Annotation of sys/arch/alpha/include/proc.h, Revision 1.1
1.1 ! nbrk 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 */
CVSweb