xref: /freebsd/sys/i386/include/npx.h (revision 298f5fdc242b760e70cd3494e3a4f1f50b20664d)
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  * $FreeBSD$
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 
50 int	npxdna(void);
51 void	npxdrop(void);
52 void	npxexit(struct thread *td);
53 int	npxformat(void);
54 int	npxgetregs(struct thread *td);
55 void	npxinit(void);
56 void	npxsave(union savefpu *addr);
57 void	npxsetregs(struct thread *td, union savefpu *addr);
58 int	npxtrap_x87(void);
59 int	npxtrap_sse(void);
60 void	npxuserinited(struct thread *);
61 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
62 void	fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
63 int	fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
64 	    u_int flags);
65 int	fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
66 int	fpu_kern_thread(u_int flags);
67 int	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