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 * $FreeBSD$ 36 */ 37 38 /* 39 * Floating Point Data Structures and Constants 40 * W. Jolitz 1/90 41 */ 42 43 #ifndef _MACHINE_FPU_H_ 44 #define _MACHINE_FPU_H_ 45 46 #include <x86/fpu.h> 47 48 #ifdef _KERNEL 49 50 struct fpu_kern_ctx; 51 52 #define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0) 53 54 #define XSAVE_AREA_ALIGN 64 55 56 void fpudna(void); 57 void fpudrop(void); 58 void fpuexit(struct thread *td); 59 int fpuformat(void); 60 int fpugetregs(struct thread *td); 61 void fpuinit(void); 62 void fpurestore(void *addr); 63 void fpuresume(void *addr); 64 void fpusave(void *addr); 65 int fpusetregs(struct thread *td, struct savefpu *addr, 66 char *xfpustate, size_t xfpustate_size); 67 int fpusetxstate(struct thread *td, char *xfpustate, 68 size_t xfpustate_size); 69 void fpususpend(void *addr); 70 int fputrap_sse(void); 71 int fputrap_x87(void); 72 void fpuuserinited(struct thread *td); 73 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); 74 void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); 75 void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, 76 u_int flags); 77 int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx); 78 int fpu_kern_thread(u_int flags); 79 int is_fpu_kern_thread(u_int flags); 80 81 struct savefpu *fpu_save_area_alloc(void); 82 void fpu_save_area_free(struct savefpu *fsa); 83 void 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_ */ 96