sys/arch/powerpc/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.7 2005/12/11 12:18:43 christos Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Klaus Klein.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _POWERPC_MCONTEXT_H_
  33 #define _POWERPC_MCONTEXT_H_
  34
  35 /*
  36  * Layout of mcontext_t based on the System V Application Binary Interface,
  37  * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and
  38  * extended for the AltiVec Register File.  Note that due to the increased
  39  * alignment requirements of the latter, the offset of mcontext_t within
  40  * an ucontext_t is different from System V.
  41  */
  42
  43 #define _NGREG  39              /* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */
  44
  45 typedef long            __greg_t;
  46 typedef __greg_t        __gregset_t[_NGREG];
  47
  48 #define _REG_R0         0
  49 #define _REG_R1         1
  50 #define _REG_R2         2
  51 #define _REG_R3         3
  52 #define _REG_R4         4
  53 #define _REG_R5         5
  54 #define _REG_R6         6
  55 #define _REG_R7         7
  56 #define _REG_R8         8
  57 #define _REG_R9         9
  58 #define _REG_R10        10
  59 #define _REG_R11        11
  60 #define _REG_R12        12
  61 #define _REG_R13        13
  62 #define _REG_R14        14
  63 #define _REG_R15        15
  64 #define _REG_R16        16
  65 #define _REG_R17        17
  66 #define _REG_R18        18
  67 #define _REG_R19        19
  68 #define _REG_R20        20
  69 #define _REG_R21        21
  70 #define _REG_R22        22
  71 #define _REG_R23        23
  72 #define _REG_R24        24
  73 #define _REG_R25        25
  74 #define _REG_R26        26
  75 #define _REG_R27        27
  76 #define _REG_R28        28
  77 #define _REG_R29        29
  78 #define _REG_R30        30
  79 #define _REG_R31        31
  80 #define _REG_CR         32              /* Condition Register */
  81 #define _REG_LR         33              /* Link Register */
  82 #define _REG_PC         34              /* PC (copy of SRR0) */
  83 #define _REG_MSR        35              /* MSR (copy of SRR1) */
  84 #define _REG_CTR        36              /* Count Register */
  85 #define _REG_XER        37              /* Integet Exception Reigster */
  86 #define _REG_MQ         38              /* MQ Register (POWER only) */
  87
  88 typedef struct {
  89         double          __fpu_regs[32]; /* FP0-31 */
  90         unsigned int    __fpu_fpscr;    /* FP Status and Control Register */
  91         unsigned int    __fpu_valid;    /* Set together with _UC_FPU */
  92 } __fpregset_t;
  93
  94 #define _NVR    32                      /* Number of Vector registers */
  95
  96 typedef struct {
  97         union __vr {
  98                 unsigned char   __vr8[16];
  99                 unsigned short  __vr16[8];
 100                 unsigned int    __vr32[4];
 101         }               __vrs[_NVR] __attribute__((__aligned__(16)));
 102         unsigned int    __vscr;         /* VSCR */
 103         unsigned int    __vrsave;       /* VRSAVE */
 104 } __vrf_t;
 105
 106 typedef struct {
 107         __gregset_t     __gregs;        /* General Purpose Register set */
 108         __fpregset_t    __fpregs;       /* Floating Point Register set */
 109         __vrf_t         __vrf;          /* Vector Register File */
 110 } mcontext_t;
 111
 112 /* Machine-dependent uc_flags */
 113 #define _UC_POWERPC_VEC 0x00010000      /* Vector Register File valid */
 114
 115 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_R1])
 116 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
 117 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R3])
 118
 119 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 120
 121 #endif  /* !_POWERPC_MCONTEXT_H_ */