1 /* Copyright (c) 2022, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15 #include "internal.h"
16
17 #if defined(OPENSSL_AARCH64) && defined(OPENSSL_FREEBSD) && \
18 !defined(OPENSSL_STATIC_ARMCAP)
19
20 #include <machine/armreg.h>
21 #include <sys/types.h>
22
23 #include <openssl/arm_arch.h>
24
25 extern uint32_t OPENSSL_armcap_P;
26
27 // ID_AA64ISAR0_*_VAL are defined starting FreeBSD 13.0. When FreeBSD
28 // 12.x is out of support, these compatibility macros can be removed.
29
30 #ifndef ID_AA64ISAR0_AES_VAL
31 #define ID_AA64ISAR0_AES_VAL ID_AA64ISAR0_AES
32 #endif
33 #ifndef ID_AA64ISAR0_SHA1_VAL
34 #define ID_AA64ISAR0_SHA1_VAL ID_AA64ISAR0_SHA1
35 #endif
36 #ifndef ID_AA64ISAR0_SHA2_VAL
37 #define ID_AA64ISAR0_SHA2_VAL ID_AA64ISAR0_SHA2
38 #endif
39
OPENSSL_cpuid_setup(void)40 void OPENSSL_cpuid_setup(void) {
41 uint64_t id_aa64isar0 = READ_SPECIALREG(id_aa64isar0_el1);
42
43 OPENSSL_armcap_P |= ARMV7_NEON;
44
45 if (ID_AA64ISAR0_AES_VAL(id_aa64isar0) >= ID_AA64ISAR0_AES_BASE) {
46 OPENSSL_armcap_P |= ARMV8_AES;
47 }
48 if (ID_AA64ISAR0_AES_VAL(id_aa64isar0) >= ID_AA64ISAR0_AES_PMULL) {
49 OPENSSL_armcap_P |= ARMV8_PMULL;
50 }
51 if (ID_AA64ISAR0_SHA1_VAL(id_aa64isar0) >= ID_AA64ISAR0_SHA1_BASE) {
52 OPENSSL_armcap_P |= ARMV8_SHA1;
53 }
54 if (ID_AA64ISAR0_SHA2_VAL(id_aa64isar0) >= ID_AA64ISAR0_SHA2_BASE) {
55 OPENSSL_armcap_P |= ARMV8_SHA256;
56 }
57 if (ID_AA64ISAR0_SHA2_VAL(id_aa64isar0) >= ID_AA64ISAR0_SHA2_512) {
58 OPENSSL_armcap_P |= ARMV8_SHA512;
59 }
60 }
61
62 #endif // OPENSSL_AARCH64 && OPENSSL_FREEBSD && !OPENSSL_STATIC_ARMCAP
63