1 /* $NetBSD: proc.h,v 1.19 2011/01/14 02:06:22 rmind 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 #include <machine/pcb.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_ */ 77