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 * 287/387 NPX Coprocessor Data Structures and Constants
37 * W. Jolitz 1/90
38 */
39
40#ifndef _MACHINE_NPX_H_
41#define _MACHINE_NPX_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_KERNNPX) == 0)
50
51#define XSAVE_AREA_ALIGN 64
52
53int npxdna(void);
54void npxdrop(void);
55void npxexit(struct thread *td);
56int npxformat(void);
57int npxgetregs(struct thread *td);
58void npxinit(bool bsp);
59void npxresume(union savefpu *addr);
60void npxsave(union savefpu *addr);
61int npxsetregs(struct thread *td, union savefpu *addr,
62 char *xfpustate, size_t xfpustate_size);
63int npxsetxstate(struct thread *td, char *xfpustate,
64 size_t xfpustate_size);
65void npxsuspend(union savefpu *addr);
66int npxtrap_x87(void);
67int npxtrap_sse(void);
68void npxuserinited(struct thread *);
69void npx_get_fsave(void *);
70int npx_set_fsave(void *);
71void npx_fill_fpregs_xmm(struct savexmm *, struct save87 *);
72void npx_set_fpregs_xmm(struct save87 *, struct savexmm *);
73
74struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
75void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
76void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
77 u_int flags);
78int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
79int fpu_kern_thread(u_int flags);
80int is_fpu_kern_thread(u_int flags);
81
82union savefpu *fpu_save_area_alloc(void);
83void fpu_save_area_free(union savefpu *fsa);
84void fpu_save_area_reset(union savefpu *fsa);
85
86/*
87 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
88 */
89#define FPU_KERN_NORMAL 0x0000
90#define FPU_KERN_NOWAIT 0x0001
91#define FPU_KERN_KTHR 0x0002
92#define FPU_KERN_NOCTX 0x0004
93
94#endif
95
96#endif /* !_MACHINE_NPX_H_ */