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Diffstat (limited to 'sys/amd64/include/fpu.h')
| -rw-r--r-- | sys/amd64/include/fpu.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/sys/amd64/include/fpu.h b/sys/amd64/include/fpu.h new file mode 100644 index 000000000000..8f957eede39b --- /dev/null +++ b/sys/amd64/include/fpu.h @@ -0,0 +1,96 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + * + * from: @(#)npx.h 5.3 (Berkeley) 1/18/91 + * $FreeBSD$ + */ + +/* + * Floating Point Data Structures and Constants + * W. Jolitz 1/90 + */ + +#ifndef _MACHINE_FPU_H_ +#define _MACHINE_FPU_H_ + +#include <x86/fpu.h> + +#ifdef _KERNEL + +struct fpu_kern_ctx; + +#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0) + +#define XSAVE_AREA_ALIGN 64 + +void fpudna(void); +void fpudrop(void); +void fpuexit(struct thread *td); +int fpuformat(void); +int fpugetregs(struct thread *td); +void fpuinit(void); +void fpurestore(void *addr); +void fpuresume(void *addr); +void fpusave(void *addr); +int fpusetregs(struct thread *td, struct savefpu *addr, + char *xfpustate, size_t xfpustate_size); +int fpusetxstate(struct thread *td, char *xfpustate, + size_t xfpustate_size); +void fpususpend(void *addr); +int fputrap_sse(void); +int fputrap_x87(void); +void fpuuserinited(struct thread *td); +struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); +struct fpu_kern_ctx *fpu_kern_alloc_ctx_domain(int domain, u_int flags); +void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); +void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, + u_int flags); +int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx); +int fpu_kern_thread(u_int flags); +int is_fpu_kern_thread(u_int flags); + +struct savefpu *fpu_save_area_alloc(void); +void fpu_save_area_free(struct savefpu *fsa); +void fpu_save_area_reset(struct savefpu *fsa); + +/* + * 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 + +#endif + +#endif /* !_MACHINE_FPU_H_ */ |