master
1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (C) 1996 Wolfgang Solfrank.
5 * Copyright (C) 1996 TooLs GmbH.
6 * All rights reserved.
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * $NetBSD: fpu.h,v 1.2 1999/12/07 15:14:56 danw Exp $
34 */
35
36#ifndef _MACHINE_FPU_H_
37#define _MACHINE_FPU_H_
38
39#define FPSCR_FX 0x80000000
40#define FPSCR_FEX 0x40000000
41#define FPSCR_VX 0x20000000
42#define FPSCR_OX 0x10000000
43#define FPSCR_UX 0x08000000
44#define FPSCR_ZX 0x04000000
45#define FPSCR_XX 0x02000000
46#define FPSCR_VXSNAN 0x01000000
47#define FPSCR_VXISI 0x00800000
48#define FPSCR_VXIDI 0x00400000
49#define FPSCR_VXZDZ 0x00200000
50#define FPSCR_VXIMZ 0x00100000
51#define FPSCR_VXVC 0x00080000
52#define FPSCR_FR 0x00040000
53#define FPSCR_FI 0x00020000
54#define FPSCR_FPRF 0x0001f000
55#define FPSCR_C 0x00010000
56#define FPSCR_FPCC 0x0000f000
57#define FPSCR_FL 0x00008000
58#define FPSCR_FG 0x00004000
59#define FPSCR_FE 0x00002000
60#define FPSCR_FU 0x00001000
61#define FPSCR_VXSOFT 0x00000400
62#define FPSCR_VXSQRT 0x00000200
63#define FPSCR_VXCVI 0x00000100
64#define FPSCR_VE 0x00000080
65#define FPSCR_OE 0x00000040
66#define FPSCR_UE 0x00000020
67#define FPSCR_ZE 0x00000010
68#define FPSCR_XE 0x00000008
69#define FPSCR_NI 0x00000004
70#define FPSCR_RN 0x00000003
71
72#ifdef _KERNEL
73
74void enable_fpu(struct thread *);
75void save_fpu(struct thread *);
76void save_fpu_nodrop(struct thread *);
77void cleanup_fpscr(void);
78u_int get_fpu_exception(struct thread *);
79void enable_fpu_kern(void);
80void disable_fpu(struct thread *td);
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#define FPU_KERN_KTHR 0x0002
88#define FPU_KERN_NOCTX 0x0004
89
90struct fpu_kern_ctx;
91
92struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
93void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
94void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
95 u_int flags);
96int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
97int fpu_kern_thread(u_int flags);
98int is_fpu_kern_thread(u_int flags);
99
100#endif /* _KERNEL */
101
102#endif /* _MACHINE_FPU_H_ */