1 /* $OpenBSD: proc.h,v 1.10 2006/03/17 21:43:29 miod Exp $ */ 2 /* $NetBSD: proc.h,v 1.2 1995/03/24 15:01:36 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31 #include <machine/cpu.h> 32 /* 33 * Machine-dependent part of the proc struct for the Alpha. 34 */ 35 36 struct mdbpt { 37 vaddr_t addr; 38 u_int32_t contents; 39 }; 40 41 struct mdproc { 42 u_long md_flags; 43 struct trapframe *md_tf; /* trap/syscall registers */ 44 struct pcb *md_pcbpaddr; /* phys addr of the pcb */ 45 struct mdbpt md_sstep[2]; /* two breakpoints for sstep */ 46 }; 47 48 /* 49 * md_flags usage 50 * -------------- 51 * MDP_FPUSED 52 * A largely unused bit indicating the presence of FPU history. 53 * Cleared on exec. Set but not used by the fpu context switcher 54 * itself. 55 * 56 * MDP_FP_C 57 * The architected FP Control word. It should forever begin at bit 1, 58 * as the bits are AARM specified and this way it doesn't need to be 59 * shifted. 60 * 61 * Until C99 there was never an IEEE 754 API, making most of the 62 * standard useless. Because of overlapping AARM, OSF/1, NetBSD, and 63 * C99 API's, the use of the MDP_FP_C bits is defined variously in 64 * ieeefp.h and fpu.h. 65 */ 66 #define MDP_FPUSED 0x00000001 /* Process used the FPU */ 67 #ifndef NO_IEEE 68 #define MDP_FP_C 0x007ffffe /* Extended FP_C Quadword bits */ 69 #endif 70 #define MDP_STEP1 0x00800000 /* Single step normal */ 71 #define MDP_STEP2 0x01800000 /* Single step branch */ 72