1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Andrew Turner under 6 * sponsorship from the FreeBSD Foundation. 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 * 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 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _MACHINE_VFP_H_ 33 #define _MACHINE_VFP_H_ 34 35 #ifndef LOCORE 36 struct vfpstate { 37 __uint128_t vfp_regs[32]; 38 uint32_t vfp_fpcr; 39 uint32_t vfp_fpsr; 40 }; 41 42 #ifdef _KERNEL 43 struct pcb; 44 struct thread; 45 46 void vfp_init(void); 47 void vfp_discard(struct thread *); 48 void vfp_restore_state(void); 49 void vfp_save_state(struct thread *, struct pcb *); 50 51 struct fpu_kern_ctx; 52 53 /* 54 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread(). 55 */ 56 #define FPU_KERN_NORMAL 0x0000 57 #define FPU_KERN_NOWAIT 0x0001 58 #define FPU_KERN_KTHR 0x0002 59 #define FPU_KERN_NOCTX 0x0004 60 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); 67 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) 72 73 #endif 74 75 #endif 76 77 #endif /* !_MACHINE_VFP_H_ */ 78