fpu.h revision 302408
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91 33 * $FreeBSD: stable/11/sys/amd64/include/fpu.h 271192 2014-09-06 15:23:28Z jhb $ 34 */ 35 36/* 37 * Floating Point Data Structures and Constants 38 * W. Jolitz 1/90 39 */ 40 41#ifndef _MACHINE_FPU_H_ 42#define _MACHINE_FPU_H_ 43 44#include <x86/fpu.h> 45 46#ifdef _KERNEL 47 48struct fpu_kern_ctx; 49 50#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0) 51 52#define XSAVE_AREA_ALIGN 64 53 54void fpudna(void); 55void fpudrop(void); 56void fpuexit(struct thread *td); 57int fpuformat(void); 58int fpugetregs(struct thread *td); 59void fpuinit(void); 60void fpurestore(void *addr); 61void fpuresume(void *addr); 62void fpusave(void *addr); 63int fpusetregs(struct thread *td, struct savefpu *addr, 64 char *xfpustate, size_t xfpustate_size); 65int fpusetxstate(struct thread *td, char *xfpustate, 66 size_t xfpustate_size); 67void fpususpend(void *addr); 68int fputrap_sse(void); 69int fputrap_x87(void); 70void fpuuserinited(struct thread *td); 71struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); 72void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); 73int 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 90#endif 91 92#endif /* !_MACHINE_FPU_H_ */ 93