sys/arch/sh3/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.6 2008/04/28 20:23:35 martin 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 _SH3_MCONTEXT_H_
  33 #define _SH3_MCONTEXT_H_
  34
  35 /*
  36  * Layout of mcontext_t for the sh3 architecture.
  37  */
  38
  39 #define _NGREG          22
  40 typedef int             __greg_t;
  41 typedef __greg_t        __gregset_t[_NGREG];
  42
  43 #define _REG_GBR        0
  44 #define _REG_PC         1
  45 #define _REG_SR         2
  46 #define _REG_MACL       3
  47 #define _REG_MACH       4
  48 #define _REG_PR         5
  49 #define _REG_R14        6
  50 #define _REG_R13        7
  51 #define _REG_R12        8
  52 #define _REG_R11        9
  53 #define _REG_R10        10
  54 #define _REG_R9         11
  55 #define _REG_R8         12
  56 #define _REG_R7         13
  57 #define _REG_R6         14
  58 #define _REG_R5         15
  59 #define _REG_R4         16
  60 #define _REG_R3         17
  61 #define _REG_R2         18
  62 #define _REG_R1         19
  63 #define _REG_R0         20
  64 #define _REG_R15        21
  65 /* Convenience synonym */
  66 #define _REG_SP         _REG_R15
  67
  68 /*
  69  * FPU state description.
  70  * XXX: kernel doesn't support FPU yet, so this is just a placeholder.
  71  */
  72 typedef struct {
  73         int             __fpr_fpscr;
  74         int             __fpr_fpul;
  75         /* XXX: redefine as a union when we do support FPU */
  76         int             __fpr_regs[32]; /* SH3E has 16, SH4 has 32 */
  77 } __fpregset_t;
  78
  79 typedef struct {
  80         __gregset_t     __gregs;
  81         __fpregset_t    __fpregs;
  82 } mcontext_t;
  83
  84 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
  85 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
  86 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])
  87
  88 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
  89
  90 /*
  91  * Machine dependent uc_flags
  92  */
  93 #define _UC_SETSTACK            0x10000
  94 #define _UC_CLRSTACK            0x20000
  95
  96
  97 #endif /* !_SH3_MCONTEXT_H_ */