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  * 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: releng/11.2/sys/i386/include/npx.h 331722 2018-03-29 02:50:57Z eadler $
   34  */
   35 
   36 /*
   37  * 287/387 NPX Coprocessor Data Structures and Constants
   38  * W. Jolitz 1/90
   39  */
   40 
   41 #ifndef _MACHINE_NPX_H_
   42 #define _MACHINE_NPX_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_KERNNPX) == 0)
   51 
   52 #define XSAVE_AREA_ALIGN        64
   53 
   54 int     npxdna(void);
   55 void    npxdrop(void);
   56 void    npxexit(struct thread *td);
   57 int     npxformat(void);
   58 int     npxgetregs(struct thread *td);
   59 void    npxinit(bool bsp);
   60 void    npxresume(union savefpu *addr);
   61 void    npxsave(union savefpu *addr);
   62 int     npxsetregs(struct thread *td, union savefpu *addr,
   63             char *xfpustate, size_t xfpustate_size);
   64 int     npxsetxstate(struct thread *td, char *xfpustate,
   65             size_t xfpustate_size);
   66 void    npxsuspend(union savefpu *addr);
   67 int     npxtrap_x87(void);
   68 int     npxtrap_sse(void);
   69 void    npxuserinited(struct thread *);
   70 void    npx_get_fsave(void *);
   71 int     npx_set_fsave(void *);
   72 void    npx_fill_fpregs_xmm(struct savexmm *, struct save87 *);
   73 void    npx_set_fpregs_xmm(struct save87 *, struct savexmm *);
   74 
   75 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
   76 void    fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
   77 int     fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
   78             u_int flags);
   79 int     fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
   80 int     fpu_kern_thread(u_int flags);
   81 int     is_fpu_kern_thread(u_int flags);
   82 
   83 union savefpu   *fpu_save_area_alloc(void);
   84 void    fpu_save_area_free(union savefpu *fsa);
   85 void    fpu_save_area_reset(union savefpu *fsa);
   86 
   87 /*
   88  * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
   89  */
   90 #define FPU_KERN_NORMAL 0x0000
   91 #define FPU_KERN_NOWAIT 0x0001
   92 #define FPU_KERN_KTHR   0x0002
   93 
   94 #endif
   95 
   96 #endif /* !_MACHINE_NPX_H_ */

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