1 /* $NetBSD: proc.h,v 1.15 2005/12/11 12:16:16 christos 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 <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