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 */ 36 37 /* 38 * 287/387 NPX Coprocessor Data Structures and Constants 39 * W. Jolitz 1/90 40 */ 41 42 #ifndef _MACHINE_NPX_H_ 43 #define _MACHINE_NPX_H_ 44 45 #include <x86/fpu.h> 46 47 #ifdef _KERNEL 48 49 struct fpu_kern_ctx; 50 51 #define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNNPX) == 0) 52 53 #define XSAVE_AREA_ALIGN 64 54 55 int npxdna(void); 56 void npxdrop(void); 57 void npxexit(struct thread *td); 58 int npxformat(void); 59 int npxgetregs(struct thread *td); 60 void npxinit(bool bsp); 61 void npxresume(union savefpu *addr); 62 void npxsave(union savefpu *addr); 63 int npxsetregs(struct thread *td, union savefpu *addr, 64 char *xfpustate, size_t xfpustate_size); 65 int npxsetxstate(struct thread *td, char *xfpustate, 66 size_t xfpustate_size); 67 void npxsuspend(union savefpu *addr); 68 int npxtrap_x87(void); 69 int npxtrap_sse(void); 70 void npxuserinited(struct thread *); 71 void npx_get_fsave(void *); 72 int npx_set_fsave(void *); 73 void npx_fill_fpregs_xmm(struct savexmm *, struct save87 *); 74 void npx_set_fpregs_xmm(struct save87 *, struct savexmm *); 75 76 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); 77 void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); 78 void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, 79 u_int flags); 80 int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx); 81 int fpu_kern_thread(u_int flags); 82 int is_fpu_kern_thread(u_int flags); 83 84 union savefpu *fpu_save_area_alloc(void); 85 void fpu_save_area_free(union savefpu *fsa); 86 void fpu_save_area_reset(union savefpu *fsa); 87 88 /* 89 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread(). 90 */ 91 #define FPU_KERN_NORMAL 0x0000 92 #define FPU_KERN_NOWAIT 0x0001 93 #define FPU_KERN_KTHR 0x0002 94 #define FPU_KERN_NOCTX 0x0004 95 96 #endif 97 98 #endif /* !_MACHINE_NPX_H_ */ 99