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
35/*
36 * Floating Point Data Structures and Constants
37 * W. Jolitz 1/90
38 */
39
40#ifndef _MACHINE_FPU_H_
41#define _MACHINE_FPU_H_
42
43#include <x86/fpu.h>
44
45#ifdef _KERNEL
46
47struct fpu_kern_ctx;
48
49#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
50
51#define XSAVE_AREA_ALIGN 64
52
53void fpudna(void);
54void fpudrop(void);
55void fpuexit(struct thread *td);
56int fpuformat(void);
57int fpugetregs(struct thread *td);
58void fpuinit(void);
59void fpurestore(void *addr);
60void fpuresume(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);
71struct fpu_kern_ctx *fpu_kern_alloc_ctx_domain(int domain, u_int flags);
72void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
73void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
74 u_int flags);
75int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
76int fpu_kern_thread(u_int flags);
77int is_fpu_kern_thread(u_int flags);
78
79struct savefpu *fpu_save_area_alloc(void);
80void fpu_save_area_free(struct savefpu *fsa);
81void fpu_save_area_reset(struct savefpu *fsa);
82
83/*
84 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
85 */
86#define FPU_KERN_NORMAL 0x0000
87#define FPU_KERN_NOWAIT 0x0001
88#define FPU_KERN_KTHR 0x0002
89#define FPU_KERN_NOCTX 0x0004
90
91#endif
92
93#endif /* !_MACHINE_FPU_H_ */