2 * Copyright (c) 2015 The FreeBSD Foundation
5 * This software was developed by Andrew Turner under
6 * sponsorship from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #ifndef _MACHINE_VFP_H_
33 #define _MACHINE_VFP_H_
38 __uint128_t vfp_regs[32];
47 void vfp_discard(struct thread *);
48 void vfp_restore_state(void);
49 void vfp_save_state(struct thread *, struct pcb *);
54 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
56 #define FPU_KERN_NORMAL 0x0000
57 #define FPU_KERN_NOWAIT 0x0001
58 #define FPU_KERN_KTHR 0x0002
59 #define FPU_KERN_NOCTX 0x0004
61 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int);
62 void fpu_kern_free_ctx(struct fpu_kern_ctx *);
63 void fpu_kern_enter(struct thread *, struct fpu_kern_ctx *, u_int);
64 int fpu_kern_leave(struct thread *, struct fpu_kern_ctx *);
65 int fpu_kern_thread(u_int);
66 int is_fpu_kern_thread(u_int);
68 /* Convert to and from Aarch32 FPSCR to Aarch64 FPCR/FPSR */
69 #define VFP_FPSCR_FROM_SRCR(vpsr, vpcr) ((vpsr) | ((vpcr) & 0x7c00000))
70 #define VFP_FPSR_FROM_FPSCR(vpscr) ((vpscr) &~ 0x7c00000)
71 #define VFP_FPCR_FROM_FPSCR(vpsrc) ((vpsrc) & 0x7c00000)
77 #endif /* !_MACHINE_VFP_H_ */