simd_powerpc.h

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    1 /*
    2  * CDDL HEADER START
    3  *
    4  * The contents of this file are subject to the terms of the
    5  * Common Development and Distribution License (the "License").
    6  * You may not use this file except in compliance with the License.
    7  *
    8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
    9  * or https://opensource.org/licenses/CDDL-1.0.
   10  * See the License for the specific language governing permissions
   11  * and limitations under the License.
   12  *
   13  * When distributing Covered Code, include this CDDL HEADER in each
   14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
   15  * If applicable, add the following below this CDDL HEADER, with the
   16  * fields enclosed by brackets "[]" replaced with your own identifying
   17  * information: Portions Copyright [yyyy] [name of copyright owner]
   18  *
   19  * CDDL HEADER END
   20  */
   21 
   22 /*
   23  * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
   24  */
   25 
   26 /*
   27  * USER API:
   28  *
   29  * Kernel fpu methods:
   30  *      kfpu_allowed()
   31  *      kfpu_begin()
   32  *      kfpu_end()
   33  *      kfpu_init()
   34  *      kfpu_fini()
   35  *
   36  * SIMD support:
   37  *
   38  * Following functions should be called to determine whether CPU feature
   39  * is supported. All functions are usable in kernel and user space.
   40  * If a SIMD algorithm is using more than one instruction set
   41  * all relevant feature test functions should be called.
   42  *
   43  * Supported features:
   44  *   zfs_altivec_available()
   45  *   zfs_vsx_available()
   46  *   zfs_isa207_available()
   47  */
   48 
   49 #ifndef _FREEBSD_SIMD_POWERPC_H
   50 #define _FREEBSD_SIMD_POWERPC_H
   51 
   52 #include <sys/types.h>
   53 #include <sys/cdefs.h>
   54 
   55 #include <machine/pcb.h>
   56 #include <machine/cpu.h>
   57 
   58 /* FreeBSD doesn't support floating point on powerpc kernel yet */
   59 #define kfpu_allowed()          0
   60 
   61 #define kfpu_initialize(tsk)    do {} while (0)
   62 #define kfpu_begin()            do {} while (0)
   63 #define kfpu_end()              do {} while (0)
   64 #define kfpu_init()             (0)
   65 #define kfpu_fini()             do {} while (0)
   66 
   67 /*
   68  * Check if Altivec is available
   69  */
   70 static inline boolean_t
   71 zfs_altivec_available(void)
   72 {
   73         return ((cpu_features & PPC_FEATURE_HAS_ALTIVEC) != 0);
   74 }
   75 
   76 /*
   77  * Check if VSX is available
   78  */
   79 static inline boolean_t
   80 zfs_vsx_available(void)
   81 {
   82         return ((cpu_features & PPC_FEATURE_HAS_VSX) != 0);
   83 }
   84 
   85 /*
   86  * Check if POWER ISA 2.07 is available (SHA2)
   87  */
   88 static inline boolean_t
   89 zfs_isa207_available(void)
   90 {
   91         return ((cpu_features2 & PPC_FEATURE2_ARCH_2_07) != 0);
   92 }
   93 
   94 #endif

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/os/freebsd/spl/sys/simd_powerpc.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/simd_powerpc.h