fpu.h revision 262981 
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/amd64/include/fpu.h 262981 2014-03-10 20:47:24Z jkim $
34 */
35
36/*
37 * Floating Point Data Structures and Constants
38 * W. Jolitz 1/90
39 */
40
41#ifndef _MACHINE_FPU_H_
42#define	_MACHINE_FPU_H_
43
44#include <x86/fpu.h>
45
46#ifdef _KERNEL
47
48struct fpu_kern_ctx;
49
50#define	PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
51
52#define	XSAVE_AREA_ALIGN	64
53
54void	fpudna(void);
55void	fpudrop(void);
56void	fpuexit(struct thread *td);
57int	fpuformat(void);
58int	fpugetregs(struct thread *td);
59void	fpuinit(void);
60void	fpurestore(void *addr);
61void	fpusave(void *addr);
62int	fpusetregs(struct thread *td, struct savefpu *addr,
63	    char *xfpustate, size_t xfpustate_size);
64int	fpusetxstate(struct thread *td, char *xfpustate,
65	    size_t xfpustate_size);
66void	fpususpend(void *addr);
67int	fputrap_sse(void);
68int	fputrap_x87(void);
69void	fpuuserinited(struct thread *td);
70struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
71void	fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
72int	fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
73	    u_int flags);
74int	fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
75int	fpu_kern_thread(u_int flags);
76int	is_fpu_kern_thread(u_int flags);
77
78struct savefpu	*fpu_save_area_alloc(void);
79void	fpu_save_area_free(struct savefpu *fsa);
80void	fpu_save_area_reset(struct savefpu *fsa);
81
82/*
83 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
84 */
85#define	FPU_KERN_NORMAL	0x0000
86#define	FPU_KERN_NOWAIT	0x0001
87
88#endif
89
90#endif /* !_MACHINE_FPU_H_ */
91