mirror of
https://github.com/freebsd/freebsd-src
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120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
/*-
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* Copyright (c) 2015 The FreeBSD Foundation
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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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#ifdef __arm__
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#include <arm/vfp.h>
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#else /* !__arm__ */
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#ifndef _MACHINE_VFP_H_
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#define _MACHINE_VFP_H_
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/* VFPCR */
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#define VFPCR_AHP (0x04000000) /* alt. half-precision: */
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#define VFPCR_DN (0x02000000) /* default NaN enable */
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#define VFPCR_FZ (0x01000000) /* flush to zero enabled */
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#define VFPCR_INIT 0 /* Default fpcr after exec */
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#define VFPCR_RMODE_OFF 22 /* rounding mode offset */
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#define VFPCR_RMODE_MASK (0x00c00000) /* rounding mode mask */
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#define VFPCR_RMODE_RN (0x00000000) /* round nearest */
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#define VFPCR_RMODE_RPI (0x00400000) /* round to plus infinity */
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#define VFPCR_RMODE_RNI (0x00800000) /* round to neg infinity */
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#define VFPCR_RMODE_RM (0x00c00000) /* round to zero */
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#define VFPCR_STRIDE_OFF 20 /* vector stride -1 */
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#define VFPCR_STRIDE_MASK (0x00300000)
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#define VFPCR_LEN_OFF 16 /* vector length -1 */
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#define VFPCR_LEN_MASK (0x00070000)
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#define VFPCR_IDE (0x00008000) /* input subnormal exc enable */
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#define VFPCR_IXE (0x00001000) /* inexact exception enable */
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#define VFPCR_UFE (0x00000800) /* underflow exception enable */
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#define VFPCR_OFE (0x00000400) /* overflow exception enable */
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#define VFPCR_DZE (0x00000200) /* div by zero exception en */
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#define VFPCR_IOE (0x00000100) /* invalid op exec enable */
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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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struct thread;
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void vfp_init_secondary(void);
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void vfp_enable(void);
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void vfp_disable(void);
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void vfp_discard(struct thread *);
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void vfp_store(struct vfpstate *);
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void vfp_restore(struct vfpstate *);
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void vfp_new_thread(struct thread *, struct thread *, bool);
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void vfp_reset_state(struct thread *, struct pcb *);
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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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struct vfpstate *fpu_save_area_alloc(void);
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void fpu_save_area_free(struct vfpstate *fsa);
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void fpu_save_area_reset(struct vfpstate *fsa);
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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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#ifdef COMPAT_FREEBSD32
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void get_fpcontext32(struct thread *td, mcontext32_vfp_t *mcp);
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void set_fpcontext32(struct thread *td, mcontext32_vfp_t *mcp);
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#endif
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#endif
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#endif
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#endif /* !_MACHINE_VFP_H_ */
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#endif /* !__arm__ */
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