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 * 3. 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 * $FreeBSD$ 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 48 struct fpu_kern_ctx; 49 50 #define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0) 51 52 #define XSAVE_AREA_ALIGN 64 53 54 void fpudna(void); 55 void fpudrop(void); 56 void fpuexit(struct thread *td); 57 int fpuformat(void); 58 int fpugetregs(struct thread *td); 59 void fpuinit(void); 60 void fpurestore(void *addr); 61 void fpuresume(void *addr); 62 void fpusave(void *addr); 63 int fpusetregs(struct thread *td, struct savefpu *addr, 64 char *xfpustate, size_t xfpustate_size); 65 int fpusetxstate(struct thread *td, char *xfpustate, 66 size_t xfpustate_size); 67 void fpususpend(void *addr); 68 int fputrap_sse(void); 69 int fputrap_x87(void); 70 void fpuuserinited(struct thread *td); 71 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); 72 void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); 73 int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, 74 u_int flags); 75 int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx); 76 int fpu_kern_thread(u_int flags); 77 int is_fpu_kern_thread(u_int flags); 78 79 struct savefpu *fpu_save_area_alloc(void); 80 void fpu_save_area_free(struct savefpu *fsa); 81 void 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_ */ 94