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a6662c37b6
Summary: Provide an implementation of fpu_kern_enter/fpu_kern_leave for PPC to enable FPU, VSX, and Altivec usage in-kernel. The functions currently only support FPU_KERN_NOCTX, but this is sufficient for ossl(1) and many other users of the API. This patchset has been tested on powerpc64le using a modified version of the in-tree tools/tools/crypto/cryptocheck.c tool to check for FPU/Vec register clobbering along with a follow-up patch to enable ossl(4) on powerpc64*. Reviewed by: jhibbits MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D41540
103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: fpu.h,v 1.2 1999/12/07 15:14:56 danw Exp $
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*/
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#ifndef _MACHINE_FPU_H_
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#define _MACHINE_FPU_H_
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#define FPSCR_FX 0x80000000
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#define FPSCR_FEX 0x40000000
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#define FPSCR_VX 0x20000000
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#define FPSCR_OX 0x10000000
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#define FPSCR_UX 0x08000000
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#define FPSCR_ZX 0x04000000
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#define FPSCR_XX 0x02000000
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#define FPSCR_VXSNAN 0x01000000
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#define FPSCR_VXISI 0x00800000
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#define FPSCR_VXIDI 0x00400000
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#define FPSCR_VXZDZ 0x00200000
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#define FPSCR_VXIMZ 0x00100000
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#define FPSCR_VXVC 0x00080000
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#define FPSCR_FR 0x00040000
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#define FPSCR_FI 0x00020000
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#define FPSCR_FPRF 0x0001f000
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#define FPSCR_C 0x00010000
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#define FPSCR_FPCC 0x0000f000
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#define FPSCR_FL 0x00008000
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#define FPSCR_FG 0x00004000
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#define FPSCR_FE 0x00002000
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#define FPSCR_FU 0x00001000
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#define FPSCR_VXSOFT 0x00000400
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#define FPSCR_VXSQRT 0x00000200
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#define FPSCR_VXCVI 0x00000100
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#define FPSCR_VE 0x00000080
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#define FPSCR_OE 0x00000040
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#define FPSCR_UE 0x00000020
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#define FPSCR_ZE 0x00000010
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#define FPSCR_XE 0x00000008
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#define FPSCR_NI 0x00000004
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#define FPSCR_RN 0x00000003
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#ifdef _KERNEL
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void enable_fpu(struct thread *);
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void save_fpu(struct thread *);
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void save_fpu_nodrop(struct thread *);
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void cleanup_fpscr(void);
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u_int get_fpu_exception(struct thread *);
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void enable_fpu_kern(void);
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void disable_fpu(struct thread *td);
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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;
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struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
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void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
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void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
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u_int flags);
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int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
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int fpu_kern_thread(u_int flags);
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int is_fpu_kern_thread(u_int flags);
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#endif /* _KERNEL */
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#endif /* _MACHINE_FPU_H_ */
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