78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*-
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* Copyright (c) 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_VFP_H_
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#define _MACHINE_VFP_H_
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#ifndef LOCORE
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struct vfpstate {
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__uint128_t vfp_regs[32];
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uint32_t vfp_fpcr;
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uint32_t vfp_fpsr;
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};
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#ifdef _KERNEL
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struct pcb;
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void vfp_init(void);
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void vfp_discard(struct thread *);
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void vfp_restore_state(void);
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void vfp_save_state(struct thread *, struct pcb *);
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struct fpu_kern_ctx;
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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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#define FPU_KERN_NOCTX 0x0004
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struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int);
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void fpu_kern_free_ctx(struct fpu_kern_ctx *);
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void fpu_kern_enter(struct thread *, struct fpu_kern_ctx *, u_int);
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int fpu_kern_leave(struct thread *, struct fpu_kern_ctx *);
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int fpu_kern_thread(u_int);
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int is_fpu_kern_thread(u_int);
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/* Convert to and from Aarch32 FPSCR to Aarch64 FPCR/FPSR */
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#define VFP_FPSCR_FROM_SRCR(vpsr, vpcr) ((vpsr) | ((vpcr) & 0x7c00000))
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#define VFP_FPSR_FROM_FPSCR(vpscr) ((vpscr) &~ 0x7c00000)
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#define VFP_FPCR_FROM_FPSCR(vpsrc) ((vpsrc) & 0x7c00000)
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#endif
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#endif
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#endif /* !_MACHINE_VFP_H_ */
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