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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
42 lines
1.8 KiB
C
42 lines
1.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2008 Nathan Whitehorn
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _MACHINE_ALTIVEC_H_
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#define _MACHINE_ALTIVEC_H_
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#define ALTIVEC_VSCR_NJ 0x00010000 /* Enable non-Java mode */
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#define ALTIVEC_VSCR_SAT 0x00000001 /* Saturation status bit */
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void enable_vec(struct thread *);
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void save_vec(struct thread *);
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void save_vec_nodrop(struct thread *);
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void enable_vec_kern(void);
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void disable_vec(struct thread *td);
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#endif /* _MACHINE_ALTIVEC_H_ */
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