b24de3ac40
restore the FPU state from the format of machine FSAVE area. The intended use is for ABI emulators to provide FSAVE-formatted FPU state to usermode requiring it, while kernel could use FXSAVE due to XMM/XSAVE. The core functionality to convert from/to FXSAVE format is shared with the fill_fpregs_xmm() and set_fpregs_xmm(). Move the later functions to npx.c and rename them to npx_fill_fpregs_xmm() and npx_set_fpregs_xmm(). They differ from nptx_get/set_fsave(9) since our mcontext contains padding to be zeroed or ignored. fill_fpregs() and set_fpregs() could be converted to use the new interface, but there are small differences to handle. Sponsored by: The FreeBSD Foundation MFC after: 1 week
97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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/*
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* 287/387 NPX Coprocessor Data Structures and Constants
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* W. Jolitz 1/90
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*/
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#ifndef _MACHINE_NPX_H_
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#define _MACHINE_NPX_H_
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#include <x86/fpu.h>
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#ifdef _KERNEL
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struct fpu_kern_ctx;
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#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNNPX) == 0)
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#define XSAVE_AREA_ALIGN 64
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int npxdna(void);
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void npxdrop(void);
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void npxexit(struct thread *td);
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int npxformat(void);
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int npxgetregs(struct thread *td);
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void npxinit(bool bsp);
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void npxresume(union savefpu *addr);
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void npxsave(union savefpu *addr);
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int npxsetregs(struct thread *td, union savefpu *addr,
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char *xfpustate, size_t xfpustate_size);
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int npxsetxstate(struct thread *td, char *xfpustate,
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size_t xfpustate_size);
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void npxsuspend(union savefpu *addr);
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int npxtrap_x87(void);
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int npxtrap_sse(void);
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void npxuserinited(struct thread *);
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void npx_get_fsave(void *);
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int npx_set_fsave(void *);
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void npx_fill_fpregs_xmm(struct savexmm *, struct save87 *);
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void npx_set_fpregs_xmm(struct save87 *, struct savexmm *);
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struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
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void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
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int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
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u_int flags);
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int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
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int fpu_kern_thread(u_int flags);
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int is_fpu_kern_thread(u_int flags);
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union savefpu *fpu_save_area_alloc(void);
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void fpu_save_area_free(union savefpu *fsa);
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void fpu_save_area_reset(union savefpu *fsa);
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/*
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* Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
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*/
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#define FPU_KERN_NORMAL 0x0000
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#define FPU_KERN_NOWAIT 0x0001
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#define FPU_KERN_KTHR 0x0002
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#endif
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#endif /* !_MACHINE_NPX_H_ */
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