sys/arch/alpha/include/proc.h

   1 /* $NetBSD: proc.h,v 1.17 2007/02/09 21:55:01 ad Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #ifndef _ALPHA_PROC_H
  31 #define _ALPHA_PROC_H
  32
  33 #include <sys/user.h> /* for sizeof(struct user) */
  34 #include <machine/frame.h>
  35
  36 /*
  37  * Machine-dependent part of the lwp struct for the Alpha.
  38  */
  39 struct mdlwp {
  40         u_long  md_flags;
  41         struct  trapframe *md_tf;       /* trap/syscall registers */
  42         struct pcb *md_pcbpaddr;        /* phys addr of the pcb */
  43         volatile int md_astpending;     /* AST pending for this process */
  44 };
  45 /*
  46  * md_flags usage
  47  * --------------
  48  * MDP_FPUSED
  49  *      A largely unused bit indicating the presence of FPU history.
  50  *      Cleared on exec. Set but not used by the fpu context switcher
  51  *      itself.
  52  *
  53  * MDP_FP_C
  54  *      The architected FP Control word. It should forever begin at bit 1,
  55  *      as the bits are AARM specified and this way it doesn't need to be
  56  *      shifted.
  57  *
  58  *      Until C99 there was never an IEEE 754 API, making most of the
  59  *      standard useless.  Because of overlapping AARM, OSF/1, NetBSD, and
  60  *      C99 API's, the use of the MDP_FP_C bits is defined variously in
  61  *      ieeefp.h and fpu.h.
  62  */
  63 #define MDP_FPUSED      0x00000001      /* Process used the FPU */
  64 #define MDP_FP_C        0x007ffffe      /* Extended FP_C Quadword bits */
  65
  66 /*
  67  * Machine-dependent part of the proc struct for the Alpha.
  68  */
  69 struct lwp;
  70 struct mdproc {
  71                                         /* this process's syscall vector */
  72         void    (*md_syscall)(struct lwp *, u_int64_t, struct trapframe *);
  73 };
  74
  75
  76 #endif /* !_ALPHA_PROC_H_ */