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proc.h revision 1.12 
      1 /* $NetBSD: proc.h,v 1.12 2003/01/17 22:11:16 thorpej 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 (at) 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 <machine/frame.h>
     34 
     35 /*
     36  * Machine-dependent part of the lwp struct for the Alpha.
     37  */
     38 struct mdlwp {
     39 	u_long	md_flags;
     40 	struct	trapframe *md_tf;	/* trap/syscall registers */
     41 	struct pcb *md_pcbpaddr;	/* phys addr of the pcb */
     42 };
     43 /*
     44  * md_flags usage
     45  * --------------
     46  * MDP_FPUSED
     47  * 	A largely unused bit indicating the presence of FPU history.
     48  * 	Cleared on exec. Set but not used by the fpu context switcher
     49  * 	itself.
     50  *
     51  * MDP_FP_C
     52  * 	The architected FP Control word. It should forever begin at bit 1,
     53  * 	as the bits are AARM specified and this way it doesn't need to be
     54  * 	shifted.
     55  *
     56  * 	Until C99 there was never an IEEE 754 API, making most of the
     57  * 	standard useless.  Because of overlapping AARM, OSF/1, NetBSD, and
     58  * 	C99 API's, the use of the MDP_FP_C bits is defined variously in
     59  * 	ieeefp.h and fpu.h.
     60  */
     61 #define	MDP_FPUSED	0x00000001	/* Process used the FPU */
     62 #define	MDP_FP_C	0x007ffffe	/* Extended FP_C Quadword bits */
     63 
     64 /*
     65  * Machine-dependent part of the proc struct for the Alpha.
     66  */
     67 struct lwp;
     68 struct mdproc {
     69 					/* this process's syscall vector */
     70 	void	(*md_syscall)(struct lwp *, u_int64_t, struct trapframe *);
     71 	__volatile int md_astpending;	/* AST pending for this process */
     72 };
     73 
     74 
     75 #endif /* !_ALPHA_PROC_H_ */
     76