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/*
* Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
* All rights reserved.
*
* 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 AUTHORS 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 AUTHORS 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.
*
* $FreeBSD$
*/
/*
* SIMD support:
*
* Following functions should be called to determine whether CPU feature
* is supported. All functions are usable in kernel and user space.
* If a SIMD algorithm is using more than one instruction set
* all relevant feature test functions should be called.
*
* Supported features:
* zfs_neon_available()
* zfs_sha256_available()
* zfs_sha512_available()
*/
#ifndef _FREEBSD_SIMD_AARCH64_H
#define _FREEBSD_SIMD_AARCH64_H
#include <sys/types.h>
#include <sys/ucontext.h>
#include <machine/elf.h>
#include <machine/fpu.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
#define kfpu_allowed() 1
#define kfpu_initialize(tsk) do {} while (0)
#define kfpu_begin() do { \
if (__predict_false(!is_fpu_kern_thread(0))) \
fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX); \
} while (0)
#define kfpu_end() do { \
if (__predict_false(curthread->td_pcb->pcb_fpflags & PCB_FP_NOSAVE)) \
fpu_kern_leave(curthread, NULL); \
} while (0)
#define kfpu_init() (0)
#define kfpu_fini() do {} while (0)
/*
* Check if NEON is available
*/
static inline boolean_t
zfs_neon_available(void)
{
return (elf_hwcap & HWCAP_FP);
}
/*
* Check if SHA256 is available
*/
static inline boolean_t
zfs_sha256_available(void)
{
return (elf_hwcap & HWCAP_SHA2);
}
/*
* Check if SHA512 is available
*/
static inline boolean_t
zfs_sha512_available(void)
{
return (elf_hwcap & HWCAP_SHA512);
}
#endif /* _FREEBSD_SIMD_AARCH64_H */
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