1/*-
 2 * SPDX-License-Identifier: BSD-3-Clause
 3 *
 4 * Copyright (c) 1990 The Regents of the University of California.
 5 * All rights reserved.
 6 *
 7 * This code is derived from software contributed to Berkeley by
 8 * William Jolitz.
 9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	from: @(#)npx.h	5.3 (Berkeley) 1/18/91
35 */
36
37/*
38 * Floating Point Data Structures and Constants
39 * W. Jolitz 1/90
40 */
41
42#ifndef _MACHINE_FPU_H_
43#define	_MACHINE_FPU_H_
44
45#include <x86/fpu.h>
46
47#ifdef _KERNEL
48
49struct fpu_kern_ctx;
50
51#define	PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
52
53#define	XSAVE_AREA_ALIGN	64
54
55void	fpudna(void);
56void	fpudrop(void);
57void	fpuexit(struct thread *td);
58int	fpuformat(void);
59int	fpugetregs(struct thread *td);
60void	fpuinit(void);
61void	fpurestore(void *addr);
62void	fpuresume(void *addr);
63void	fpusave(void *addr);
64int	fpusetregs(struct thread *td, struct savefpu *addr,
65	    char *xfpustate, size_t xfpustate_size);
66int	fpusetxstate(struct thread *td, char *xfpustate,
67	    size_t xfpustate_size);
68void	fpususpend(void *addr);
69int	fputrap_sse(void);
70int	fputrap_x87(void);
71void	fpuuserinited(struct thread *td);
72struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
73struct fpu_kern_ctx *fpu_kern_alloc_ctx_domain(int domain, u_int flags);
74void	fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
75void	fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
76	    u_int flags);
77int	fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
78int	fpu_kern_thread(u_int flags);
79int	is_fpu_kern_thread(u_int flags);
80
81struct savefpu	*fpu_save_area_alloc(void);
82void	fpu_save_area_free(struct savefpu *fsa);
83void	fpu_save_area_reset(struct savefpu *fsa);
84
85/*
86 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
87 */
88#define	FPU_KERN_NORMAL	0x0000
89#define	FPU_KERN_NOWAIT	0x0001
90#define	FPU_KERN_KTHR	0x0002
91#define	FPU_KERN_NOCTX	0x0004
92
93#endif
94
95#endif /* !_MACHINE_FPU_H_ */