npx.h revision 268033 
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	from: @(#)npx.h	5.3 (Berkeley) 1/18/91
33 * $FreeBSD: stable/10/sys/i386/include/npx.h 268033 2014-06-30 09:48:44Z kib $
34 */
35
36/*
37 * 287/387 NPX Coprocessor Data Structures and Constants
38 * W. Jolitz 1/90
39 */
40
41#ifndef _MACHINE_NPX_H_
42#define	_MACHINE_NPX_H_
43
44#include <x86/fpu.h>
45
46#ifdef _KERNEL
47
48#define	PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNNPX) == 0)
49
50int	npxdna(void);
51void	npxdrop(void);
52void	npxexit(struct thread *td);
53int	npxformat(void);
54int	npxgetregs(struct thread *td);
55void	npxinit(void);
56void	npxsave(union savefpu *addr);
57void	npxsetregs(struct thread *td, union savefpu *addr);
58int	npxtrap_x87(void);
59int	npxtrap_sse(void);
60void	npxuserinited(struct thread *);
61struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
62void	fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
63int	fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
64	    u_int flags);
65int	fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
66int	fpu_kern_thread(u_int flags);
67int	is_fpu_kern_thread(u_int flags);
68
69/*
70 * Flags for fpu_kern_enter() and fpu_kern_thread().
71 */
72#define	FPU_KERN_NORMAL	0x0000
73#define	FPU_KERN_NOWAIT	0x0001
74#define	FPU_KERN_KTHR	0x0002
75
76#endif
77
78#endif /* !_MACHINE_NPX_H_ */
79