1 /*
2 * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29 /*
30 * SIMD support:
31 *
32 * Following functions should be called to determine whether CPU feature
33 * is supported. All functions are usable in kernel and user space.
34 * If a SIMD algorithm is using more than one instruction set
35 * all relevant feature test functions should be called.
36 *
37 * Supported features:
38 * zfs_altivec_available()
39 * zfs_vsx_available()
40 * zfs_isa207_available()
41 */
42
43 #ifndef _FREEBSD_SIMD_POWERPC_H
44 #define _FREEBSD_SIMD_POWERPC_H
45
46 #include <sys/types.h>
47 #include <sys/cdefs.h>
48
49 #include <machine/pcb.h>
50 #include <machine/cpu.h>
51
52 /* FreeBSD doesn't support floating point on powerpc kernel yet */
53 #define kfpu_allowed() 0
54
55 #define kfpu_initialize(tsk) do {} while (0)
56 #define kfpu_begin() do {} while (0)
57 #define kfpu_end() do {} while (0)
58 #define kfpu_init() (0)
59 #define kfpu_fini() do {} while (0)
60
61 /*
62 * Check if Altivec is available
63 */
64 static inline boolean_t
zfs_altivec_available(void)65 zfs_altivec_available(void)
66 {
67 return ((cpu_features & PPC_FEATURE_HAS_ALTIVEC) != 0);
68 }
69
70 /*
71 * Check if VSX is available
72 */
73 static inline boolean_t
zfs_vsx_available(void)74 zfs_vsx_available(void)
75 {
76 return ((cpu_features & PPC_FEATURE_HAS_VSX) != 0);
77 }
78
79 /*
80 * Check if POWER ISA 2.07 is available (SHA2)
81 */
82 static inline boolean_t
zfs_isa207_available(void)83 zfs_isa207_available(void)
84 {
85 return ((cpu_features2 & PPC_FEATURE2_ARCH_2_07) != 0);
86 }
87
88 #endif
89