freebsd-skq/sys/arm64/include/vfp.h
andrew 44e79a530d Add support for passing FPU_KERN_NOCTX to fpu_kern_enter on arm64. This
will be used to call into UEFI from the kernel.

Sponsored by:	DARPA, AFRL
2017-07-18 16:36:32 +00:00

73 lines
2.3 KiB
C

/*-
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Andrew Turner under
* sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_VFP_H_
#define _MACHINE_VFP_H_
#ifndef LOCORE
struct vfpstate {
__uint128_t vfp_regs[32];
uint32_t vfp_fpcr;
uint32_t vfp_fpsr;
};
#ifdef _KERNEL
struct pcb;
void vfp_init(void);
void vfp_discard(struct thread *);
void vfp_restore_state(void);
void vfp_save_state(struct thread *, struct pcb *);
struct fpu_kern_ctx;
/*
* Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
*/
#define FPU_KERN_NORMAL 0x0000
#define FPU_KERN_NOWAIT 0x0001
#define FPU_KERN_KTHR 0x0002
#define FPU_KERN_NOCTX 0x0004
struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int);
void fpu_kern_free_ctx(struct fpu_kern_ctx *);
int fpu_kern_enter(struct thread *, struct fpu_kern_ctx *, u_int);
int fpu_kern_leave(struct thread *, struct fpu_kern_ctx *);
int fpu_kern_thread(u_int);
int is_fpu_kern_thread(u_int);
#endif
#endif
#endif /* !_MACHINE_VFP_H_ */