal context.  It does not contain vector or floating point
  49  * registers.
  50  *
  51  */
  52
  53 typedef struct savearea pcb;
  54 typedef struct savearea *pcb_t;
  55
  56 struct facility_context {
  57
  58         savearea_fpu    *FPUsave;               /* The floating point savearea */
  59         savearea                *FPUlevel;              /* The floating point context level */
  60         unsigned int    FPUcpu;                 /* The last processor to enable floating point */
  61         savearea_vec    *VMXsave;               /* The VMX savearea */
  62         savearea                *VMXlevel;              /* The VMX context level */
  63         unsigned int    VMXcpu;                 /* The last processor to enable vector */
  64         struct thread_activation *facAct;       /* Activation associated with context */
  65 };
  66
  67 typedef struct facility_context facility_context;
  68
  69 /*
  70  * Maps state flavor to number of words in the state:
  71  */
  72 extern unsigned int state_count[];
  73
  74 #define USER_REGS(ThrAct)       ((ThrAct)->mact.pcb)
  75
  76 #define user_pc(ThrAct)         ((ThrAct)->mact.pcb->save_srr0)
  77
  78 #define act_machine_state_ptr(ThrAct)   (thread_state_t)USER_REGS(ThrAct)
  79
  80 typedef struct MachineThrAct {
  81         /*
  82          * pointer to process control block control blocks.  Potentially
  83          * one for each active facility context.  They may point to the
  84          * same saveareas.
  85          */
  86         savearea                *pcb;                   /* The "normal" savearea */
  87         facility_context *curctx;               /* Current facility context */
  88         facility_context *deferctx;             /* Deferred facility context */
  89         facility_context facctx;                /* "Normal" facility context */
  90         struct vmmCntrlEntry *vmmCEntry;        /* Pointer current emulation context or 0 */
  91         struct vmmCntrlTable *vmmControl;       /* Pointer to virtual machine monitor control table */
  92         uint64_t                qactTimer;              /* Time thread needs to interrupt. This is a single-shot timer. Zero is unset */
  93         unsigned int    ksp;                    /* points to TOP OF STACK or zero */
  94         unsigned int    bbDescAddr;             /* Points to Blue Box Trap descriptor area in kernel (page aligned) */
  95         unsigned int    bbUserDA;               /* Points to Blue Box Trap descriptor area in user (page aligned) */
  96         unsigned int    bbTableStart;   /* Points to Blue Box Trap dispatch area in user */
  97         unsigned int    emPendRupts;    /* Number of pending emulated interruptions */
  98         unsigned int    bbTaskID;               /* Opaque task ID for Blue Box threads */
  99         unsigned int    bbTaskEnv;              /* Opaque task data reference for Blue Box threads */
 100         unsigned int    specFlags;              /* Special flags */
 101
 102 /* special flags bits */
 103
 104 #define ignoreZeroFaultbit              0
 105 #define floatUsedbit                    1
 106 #define vectorUsedbit                   2
 107 #define runningVMbit                    4
 108 #define floatCngbit                             5
 109 #define vectorCngbit                    6
 110 #define timerPopbit                             7
 111 #define userProtKeybit                  8
 112 #define trapUnalignbit                  9
 113 #define notifyUnalignbit                10
 114 #define FamVMenabit                     11
 115 #define FamVMmodebit                    12
 116 /*      NOTE: Do not move or assign bit 31 without changing exception vector ultra fast path code */
 117 #define bbThreadbit                             28
 118 #define bbNoMachSCbit                   29
 119 #define bbPreemptivebit                 30
 120 #define spfReserved1                    31      /* See note above */
 121
 122 #define ignoreZeroFault         (1<<(31-ignoreZeroFaultbit))
 123 #define floatUsed                       (1<<(31-floatUsedbit))
 124 #define vectorUsed                      (1<<(31-vectorUsedbit))
 125 #define runningVM                       (1<<(31-runningVMbit))
 126 #define floatCng                        (1<<(31-floatCngbit))
 127 #define vectorCng                       (1<<(31-vectorCngbit))
 128 #define timerPop                        (1<<(31-timerPopbit))
 129 #define userProtKey                     (1<<(31-userProtKeybit))
 130 #define trapUnalign                     (1<<(31-trapUnalignbit))
 131 #define notifyUnalign           (1<<(31-notifyUnalignbit))
 132 #define FamVMena                        (1<<(31-FamVMenabit))
 133 #define FamVMmode                       (1<<(31-FamVMmodebit))
 134 #define bbThread                        (1<<(31-bbThreadbit))
 135 #define bbNoMachSC                      (1<<(31-bbNoMachSCbit))
 136 #define bbPreemptive            (1<<(31-bbPreemptivebit))
 137
 138 #define fvChkb 0
 139 #define fvChk 0x80000000
 140
 141 #ifdef  MACH_BSD
 142         unsigned long   cthread_self;   /* for use of cthread package */
 143 #endif
 144
 145 } MachineThrAct, *MachineThrAct_t;
 146
 147 extern struct savearea *find_user_regs(thread_act_t act);
 148 extern struct savearea *get_user_regs(thread_act_t);
 149 extern struct savearea_fpu *find_user_fpu(thread_act_t act);
 150 extern struct savearea_vec *find_user_vec(thread_act_t act);
 151 extern int thread_enable_fpe(thread_act_t act, int onoff);
 152
 153 extern void *act_thread_csave(void);
 154 extern void act_thread_catt(void *ctx);
 155 extern void act_thread_cfree(void *ctx);
 156
 157 #define current_act_fast()      current_act()
 158
 159 #endif  /* _PPC_THREAD_ACT_H_ */