The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/npx.h

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    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: head/sys/i386/include/npx.h 329878 2018-02-23 20:15:19Z cem $
   36  */
   37 
   38 /*
   39  * 287/387 NPX Coprocessor Data Structures and Constants
   40  * W. Jolitz 1/90
   41  */
   42 
   43 #ifndef _MACHINE_NPX_H_
   44 #define _MACHINE_NPX_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_KERNNPX) == 0)
   53 
   54 #define XSAVE_AREA_ALIGN        64
   55 
   56 int     npxdna(void);
   57 void    npxdrop(void);
   58 void    npxexit(struct thread *td);
   59 int     npxformat(void);
   60 int     npxgetregs(struct thread *td);
   61 void    npxinit(bool bsp);
   62 void    npxresume(union savefpu *addr);
   63 void    npxsave(union savefpu *addr);
   64 int     npxsetregs(struct thread *td, union savefpu *addr,
   65             char *xfpustate, size_t xfpustate_size);
   66 int     npxsetxstate(struct thread *td, char *xfpustate,
   67             size_t xfpustate_size);
   68 void    npxsuspend(union savefpu *addr);
   69 int     npxtrap_x87(void);
   70 int     npxtrap_sse(void);
   71 void    npxuserinited(struct thread *);
   72 void    npx_get_fsave(void *);
   73 int     npx_set_fsave(void *);
   74 void    npx_fill_fpregs_xmm(struct savexmm *, struct save87 *);
   75 void    npx_set_fpregs_xmm(struct save87 *, struct savexmm *);
   76 
   77 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
   78 void    fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
   79 void    fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
   80             u_int flags);
   81 int     fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
   82 int     fpu_kern_thread(u_int flags);
   83 int     is_fpu_kern_thread(u_int flags);
   84 
   85 union savefpu   *fpu_save_area_alloc(void);
   86 void    fpu_save_area_free(union savefpu *fsa);
   87 void    fpu_save_area_reset(union savefpu *fsa);
   88 
   89 /*
   90  * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
   91  */
   92 #define FPU_KERN_NORMAL 0x0000
   93 #define FPU_KERN_NOWAIT 0x0001
   94 #define FPU_KERN_KTHR   0x0002
   95 
   96 #endif
   97 
   98 #endif /* !_MACHINE_NPX_H_ */

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